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Interference Effect between ϕ and Λ(1520) Production Channels in the γp→K+K−p Reaction near Threshold

Physical Review Letters 2016年第23期116卷 232001-232001页

作者： S. Y. Ryu J. K. Ahn T. Nakano D. S. Ahn S. Ajimura H. Akimune Y. Asano W. C. Chang J. Y. Chen S. Daté H. Ejiri H. Fujimura M. Fujiwara S. Fukui S. Hasegawa K. Hicks K. Horie T. Hotta S. H. Hwang K. Imai T. Ishikawa T. Iwata Y. Kato H. Kawai K. Kino H. Kohri Y. Kon N. Kumagai P. J. Lin Y. Maeda S. Makino T. Matsuda N. Matsuoka T. Mibe M. Miyabe M. Miyachi Y. Morino N. Muramatsu R. Murayama Y. Nakatsugawa S. i. Nam M. Niiyama M. Nomachi Y. Ohashi H. Ohkuma T. Ohta T. Ooba D. S. Oshuev J. D. Parker C. Rangacharyulu A. Sakaguchi T. Sawada P. M. Shagin Y. Shiino H. Shimizu E. A. Strokovsky Y. Sugaya M. Sumihama A. O. Tokiyasu Y. Toi H. Toyokawa T. Tsunemi M. Uchida M. Ungaro A. Wakai C. W. Wang S. C. Wang K. Yonehara T. Yorita M. Yoshimura M. Yosoi R. G. T. Zegers Research Center for Nuclear Physics Osaka University Ibaraki Osaka 567-0047 Japan Department of Physics Korea University Seoul 02841 Republic of Korea RIKEN The Institute of Physical and Chemical Research Wako Saitama 351-0198 Japan Department of Physics Konan University Kobe Hyogo 658-8501 Japan XFEL Project Head Office RIKEN Sayo Hyogo 679-5143 Japan Institute of Physics Academia Sinica Taipei 11529 Taiwan Light Source Division National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan Japan Synchrotron Radiation Research Institute Sayo Hyogo 679-5143 Japan Wakayama Medical College Wakayama 641-8509 Japan Department of Physics and Astronomy Ohio University Athens Ohio 45701 USA Department of Physics Osaka University Toyonaka Osaka 560-0043 Japan Korea Research Institute of Standards and Science (KRISS) Daejeon 34113 Republic of Korea Advanced Science Research Center Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan Research Center for Electron Photon Science Tohoku University Sendai Miyagi 982-0826 Japan Department of Physics Yamagata University Yamagata 990-8560 Japan Kobayashi-Maskawa Institute Nagoya University Nagoya Aichi 464-8602 Japan Department of Physics Chiba University Chiba 263-8522 Japan Proton Therapy Center Fukui Prefectural Hospital Fukui 910-8526 Japan Department of Applied Physics Miyazaki University Miyazaki 889-2192 Japan High Energy Accelerator Organization (KEK) Tsukuba Ibaraki 305-0801 Japan Department of Physics Tokyo Institute of Technology Tokyo 152-8551 Japan Department of Physics Pukyong National University Busan 48513 Republic of Korea Department of Physics Kyoto University Kyoto 606-8502 Japan Department of Physics and Engineering Physics University of Saskatchewan Saskatoon Saskatchewan S7N 5E2 Canada School of Physics and Astronomy University of Minnesota Minneapolis Minnesota 55455 USA Joint Institute for Nuclear Research Dubna Moscow Region 142281 Russia Department of Educatio

The ϕ−Λ(1520) interference effect in the γp→K+K−p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between ϕ and Λ(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K+K− pairs are observed at forward angles but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the s=2.1 GeV bump structure in forward differential cross sections for ϕ photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states.

关键词： Particle production Photon & charged-lepton interactions with hadrons Photonuclear reactions Polarization phenomena

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Measurements of e+e− pairs from open heavy flavor in p+p and d+A collisions at √sNN = 200 GeV

arXiv

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arXiv 2017年

作者： Adare, A. Afanasiev, S. Aidala, C. Ajitanand, N.N. Akiba, Y. Al-Bataineh, H. Alexander, J. Alfred, M. Aoki, K. Apadula, N. Aphecetche, L. Asai, J. Atomssa, E.T. Averbeck, R. Awes, T.C. Ayuso, C. Azmoun, B. Babintsev, V. Bagoly, A. Bai, M. Baksay, G. Baksay, L. Baldisseri, A. Barish, K.N. Barnes, P.D. Bassalleck, B. Basye, A.T. Bathe, S. Batsouli, S. Baublis, V. Baumann, C. Bazilevsky, A. Belikov, S. Belmont, R. Bennett, R. Berdnikov, A. Berdnikov, Y. Bickley, A.A. Blau, D.S. Boer, M. Boissevain, J.G. Bok, J.S. Borel, H. Boyle, K. Brooks, M.L. Bryslawskyj, J. Buesching, H. Bumazhnov, V. Bunce, G. Butler, C. Butsyk, S. Camacho, C.M. Campbell, S. Roman, V. Canoa Chang, B.S. Chang, W.C. Charvet, J.-L. Chernichenko, S. Chi, C.Y. Chiu, M. Choi, I.J. Choudhury, R.K. Chujo, T. Chung, P. Churyn, A. Cianciolo, V. Citron, Z. Cole, B.A. Connors, M. Constantin, P. Csanád, M. Csörgo, T. Dahms, T. Dairaku, S. Danley, T.W. Das, K. David, G. DeBlasio, K. Dehmelt, K. Denisov, A. d’Enterria, D. Deshpande, A. Desmond, E.J. Dietzsch, O. Dion, A. Do, J.H. Donadelli, M. Drapier, O. Drees, A. Drees, K.A. Dubey, A.K. Dumancic, M. Durham, J.M. Durum, A. Dutta, D. Dzhordzhadze, V. Efremenko, Y.V. Elder, T. Ellinghaus, F. Engelmore, T. Enokizono, A. En’yo, H. Esumi, S. Eyser, K.O. Fadem, B. Fan, W. Feege, N. Fields, D.E. Finger, M. Finger, M. Fleuret, F. Fokin, S.L. Fraenkel, Z. Frantz, J.E. Franz, A. Frawley, A.D. Fujiwara, K. Fukao, Y. Fukuda, Y. Fusayasu, T. Gal, C. Garishvili, I. Ge, H. Glenn, A. Gong, H. Gonin, M. Gosset, J. Goto, Y. de Cassagnac, R. Granier Grau, N. Greene, S.V. Perdekamp, M. Grosse Gunji, T. Gustafsson, H.-Å. Hachiya, T. Henni, A. Hadj Haggerty, J.S. Hahn, K.I. Hamagaki, H. Han, R. Han, S.Y. Hartouni, E.P. Haruna, K. Hasegawa, S. Haseler, T.O.S. Haslum, E. Hayano, R. He, X. Heffner, M. Hemmick, T.K. Hester, T. Hill, J.C. Hill, K. Hohlmann, M. Holzmann, W. Homma, K. Hong, B. Abilene Christian University AbileneTX79699 United States Institute of Physics Academia Sinica Taipei11529 Taiwan Department of Physics Augustana University Sioux FallsSD57197 United States Department of Physics Banaras Hindu University Varanasi221005 India Bhabha Atomic Research Centre Bombay400 085 India Baruch College City University of New York New YorkNY10010 United States Collider-Accelerator Department Brookhaven National Laboratory UptonNY11973-5000 United States Physics Department Brookhaven National Laboratory UptonNY11973-5000 United States University of California-Riverside RiversideCA92521 United States Charles University Ovocný trh 5 Praha 1 Prague116 36 Czech Republic Chonbuk National University Jeonju561-756 Korea Republic of Science and Technology on Nuclear Data Laboratory China Institute of Atomic Energy Beijing102413 China Center for Nuclear Study Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan University of Colorado BoulderCO80309 United States Columbia University New York New York 10027 Nevis 10533 United States Czech Technical University Zikova 4 Prague 6166 36 Czech Republic Dapnia CEA Saclay Gif-sur-YvetteF-91191 France Debrecen University Debrecen Egyetem tér 1 H-4010 Hungary ELTE Eötvös Loránd University Budapest Pázmány P. s. 1/AH-1117 Hungary Eszterházy Károly University Károly Róbert Campus Mátrai út 36 ngyösH-3200 Gÿ Hungary Ewha Womans University Seoul120-750 Korea Republic of Florida Institute of Technology MelbourneFL32901 United States Florida State University TallahasseeFL32306 United States Georgia State University AtlantaGA30303 United States Hiroshima University Kagamiyama Higashi-Hiroshima739-8526 Japan Department of Physics and Astronomy Howard University WashingtonDC20059 United States IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino142281 Russia University of Illin

We report a measurement of e+e− pairs from semileptonic heavy-flavor decays in p+p collisions at √sNN = 200 GeV. The e+e− pair yield from b¯b and cc¯ is separated by exploiting a double differential fit done simultaneously in dielectron invariant mass and pT. We used three different event generators, pythia, mc@nlo, and powheg, to simulate the e+e− spectra from cc¯ and b¯b production. The data can be well described by all three generators within the detector acceptance. However, when using the generators to extrapolate to 4π, significant differences are observed for the total cross section. These difference are less pronounced for b¯b than for cc¯. The same model dependence was observed in already published d+A data. The p+p data are also directly compared with d+A data in mass and pT, and within the statistical accuracy no nuclear modification is seen. Copyright © 2017, The Authors. All rights reserved.

关键词： Germanium alloys

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Precision lattice test of the gauge/gravity duality at large N

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Physical Review D 2016年第9期94卷 094501-094501页

作者： Evan Berkowitz Enrico Rinaldi Masanori Hanada Goro Ishiki Shinji Shimasaki Pavlos Vranas Nuclear and Chemical Sciences Division Lawrence Livermore National Laboratory Livermore California 94550 USA Stanford Institute for Theoretical Physics Stanford University Stanford California 94305 USA Yukawa Institute for Theoretical Physics Kyoto University Kitashirakawa Oiwakecho Sakyo-ku Kyoto 606-8502 Japan The Hakubi Center for Advanced Research Kyoto University Yoshida Ushinomiyacho Sakyo-ku Kyoto 606-8501 Japan Center for Integrated Research in Fundamental Science and Engineering (CiRfSE) University of Tsukuba Tsukuba Ibaraki 305-8571 Japan Graduate School of Pure and Applied Sciences University of Tsukuba Tsukuba Ibaraki 305-8571 Japan Research and Education Center for Natural Sciences Keio University Yokohama Kanagawa 223-8521 Japan KEK Theory Center High Energy Accelerator Research Organization Tsukuba 305-0801 Japan

We perform a systematic, large-scale lattice simulation of D0-brane quantum mechanics. The large-N and continuum limits of the gauge theory are taken for the first time at various temperatures 0.4≤T≤1.0. As a way to test the gauge/gravity duality conjecture we compute the internal energy of the black hole as a function of the temperature directly from the gauge theory. We obtain a leading behavior that is compatible with the supergravity result E/N2=7.41T14/5: the coefficient is estimated to be 7.4±0.5 when the exponent is fixed and stringy corrections are included. This is the first confirmation of the supergravity prediction for the internal energy of a black hole at finite temperature coming directly from the dual gauge theory. We also constrain stringy corrections to the internal energy.

关键词： Gauge-gravity dualities M-theory Lattice gauge theory

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The optical vault: A reconfigurable optical bottle beam for photophoretic trapping of absorbing macro-particles

The optical vault: A reconfigurable optical bottle beam for ...

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European Conference on Lasers and Electro-Optics, CLEO 2015

作者： Turpin, A. Shvedov, V. Hnatovsky, C. Loiko, Yu. V. Mompart, J. Krolikowski, W. Departament de Física Universitat Autànoma de Barcelona BellaterraE-08193 Spain Laser Physics Centre Australian National University CanberraB4 7ET Australia Aston Institute of Photonic Technologies School of Engineering and Applied Science Aston University BirminghamB4 7ET United Kingdom Science Program Texas A and M University at Qatar Doha Qatar

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Understanding transport simulations of heavy-ion collisions at 100A and 400A MeV: Comparison of heavy-ion transport codes under controlled conditions

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Physical Review C 2016年第4期93卷 044609-044609页

作者： Jun Xu Lie-Wen Chen ManYee Betty Tsang Hermann Wolter Ying-Xun Zhang Joerg Aichelin Maria Colonna Dan Cozma Pawel Danielewicz Zhao-Qing Feng Arnaud Le Fèvre Theodoros Gaitanos Christoph Hartnack Kyungil Kim Youngman Kim Che-Ming Ko Bao-An Li Qing-Feng Li Zhu-Xia Li Paolo Napolitani Akira Ono Massimo Papa Taesoo Song Jun Su Jun-Long Tian Ning Wang Yong-Jia Wang Janus Weil Wen-Jie Xie Feng-Shou Zhang Guo-Qiang Zhang Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Department of Physics and Astronomy and Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai Jiao Tong University Shanghai 200240 China National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy Michigan State University East Lansing Michigan 48824 USA Fakultät für Physik Universität München D-85748 Garching Germany China Institute of Atomic Energy Beijing 102413 People's Republic of China SUBATECH UMR 6457 Ecole des Mines de Nantes-IN2P3/CNRS-Université de Nantes France INFN-LNS Laboratori Nazionali del Sud 95123 Catania Italy IFIN-HH Reactorului 30 077125 Măgurele-Bucharest Romania Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 People's Republic of China GSI Helmholtzzentrum für Schwerionenforschung Darmstadt Germany Department of Theoretical Physics Aristotle University of Thessaloniki GR-54124 Thessaloniki Greece Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Korea Cyclotron Institute and Department of Physics and Astronomy Texas A&M University College Station Texas 77843 USA Department of Physics and Astronomy Texas A&M University-Commerce Commerce Texas 75429-3011 USA School of Science Huzhou University Huzhou 313000 China Institut de Physique Nucléaire CNRS/IN2P3 Université Paris-Sud Université Paris-Saclay 91406 Orsay cedex France Department of Physics Tohoku University Sendai 980-8578 Japan INFN-Sezione di Catania 95123 Catania Italy Frankfurt Institut for Advanced Studies and Institute for Theoretical Physics Johann Wolfgang Goethe Universität Frankfurt am Main Germany Sino-French Institute of Nuclear Engineering & Technology Sun Yat-sen University Zhuhai 519082 China College of Physics and Electrical Engineering Anyang Normal University Anyang Henan 455000 China Department of Physics and Technology Guangxi Normal University Guilin 541004 China Department of

Transport simulations are very valuable for extracting physics information from heavy-ion-collision experiments. With the emergence of many different transport codes in recent years, it becomes important to estimate their robustness in extracting physics information from experiments. We report on the results of a transport-code-comparison project. Eighteen commonly used transport codes were included in this comparison: nine Boltzmann-Uehling-Uhlenbeck-type codes and nine quantum-molecular-dynamics-type codes. These codes have been asked to simulate Au+Au collisions using the same physics input for mean fields and for in-medium nucleon-nucleon cross sections, as well as the same impact parameter, the similar initialization setup, and other calculational parameters at 100A and 400A MeV incident energy. Among the codes we compare one-body observables such as rapidity and transverse flow distributions. We also monitor nonobservables such as the initialization of the internal states of colliding nuclei and their stability, the collision rates, and the Pauli blocking. We find that not completely identical initializations may have contributed partly to different evolutions. Different strategies to determine the collision probabilities and to enforce the Pauli blocking also produce considerably different results. There is a substantial spread in the predictions for the observables, which is much smaller at the higher incident energy. We quantify the uncertainties in the collective flow resulting from the simulation alone as about 30% at 100A MeV and 13% at 400A MeV, respectively. We propose further steps within the code comparison project to test the different aspects of transport simulations in a box calculation of infinite nuclear matter. This should, in particular, improve the robustness of transport model predictions at lower incident energies, where abundant amounts of data are available.

关键词： Collective flow Low & intermediate energy heavy-ion reactions Particle correlations & fluctuations Hydrodynamic models Monte Carlo methods Thermal & statistical models

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Limits on Active to Sterile Neutrino Oscillations from Disappearance Searches in the MINOS, Daya Bay, and Bugey-3 Experiments

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Physical Review Letters 2016年第15期117卷 151801-151801页

作者： P. Adamson F. P. An I. Anghel A. Aurisano A. B. Balantekin H. R. Band G. Barr M. Bishai A. Blake S. Blyth G. J. Bock D. Bogert D. Cao G. F. Cao J. Cao S. V. Cao T. J. Carroll C. M. Castromonte W. R. Cen Y. L. Chan J. F. Chang L. C. Chang Y. Chang H. S. Chen Q. Y. Chen R. Chen S. M. Chen Y. Chen Y. X. Chen J. Cheng J.-H. Cheng Y. P. Cheng Z. K. Cheng J. J. Cherwinka S. Childress M. C. Chu A. Chukanov J. A. B. Coelho L. Corwin D. Cronin-Hennessy J. P. Cummings J. de Arcos S. De Rijck Z. Y. Deng A. V. Devan N. E. Devenish X. F. Ding Y. Y. Ding M. V. Diwan M. Dolgareva J. Dove D. A. Dwyer W. R. Edwards C. O. Escobar J. J. Evans E. Falk G. J. Feldman W. Flanagan M. V. Frohne M. Gabrielyan H. R. Gallagher S. Germani R. Gill R. A. Gomes M. Gonchar G. H. Gong H. Gong M. C. Goodman P. Gouffon N. Graf R. Gran M. Grassi K. Grzelak W. Q. Gu M. Y. Guan L. Guo R. P. Guo X. H. Guo Z. Guo A. Habig R. W. Hackenburg S. R. Hahn R. Han S. Hans J. Hartnell R. Hatcher M. He K. M. Heeger Y. K. Heng A. Higuera A. Holin Y. K. Hor Y. B. Hsiung B. Z. Hu T. Hu W. Hu E. C. Huang H. X. Huang J. Huang X. T. Huang P. Huber W. Huo G. Hussain J. Hylen G. M. Irwin Z. Isvan D. E. Jaffe P. Jaffke C. James K. L. Jen D. Jensen S. Jetter X. L. Ji X. P. Ji J. B. Jiao R. A. Johnson J. K. de Jong J. Joshi T. Kafka L. Kang S. M. S. Kasahara S. H. Kettell S. Kohn G. Koizumi M. Kordosky M. Kramer A. Kreymer K. K. Kwan M. W. Kwok T. Kwok K. Lang T. J. Langford K. Lau L. Lebanowski J. Lee J. H. C. Lee R. T. Lei R. Leitner J. K. C. Leung C. Li D. J. Li F. Li G. S. Li Q. J. Li S. Li S. C. Li W. D. Li X. N. Li Y. F. Li Z. B. Li H. Liang C. J. Lin G. L. Lin S. Lin S. K. Lin Y.-C. Lin J. J. Ling J. M. Link P. J. Litchfield L. Littenberg B. R. Littlejohn D. W. Liu J. C. Liu J. L. Liu C. W. Loh C. Lu H. Q. Lu J. S. Lu P. Lucas K. B. Luk Z. Lv Q. M. Ma X. B. Ma X. Y. Ma Y. Q. Ma Y. Malyshkin W. A. Mann M. L. Marshak D. A. Martinez Caicedo N. Mayer K. T. McDonald C. McGivern R. D. McKeown M. M. Medeiros R. Mehdiyev J. R. Meier M. D. Messier W. H. Miller S. R. Mishra I. Fermi National Accelerator Laboratory Batavia Illinois 60510 USA Institute of Modern Physics East China University of Science and Technology Shanghai Department of Physics and Astronomy Iowa State University Ames Iowa 50011 USA Argonne National Laboratory Argonne Illinois 60439 USA Department of Physics University of Cincinnati Cincinnati Ohio 45221 USA Physics Department University of Wisconsin Madison Wisconsin 53706 USA Department of Physics Yale University New Haven Connecticut 06520 USA Subdepartment of Particle Physics University of Oxford Oxford OX1 3RH United Kingdom Brookhaven National Laboratory Upton New York 11973 USA Cavendish Laboratory University of Cambridge Cambridge CB3 0HE United Kingdom Lancaster University Lancaster LA1 4YB United Kingdom Department of Physics National Taiwan University Taipei National United University Miao-Li Nanjing University Nanjing Institute of High Energy Physics Beijing Department of Physics University of Texas at Austin Austin Texas 78712 USA Instituto de Física Universidade Federal de Goiás 74690-900 Goiânia GO Brazil Chinese University of Hong Kong Hong Kong Institute of Physics National Chiao-Tung University Hsinchu Shandong University Jinan School of Physics and Astronomy University of Manchester Manchester M13 9PL United Kingdom Department of Engineering Physics Tsinghua University Beijing Shenzhen University Shenzhen North China Electric Power University Beijing Sun Yat-Sen (Zhongshan) University Guangzhou Joint Institute for Nuclear Research Dubna Moscow Region Physics Department Tufts University Medford Massachusetts 02155 USA Indiana University Bloomington Indiana 47405 USA University of Minnesota Minneapolis Minnesota 55455 USA Siena College Loudonville New York 12211 USA Department of Physics Illinois Institute of Technology Chicago Illinois 60616 USA Department of Physics College of William & Mary Williamsburg Virginia 23187 USA Department of Physics and Astronomy Univers

Searches for a light sterile neutrino have been performed independently by the MINOS and the Daya Bay experiments using the muon (anti)neutrino and electron antineutrino disappearance channels, respectively. In this Letter, results from both experiments are combined with those from the Bugey-3 reactor neutrino experiment to constrain oscillations into light sterile neutrinos. The three experiments are sensitive to complementary regions of parameter space, enabling the combined analysis to probe regions allowed by the Liquid Scintillator Neutrino Detector (LSND) and MiniBooNE experiments in a minimally extended four-neutrino flavor framework. Stringent limits on sin22θμe are set over 6 orders of magnitude in the sterile mass-squared splitting Δm412. The sterile-neutrino mixing phase space allowed by the LSND and MiniBooNE experiments is excluded for Δm412<0.8 eV2 at 95% CLs.

关键词： Neutrino oscillations Particle mixing & oscillations Neutrinos Sterile neutrinos Particle data analysis

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Measurement of the Inelastic Proton-Proton Cross Section at s=13 TeV with the ATLAS Detector at the LHC

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Physical Review Letters 2016年第18期117卷 182002-182002页

作者： M. Aaboud G. Aad B. Abbott J. Abdallah O. Abdinov B. Abeloos R. Aben O. S. AbouZeid N. L. Abraham H. Abramowicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya L. Adamczyk D. L. Adams J. Adelman S. Adomeit T. Adye A. A. Affolder T. Agatonovic-Jovin J. Agricola J. A. Aguilar-Saavedra S. P. Ahlen F. Ahmadov G. Aielli H. Akerstedt T. P. A. Åkesson A. V. Akimov G. L. Alberghi J. Albert S. Albrand M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov C. Alexa G. Alexander T. Alexopoulos M. Alhroob B. Ali M. Aliev G. Alimonti J. Alison S. P. Alkire B. M. M. Allbrooke B. W. Allen P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani M. Alstaty B. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi B. T. Amadio K. Amako Y. Amaral Coutinho C. Amelung D. Amidei S. P. Amor Dos Santos A. Amorim S. Amoroso G. Amundsen C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei S. Angelidakis I. Angelozzi P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi C. Antel M. Antonelli A. Antonov F. Anulli M. Aoki L. Aperio Bella G. Arabidze Y. Arai J. P. Araque A. T. H. Arce F. A. Arduh J-F. Arguin S. Argyropoulos M. Arik A. J. Armbruster L. J. Armitage O. Arnaez H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni S. Artz S. Asai N. Asbah A. Ashkenazi B. Åsman L. Asquith K. Assamagan R. Astalos M. Atkinson N. B. Atlay K. Augsten G. Avolio B. Axen M. K. Ayoub G. Azuelos M. A. Baak A. E. Baas M. J. Baca H. Bachacou K. Bachas M. Backes M. Backhaus P. Bagiacchi P. Bagnaia Y. Bai J. T. Baines O. K. Baker E. M. Baldin P. Balek T. Balestri F. Balli W. K. Balunas E. Banas Sw. Banerjee A. A. E. Bannoura L. Barak E. L. Barberio D. Barberis M. Barbero T. Barillari M-S Barisits T. Barklow N. Barlow S. L. Barnes B. M. Barnett R. M. Barnett Z. Barnovska A. Baroncelli G. Barone A. J. Barr L. Barranco Navarro F. Barreiro J. Barreiro Guimarães da Costa R. Bartoldus A. E. Barton P. Bartos A. Basalaev A. Bassalat R. L. Bates S. J. Batista J. R. Batley M. Battaglia M. Bauce F. Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA University of Iowa Iowa City Iowa USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel Center for High Energy Physics University of Oregon Eugene Oregon USA Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Institute of Physics University of Belgrade Belgrade Serbia II Physikalisches Institut Georg-August-Universität Göttingen Germany Laboratório de Instrumentação e Física Experimental de Partículas—LIP Lisboa Portugal Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Department of Physics Boston University Boston Massachusetts USA Joint Institute for Nu

This Letter presents a measurement of the inelastic proton-proton cross section using 60 μb−1 of pp collisions at a center-of-mass energy s of 13 TeV with the ATLAS detector at the LHC. Inelastic interactions are selected using rings of plastic scintillators in the forward region (2.07<|η|<3.86) of the detector. A cross section of 68.1±1.4 mb is measured in the fiducial region ξ=MX2/s>10−6, where MX is the larger invariant mass of the two hadronic systems separated by the largest rapidity gap in the event. In this ξ range the scintillators are highly efficient. For diffractive events this corresponds to cases where at least one proton dissociates to a system with MX>13 GeV. The measured cross section is compared with a range of theoretical predictions. When extrapolated to the full phase space, a cross section of 78.1±2.9 mb is measured, consistent with the inelastic cross section increasing with center-of-mass energy.

关键词： Particle interactions Particle production Quark & gluon jets Hadron colliders

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Measurement of the ZZ Production Cross Section in pp Collisions at s=13 TeV with the ATLAS Detector

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Physical Review Letters 2016年第10期116卷 101801-101801页

作者： G. Aad B. Abbott J. Abdallah O. Abdinov B. Abeloos R. Aben M. Abolins O. S. AbouZeid H. Abramowicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya L. Adamczyk D. L. Adams J. Adelman S. Adomeit T. Adye A. A. Affolder T. Agatonovic-Jovin J. Agricola J. A. Aguilar-Saavedra S. P. Ahlen F. Ahmadov G. Aielli H. Akerstedt T. P. A. Åkesson A. V. Akimov G. L. Alberghi J. Albert S. Albrand M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov C. Alexa G. Alexander T. Alexopoulos M. Alhroob G. Alimonti L. Alio J. Alison S. P. Alkire B. M. M. Allbrooke B. W. Allen P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani B. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi B. T. Amadio K. Amako Y. Amaral Coutinho C. Amelung D. Amidei S. P. Amor Dos Santos A. Amorim S. Amoroso N. Amram G. Amundsen C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei S. Angelidakis I. Angelozzi P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki L. Aperio Bella G. Arabidze Y. Arai J. P. Araque A. T. H. Arce F. A. Arduh J-F. Arguin S. Argyropoulos M. Arik A. J. Armbruster L. J. Armitage O. Arnaez H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni S. Artz S. Asai N. Asbah A. Ashkenazi B. Åsman L. Asquith K. Assamagan R. Astalos M. Atkinson N. B. Atlay K. Augsten G. Avolio B. Axen M. K. Ayoub G. Azuelos M. A. Baak A. E. Baas M. J. Baca H. Bachacou K. Bachas M. Backes M. Backhaus P. Bagiacchi P. Bagnaia Y. Bai J. T. Baines O. K. Baker E. M. Baldin P. Balek T. Balestri F. Balli W. K. Balunas E. Banas Sw. Banerjee A. A. E. Bannoura L. Barak E. L. Barberio D. Barberis M. Barbero T. Barillari M. Barisonzi T. Barklow N. Barlow S. L. Barnes B. M. Barnett R. M. Barnett Z. Barnovska A. Baroncelli G. Barone A. J. Barr L. Barranco Navarro F. Barreiro J. Barreiro Guimarães da Costa R. Bartoldus A. E. Barton P. Bartos A. Basalaev A. Bassalat A. Basye R. L. Bates S. J. Batista J. R. Batley M. Battaglia M. Bauce F. Bauer H. S. Ba CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Academia Sinica Taipei Taiwan Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam The Netherlands Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel Center for High Energy Physics University of Oregon Eugene Oregon USA Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Institute of Physics University of Belgrade Belgrade Serbia II Physikalisches Institut Georg-August-Universität Göttingen Germany Laboratório de Instrumentação e Física Experimental de Partículas—LIP Lisboa Portugal Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Department of Physics Boston University Boston Massachusetts USA Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sez

The ZZ production cross section in proton-proton collisions at 13 TeV center-of-mass energy is measured using 3.2 fb−1 of data recorded with the ATLAS detector at the Large Hadron Collider. The considered Z boson candidates decay to an electron or muon pair of mass 66–116 GeV. The cross section is measured in a fiducial phase space reflecting the detector acceptance. It is also extrapolated to a total phase space for Z bosons in the same mass range and of all decay modes, giving 16.7−2.0+2.2(stat)+0.9−0.7(syst)+1.0−0.7(lumi) pb. The results agree with standard model predictions.

关键词： Electroweak interaction Particle production W & Z bosons Hadron colliders Multi-purpose particle detectors

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Search for Higgs and Z Boson Decays to ϕγ with the ATLAS Detector

引用

Physical Review Letters 2016年第11期117卷 111802-111802页

作者： M. Aaboud G. Aad B. Abbott J. Abdallah O. Abdinov B. Abeloos R. Aben O. S. AbouZeid N. L. Abraham H. Abramowicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya L. Adamczyk D. L. Adams J. Adelman S. Adomeit T. Adye A. A. Affolder T. Agatonovic-Jovin J. Agricola J. A. Aguilar-Saavedra S. P. Ahlen F. Ahmadov G. Aielli H. Akerstedt T. P. A. Åkesson A. V. Akimov G. L. Alberghi J. Albert S. Albrand M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov C. Alexa G. Alexander T. Alexopoulos M. Alhroob B. Ali M. Aliev G. Alimonti J. Alison S. P. Alkire B. M. M. Allbrooke B. W. Allen P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani M. Alstaty B. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi B. T. Amadio K. Amako Y. Amaral Coutinho C. Amelung D. Amidei S. P. Amor Dos Santos A. Amorim S. Amoroso G. Amundsen C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei S. Angelidakis I. Angelozzi P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi C. Antel M. Antonelli A. Antonov F. Anulli M. Aoki L. Aperio Bella G. Arabidze Y. Arai J. P. Araque A. T. H. Arce F. A. Arduh J-F. Arguin S. Argyropoulos M. Arik A. J. Armbruster L. J. Armitage O. Arnaez H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni S. Artz S. Asai N. Asbah A. Ashkenazi B. Åsman L. Asquith K. Assamagan R. Astalos M. Atkinson N. B. Atlay K. Augsten G. Avolio B. Axen M. K. Ayoub G. Azuelos M. A. Baak A. E. Baas M. J. Baca H. Bachacou K. Bachas M. Backes M. Backhaus P. Bagiacchi P. Bagnaia Y. Bai J. T. Baines O. K. Baker E. M. Baldin P. Balek T. Balestri F. Balli W. K. Balunas E. Banas Sw. Banerjee A. A. E. Bannoura L. Barak E. L. Barberio D. Barberis M. Barbero T. Barillari M-S Barisits T. Barklow N. Barlow S. L. Barnes B. M. Barnett R. M. Barnett Z. Barnovska A. Baroncelli G. Barone A. J. Barr L. Barranco Navarro F. Barreiro J. Barreiro Guimarães da Costa R. Bartoldus A. E. Barton P. Bartos A. Basalaev A. Bassalat R. L. Bates S. J. Batista J. R. Batley M. Battaglia M. Bauce F. Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA University of Iowa Iowa City Iowa USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Université Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel Center for High Energy Physics University of Oregon Eugene Oregon USA Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Institute of Physics University of Belgrade Belgrade Serbia II Physikalisches Institut Georg-August-Universität Göttingen Germany Laboratório de Instrumentação e Física Experimental de Partículas - LIP Lisboa Portugal Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada (Spain) Portugal Department of Physics Boston University Boston Massachusetts USA Join

A search for the decays of the Higgs and Z bosons to a ϕ meson and a photon is performed with a pp collision data sample corresponding to an integrated luminosity of 2.7 fb−1 collected at s=13 TeV with the ATLAS detector at the LHC. No significant excess of events is observed above the background, and 95% confidence level upper limits on the branching fractions of the Higgs and Z boson decays to ϕγ of 1.4×10−3 and 8.3×10−6, respectively, are obtained.

关键词： Electroweak interaction Leptonic, semileptonic & radiative decays Higgs bosons Strange quark Hadron colliders

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Measurement of emission-angle anisotropy via long-range angular correlations with high-pT hadrons in d+Au and p+p collisions at √sNN = 200 GeV

arXiv

引用

arXiv 2017年

作者： Adare, A. Aidala, C. Ajitanand, N.N. Akiba, Y. Al-Bataineh, H. Alexander, J. Alfred, M. Angerami, A. Aoki, K. Apadula, N. Aramaki, Y. Atomssa, E.T. Averbeck, R. Awes, T.C. Azmoun, B. Babintsev, V. Bagoly, A. Bai, M. Baksay, G. Baksay, L. Barish, K.N. Bassalleck, B. Basye, A.T. Bathe, S. Baublis, V. Baumann, C. Bazilevsky, A. Belikov, S. Belmont, R. Bennett, R. Berdnikov, A. Berdnikov, Y. Bhom, J.H. Blau, D.S. Blau, D.S. Boer, M. Bok, J.S. Boyle, K. Brooks, M.L. Bryslawskyj, J. Buesching, H. Bumazhnov, V. Bunce, G. Butsyk, S. Campbell, S. Canoa Roman, V. Caringi, A. Chen, C.-H. Chi, C.Y. Chiu, M. Choi, I.J. Choi, J.B. Choudhury, R.K. Christiansen, P. Chujo, T. Chung, P. Chvala, O. Cianciolo, V. Citron, Z. Cole, B.A. Conesa del Valle, Z. Connors, M. Csanád, M. Csörgo, T. Dahms, T. Dairaku, S. Danchev, I. Danley, T.W. Das, K. Datta, A. Daugherity, M.S. David, G. Dayananda, M.K. DeBlasio, K. Dehmelt, K. Denisov, A. Deshpande, A. Desmond, E.J. Dharmawardane, K.V. Dietzsch, O. Dion, A. Do, J.H. Donadelli, M. D'Orazio, L. Drapier, O. Drees, A. Drees, K.A. Durham, J.M. Durum, A. Dutta, D. Edwards, S. Efremenko, Y.V. Ellinghaus, F. Engelmore, T. Enokizono, A. En'Yo, H. Esumi, S. Fadem, B. Fan, W. Feege, N. Fields, D.E. Finger, M. Finger, M. Fleuret, F. Fokin, S.L. Fraenkel, Z. Frantz, J.E. Franz, A. Frawley, A.D. Fujiwara, K. Fukao, Y. Fukuda, Y. Fusayasu, T. Gal, C. Gallus, P. Garg, P. Garishvili, I. Ge, H. Glenn, A. Gong, H. Gonin, M. Goto, Y. Granier de Cassagnac, R. Grau, N. Greene, S.V. Grim, G. Grosse Perdekamp, M. Gunji, T. Gustafsson, H.-A.A. Hachiya, T. Haggerty, J.S. Hahn, K.I. Hamagaki, H. Hamblen, J. Han, R. Han, S.Y. Hanks, J. Hasegawa, S. Haseler, T.O.S. Haslum, E. Hayano, R. He, X. Heffner, M. Hemmick, T.K. Hester, T. Hill, J.C. Hill, K. Hodges, A. Hohlmann, M. Holzmann, W. Homma, K. Hong, B. Horaguchi, T. Hornback, D. Hoshino, T. Hotvedt, N. Huang, J. Abilene Christian University AbileneTX79699 United States Department of Physics Augustana University Sioux FallsSD57197 United States Department of Physics Banaras Hindu University Varanasi221005 India Bhabha Atomic Research Centre Bombay400 085 India Baruch College City University of New York New YorkNY10010 United States Collider-Accelerator Department Brookhaven National Laboratory UptonNY11973-5000 United States Physics Department Brookhaven National Laboratory UptonNY11973-5000 United States University of California-Riverside RiversideCA92521 United States Charles University Ovocný trh 5 Praha 1 Prague116 36 Czech Republic Chonbuk National University Jeonju561-756 Korea Republic of Science and Technology on Nuclear Data Laboratory China Institute of Atomic Energy Beijing102413 China Center for Nuclear Study Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan University of Colorado BoulderCO80309 United States Columbia University New YorkNY10027 United States Nevis Laboratories IrvingtonNY10533 United States Czech Technical University Zikova 4 Prague 6166 36 Czech Republic Dapnia CEA Saclay Gif-sur-YvetteF-91191 France Debrecen University Egyetem tér 1 DebrecenH-4010 Hungary ELTE Eötvös Loránd University Pázmány P. s. 1/A BudapestH-1117 Hungary Eszterházy Károly University Károly Róbert Campus Mátrai út 36 GyöngyösH-3200 Hungary Ewha Womans University Seoul120-750 Korea Republic of Florida Institute of Technology MelbourneFL32901 United States Florida State University TallahasseeFL32306 United States Georgia State University AtlantaGA30303 United States Hiroshima University Kagamiyama Higashi-Hiroshima739-8526 Japan Department of Physics and Astronomy Howard University WashingtonDC20059 United States IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino142281 Russia University of Illinois at Urbana-Champaign Urb

We present measurements of two-particle angular correlations between high-transverse-momentum (2 0 observed at midrapidity (|η| NN = 200 GeV. The azimuthal angle correlations for particle pairs with this large rapidity gap in the Au-going direction exhibit a characteristic structure that persists up to pT≈6 GeV/c and which strongly depends on collision centrality, which is a similar characteristic to the hydrodynamical particle flow in A+A collisions. The structure is absent in the d-going direction as well as in p+p collisions, in the transverse-momentum range studied. The results indicate that the structure is shifted in the Au-going direction toward more central collisions, similar to the charged-particle pseudorapidity distributions. Copyright © 2017, The Authors. All rights reserved.

关键词： Germanium alloys

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