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物理化学学报 2021年第12期37卷 1-151页

作者：常诚陈伟陈也陈永华陈雨丁峰樊春海范红金范战西龚成宫勇吉何其远洪勋胡晟胡伟达黄维黄元季威李德慧李连忠李强林立凌崇益刘鸣华刘楠刘庄 Kian Ping Loh 马建民缪峰彭海琳邵明飞宋礼苏邵孙硕谭超良唐智勇王定胜王欢王金兰王欣王欣然 Andrew T.S.Wee 魏钟鸣吴宇恩吴忠帅熊杰熊启华徐伟高尹鹏曾海波曾志远翟天佑张晗张辉张其春张铁锐张翔赵立东赵美廷赵伟杰赵运宣周凯歌周兴周喻朱宏伟张华刘忠范 Institute of Science and Technology Austria Am Campus 13400 KlosterneuburgAustria Department of Chemistry National University of Singapore3 Science Drive 3117543Singapore Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong KongChina Key Laboratory of Flexible Electronics and Institute of Advanced Materials Nanjing Tech UniversityNanjing 211816China School of Life Sciences Shanghai UniversityShanghai 200444China Centre for Multidimensional Carbon Materials Institute for Basic ScienceUlsan 44919Korea School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore Department of Chemistry City University of Hong KongKowloonHong KongChina Department of Electrical and Computer Engineering and Quantum Technology Center University of MarylandCollege ParkMaryland 20742USA School of Materials Science and Engineering Beihang UniversityBeijing 100191China Department of Materials Science and Engineering City University of Hong KongKowloonHong KongChina Center of Advanced Nanocatalysis(CAN) Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China College of Chemistry and Chemical Engineering State Key Laboratory of Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy Materials(iChEM)Xiamen UniversityXiamen361005Fujian ProvinceChina State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing100081China Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-Nano Devices Department of PhysicsRenmin University of ChinaBeijing 100872China School of Optical and Electronic Information Wuhan National Laboratory

Research on two-dimensional(2D) materials has been explosively increasing in last seventeen years in varying subjects including condensed matter physics, electronic engineering, materials science, and chemistry since the mechanical exfoliation of graphene in 2004. Starting from graphene, 2D materials now have become a big family with numerous members and diverse categories. The unique structural features and physicochemical properties of 2D materials make them one class of the most appealing candidates for a wide range of potential applications. In particular, we have seen some major breakthroughs made in the field of 2D materials in last five years not only in developing novel synthetic methods and exploring new structures/properties but also in identifying innovative applications and pushing forward commercialisation. In this review, we provide a critical summary on the recent progress made in the field of 2D materials with a particular focus on last five years. After a brief backgroundintroduction, we first discuss the major synthetic methods for 2D materials, including the mechanical exfoliation, liquid exfoliation, vapor phase deposition, and wet-chemical synthesis as well as phase engineering of 2D materials belonging to the field of phase engineering of nanomaterials(PEN). We then introduce the superconducting/optical/magnetic properties and chirality of 2D materials along with newly emerging magic angle 2D superlattices. Following that, the promising applications of 2D materials in electronics, optoelectronics, catalysis, energy storage, solar cells, biomedicine, sensors, environments, etc. are described sequentially. Thereafter, we present the theoretic calculations and simulations of 2D materials. Finally, after concluding the current progress, we provide some personal discussions on the existing challenges and future outlooks in this rapidly developing field.

关键词： Two-dimensional materials Transition metal dichalcogenides Phase engineering of nanomaterials Electronics Optoelectronics Catalysis Energy storage and conversion

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Model-independent searches of new physics in DARWIN with a semi-supervised deep learning pipeline

arXiv

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arXiv 2024年

作者： Aalbers, J. Abe, K. Adrover, M. Ahmed Maouloud, S. Althueser, L. Amaral, D.W.P. Andrieu, B. Angelino, E. Antón Martin, D. Antunovic, B. Aprile, E. Babicz, M. Bajpai, D. Balzer, M. Barberio, E. Baudis, L. Bazyk, M. Bell, N.F. Bellagamba, L. Biondi, R. Biondi, Y. Bismark, A. Boehm, C. Boese, K. Braun, R. Breskin, A. Brommer, S. Brown, A. Bruni, G. Budnik, R. Cai, C. Capelli, C. Chauvin, A. Cimental Chavez, A.P. Colijn, A.P. Conrad, J. Cuenca-García, J.J. D'Andrea, V. Daniel Garcia, L.C. Decowski, M.P. Deisting, A. Di Donato, C. Di Gangi, P. Diglio, S. Doerenkamp, M. Drexlin, G. Eitel, K. Elykov, A. Engel, R. Ferella, A.D. Ferrari, C. Fischer, H. Flehmke, T. Flierman, M. Fujikawa, K. Fulgione, W. Fuselli, C. Gaemers, P. Gaior, R. Galloway, M. Gao, F. Garroum, N. Giacomobono, R. Girard, F. Glade-Beucke, R. Glück, F. Grandi, L. Grigat, J. Größle, R. Guan, H. Guida, M. Gyorgy, P. Hammann, R. Hannen, V. Hansmann-Menzemer, S. Hargittai, N. Higuera, A. Hils, C. Hiraoka, K. Hoetzsch, L. Hoferichter, M. Hood, N.F. Iacovacci, M. Itow, Y. Jakob, J. James, R.S. Joerg, F. Kahlert, F. Kaminaga, Y. Kara, M. Kavrigin, P. Kazama, S. Keller, M. Kharbanda, P. Kilminster, B. Kleifges, M. Klute, M. Kobayashi, M. Koke, D. Kopec, A. von Krosigk, B. Kuger, F. LaCascio, L. Landsman, H. Lang, R.F. Levinson, L. Li, I. Li, A. Li, S. Liang, S. Liang, Z. Lin, Y.-T. Lindemann, S. Lindner, M. Liu, K. Loizeau, J. Lombardi, F. Long, J. Lopes, J.A.M. Lucchetti, G.M. Luce, T. Ma, Y. Macolino, C. Mahlstedt, J. Maier, B. Mancuso, A. Manenti, L. Marignetti, F. Martens, K. Masbou, J. Masson, E. Mastroianni, S. Melchiorre, A. Menéndez, J. Messina, M. Milosovic, B. Milutinovic, S. Miuchi, K. Miyata, R. Molinario, A. Monteiro, C.M.B. Morå, K. Moriyama, S. Morteau, E. Mosbacher, Y. Müller, J. Murra, M. Newstead, J.L. Ni, K. O'Hare, C. Oberlack, U. Obradovic, M. Ostrowskiy, I. Ouahada, S. Paetsch, B. Pan, Y. Pandurovic, M. Pellegrini, Q. Nikhef The University of Groningen Van Swinderen Institute Groningen9747AG Netherlands University of Tokyo Higashi-Mozumi Kamioka Gifu Hida506-1205 Japan Physik-Institut University of Zürich Zürich8057 Switzerland LPNHE Sorbonne Université CNRS IN2P3 Paris75005 France Institute for Nuclear Physics University of Münster Münster48149 Germany Department of Physics and Astronomy Rice University HoustonTX77005 United States INAF-Astrophysical Observatory of Torino Department of Physics University of Torino INFN-Torino Torino10125 Italy INFN-Laboratori Nazionali del Gran Sasso Gran Sasso Science Institute L'Aquila67100 Italy Department of Physics Enrico Fermi Institute Kavli Institute for Cosmological Physics University of Chicago ChicagoIL60637 United States Vinca Institute of Nuclear Science University of Belgrade Mihajla Petrovica Alasa 12-14 Belgrade Serbia Physics Department Columbia University New YorkNY10027 United States Department of Physics & Astronomy University of Alabama TuscaloosaAL34587-0324 United States Institute for Data Processing and Electronics Karlsruhe Institute of Technology Karlsruhe76021 Germany ARC Centre of Excellence for Dark Matter Particle Physics School of Physics The University of Melbourne VIC3010 Australia SUBATECH IMT Atlantique CNRS IN2P3 Nantes Université Nantes44307 France Department of Physics and Astronomy University of Bologna INFN-Bologna Bologna40126 Italy Max-Planck-Institut für Kernphysik Heidelberg69117 Germany Institute for Astroparticle Physics Karlsruhe Institute of Technology Karlsruhe76021 Germany School of Physics The University of Sydney Camperdown SydneyNSW2006 Australia Department of Particle Physics and Astrophysics Weizmann Institute of Science Rehovot7610001 Israel Institute of Experimental Particle Physics Karlsruhe Institute of Technology Karlsruhe76021 Germany Physikalisches Institut Universität Freiburg Freiburg79104 Germany Department of Physics and

We present a novel deep learning pipeline to perform a model-independent, likelihood-free search for anomalous (i.e., non-background) events in the proposed next generation multi-ton scale liquid Xenon-based direct detection experiment, DARWIN. We train an anomaly detector comprising a variational autoencoder and a classifier on extensive, high-dimensional simulated detector response data and construct a one-dimensional anomaly score optimised to reject the background only hypothesis in the presence of an excess of non-background-like events. We benchmark the procedure with a sensitivity study that determines its power to reject the background-only hypothesis in the presence of an injected WIMP dark matter signal, outperforming the classical, likelihood-based background rejection test. We show that our neural networks learn relevant energy features of the events from low-level, high-dimensional detector outputs, without the need to compress this data into lower-dimensional observables, thus reducing computational effort and information loss. For the future, our approach lays the foundation for an efficient end-to-end pipeline that eliminates the need for many of the corrections and cuts that are traditionally part of the analysis chain, with the potential of achieving higher accuracy and significant reduction of analysis time. Copyright © 2024, The Authors. All rights reserved.

关键词： Self-supervised learning

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Neutrinoless Double Beta Decay Sensitivity of the XLZD Rare Event Observatory

arXiv

引用

arXiv 2024年

作者： Aalbers, J. Abe, K. Adrover, M. Maouloud, S. Ahmed Akerib, D.S. Musalhi, A.K. Al Alder, F. Althueser, L. Amaral, D.W.P. Amarasinghe, C.S. Ames, A. Andrieu, B. Angelides, N. Angelino, E. Antunovic, B. Aprile, E. Araújo, H.M. Armstrong, J.E. Arthurs, M. Babicz, M. Bajpai, D. Baker, A. Balzer, M. Bang, J. Barberio, E. Bargemann, J.W. Barillier, E. Basharina-Freshville, A. Baudis, L. Bauer, D. Bazyk, M. Beattie, K. Beaupere, N. Bell, N.F. Bellagamba, L. Benson, T. Bhatti, A. Biesiadzinski, T.P. Biondi, R. Biondi, Y. Birch, H.J. Bishop, E. Bismark, A. Boehm, C. Boese, K. Bolotnikov, A. Brás, P. Braun, R. Breskin, A. Brew, C.A.J. Brommer, S. Brown, A. Bruni, G. Budnik, R. Burdin, S. Cai, C. Capelli, C. Carini, G. Carmona-Benitez, M.C. Carter, M. Chauvin, A. Chawla, A. Chen, H. Cherwinka, J.J. Chin, Y.T. Chott, N.I. Chavez, A.P. Cimental Clark, K. Colijn, A.P. Colling, D.J. Conrad, J. Converse, M.V. Coronel, R. Costanzo, D. Cottle, A. Cox, G. Cuenca-García, J.J. Curran, D. Cussans, D. D’Andrea, V. Garcia, L.C. Daniel Darlington, I. Dave, S. David, A. Davies, G.J. Decowski, M.P. Deisting, A. Delgaudio, J. Dey, S. Di Donato, C. Di Felice, L. Di Gangi, P. Diglio, S. Ding, C. Dobson, J.E.Y. Doerenkamp, M. Drexlin, G. Druszkiewicz, E. Dunbar, C.L. Eitel, K. Elykov, A. Engel, R. Eriksen, S.R. Fayer, S. Fearon, N.M. Ferella, A.D. Ferrari, C. Fieldhouse, N. Fischer, H. Flaecher, H. Flehmke, T. Flierman, M. Fraser, E.D. Fruth, T.M.A. Fujikawa, K. Fulgione, W. Fuselli, C. Gaemers, P. Gaior, R. Gaitskell, R.J. Gallice, N. Galloway, M. Gao, F. Garroum, N. Geffre, A. Genovesi, J. Ghag, C. Ghosh, S. Giacomobono, R. Gibbons, R. Girard, F. Glade-Beucke, R. Glück, F. Gokhale, S. Grandi, L. Green, J. Grigat, J. van der Grinten, M.G.D. Größle, R. Guan, H. Guida, M. Gyorgy, P. Haiston, J.J. Hall, C.R. Hall, T. Hammann, R. Hannen, V. Hansmann-Menzemer, S. Hargittai, N. Hartigan-O’Connor, E. Haselschwardt, S.J. Hernandez, M. Hertel, S.A. Higuera, A. Hils, C. Nikhef The University of Groningen Van Swinderen Institute Groningen9747AG Netherlands University of Tokyo Higashi-Mozumi Kamioka Gifu Hida506-1205 Japan Physik-Institut University of Zürich Zürich8057 Switzerland LPNHE Sorbonne Université CNRS IN2P3 Paris75005 France SLAC National Accelerator Laboratory Menlo ParkCA94025-7015 United States Kavli Institute for Particle Astrophysics and Cosmology Stanford University StanfordCA94305-4085 United States LondonWC1E 6BT United Kingdom Institute for Nuclear Physics University of Münster Münster48149 Germany Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Physics University of California Santa Barbara Santa BarbaraCA93106-9530 United States Department of Physics Imperial College London Blackett Laboratory LondonSW7 2AZ United Kingdom INAF-Astrophysical Observatory of Torino Department of Physics University of Torino INFN-Torino Torino10125 Italy INFN-Laboratori Nazionali del Gran Sasso Gran Sasso Science Institute L’Aquila67100 Italy Vinca Institute of Nuclear Science University of Belgrade Mihajla Petrovica Alasa 12-14 Belgrade Serbia Physics Department Columbia University New YorkNY10027 United States Department of Physics University of Maryland College ParkMD20742-4111 United States Department of Physics & Astronomy University of Alabama TuscaloosaAL34587-0324 United States Department of Physics King’s College London LondonWC2R 2LS United Kingdom Institute for Data Processing and Electronics Karlsruhe Institute of Technology Karlsruhe76021 Germany Department of Physics Brown University ProvidenceRI02912-9037 United States ARC Centre of Excellence for Dark Matter Particle Physics School of Physics The University ofMelbourne VIC3010 Australia SUBATECH IMT Atlantique CNRS IN2P3 Nantes Université Nantes44307 France BerkeleyCA94720-8099 United States Department of Physics and Astronomy University of Bologna INFN

The XLZD collaboration is developing a two-phase xenon time projection chamber with an active mass of 60 to 80 t capable of probing the remaining WIMP-nucleon interaction parameter space down to the so-called neutrino fog. In this work we show that, based on the performance of currently operating detectors using the same technology and a realistic reduction of radioactivity in detector materials, such an experiment will also be able to competitively search for neutrinoless double beta decay in 136Xe using a natural-abundance xenon target. XLZD can reach a 3σ discovery potential half-life of 5.7×1027 yr (and a 90% CL exclusion of 1.3×1028 yr) with 10 years of data taking, corresponding to a Majorana mass range of 7.3–31.3 meV (4.8–20.5 meV). XLZD will thus exclude the inverted neutrino mass ordering parameter space and will start to probe the normal ordering region for most of the nuclear matrix elements commonly considered by the community. © 2024, CC BY-NC-SA.

关键词： Neutrons

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The XLZD Design Book: Towards the Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics

arXiv

引用

arXiv 2024年

作者： Aalbers, J. Abe, K. Adrover, M. Maouloud, S. Ahmed Akerib, D.S. Al Musalhi, A.K. Alder, F. Althueser, L. Amaral, D.W.P. Amarasinghe, C.S. Ames, A. Andrieu, B. Angelides, N. Angelino, E. Antunovic, B. Aprile, E. Araújo, H.M. Armstrong, J.E. Arthurs, M. Babicz, M. Bajpai, D. Baker, A. Balzer, M. Bang, J. Barberio, E. Bargemann, J.W. Barillier, E. Basharina-Freshville, A. Baudis, L. Bauer, D. Bazyk, M. Beattie, K. Beaupere, N. Bell, N.F. Bellagamba, L. Benson, T. Bhatti, A. Biesiadzinski, T.P. Biondi, R. Biondi, Y. Birch, H.J. Bishop, E. Bismark, A. Boehm, C. Boese, K. Bolotnikov, A. Brás, P. Braun, R. Breskin, A. Brew, C.A.J. Brommer, S. Brown, A. Bruni, G. Budnik, R. Burdin, S. Cai, C. Capelli, C. Carini, G. Carmona-Benitez, M.C. Carter, M. Chauvin, A. Chawla, A. Chen, H. Cherwinka, J.J. Chin, Y.T. Chott, N.I. Chavez, A.P. Cimental Clark, K. Colijn, A.P. Colling, D.J. Conrad, J. Converse, M.V. Coronel, R. Costanzo, D. Cottle, A. Cox, G. Cuenca-García, J.J. Curran, D. Cussans, D. D’Andrea, V. Garcia, L.C. Daniel Darlington, I. Dave, S. David, A. Davies, G.J. Decowski, M.P. Deisting, A. Delgaudio, J. Dey, S. Di Donato, C. Di Felice, L. Di Gangi, P. Diglio, S. Ding, C. Dobson, J.E.Y. Doerenkamp, M. Drexlin, G. Druszkiewicz, E. Dunbar, C.L. Eitel, K. Elykov, A. Engel, R. Eriksen, S.R. Fayer, S. Fearon, N.M. Ferella, A.D. Ferrari, C. Fieldhouse, N. Fischer, H. Flaecher, H. Flehmke, T. Flierman, M. Fraser, E.D. Fruth, T.M.A. Fujikawa, K. Fulgione, W. Fuselli, C. Gaemers, P. Gaior, R. Gaitskell, R.J. Gallice, N. Galloway, M. Gao, F. Garroum, N. Geffre, A. Genovesi, J. Ghag, C. Ghosh, S. Giacomobono, R. Gibbons, R. Girard, F. Glade-Beucke, R. Glück, F. Gokhale, S. Grandi, L. Green, J. Grigat, J. van der Grinten, M.G.D. Größle, R. Guan, H. Guida, M. Gyorgy, P. Haiston, J.J. Hall, C.R. Hall, T. Hammann, R. Hannen, V. Hansmann-Menzemer, S. Hargittai, N. Hartigan-O’Connor, E. Haselschwardt, S.J. Hernandez, M. Hertel, S.A. Higuera, A. Hils, C. Nikhef the University of Groningen Van Swinderen Institute Groningen9747AG Netherlands University of Tokyo Higashi-Mozumi Kamioka Hida Gifu506-1205 Japan Physik-Institut University of Zürich Zürich8057 Switzerland LPNHE Sorbonne Université CNRS IN2P3 Paris75005 France SLAC National Accelerator Laboratory Menlo ParkCA94025-7015 United States Kavli Institute for Particle Astrophysics and Cosmology Stanford University StanfordCA94305-4085 United States LondonWC1E 6BT United Kingdom Institute for Nuclear Physics University of Münster Münster48149 Germany Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Physics University of California Santa Barbara Santa BarbaraCA93106-9530 United States Department of Physics Imperial College London Blackett Laboratory LondonSW7 2AZ United Kingdom INAF-Astrophysical Observatory of Torino Department of Physics University of Torino INFN-Torino Torino10125 Italy INFN-Laboratori Nazionali del Gran Sasso Gran Sasso Science Institute L’Aquila67100 Italy Vinca Institute of Nuclear Science University of Belgrade Mihajla Petrovica Alasa 12-14 Belgrade Serbia Physics Department Columbia University New YorkNY10027 United States Department of Physics University of Maryland College ParkMD20742-4111 United States Department of Physics & Astronomy University of Alabama TuscaloosaAL34587-0324 United States Department of Physics King’s College London LondonWC2R 2LS United Kingdom Institute for Data Processing and Electronics Karlsruhe Institute of Technology Karlsruhe76021 Germany Department of Physics Brown University ProvidenceRI02912-9037 United States ARC Centre of Excellence for Dark Matter Particle Physics School of Physics The University of Melbourne VIC3010 Australia SUBATECH IMT Atlantique CNRS IN2P3 Nantes Université Nantes44307 France BerkeleyCA94720-8099 United States Department of Physics and Astronomy University of Bologna INF

This report describes the experimental strategy and technologies for a next-generation xenon observatory sensitive to dark matter and neutrino physics. The detector will have an active liquid xenon target mass of 60–80 tonnes and is proposed by the XENON-LUX-ZEPLIN-DARWIN (XLZD) collaboration. The design is based on the mature liquid xenon time projection chamber technology of the current-generation experiments, LZ and XENONnT. A baseline design and opportunities for further optimization of the individual detector components are discussed. The experiment envisaged here has the capability to explore parameter space for Weakly Interacting Massive particle (WIMP) dark matter down to the neutrino fog, with a 3σ evidence potential for spin-independent WIMP-nucleon cross sections as low as 3 × 10−49 cm2 (at 40 GeV/c2 WIMP mass). The observatory is also projected to have a 3σ observation potential of neutrinoless double-beta decay of 136Xe at a half-life of up to 5.7 × 1027 years. Additionally, it is sensitive to astrophysical neutrinos from the atmosphere, sun, and galactic supernovae. Copyright © 2024, The Authors. All rights reserved.

关键词： Dark Matter

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First Constraints on General Neutrino Interactions Based on KATRIN Data

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Physical Review Letters 2025年第25期134卷 251801-251801页

作者： M. Aker D. Batzler A. Beglarian J. Beisenkötter M. Biassoni B. Bieringer Y. Biondi F. Block B. Bornschein L. Bornschein M. Böttcher M. Carminati A. Chatrabhuti S. Chilingaryan B. A. Daniel M. Descher D. Díaz Barrero P. J. Doe O. Dragoun G. Drexlin F. Edzards K. Eitel E. Ellinger R. Engel S. Enomoto A. Felden C. Fengler C. Fiorini J. A. Formaggio C. Forstner F. M. Fränkle G. Gagliardi K. Gauda A. S. Gavin W. Gil F. Glück R. Grössle N. Gutknecht V. Hannen L. Hasselmann K. Helbing H. Henke S. Heyns R. Hiller D. Hillesheimer D. Hinz T. Höhn A. Huber A. Jansen K. Khosonthongkee C. Köhler L. Köllenberger A. Kopmann N. Kovač L. La Cascio T. Lasserre J. Lauer T. L. Le O. Lebeda B. Lehnert G. Li A. Lokhov M. Machatschek M. Mark A. Marsteller K. McMichael C. Melzer S. Mertens S. Mohanty J. Mostafa K. Müller A. Nava H. Neumann S. Niemes A. Onillon D. S. Parno M. Pavan U. Pinsook A. W. P. Poon J. M. L. Poyato F. Priester J. Ráliš S. Ramachandran R. G. H. Robertson C. Rodenbeck M. Röllig R. Sack A. Saenz R. Salomon P. Schäfer K. Schlösser M. Schlösser L. Schlüter S. Schneidewind M. Schrank J. Schürmann A. K. Schütz A. Schwemmer A. Schwenck J. Seeyangnok M. Šefčík D. Siegmann F. Simon J. Songwadhana F. Spanier D. Spreng W. Sreethawong M. Steidl J. Štorek X. Stribl M. Sturm N. Suwonjandee N. Tan Jerome H. H. Telle L. A. Thorne T. Thümmler N. Titov I. Tkachev K. Urban K. Valerius D. Vénos C. Weinheimer S. Welte J. Wendel M. Wetter C. Wiesinger J. F. Wilkerson J. Wolf S. Wüstling J. Wydra W. Xu S. Zadorozhny G. Zeller Institute for Astroparticle Physics (IAP) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Institute for Data Processing and Electronics (IPE) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Institute for Nuclear Physics University of Münster Wilhelm-Klemm-Straße 9 48149 Münster Germany Istituto Nazionale di Fisica Nucleare (INFN)—Sezione di Milano-Bicocca Piazza della Scienza 3 20126 Milano Italy Politecnico di Milano Dipartimento di Elettronica Informazione e Bioingegneria Piazza Leonardo da Vinci 32 20133 Milano Italy Istituto Nazionale di Fisica Nucleare (INFN)—Sezione di Milano Via Celoria 16 20133 Milano Italy Department of Physics Faculty of Science Chulalongkorn University Bangkok 10330 Thailand Department of Physics Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Institute of Experimental Particle Physics (ETP) Karlsruhe Institute of Technology (KIT) Wolfgang-Gaede-Straße 1 76131 Karlsruhe Germany Center for Experimental Nuclear Physics and Astrophysics and Dept. of Physics University of Washington Seattle Washington 98195 USA Nuclear Physics Institute Czech Academy of Sciences 25068 Řež Czech Republic Technical University of Munich TUM School of Natural Sciences Physics Department James-Franck-Straße 1 85748 Garching Germany Max Planck Institute for Physics Boltzmannstr. 8 85748 Garching Germany Department of Physics Faculty of Mathematics and Natural Sciences University of Wuppertal Gaußstraße 20 42119 Wuppertal Germany Laboratory for Nuclear Science Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge Massachusetts 02139 USA Dipartimento di Fisica Università di Milano - Bicocca Piazza della Scienza 3 20126 Milano Italy Department of Physics and Astronomy University of North Carolina Chapel Hill North Carolina 27599 USA Triangle Universities Nuclear Laboratory Durham North Carolina

The precision measurement of the tritium β-decay spectrum performed by the KATRIN experiment provides a unique way to search for general neutrino interactions (GNIs). All theoretically allowed GNI terms at dimension 6 involving neutrinos are incorporated into a low-energy effective field theory, and can be identified by specific signatures in the measured tritium β spectrum. In this Letter an effective description of the impact of GNIs on the β spectrum is formulated and the first constraints on the effective GNI parameters are derived based on the 4×106 electrons collected in the second measurement campaign of KATRIN in 2019. In addition, constraints on selected types of interactions are investigated, thereby exploring the potential of KATRIN to search for more specific new physics cases, including a right-handed W boson, a charged Higgs boson, or leptoquarks.

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A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics

arXiv

引用

arXiv 2022年

作者： Aalbers, J. Abe, K. Aerne, V. Agostini, F. Ahmed Maouloud, S. Akerib, D.S. Akimov, D.Yu. Akshat, J. Al Musalhi, A.K. Alder, F. Alsum, S.K. Althueser, L. Amarasinghe, C.S. Amaro, F.D. Ames, A. Anderson, T.J. Andrieu, B. Angelides, N. Angelino, E. Angevaare, J. Antochi, V.C. Antón Martin, D. Antunovic, B. Aprile, E. Araújo, H.M. Armstrong, J.E. Arneodo, F. Arthurs, M. Asadi, P. Baek, S. Bai, X. Bajpai, D. Baker, A. Balajthy, J. Balashov, S. Balzer, M. Bandyopadhyay, A. Bang, J. Barberio, E. Bargemann, J.W. Baudis, L. Bauer, D. Baur, D. Baxter, A. Baxter, A.L. Bazyk, M. Beattie, K. Behrens, J. Bell, N.F. Bellagamba, L. Beltrame, P. Benabderrahmane, M. Bernard, E.P. Bertone, G.F. Bhattacharjee, P. Bhatti, A. Biekert, A. Biesiadzinski, T.P. Binau, A.R. Biondi, R. Biondi, Y. Birch, H.J. Bishara, F. Bismark, A. Blanco, C. Blockinger, G.M. Bodnia, E. Boehm, C. Bolozdynya, A.I. Bolton, P.D. Bottaro, S. Bourgeois, C. Boxer, B. Brás, P. Breskin, A. Breur, P.A. Brew, C.A.J. Brod, J. Brookes, E. Brown, A. Brown, E. Bruenner, S. Bruno, G. Budnik, R. Bui, T.K. Burdin, S. Buse, S. Busenitz, J.K. Buttazzo, D. Buuck, M. Buzulutskov, A. Cabrita, R. Cai, C. Cai, D. Capelli, C. Cardoso, J.M.R. Carmona-Benitez, M.C. Cascella, M. Catena, R. Chakraborty, S. Chan, C. Chang, S. Chauvin, A. Chawla, A. Chen, H. Chepel, V. Chott, N.I. Cichon, D. Cimental Chavez, A. Cimmino, B. Clark, M. Co, R.T. Colijn, A.P. Conrad, J. Converse, M.V. Costa, M. Cottle, A. Cox, G. Creaner, O. Cuenca Garcia, J.J. Cussonneau, J.P. Cutter, J.E. Dahl, C.E. D'Andrea, V. David, A. Decowski, M.P. Dent, J.B. Deppisch, F.F. de Viveiros, L. Di Gangi, P. Di Giovanni, A. Di Pede, S. Dierle, J. Diglio, S. Dobson, J.E.Y. Doerenkamp, M. Douillet, D. Drexlin, G. Druszkiewicz, E. Dunsky, D. Eitel, K. Elykov, A. Emken, T. Engel, R. Eriksen, S.R. Fairbairn, M. Fan, A. Fan, J.J. Farrell, S.J. Fayer, S. Fearon, N.M. Ferella, A. Ferrari, C. Fieguth, A. Fieguth, A. Fiorucci, S. SLAC National Accelerator Laboratory Menlo ParkCA94025 United States Kavli Institute for Particle Astrophysics and Cosmology Stanford University StanfordCA94305 United States Kamioka Observatory Institute for Cosmic Ray Research The University of Tokyo Higashi-Mozumi Kamioka Hida Gifu506-1205 Japan The University of Tokyo Kashiwa Chiba277-8582 Japan Physik-Institut University of Zurich Zurich8057 Switzerland Department of Physics and Astronomy University of Bologna INFN-Bologna Bologna40126 Italy LPNHE Sorbonne Université CNRS IN2P3 Paris75005 France Moscow115409 Russia Department of Physics and Astronomy Purdue University West LafayetteIN47907 United States Department of Physics University of Oxford Keble Rd OxfordOX1 3RH United Kingdom Department of Physics and Astronomy University College London LondonWC1E 6BT United Kingdom Department of Physics University of Wisconsin-Madison MadisonWI53706 United States Institut für Kernphysik Westfälische Wilhelms-Universität Münster Münster48149 Germany University of Michigan Randall Laboratory of Physics Ann ArborMI48109 United States LIBPhys Department of Physics University of Coimbra Coimbra3004-516 Portugal Department of Physics Blackett Laboratory Imperial College London LondonSW7 2BW United Kingdom INAF-Astrophysical Observatory of Torino Department of Physics University of Torino INFN-Torino Torino10125 Italy Nikhef The University of Amsterdam Science Park Amsterdam1098XG Netherlands Oskar Klein Centre Department of Physics Stockholm University AlbaNova StockholmSE-10691 Sweden Department of Physics Kavli Institute for Cosmological Physics The University of Chicago ChicagoIL60637 United States Vinca Institute of Nuclear Science University of Belgrade Mihajla Petrovica Alasa 12-14 Belgrade Serbia Faculty of Architecture Civil Engineering and Geodesy University of Banja Luka Bulevar vojvode Petra Bojovica 1a Banja Luka78000 Bosnia and Herzegovina Physics D

The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for Weakly Interacting Massive particles (WIMPs), while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neutrinos through neutrinoless double-beta decay and through a variety of astrophysical sources. A next-generation xenon-based detector will therefore be a true multi-purpose observatory to significantly advance particle physics, nuclear physics, astrophysics, solar physics, and cosmology. This review article presents the science cases for such a detector. © 2022, CC BY.

关键词： Dark Matter

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A Hollow Multi‐Shelled Structure for Charge Transport and Active Sites in Lithium‐Ion Capacitors

引用

Angewandte Chemie 2020年第12期132卷

作者： Ruyi Bi Nan Xu Hao Ren Nailiang Yang Yonggang Sun Anmin Cao Ranbo Yu Dan Wang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing No. 30 Xueyuan Road Haidian District Beijing 100083 P. R. China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences 1 North 2nd Street Zhongguancun Haidian District Beijing 100190 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China Laboratory of Material Processing and Mold Ministry of Education Zhengzhou University Zhengzhou 450001 P. R. China

The lithium‐ion capacitor (LIC) has attracted tremendous research interest because it meets both the requirement on high energy and power densities. The balance between effective surface areas and mass transport is highly desired to fabricate the optimized electrode material for LIC. Now, triple‐shelled (3S) Nb 2 O 5 hollow multi‐shelled structures (HoMSs) were synthesized for the first time through the sequential templating approach and then applied for the anode of LIC. The unique structure of HoMSs, such as large efficient surface area, hierarchical pores, and multiple shells, provides abundant reaction sites, decreases the electron transport resistance, and increases the diffusion rate for ion transport. In this case, the best combination performance has been achieved among all the reported Nb 2 O 5 ‐based materials, which delivered an excellent energy and power densities simultaneously, and superb cycling stability.

关键词： Hohle Strukturen Lithium-Ionen-Kondensatoren Mehrlagige Strukturen Nb2O5

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Test of lepton flavor universality using B0 → D∗−τ+ντ decays with hadronic τ channels

arXiv

引用

arXiv 2023年

作者： Aaij, R. Abdelmotteleb, A.S.W. Abellan Beteta, C. Abudinén, F. Ackernley, T. Adeva, B. Adinolfi, M. Adlarson, P. Afsharnia, H. Agapopoulou, C. Aidala, C.A. Ajaltouni, Z. Akar, S. Akiba, K. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Alvarez Cartelle, P. Amalric, R. Amato, S. Amey, J.L. Amhis, Y. An, L. Anderlini, L. Andersson, M. Andreianov, A. Andreotti, M. Andreou, D. Ao, D. Archilli, F. Artamonov, A. Artuso, M. Aslanides, E. Atzeni, M. Audurier, B. Bachiller Perea, I.B. Bachmann, S. Bachmayer, M. Back, J.J. Bailly-Reyre, A. Baladron Rodriguez, P. Balagura, V. Baldini, W. Baptista de Souza Leite, J. Barbetti, M. Barlow, R.J. Barsuk, S. Barter, W. Bartolini, M. Baryshnikov, F. Basels, J.M. Bassi, G. Batsukh, B. Battig, A. Bay, A. Beck, A. Becker, M. Bedeschi, F. Bediaga, I.B. Beiter, A. Belin, S. Bellee, V. Belous, K. Belov, I. Belyaev, I. Benane, G. Bencivenni, G. Ben-Haim, E. Berezhnoy, A. Bernet, R. Bernet Andres, S. Berninghoff, D. Bernstein, H.C. Bertella, C. Bertolin, A. Betancourt, C. Betti, F. Bezshyiko, Ia. Bhom, J. Bian, L. Bieker, M.S. Biesuz, N.V. Billoir, P. Biolchini, A. Birch, M. Bishop, F.C.R. Bitadze, A. Blago, M.P. Blake, T. Blanc, F. Blank, J.E. Blusk, S. Bobulska, D. Bocharnikov, V.B. Boelhauve, J.A. Boente Garcia, O. Boettcher, T. Boldyrev, A. Bolognani, C.S. Bolzonella, R. Bondar, N. Borgato, F. Borghi, S. Borsato, M. Borsuk, J.T. Bouchiba, S.A. Bowcock, T.J.V. Boyer, A. Bozzi, C. Bradley, M.J. Braun, S. Brea Rodriguez, A. Breer, N. Brodzicka, J. Brossa Gonzalo, A. Brown, J. Brundu, D. Buonaura, A. Buonincontri, L. Burke, A.T. Burr, C. Bursche, A. Butkevich, A. Butter, J.S. Buytaert, J. Byczynski, W. Cadeddu, S. Cai, H. Calabrese, R. Calefice, L. Cali, S. Calvi, M. Calvo Gomez, M. Campana, P. Campora Perez, D.H. Campoverde Quezada, A.F. Capelli, S. Capriotti, L. Carbone, A. Cardinale, R. Cardini, A. Carniti, P. Carus, L. Casais Vidal, A. Caspary, R. Casse, G. Cattaneo, M. Cavallero, G. Rio de Janeiro Brazil Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University Beijing China Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Institute of Particle Physics Central China Normal University Hubei Wuhan China Université Savoie Mont Blanc CNRS IN2P3 LAPP Annecy France Université Clermont Auvergne CNRS IN2P3 LPC Clermont-Ferrand France Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Université Paris-Saclay CNRS IN2P3 IJCLab Orsay France Laboratoire Leprince-Ringuet CNRS IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Palaiseau France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland INFN Sezione di Bari Bari Italy INFN Sezione di Bologna Bologna Italy INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy INFN Sezione di Milano Milano Italy INFN Sezione di Milano-Bicocca Milano Italy INFN Sezione di Cagliari Monserrato Italy Università degli Studi di Padova Università e INFN Padova Padova Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma La Sapienza Roma Italy INFN Sezione di Roma Tor Vergata Roma Italy Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics VU University Amsterdam Amsterdam Netherlands AGH - University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland Henryk Niewodniczanski Institute of Nuclear Ph

The branching fraction B(B0 → D∗−τ+ντ) is measured relative to that of the normalization mode B0 → D∗−π+π−π+ using hadronic τ+ → π+π−π+(π0)ντ decays in proton-proton collision data at a center-of-mass energy of 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 2 fb−1. The measured ratio is B(B0 → D∗−τ+ντ)/B(B0 → D∗−π+π−π+) = 1.79 ± 0.11 ± 0.11, where the first uncertainty is statistical and the second is related to systematic effects. Using established branching fractions for the B0 → D∗−π+π−π+ and B0 → D∗−µ+νµ modes, the lepton universality test, R(D∗−) ≡ B(B0 → D∗−τ+ντ)/B(B0 → D∗−µ+νµ) is calculated, (Equation presented), where the third uncertainty is due to the uncertainties on the external branching fractions. This result is consistent with the Standard Model prediction and with previous measurements. © 2023, CC BY.

关键词： Tellurium compounds

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Study of charmonium decays to (Equation presented) in the (Equation presented) channels

arXiv

引用

arXiv 2023年

作者： Aaij, R. Abdelmotteleb, A.S.W. Abellan Beteta, C. Abudinén, F. Ackernley, T. Adeva, B. Adinolfi, M. Adlarson, P. Afsharnia, H. Agapopoulou, C. Aidala, C.A. Ajaltouni, Z. Akar, S. Akiba, K. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Alvarez Cartelle, P. Amalric, R. Amato, S. Amey, J.L. Amhis, Y. An, L. Anderlini, L. Andersson, M. Andreianov, A. Andreotti, M. Andreou, D. Ao, D. Archilli, F. Artamonov, A. Artuso, M. Aslanides, E. Atzeni, M. Audurier, B. Bachiller Perea, I.B. Bachmann, S. Bachmayer, M. Back, J.J. Bailly-Reyre, A. Baladron Rodriguez, P. Balagura, V. Baldini, W. Baptista de Souza Leite, J. Barbetti, M. Barlow, R.J. Barsuk, S. Barter, W. Bartolini, M. Baryshnikov, F. Basels, J.M. Bassi, G. Batsukh, B. Battig, A. Bay, A. Beck, A. Becker, M. Bedeschi, F. Bediaga, I.B. Beiter, A. Belin, S. Bellee, V. Belous, K. Belov, I. Belyaev, I. Benane, G. Bencivenni, G. Ben-Haim, E. Berezhnoy, A. Bernet, R. Bernet Andres, S. Berninghoff, D. Bernstein, H.C. Bertella, C. Bertolin, A. Betancourt, C. Betti, F. Bezshyiko, Ia. Bhom, J. Bian, L. Bieker, M.S. Biesuz, N.V. Billoir, P. Biolchini, A. Birch, M. Bishop, F.C.R. Bitadze, A. Blago, M.P. Blake, T. Blanc, F. Blank, J.E. Blusk, S. Bobulska, D. Bocharnikov, V.B. Boelhauve, J.A. Boente Garcia, O. Boettcher, T. Boldyrev, A. Bolognani, C.S. Bolzonella, R. Bondar, N. Borgato, F. Borghi, S. Borsato, M. Borsuk, J.T. Bouchiba, S.A. Bowcock, T.J.V. Boyer, A. Bozzi, C. Bradley, M.J. Braun, S. Brea Rodriguez, A. Breer, N. Brodzicka, J. Brossa Gonzalo, A. Brown, J. Brundu, D. Buonaura, A. Buonincontri, L. Burke, A.T. Burr, C. Bursche, A. Butkevich, A. Butter, J.S. Buytaert, J. Byczynski, W. Cadeddu, S. Cai, H. Calabrese, R. Calefice, L. Cali, S. Calvi, M. Calvo Gomez, M. Campana, P. Campora Perez, D.H. Campoverde Quezada, A.F. Capelli, S. Capriotti, L. Carbone, A. Cardinale, R. Cardini, A. Carniti, P. Carus, L. Casais Vidal, A. Caspary, R. Casse, G. Cattaneo, M. Cavallero, G. Rio de Janeiro Brazil Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University Beijing China Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Institute of Particle Physics Central China Normal University Hubei Wuhan China Université Savoie Mont Blanc CNRS IN2P3-LAPP Annecy France Université Clermont Auvergne CNRS IN2P3 LPC Clermont-Ferrand France Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Université Paris-Saclay CNRS IN2P3 IJCLab Orsay France Laboratoire Leprince-Ringuet CNRS IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Palaiseau France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland INFN Sezione di Bari Bari Italy INFN Sezione di Bologna Bologna Italy INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy INFN Sezione di Milano Milano Italy INFN Sezione di Milano-Bicocca Milano Italy INFN Sezione di Cagliari Monserrato Italy Università degli Studi di Padova Università e INFN Padova Padova Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma La Sapienza Roma Italy INFN Sezione di Roma Tor Vergata Roma Italy Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics VU University Amsterdam Amsterdam Netherlands AGH - University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland Henryk Niewodniczanski Institute of Nuclear Phys

A study of the (Equation presented) and (Equation presented) decays is performed using proton-proton collisions at center-of-mass energies of 7, 8 and 13 TeV at the LHCb experiment. The (Equation presented) invariant mass spectra from both decay modes reveal a rich content of charmonium resonances. New precise measurements of the ηc and ηc(2S) resonance parameters are performed and branching fraction measurements are obtained for B+ decays to ηc, J/ψ, ηc(2S) and χc1 resonances. In particular, the first observation and branching fraction measurement of (Equation presented) is reported as well as first measurements of the (Equation presented) and (Equation presented) branching fractions. Dalitz plot analyses of (Equation presented) and (Equation presented) decays are performed. A new measurement of the amplitude and phase of the Kπ S-wave as functions of the Kπ mass is performed, together with measurements of the (Equation presented)(1950) and a0(1700) parameters. Finally, the branching fractions of χc1 decays to K∗ resonances are also measured. © 2023, CC BY.

关键词： Mass spectrometry

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Search for (Equation presented) in (Equation presented) decays

arXiv

引用

arXiv 2023年

作者： Aaij, R. Abdelmotteleb, A.S.W. Abellan Beteta, C. Abudinén, F. Ackernley, T. Adeva, B. Adinolfi, M. Adlarson, P. Afsharnia, H. Agapopoulou, C. Aidala, C.A. Ajaltouni, Z. Akar, S. Akiba, K. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Alvarez Cartelle, P. Amalric, R. Amato, S. Amey, J.L. Amhis, Y. An, L. Anderlini, L. Andersson, M. Andreianov, A. Andreotti, M. Andreou, D. Ao, D. Archilli, F. Artamonov, A. Artuso, M. Aslanides, E. Atzeni, M. Audurier, B. Bachiller Perea, I.B. Bachmann, S. Bachmayer, M. Back, J.J. Bailly-Reyre, A. Baladron Rodriguez, P. Balagura, V. Baldini, W. Baptista de Souza Leite, J. Barbetti, M. Barbosa, I.R. Barlow, R.J. Barsuk, S. Barter, W. Bartolini, M. Baryshnikov, F. Basels, J.M. Bassi, G. Batsukh, B. Battig, A. Bay, A. Beck, A. Becker, M. Bedeschi, F. Bediaga, I.B. Beiter, A. Belin, S. Bellee, V. Belous, K. Belov, I. Belyaev, I. Benane, G. Bencivenni, G. Ben-Haim, E. Berezhnoy, A. Bernet, R. Bernet Andres, S. Berninghoff, D. Bernstein, H.C. Bertella, C. Bertolin, A. Betancourt, C. Betti, F. Bezshyiko, Ia. Bhom, J. Bian, L. Bieker, M.S. Biesuz, N.V. Billoir, P. Biolchini, A. Birch, M. Bishop, F.C.R. Bitadze, A. Bizzeti, A. Blago, M.P. Blake, T. Blanc, F. Blank, J.E. Blusk, S. Bobulska, D. Bocharnikov, V.B. Boelhauve, J.A. Boente Garcia, O. Boettcher, T. Boldyrev, A. Bolognani, C.S. Bolzonella, R. Bondar, N. Borgato, F. Borghi, S. Borsato, M. Borsuk, J.T. Bouchiba, S.A. Bowcock, T.J.V. Boyer, A. Bozzi, C. Bradley, M.J. Braun, S. Brea Rodriguez, A. Breer, N. Brodzicka, J. Brossa Gonzalo, A. Brown, J. Brundu, D. Buonaura, A. Buonincontri, L. Burke, A.T. Burr, C. Bursche, A. Butkevich, A. Butter, J.S. Buytaert, J. Byczynski, W. Cadeddu, S. Cai, H. Calabrese, R. Calefice, L. Cali, S. Calvi, M. Calvo Gomez, M. Campana, P. Campora Perez, D.H. Campoverde Quezada, A.F. Capelli, S. Capriotti, L. Carbone, A. Cardinale, R. Cardini, A. Carniti, P. Carus, L. Casais Vidal, A. Caspary, R. Casse, G. Cattaneo, M. Rio de Janeiro Brazil Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University Beijing China Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Institute of Particle Physics Central China Normal University Hubei Wuhan China Université Savoie Mont Blanc CNRS IN2P3-LAPP Annecy France Université Clermont Auvergne CNRS IN2P3 LPC Clermont-Ferrand France Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Université Paris-Saclay CNRS IN2P3 IJCLab Orsay France Laboratoire Leprince-Ringuet CNRS IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Palaiseau France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland INFN Sezione di Bari Bari Italy INFN Sezione di Bologna Bologna Italy INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy INFN Sezione di Milano Milano Italy INFN Sezione di Milano-Bicocca Milano Italy INFN Sezione di Cagliari Monserrato Italy Università degli Studi di Padova Università e INFN Padova Padova Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma La Sapienza Roma Italy INFN Sezione di Roma Tor Vergata Roma Italy Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics VU University Amsterdam Amsterdam Netherlands AGH - University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland Henryk Niewodniczanski Institute of Nuclear Phys

The very rare (Equation presented) decay is searched for by analysing B− → π−µ+µ− decays. The analysis uses a sample of beauty mesons produced in proton-proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb−1. The signal signature corresponds to simultaneous peaks in the µ+µ− and π−µ+µ− invariant masses. No evidence for an excess of events over background is observed and an upper limit is set on the branching fraction of the decay at (Equation presented) at 90% confidence level. This is the first limit on the branching fraction of (Equation presented) decays and the most stringent limit on (Equation presented) decays to leptonic final states. The analysis is the first search for a rare charm-meson decay exploiting production via beauty decays. © 2023, CC BY.

关键词： Bosons

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