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Search for Time-Dependent CP Violation in D0→π+π−π0 Decays

Physical Review Letters 2024年第10期133卷 101803页

作者： R. Aaij A. S. W. Abdelmotteleb C. Abellan Beteta F. Abudinén T. Ackernley A. A. Adefisoye B. Adeva M. Adinolfi P. Adlarson C. Agapopoulou C. A. Aidala Z. Ajaltouni S. Akar K. Akiba P. Albicocco J. Albrecht F. Alessio M. Alexander Z. Aliouche P. Alvarez Cartelle R. Amalric S. Amato J. L. Amey Y. Amhis L. An L. Anderlini M. Andersson A. Andreianov P. Andreola M. Andreotti D. Andreou A. Anelli D. Ao F. Archilli M. Argenton S. Arguedas Cuendis A. Artamonov M. Artuso E. Aslanides M. Atzeni B. Audurier D. Bacher I. Bachiller Perea S. Bachmann M. Bachmayer J. J. Back P. Baladron Rodriguez V. Balagura W. Baldini H. Bao J. Baptista de Souza Leite M. Barbetti I. R. Barbosa R. J. Barlow M. Barnyakov S. Barsuk W. Barter M. Bartolini J. Bartz F. Baryshnikov J. M. Basels G. Bassi B. Batsukh A. Battig A. Bay A. Beck M. Becker F. Bedeschi I. B. Bediaga S. Belin V. Bellee K. Belous I. Belov I. Belyaev G. Benane G. Bencivenni E. Ben-Haim A. Berezhnoy R. Bernet S. Bernet Andres A. Bertolin C. Betancourt F. Betti J. Bex Ia. Bezshyiko J. Bhom M. S. Bieker N. V. Biesuz P. Billoir A. Biolchini M. Birch F. C. R. Bishop A. Bitadze A. Bizzeti T. Blake F. Blanc J. E. Blank S. Blusk V. Bocharnikov J. A. Boelhauve O. Boente Garcia T. Boettcher A. Bohare A. Boldyrev C. S. Bolognani R. Bolzonella N. Bondar F. Borgato S. Borghi M. Borsato J. T. Borsuk S. A. Bouchiba T. J. V. Bowcock A. Boyer C. Bozzi M. J. Bradley A. Brea Rodriguez N. Breer J. Brodzicka A. Brossa Gonzalo J. Brown D. Brundu E. Buchanan A. Buonaura L. Buonincontri A. T. Burke C. Burr A. Butkevich J. S. Butter J. Buytaert W. Byczynski S. Cadeddu H. Cai R. Calabrese S. Calderon Ramirez L. Calefice S. Cali M. Calvi M. Calvo Gomez P. Camargo Magalhaes J. I. Cambon Bouzas P. Campana D. H. Campora Perez A. F. Campoverde Quezada S. Capelli L. Capriotti R. Caravaca-Mora A. Carbone L. Carcedo Salgado R. Cardinale A. Cardini P. Carniti L. Carus A. Casais Vidal R. Caspary G. Casse J. Castro Godinez M. Cattaneo G. Cavallero V. Cavallini S. Celani D. Cervenkov S. Cesare A. J. Chadwick I. Chah Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Department of Physics University of Warwick Coventry United Kingdom Physik-Institut Universität Zürich Zürich Switzerland Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Syracuse University Syracuse New York USA Instituto Galego de Física de Altas Enerxías (IGFAE) Universidade de Santiago de Compostela Santiago de Compostela Spain H.H. Wills Physics Laboratory University of Bristol Bristol United Kingdom Department of Physics and Astronomy Uppsala University Uppsala Sweden (associated with School of Physics and Astronomy Geneva Switzerland University of Michigan Ann Arbor Michigan USA (associated with Syracuse University Syracuse New York USA) Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France University of Cincinnati Cincinnati Ohio USA INFN Laboratori Nazionali di Frascati Frascati Italy Fakultät Physik Technische Universität Dortmund Dortmund Germany School of Physics and Astronomy Department of Physics and Astronomy University of Manchester Manchester United Kingdom Cavendish Laboratory University of Cambridge Cambridge United Kingdom LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS/IN2P3 Paris France Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Université Paris-Saclay CNRS/IN2P3 IJCLab Orsay France School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China INFN Sezione di Firenze Firenze Italy Affiliated with an institute covered by a cooperation agreement with CERN INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Milano-Bicocca Milano Italy University of Chinese Academy of Sciences Beijing China INFN Sezione di Roma Tor Vergata Roma Italy Consejo Nacional de Rectores (CONARE) San Jose Costa Rica Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France Massachusetts Institute of Technology Cambridge Massachusetts USA Laboratoire Le

A measurement of time-dependent CP violation in D0→π+π−π0 decays using a pp collision data sample collected by the LHCb experiment in 2012 and from 2015 to 2018, corresponding to an integrated luminosity of 7.7 fb−1, is presented. The initial flavor of each D0 candidate is determined from the charge of the pion produced in the D*(2010)+→D0π+ decay. The decay D0→K−π+π0 is used as a control channel to validate the measurement procedure. The gradient of the time-dependent CP asymmetry ΔY in D0→π+π−π0 decays is measured to be ΔY=(−1.3±6.3±2.4)×10−4, where the first uncertainty is statistical and the second is systematic, which is compatible with CP conservation.

关键词： Electroweak interaction Charm quark Charmed mesons CP violation

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Detecting electron-phonon coupling during photoinduced phase transition

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Physical Review B 2021年第12期103卷 L121105-L121105页

作者： Takeshi Suzuki Yasushi Shinohara Yangfan Lu Mari Watanabe Jiadi Xu Kenichi L. Ishikawa Hide Takagi Minoru Nohara Naoyuki Katayama Hiroshi Sawa Masami Fujisawa Teruto Kanai Jiro Itatani Takashi Mizokawa Shik Shin Kozo Okazaki Institute for Solid State Physics The University of Tokyo Kashiwa Chiba 277-8581 Japan Photon Science Center Graduate School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan Department of Nuclear Engineering and Management Graduate School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan Department of Physics University of Tokyo Hongo Tokyo 113-0033 Japan Research Institute for Photon Science and Laser Technology The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Max Planck Institute for Solid State Research Heisenbergstrasse 1 70569 Stuttgart Germany Research Institute for Interdisciplinary Science Okayama University Okayama 700-8530 Japan Department of Applied Physics Nagoya University Nagoya 464-8603 Japan School of Advanced Science and Engineering Waseda University Shinjuku Tokyo 169-8555 Japan AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERAND-OIL) Kashiwa Chiba 277-8581 Japan Office of University Professor The University of Tokyo Kashiwa Chiba 277-8581 Japan Material Innovation Research Center The University of Tokyo Kashiwa Chiba 277-8561 Japan Trans-scale Quantum Science Institute The University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan

Photoinduced phase transitions have been intensively studied owing to the potential capability to control a material of interest in the ultrafast manner, which can induce exotic phases unable to be attained at equilibrium. However, the key mechanisms are still under debate, and it is currently a central issue as to how the couplings between the electron, lattice, and spin degrees of freedom are evolving during photoinduced phase transitions. Here, we use a recently developed analysis method, which we call frequency-domain angle-resolved photoemission spectroscopy (FDARPES), and reveal mode- and band-selective electron-phonon couplings during the photoinduced insulator-to-metal transition for Ta2NiSe5. We find that the lattice modulation corresponding to the 2 THz phonon mode, where the Ta lattice is sheared along the a axis, is the most relevant for the emergence of photoinduced semimetallic state. Furthermore, we find that the semimetallic and semiconducting bands coexist in the transient state, and demonstrate that FDARPES spectra can selectively detect the phonon-specific couplings to the two coexistent band structures during the photoinduced phase transition by resolving them in the frequency domain.

关键词： Dynamical phase transitions Excitons Phonons Photoinduced effect Narrow band gap systems Semimetals Density functional calculations High-harmonic generation Photoexcitation Time & angle resolved photoemission spectroscopy

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Dynamics of one-dimensional spin models via complex-time evolution of tensor networks

arXiv

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arXiv 2025年

作者： Cha, Jeong Hyeok Lee, Hyun-Yong Kim, Heung-Sik Department of Semiconductor Physics Kangwon National University Chuncheon24341 Korea Republic of Interdisciplinary Program in Earth Environmental System Science and Engineering Kangwon National University Chuncheon24341 Korea Republic of Division of Semiconductor Physics Korea University Sejong30019 Korea Republic of Department of Applied Physics Graduate School Korea University Sejong30019 Korea Republic of Institute of Quantum Convergence Technology Kangwon National University Chuncheon24341 Korea Republic of

Studying the real-time dynamics of strongly correlated systems poses significant challenges, which have recently become more manageable thanks to advances in density matrix renormalization group (DMRG) and tensor network methods. A notable development in this area is the introduction of a complex-time evolution scheme for tensor network states, originally suggested for solving Anderson impurity model and designed to suppress the growth of entanglement under time evolution. In this study, we employ the complex-time evolution scheme to investigate the dynamics of one-dimensional spin systems, specifically the transverse-field Ising model (TFIM) and the XXZ model. Our analysis revisits the dynamic critical exponent z of the TFIM and explores the dynamical structure factor in both gapped and gapless states of the XXZ model. Importantly, the complex-time evolution reproduces the results of real-time evolution while mitigating the rapid growth of quantum entanglement typically associated with the latter. These results demonstrate that the combination of complex-time evolution and extrapolation provides a robust and efficient framework for studying the dynamics of complex quantum systems, enabling more comprehensive insights into their behavior. © 2025, CC BY.

关键词： Quantum entanglement

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New experimental constraint on the 185W(n, γ)186W cross section

arXiv

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arXiv 2023年

作者： Larsen, A.C. Tveten, G.M. Renstrøm, T. Utsunomiya, H. Algin, E. Ari-Izumi, T. Ay, K.O. Bello Garrote, F.L. Crespo Campo, L. Furmyr, F. Goriely, S. Görgen, A. Guttormsen, M. Ingeberg, V.W. Kheswa, B.V. Kullmann, I.K.B. Laplace, T. Lima, E. Markova, M. Midtbø, J.E. Miyamoto, S. Mjøs, A.H. Modamio, V. Ozgur, M. Pogliano, F. Riemer-Sørensen, S. Sahin, E. Shen, S. Siem, S. Spyrou, A. Wiedeking, M. Department of Physics University of Oslo OsloN-0316 Norway Expert Analytics AS OsloN-0179 Norway Department of Physics Konan University Okamoto 8-9-1 Higashinada Kobe658-8501 Japan Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai201210 China Department of Metallurgical and Materials Engineering Pamukkale University Denizli20160 Turkey Department of Physics Eskisehir Osmangazi University Eskisehir26480 Turkey Institut d'Astronomie et d'Astrophysique Université Libre de Bruxelles Campus de la Plaine CP-226 Brussels1050 Belgium iThemba LABS P.O. Box 722 Somerset West7129 South Africa Department of Applied Physics and Engineering Mathematics University of Johannesburg Johannesburg2028 South Africa Institute d'Astronomie et d'Astrophysique Université Libre de Bruxelles Belgium Department of Nuclear Engineering University of California Berkeley94720 United States Laboratory of Advanced Science and Technology for Industry University of Hyogo 3-1-2 Kouto Kamigori Ako-gun Hyogo678-1205 Japan Institute of Theoretical Astrophysics University of Oslo OsloN-0316 Norway Department of Mathematics and Cybernetics SINTEF Digital OsloN-0314 Norway Physics Department Michigan State University East LansingMI48824 United States National Superconducting Cyclotron Laboratory Michigan State University East LansingMI48824 United States Joint Institute for Nuclear Astrophysics Center for the Evolution of the Elements University of Notre Dame Notre DameIN46556 United States School of Physics University of the Witwatersrand Johannesburg2050 South Africa

In this work, we present new data on the 182,183,184W(γ, n) cross sections, utilizing a quasi-monochromatic photon beam produced at the NewSUBARU synchrotron radiation facility. Further, we have extracted the nuclear level density and γ-ray strength function of 186W from data on the 186W(α, α'γ)186W reaction measured at the Oslo Cyclotron Laboratory. Combining previous measurements on the 186W(γ, n) cross section with our new 182,183,184W(γ, n) and (α, α'γ)186W data sets, we have deduced the 186W γ-ray strength function in the range of 1 185W(n, γ)186W cross section and reaction rate. Compared to the recommended Maxwellian-averaged cross section (MACS) in the KADoNiS-1.0 data base, our results are on average lower for the relevant energy range kBT ∈ [5, 100] keV, and we provide a smaller uncertainty for the MACS. The theoretical values of Bao et al. and the cross section experimentally constrained on photoneutron data of Sonnabend et al. are significantly higher than our result. The lower value by Mohr et al. is in very good agreement with our deduced MACS. Our new results could have implications for the s-process and in particular the predicted s-process production of 186,187Os nuclei. Copyright © 2023, The Authors. All rights reserved.

关键词： Gamma rays

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Comparison between OSEM and FBP reconstruction algorithms for the qualitative and quantitative interpretation of brain DAT-SPECT using an anthropomorphic striatal phantom: implications for the practice

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Research on Biomedical engineering 2020年第1期36卷 77-88页

作者： Trevisan, Ana Carolina Raed, Michel David Tumas, Vitor Alexandre-Santos, Leonardo Pitella, Felipe Arriva Itikawa, Emerson Nobuyuki Silvah, Jose Henrique Kato, Mery Martinez, Edson Zangiacomi Achcar, Jorge Alberto Simões, Marcus Vinícius Wichert-Ana, Lauro Interunits Post-Graduation Program on Bioengineering. São Carlos School of Engineering University of São Paulo Bandeirantes 3900 São Carlos14048-900 Brazil Section of Nuclear Medicine Image Science and Medical Physics Center Department of Internal Medicine University of São Paulo Ribeirão PretoSP Brazil Department of Social Medicine University of São Paulo Ribeirão PretoSP Brazil Department of Neuroscience and Behavioral Sciences. Ribeirão Preto Medical School University of São Paulo Ribeirão PretoSP Brazil

Purpose: The aim of this study was to evaluate the effect of ordered subsets maximization expectation (OSEM) and filtered backprojection (FBP) reconstruction algorithms for the qualitative interpretation of DAT-SPECT. Methods: Data were acquired using an anthropomorphic striatal phantom and a gamma camera (SPECT/CT). Images were reconstructed using different values of the covariates applied in the OSEM and FBP algorithms (iteration, subsets, order, and cut-off frequency). Image quality was compared according to each set of covariates used in the reconstruction and extracted quantitative parameters of the image quality, such as C, CV RCR, and RSR, as well as the angular coefficients of the edges in regions of interest. Results: Variations in the order from 0 to 10 do not influence the image if a trustworthy cut-off frequency range for FBP (0.9 to 1.6) and OSEM (1.2 to 1.5) are used. For OSEM, the iteration value and the number of subsets that guarantee better quality were those suggested by the developer of the algorithm used (3i8s). Conclusion: For a quality image, it is necessary to use the range of values found for the covariables order and cut-off frequency of the Butterworth filter in the FBP and OSEM reconstruction. OSEM reconstruction shows superiority in the images compared with FBP when the recommended three iterations and eight subsets are used. In the quantitative analyses, the evaluation showed that increasing the number of updates while allowing a better distinction of certain areas, culminates with a degradation image, making it inappropriate for clinical. © 2020, Sociedade Brasileira de Engenharia Biomedica.

关键词： Phantoms

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Search for the doubly heavy baryons Ω^(0)_(bc) and E^(0)_(bc) decaying to Λ^(+)_(c)π^(-) and E^(+)_(c)π^(-)

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Chinese physics C 2021年第9期45卷 10-21页

作者： R.Aaij C.Abelian Beteta T.Ackernley B.Adeva M.Adinolfi H.Afshamia C.A.Aidala S.Aiola Z.Ajaltouni S.Aka J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cartelie S.Amato Y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmayer J.J.Back P.Baladron Rodriguez V.Balagura W.Baldini J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Beminghoff H.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bitadze A.Bizzeti M.Bjorn M.P.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boyer C.Bozzi M J.Bradley S.Braun A.Brea Rodriguez M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camboni P.Campana A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Camiti L.Carus K.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov P.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colombo L.Congedo A.Contu N.Cooke G.Coombs G.Corti C.M.Costa Sobral B.Couturier D.C.Craik J.Crkovska M.Cruz Torres R.Currie C.L.Da Silva E.Dall'Occo J.Dalseno C.D'Ambrosi Centro Brasileiro de Pesquisas Fisicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina Institute of High Energy Physics(IHEP) BeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University ofChinese Academy of Sciences BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universite Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/FN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut für Kemphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universita degli Studi di Padova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma La Sapienza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and VU University Amsterdam AmsterdamNetherlands AGH-University of Science and Technology Faculty of Physics and Applied Computer ScienceKr

The first search for the doubly heavyΩ^(0)_(bc)baryon and a search for the E^(0)_(bc)baryon are performed using pp collision data collected via the LHCb experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV,corresponding to an integrated luminosity of 5.2 fb^(-1).The baryons are reconstructed via their decays to Λ^(+)_(c)π^(-)and E^(+)_(c)π^(-).No significant excess is fbund for invariant masses between 6700 and 7300 MeV/c^(2),in a rapidity range from 2.0 to 4.5 and a transverse momentum range from 2 to 20 MeV/*** limits are set on the ratio of the Ω^(0)_(bc)and E^(0)_(bc)production cross-section times the branching fraction to Λ^(+)_(c)π^(-)(E^(+)_(c)π^(-))relative to that of the Λ^(0)_(b)(E^(0)_(b))baryon,for different lifetime hypotheses,at 95%confidence *** upper limits range from 0.5 x 10^(-4)to 2.5 x 10^(-4)for theΩ^(0)_(bc)→Λ^(+)_(c)π^(-)(E^(0)_(bc)→Λ^(+)_(c)π^(-))decay,and from 1.4x 10^(-3)to 6.9 x 10^(-3)for theΩ^(0)_(bc)→E^(+)_(c)π^(-)(E^(0)_(bc)→E^(+)_(c)π^(-))decay,depending on the considered mass and lifetime of theΩ^(0)_(bc)(E^(0)_(bc))baryon.

关键词： B physics quarkonium spectroscopy heavy quark production

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Detection of the [O I] 63 µm emission line from the z = 6.04 quasar J2054-0005

arXiv

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arXiv 2024年

作者： Ishii, Nozomi Hashimoto, Takuya Ferkinhoff, Carl Rybak, Matus Inoue, Akio K. Michiyama, Tomonari Donevski, Darko Fujimoto, Seiji Salak, Dragan Kuno, Nario Matsuo, Hiroshi Mawatari, Ken Tamura, Yoichi Izumi, Takuma Nagao, Tohru Nakazato, Yurina Osone, Wataru Sugahara, Yuma Usui, Mitsutaka Wakasugi, Koki Yajima, Hidenobu Bakx, Tom J.L.C. Fudamoto, Yoshinobu Meyer, Romain A. Walter, Fabian Yoshida, Naoki Graduate School of Pure and Applied Sciences University of Tsukuba 1-1-1 Tennodai Ibaraki Tsukuba305-8571 Japan Setagaya Business Square 4-10-1 Yoga Setagaya-ku Tokyo158-0097 Japan Tomonaga Center for the History of the Universe University of Tsukuba 1-1-1 Tennodai Ibaraki Tsukuba305-8571 Japan Department of Physics Winona State University WinonaMN55987 United States Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology Mekelweg 4 Delft2628 CD Netherlands Leiden Observatory Leiden University P.O. Box 9513 Leiden2300 RA Netherlands SRON - Netherlands Institute for Space Research Niels Bohrweg 4 CA Leiden2333 Netherlands Department of Physics School of Advanced Science and Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan Waseda Research Institute for Science and Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan Faculty of Information Science Shunan University 843-4-2 Gakuendai Shunanshi Yamaguchi745-8566 Japan National Center for Nuclear Research Pasteura 7 Warsaw02-093 Poland SISSA Via Bonomea 265 Trieste34136 Italy Department of Astronomy The University of Texas at Austin AustinTX78712 United States Institute for the Advancement of Higher Education Hokkaido University Kita 17 Nishi 8 Kita-ku Hokkaido Sapporo060-0817 Japan Department of Cosmosciences Graduate School of Science Hokkaido University Kita 10 Nishi 8 Kita-ku Hokkaido Sapporo060-0810 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Department of Physics Graduate School of Science Nagoya University Furo Chikusa Nagoya Aichi464-8602 Japan Research Center for S ace and Cosmic Evolution Ehime Universit 2-5 Bunk o-cho Matsu ama Ehime Ja an 790-8577 China Department of Physics The University of Tokyo 7-3-1 Hongo Bunkyo

We report the highest-redshift detection of [O I] 63 µm from a luminous quasar, J2054-0005, at z = 6.04 based on the Atacama Large Millimeter/sub-millimeter Array Band 9 observations. The [O I] 63 µm line luminosity is (4.5 ± 1.5) × 109 L☉, corresponding to the [O I] 63 µm-to-far-infrared luminosity ratio of ≈ 6.7 × 10−4, which is consistent with the value obtained in the local universe. Remarkably, [O I] 63 µm is as bright as [C II] 158 µm, resulting in the [O I]-to-[C II] line luminosity ratio of 1.3 ± 0.5. Based on a careful comparison of the luminosity ratios of [O I] 63 µm, [C II] 158 µm, and dust continuum emission to models of photo-dissociation regions, we find that J2054-0005 has a gas density log(nH/cm−3)= 3.7 ± 0.3 and an incident far-ultraviolet radiation field of log(G/G0) = 3.0 ± 0.1, showing that [O I] 63 µm serves as an important coolant of the dense and warm gas in J2054-0005. A close examination of the [O I] and [C II] line profiles suggests that the [O I] line may be partially self-absorbed, however deeper observations are needed to verify this conclusion. Regardless, the gas density and incident radiation field are in a broad agreement with the values obtained in nearby star-forming galaxies and objects with [O I] 63 µm observations at z = 1 − 3 with the Herschel Space Observatory. These results demonstrate the power of ALMA high-frequency observations targeting [O I] 63 µm to examine the properties of photo-dissociation regions in high-redshift galaxies. © 2024, CC0.

关键词： Density of gases

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Naive lattice fermion without doublers

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Physical Review D 2021年第9期104卷 094505-094505页

作者： Xingyu Guo Chen-Te Ma Hui Zhang Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum Matter South China Normal University Guangzhou Guangdong 510006 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Southern Nuclear Science Computing Center South China Normal University Guangzhou Guangdong 510006 China Asia Pacific Center for Theoretical Physics Pohang University of Science and Technology Pohang Gyeongsangbuk-do 37673 South Korea School of Physics and Telecommunication Engineering South China Normal University Guangzhou Guangdong 510006 China Laboratory for Quantum Gravity and Strings Department of Mathematics and Applied Mathematics University of Cape Town Private Bag Rondebosch 7700 South Africa

We discuss the naive lattice fermion without the issue of doublers. A local lattice massless fermion action with chiral symmetry and Hermiticity cannot avoid the doubling problem from the Nielsen-Ninomiya theorem. Here we adopt the forward finite-difference deforming the γ5-Hermiticity but preserving the continuum chiral symmetry. The lattice momentum is not Hermitian without the continuum limit now. We demonstrate that there is no doubling issue from an exact solution. The propagator only has one pole in the first-order accuracy. Therefore, it is hard to know the avoiding due to the non-Hermiticity. For the second-order, the lattice propagator has two poles as before. This case also does not suffer from the doubling problem. Hence separating the forward derivative from the backward one evades the doublers under the field theory limit. Simultaneously, it is equivalent to breaking the Hermiticity. In the end, we discuss the topological charge and also demonstrate the numerical implementation of the hybrid Monte Carlo.

关键词： Lattice field theory Quantum field theory Chiral symmetry Hybrid Monte Carlo algorithm

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Search for the rare decay B^(0)→J/ψФ

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Chinese physics C 2021年第4期45卷 47-60页

作者： R.Aaij C.Abellin Beteta T.Ackernley B.Adeva M.Adinolfi H.Afsharnial C.A.Aidala S.Aiola Z.Ajaltouni S.Akar J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cartelle S.Amato Y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmaver J.J.Back S.Baker P.Baladron Rodriguez V.Balagura W.Baldinit J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay M.Becker F.Bedeschis I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bizzeti M.Biorn M.P.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Bradley S.Braun A.Brea Rodriguezs M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura C.Burr A.Burschee A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camboni P.Campana D.H.Campora Perez A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbonel G.Carboni R.Cardinale A.Cardini I.Carli P.Carniti L.Carus K.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov S.-G.Chitic V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov P.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colombo L.Congedo A.Contu N.Cooke G.Coombs G.Corti C.M.Costa Sobral B.Couturier D.C.Craik J.Crkovska M.Cruz Centro Brasileiro de Pesquisas Fisicas(CBPF) Riode JaneiroBrazil Universidade Federal do Riode Janeiro(UFRJ) Riode JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BejingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitq Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut fir Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati Frascatiltaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano Bicocca Milanolaly INFN Sezione di Milano MilanoItaly INFN Sezione di Cagliari Monserratoltaly Universita degli Studi di Padova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences KrakowPoland AGH-University of Science and Technology Faculty of Physics and Applied Computer Science

A search for the rare decay B^(0)→J/ψФis performed using Pp collision data collected with the LHCb dete-ctor at centre-of-mass energies of 7,8 and 13 TeV,corresponding to an integrated luminosity of9 *** significant signal of the decay is observed and an upper limitof 1.1x 10^(-7)at 90%confidence level is set on the branching fraction.

关键词： B physics flavour physics rare decay ω-Фmixing branching fraction

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Lattice Mismatch at the Heterojunction of Perovskite Solar Cells

引用

Angewandte Chemie 2024年第29期136卷

作者： Yong Wang Dr. Dexu Zheng Prof. Kai Wang Dr. Qi Yang Prof. Jin Qian Dr. Jiaju Zhou Prof. Shengzhong (Frank) Liu Prof. Dong Yang Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China China National Nuclear Power Co. Ltd. Beijing 100097 China Huanjiang Laboratory School of Aeronautics and Astronautics Zhejiang University Hangzhou 310027 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China

Lattice mismatch significantly influences microscopic transport in semiconducting devices, affecting interfacial charge behavior and device efficacy. This atomic-level disordering, often overlooked in previous research, is crucial for device efficiency and lifetime. Recent studies have highlighted emerging challenges related to lattice mismatch in perovskite solar cells, especially at heterojunctions, revealing issues like severe tensile stress, increased ion migration, and reduced carrier mobility. This review systematically discusses the effects of lattice mismatch on strain, material stability, and carrier dynamics. It also includes detailed characterizations of these phenomena and summarizes current strategies including epitaxial growth and buffer layer, as well as explores future solutions to mitigate mismatch-induced issues. We also provide the challenges and prospects for lattice mismatch, aiming to enhance the efficiency and stability of perovskite solar cells, and contribute to renewable energy technology advancements.

关键词： perovskite solar cell lattice mismatch epitaxial growth buffer layer interfacial stress

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