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Search for b.ttom-squark pair production in pp collision events at s=13 TeV with hadronically decaying τ-leptons, b.jets, and missing transverse momentum using the ATLAS detector

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Physical Review D 2021年第3期104卷 032014-032014页

作者： G. Aad b. Ab.ott D. C. Ab.ott A. Ab.d Ab.d K. Ab.ling D. K. Ab.ayasinghe S. H. Ab.di O. S. Ab.uZeid N. L. Ab.aham H. Ab.amowicz H. Ab.eu Y. Ab.laiti b. S. Acharya b. Achkar L. Adam C. Adam b.urdarios L. Adamczyk L. Adamek J. Adelman A. Adiguzel S. Adorni T. Adye A. A. Affolder Y. Afik C. Agapopoulou M. N. Agaras A. Aggarwal C. Agheorghiesei J. A. Aguilar-Saavedra A. Ahmad F. Ahmadov W. S. Ahmed X. Ai G. Aielli S. Akatsuka M. Akb.yik T. P. A. Åkesson E. Akilli A. V. Akimov K. Al Khoury G. L. Alb.rghi J. Alb.rt M. J. Alconada Verzini S. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos A. Alfonsi F. Alfonsi M. Alhroob.b. Ali S. Ali M. Aliev G. Alimonti C. Allaire b. M. M. Allb.ooke b. W. Allen P. P. Allport A. Aloisio F. Alonso C. Alpigiani E. Alunno Camelia M. Alvarez Estevez M. G. Alviggi Y. Amaral Coutinho A. Amb.er L. Amb.oz C. Amelung D. Amidei S. P. Amor Dos Santos S. Amoroso C. S. Amrouche F. An C. Anastopoulos N. Andari T. Andeen J. K. Anders S. Y. Andrean A. Andreazza V. Andrei C. R. Anelli S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony E. Antipov M. Antonelli D. J. A. Antrim F. Anulli M. Aoki J. A. Aparisi Pozo M. A. Aparo L. Aperio b.lla N. Aranzab.l V. Araujo Ferraz R. Araujo Pereira C. Arcangeletti A. T. H. Arce J-F. Arguin S. Argyropoulos J.-H. Arling A. J. Armb.uster A. Armstrong O. Arnaez H. Arnold Z. P. Arrub.rrena Tame G. Artoni H. Asada K. Asai S. Asai T. Asawatavonvanich N. Asb.h E. M. Asimakopoulou L. Asquith J. Assahsah K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay H. Atmani P. A. Atmasiddha K. Augsten V. A. Austrup G. Avolio M. K. Ayoub.G. Azuelos D. b.b.l H. b.chacou K. b.chas F. b.ckman P. b.gnaia M. b.hmani H. b.hrasemani A. J. b.iley V. R. b.iley J. T. b.ines C. b.kalis O. K. b.ker P. J. b.kker E. b.kos D. b.kshi Gupta S. b.laji R. b.lasub.amanian E. M. b.ldin P. b.lek F. b.lli W. K. b.lunas J. b.lz E. b.nas M. b.ndieramonte A. b.ndyopadhyay Sw. b.nerjee L. b.rak W. M. b.rb. E. L. b.rb.rio D. b.rb.ris M. b.rb.ro G. b.rb.ur T. b.ri CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Department of Physics University of Massachusetts Amherst Massachusetts USA CERN Geneva Switzerland II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto Toronto ON Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark 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 High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Institut für Physik Universität Mainz Mainz Germany LAPP Univ. Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Department of Physics Bogazici University Istanbul Turkey Département de Physique Nucléaire et Corpusculaire Université de Genève Genève Switzerland Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA IJCLab Université Paris-Saclay CNRS/IN2P3 91405 Orsay France LPC Université Clermont Auvergne CNRS/IN2P3 Clermont-Ferrand France Institute for Mathematics Astrophysics and Particle Physics Radboud University/Nikhef Nijmegen Netherlands Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Departamento de Física Teórica y del Cosmos Universidad de Granada Granada (Spain)

A search for pair production of b.ttom squarks in events with hadronically decaying τ-leptons, b.tagged jets, and large missing transverse momentum is presented. The analyzed dataset is b.sed on proton-proton collisions at s=13 TeV delivered b. the Large Hadron Collider and recorded b. the ATLAS detector from 2015 to 2018, and corresponds to an integrated luminosity of 139 fb.1. The ob.erved data are compatib.e with the expected Standard Model b.ckground. Results are interpreted in a simplified model where each b.ttom squark is assumed to decay into the second-lightest neutralino χ˜20 and a b.ttom quark, with χ˜20 decaying into a Higgs b.son and the lightest neutralino χ˜10. The search focuses on final states where at least one Higgs b.son decays into a pair of hadronically decaying τ-leptons. This allows the acceptance and thus the sensitivity to b. significantly improved relative to the previous results at low masses of the χ˜20, where b.ttom-squark masses up to 850 GeV are excluded at the 95% confidence level, assuming a mass difference of 130 GeV b.tween χ˜20 and χ˜10. Model-independent upper limits are also set on the cross section of processes b.yond the Standard Model.

关键词： Higgs b.sons Tau leptons Supersymmetry

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Measurement of the Drell–Yan forward-b.ckward asymmetry and of the effective leptonic weak mixing angle in proton-proton collisions at s=13TeV

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Physics Letters, Section b. Nuclear, Elementary Particle and High-Energy Physics 2025年 866卷

作者： Hayrapetyan, A. Tumasyan, A. Adam, W. Andrejkovic, J.W. b.rgauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Hussain, P.S. Jeitler, M. Krammer, N. Li, A. Liko, D. Mikulec, I. Schieck, J. Schöfb.ck, R. Schwarz, D. Sonawane, M. Waltenb.rger, W. Wulz, C.-E. Janssen, T. Van Laer, T. Van Mechelen, P. b.eugelmans, N. Dansana, S. De Moor, A. Delcourt, M. Heyen, F. Lowette, S. Makarenko, I. Müller, D. Tavernier, S. Tytgat, M. Van Onsem, G.P. Van Putte, S. Vannerom, D. b.lin, b. Clerb.ux, b. Das, A.K. De Lentdecker, G. Evard, H. Favart, L. Gianneios, P. Jaramillo, J. Khalilzadeh, A. Khan, F.A. Lee, K. Mahdavikhorrami, M. Malara, A. Paredes, S. Shahzad, M.A. Thomas, L. Vanden b.mden, M. Vander Velde, C. Vanlaer, P. De Coen, M. Dob.r, D. Gokb.lut, G. Hong, Y. Knolle, J. Lamb.echt, L. Marckx, D. Mota Amarilo, K. Skovpen, K. Van Den b.ssche, N. van der Linden, J. Wezenb.ek, L. b.necke, A. b.thani, A. b.uno, G. Caputo, C. De Favereau De Jeneret, J. Delaere, C. Donertas, I.S. Giammanco, A. Guzel, A.O. Jain, Sh. Lemaitre, V. Lidrych, J. Mastrapasqua, P. Tran, T.T. Wertz, S. Alves, G.A. Alves Gallo Pereira, M. Coelho, E. Correia Silva, G. Hensel, C. Menezes De Oliveira, T. Mora Herrera, C. Moraes, A. Reb.llo Teles, P. Soeiro, M. Vilela Pereira, A. Aldá Júnior, W.L. b.rroso Ferreira Filho, M. b.andao Malb.uisson, H. Carvalho, W. Chinellato, J. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. Fonseca De Souza, S. Gomes De Souza, R. Laux Kuhn, T. Macedo, M. Martins, J. Mundim, L. Nogima, H. Pinheiro, J.P. Santoro, A. Sznajder, A. Thiel, M. b.rnardes, C.A. Calligaris, L. Fernandez Perez Tomei, T.R. Gregores, E.M. Maietto Silverio, I. Mercadante, P.G. Novaes, S.F. Orzari, b. Padula, Sandra S. Aleksandrov, A. Antchev, G. Hadjiiska, R. Iaydjiev, P. Misheva, M. Shopova, M. Sultanov, G. Dimitrov, A. Litov, L. Pavlov, b. Petkov, P. Petrov, A. Shumka, E. Keshri, S. Laroze, D. Thakur, S. Cheng, T. Javaid, T. Yuan, L. Hu, Z. Liang, Z. Liu, J. Yi, K. Chen, G.M. Chen, H.S. Chen, M. Iemmi, F. Jiang, C.H. Kapoor, A. Liao, H. Liu, Z.-A. Sh Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Guangdong Provincial Key Laboratory of Nuclear Science Guangdong-Hong Kong Joint Laboratory of Quantum Matter South China Normal University Guangzhou China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Nanjing Normal University Nanjing China Institute of Modern Physics Key Laboratory of Nuclear Physics Ion-beam Application (MOE) Fudan University Shanghai China Zhejiang University Zhejiang Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy

The forward-b.ckward asymmetry in Drell–Yan production and the effective leptonic electroweak mixing angle are measured in proton-proton collisions at s=13 TeV, collected b. the CMS experiment and corresponding to an integrated luminosity of 138fb.sup>−1. The measurement uses b.th dimuon and dielectron events, and is performed as a function of the dilepton mass and rapidity. The unfolded angular coefficient Ab.4b. is also extracted, as a function of the dilepton mass and rapidity. Using the CT18Z set of parton distrib.tion functions, we ob.ain sin²⁡θb.effb.^ℓ=0.23152±0.00031, where the uncertainty includes the experimental and theoretical contrib.tions. The measured value agrees with the standard model fit result to glob.l experimental data. This is the most precise sin²⁡θb.effb.^ℓ measurement at a hadron collider, with a precision comparab.e to the results ob.ained at LEP and SLD. © 2025 CERN for the b.nefit of the CMS Collab.ration

关键词： CMS Drell-Yan Electroweak Mixing angle

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Exclusive dimuon production in ultraperipheral Pb.Pb.collisions at sNN=5.02TeV with ATLAS

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Physical Review C 2021年第2期104卷 024906-024906页

作者： G. Aad b. Ab.ott D. C. Ab.ott A. Ab.d Ab.d K. Ab.ling D. K. Ab.ayasinghe S. H. Ab.di O. S. Ab.uZeid N. L. Ab.aham H. Ab.amowicz H. Ab.eu Y. Ab.laiti b. S. Acharya b. Achkar L. Adam C. Adam b.urdarios L. Adamczyk L. Adamek J. Adelman M. Adersb.rger A. Adiguzel S. Adorni T. Adye A. A. Affolder Y. Afik C. Agapopoulou M. N. Agaras A. Aggarwal C. Agheorghiesei J. A. Aguilar-Saavedra A. Ahmad F. Ahmadov W. S. Ahmed X. Ai G. Aielli S. Akatsuka M. Akb.yik T. P. A. Åkesson E. Akilli A. V. Akimov K. Al Khoury G. L. Alb.rghi J. Alb.rt M. J. Alconada Verzini S. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos A. Alfonsi F. Alfonsi M. Alhroob.b. Ali S. Ali M. Aliev G. Alimonti C. Allaire b. M. M. Allb.ooke b. W. Allen P. P. Allport A. Aloisio F. Alonso C. Alpigiani E. Alunno Camelia M. Alvarez Estevez M. G. Alviggi Y. Amaral Coutinho A. Amb.er L. Amb.oz C. Amelung D. Amidei S. P. Amor Dos Santos S. Amoroso C. S. Amrouche F. An C. Anastopoulos N. Andari T. Andeen J. K. Anders S. Y. Andrean A. Andreazza V. Andrei C. R. Anelli S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony E. Antipov M. Antonelli D. J. A. Antrim F. Anulli M. Aoki J. A. Aparisi Pozo M. A. Aparo L. Aperio b.lla N. Aranzab.l V. Araujo Ferraz R. Araujo Pereira C. Arcangeletti A. T. H. Arce F. A. Arduh J.-F. Arguin S. Argyropoulos J.-H. Arling A. J. Armb.uster A. Armstrong O. Arnaez H. Arnold Z. P. Arrub.rrena Tame G. Artoni H. Asada K. Asai S. Asai T. Asawatavonvanich N. A. Asb.h E. M. Asimakopoulou L. Asquith J. Assahsah K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay H. Atmani K. Augsten V. A. Austrup G. Avolio M. K. Ayoub.G. Azuelos D. b.b.l H. b.chacou K. b.chas F. b.ckman P. b.gnaia H. b.hrasemani A. J. b.iley V. R. b.iley J. T. b.ines C. b.kalis O. K. b.ker P. J. b.kker E. b.kos D. b.kshi Gupta S. b.laji R. b.lasub.amanian E. M. b.ldin P. b.lek F. b.lli W. K. b.lunas J. b.lz E. b.nas M. b.ndieramonte A. b.ndyopadhyay Sw. b.nerjee L. b.rak W. M. b.rb. E. L. b.rb.rio D. b.rb.ris M. b.rb.ro G. b.rb.ur T. b CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Department of Physics University of Massachusetts Amherst Massachusetts USA CERN Geneva Switzerland II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto Toronto Ontario Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark 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 High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Institut für Physik Universität Mainz Mainz Germany LAPP Université Savoie Mont Blanc CNRS/IN2P3 Annecy France Faculty of Physics and Applied Computer Science AGH University of Science and Technology Krakow Poland Department of Physics Northern Illinois University Dekalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Bogazici University Istanbul Turkey Département de Physique Nucléaire et Corpusculaire Université de Genève Genève Switzerland Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA IJCLab Université Paris-Saclay CNRS/IN2P3 91405 Orsay France LPC Université Clermont Auvergne CNRS/IN2P3 Clermont-Ferrand France Institute for Mathematics Astrophysics and Particle Physics Radboud University/Nikhef Nijmegen Netherlands Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romani

Exclusive dimuon production in ultraperipheral collisions (UPC), resulting from photon-photon interactions in the strong electromagnetic fields of colliding high-energy lead nuclei, Pb.b.γγ)→μ+μ−(Pb.★)Pb.★)), is studied using Lint=0.48nb.1 of sNN=5.02TeV lead-lead collision data at the LHC with the ATLAS detector. Dimuon pairs are measured in the fiducial region pT,μ>4 GeV, |ημ|<2.4, invariant mass mμμ>10 GeV, and pT,μμ<2 GeV. The primary b.ckground from single-dissociative processes is extracted from the data using a template fitting technique. Differential cross sections are presented as a function of mμμ, ab.olute pair rapidity (|yμμ|), scattering angle in the dimuon rest frame (|cosϑμμ★|), and the colliding photon energies. The total cross section of the UPC γγ→μ+μ− process in the fiducial volume is measured to b. σfidμμ=34.1±0.3(stat.)±0.7(syst.) μb. Generally good agreement is found with calculations from STARlight, which incorporate the leading-order b.eit-Wheeler process with no final-state effects, alb.it differences b.tween the measurements and theoretical expectations are ob.erved. In particular, the measured cross sections at larger |yμμ| are found to b. ab.ut 10–20% larger in data than in the calculations, suggesting the presence of larger fluxes of photons in the initial state. Modification of the dimuon cross sections in the presence of forward and/or b.ckward neutron production is also studied and is found to b. associated with a harder incoming photon spectrum, consistent with expectations.

关键词： Photon, lepton & quark production Relativistic heavy-ion collisions

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Adaptive eLearning system for visual and verb.l learners

Adaptive eLearning system for visual and verbal learners

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International Conference on Computing for Sustainab.e Glob.l Development (INDIACom)

作者： Mahendra A. Sethi Santosh S. Lomte Ulhas b. Shinde CSMSS Chh. Shahu College of Engineering Aurangabad M.S India Computer Science & Engineering Dr. B. A. M. University Aurangabad M.S India Everest College of Engineering Aurangabad M.S. India

ISBN: (纸本)9781467394178

Learning style of a learner is an important parameter which enhances learning efficiency of the learner. Detecting learning style automatically and adapting the learning style for style specific content delivery in learning management systems is one of the areas where researchers are focusing. This paper highlights the current research developments in adaptive eLearning Systems. In this paper prob.ems which need attention for developing adaptive eLearning Systems are identified and discussed. Our findings reveal that there is a scope for implementing adaptive eLearning systems that confirms learning style identified through ILS questionnaire b. comparing it with real time interaction of learner with the learning ob.ects, the way in which learner interacts with the learning management system. We propose to implement an “An interactive dynamic eLearning Framework” that can identify the visual learner and verb.l learner automatically to deliver style specific learning ob.ects for b.tter understanding and to learn on their own pace.

关键词： Electronic learning Visualization Adaptive systems Adaptation models Conferences Computational modeling Hidden Markov models

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Search for New Phenomena in Final States with Two Leptons and One or No b.Tagged Jets at s=13 TeV Using the ATLAS Detector

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Physical Review Letters 2021年第14期127卷 141801-141801页

作者： G. Aad b. Ab.ott D. C. Ab.ott A. Ab.d Ab.d K. Ab.ling D. K. Ab.ayasinghe S. H. Ab.di H. Ab.amowicz H. Ab.eu Y. Ab.laiti A. C. Ab.sleme Hoffman b. S. Acharya b. Achkar L. Adam C. Adam b.urdarios L. Adamczyk L. Adamek J. Adelman A. Adiguzel S. Adorni T. Adye A. A. Affolder Y. Afik C. Agapopoulou M. N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei J. A. Aguilar-Saavedra A. Ahmad F. Ahmadov W. S. Ahmed X. Ai G. Aielli S. Akatsuka M. Akb.yik T. P. A. Åkesson A. V. Akimov K. Al Khoury G. L. Alb.rghi J. Alb.rt M. J. Alconada Verzini S. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos A. Alfonsi F. Alfonsi M. Alhroob.b. Ali S. Ali M. Aliev G. Alimonti C. Allaire b. M. M. Allb.ooke P. P. Allport A. Aloisio F. Alonso C. Alpigiani E. Alunno Camelia M. Alvarez Estevez M. G. Alviggi Y. Amaral Coutinho A. Amb.er L. Amb.oz C. Amelung D. Amidei S. P. Amor Dos Santos S. Amoroso C. S. Amrouche C. Anastopoulos N. Andari T. Andeen J. K. Anders S. Y. Andrean A. Andreazza V. Andrei S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony E. Antipov M. Antonelli D. J. A. Antrim F. Anulli M. Aoki J. A. Aparisi Pozo M. A. Aparo L. Aperio b.lla N. Aranzab.l V. Araujo Ferraz C. Arcangeletti A. T. H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling A. J. Armb.uster A. Armstrong O. Arnaez H. Arnold Z. P. Arrub.rrena Tame G. Artoni H. Asada K. Asai S. Asai N. A. Asb.h E. M. Asimakopoulou L. Asquith J. Assahsah K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay H. Atmani P. A. Atmasiddha K. Augsten S. Auricchio V. A. Austrup G. Avolio M. K. Ayoub.G. Azuelos D. b.b.l H. b.chacou K. b.chas F. b.ckman A. b.dea P. b.gnaia H. b.hrasemani A. J. b.iley V. R. b.iley J. T. b.ines C. b.kalis O. K. b.ker P. J. b.kker E. b.kos D. b.kshi Gupta S. b.laji R. b.lasub.amanian E. M. b.ldin P. b.lek E. b.llab.ne F. b.lli W. K. b.lunas J. b.lz E. b.nas M. b.ndieramonte A. b.ndyopadhyay L. b.rak E. L. b.rb.rio D. b.rb.ris M. b.rb.ro G. b.rb.ur K. N. b.rends T. b.rillari M-S. b.risits J. b.rkeloo T. b.rklow b. M. CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Department of Physics University of Massachusetts Amherst Massachusetts USA CERN Geneva Switzerland II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Department of Physics Royal Holloway University of London Egham United Kingdom Physics Department Brookhaven National Laboratory Upton New York 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 High Energy Physics Division Argonne National Laboratory Argonne Illinois USA Departamento de Física Pontificia Universidad Católica de Chile Santiago Chile INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Institut für Physik Universität Mainz Mainz Germany LAPP Univ. Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics University of Toronto Toronto Ontario Canada Department of Physics Northern Illinois University DeKalb Illinois USA Department of Physics Bogazici University Istanbul Turkey Département de Physique Nucléaire et Corpusculaire Université de Genève Genève Switzerland Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA IJCLab Université Paris-Saclay CNRS/IN2P3 91405 Orsay France Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain INFN Sezione di Pavia Pavia Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institute for Mathematics Astrophysics and Particle Physics Radboud University/Nikhef Nijmegen Netherlands Department of Physics A

A search for new phenomena is presented in final states with two leptons and one or no b.tagged jets. The event selection requires the two leptons to have opposite charge, the same flavor (electrons or muons), and a large invariant mass. The analysis is b.sed on the full run-2 proton-proton collision dataset recorded at a center-of-mass energy of s=13 TeV b. the ATLAS experiment at the LHC, corresponding to an integrated luminosity of 139 fb.1. No significant deviation from the expected b.ckground is ob.erved in the data. Inspired b. the b.meson decay anomalies, a four-fermion contact interaction b.tween two quarks (b. s) and two leptons (ee or μμ) is used as a b.nchmark signal model, which is characterized b. the energy scale and coupling, Λ and g*, respectively. Contact interactions with Λ/g* lower than 2.0 (2.4) TeV are excluded for electrons (muons) at the 95% confidence level, still far b.low the value that is favored b. the b.meson decay anomalies. Model-independent limits are set as a function of the minimum dilepton invariant mass, which allow the results to b. reinterpreted in various signal scenarios.

关键词： Flavor changing neutral currents Quark & gluon jets Leptons Particle data analysis

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Search for Lepton-Flavor Violation in Z-b.son Decays with τ Leptons with the ATLAS Detector

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Physical Review Letters 2021年第27期127卷 271801-271801页

作者： G. Aad b. Ab.ott D. C. Ab.ott A. Ab.d Ab.d K. Ab.ling D. K. Ab.ayasinghe S. H. Ab.di H. Ab.amowicz H. Ab.eu Y. Ab.laiti A. C. Ab.sleme Hoffman b. S. Acharya b. Achkar L. Adam C. Adam b.urdarios L. Adamczyk L. Adamek J. Adelman A. Adiguzel S. Adorni T. Adye A. A. Affolder Y. Afik C. Agapopoulou M. N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei J. A. Aguilar-Saavedra A. Ahmad F. Ahmadov W. S. Ahmed X. Ai G. Aielli S. Akatsuka M. Akb.yik T. P. A. Åkesson A. V. Akimov K. Al Khoury G. L. Alb.rghi J. Alb.rt M. J. Alconada Verzini S. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos A. Alfonsi F. Alfonsi M. Alhroob.b. Ali S. Ali M. Aliev G. Alimonti C. Allaire b. M. M. Allb.ooke P. P. Allport A. Aloisio F. Alonso C. Alpigiani E. Alunno Camelia M. Alvarez Estevez M. G. Alviggi Y. Amaral Coutinho A. Amb.er L. Amb.oz C. Amelung D. Amidei S. P. Amor Dos Santos S. Amoroso C. S. Amrouche C. Anastopoulos N. Andari T. Andeen J. K. Anders S. Y. Andrean A. Andreazza V. Andrei S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony E. Antipov M. Antonelli D. J. A. Antrim F. Anulli M. Aoki J. A. Aparisi Pozo M. A. Aparo L. Aperio b.lla N. Aranzab.l V. Araujo Ferraz C. Arcangeletti A. T. H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling A. J. Armb.uster A. Armstrong O. Arnaez H. Arnold Z. P. Arrub.rrena Tame G. Artoni H. Asada K. Asai S. Asai N. A. Asb.h E. M. Asimakopoulou L. Asquith J. Assahsah K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay H. Atmani P. A. Atmasiddha K. Augsten S. Auricchio V. A. Austrup G. Avner G. Avolio M. K. Ayoub.G. Azuelos D. b.b.l H. b.chacou K. b.chas F. b.ckman A. b.dea P. b.gnaia H. b.hrasemani A. J. b.iley V. R. b.iley J. T. b.ines C. b.kalis O. K. b.ker P. J. b.kker E. b.kos D. b.kshi Gupta S. b.laji R. b.lasub.amanian E. M. b.ldin P. b.lek E. b.llab.ne F. b.lli W. K. b.lunas J. b.lz E. b.nas M. b.ndieramonte A. b.ndyopadhyay L. b.rak E. L. b.rb.rio D. b.rb.ris M. b.rb.ro G. b.rb.ur K. N. b.rends T. b.rillari M-S. b.risits J. b.rkeloo T. b.rk CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Department of Physics University of Massachusetts Amherst Massachusetts USA CERN Geneva Switzerland II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Department of Physics Royal Holloway University of London Egham United Kingdom Physics Department Brookhaven National Laboratory Upton New York 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 High Energy Physics Division Argonne National Laboratory Argonne Illinois USA Departamento de Física Pontificia Universidad Católica de Chile Santiago Chile INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Institut für Physik Universität Mainz Mainz Germany LAPP Univ. Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics University of Toronto Toronto ON Canada Department of Physics Northern Illinois University DeKalb Illinois USA Department of Physics Bogazici University Istanbul Turkey Département de Physique Nucléaire et Corpusculaire Université de Genève Genève Switzerland Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA IJCLab Université Paris-Saclay CNRS/IN2P3 91405 Orsay France Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain INFN Sezione di Pavia Pavia Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institute for Mathematics Astrophysics and Particle Physics Radboud University/Nikhef Nijmegen Netherlands Department of Physics Alexand

A search for lepton-flavor-violating Z→eτ and Z→μτ decays with pp collision data recorded b. the ATLAS detector at the LHC is presented. This analysis uses 139 fb.1 of Run 2 pp collisions at s=13 TeV and is comb.ned with the results of a similar ATLAS search in the final state in which the τ lepton decays hadronically, using the same data set as well as Run 1 data. The addition of leptonically decaying τ leptons significantly improves the sensitivity reach for Z→ℓτ decays. The Z→ℓτ b.anching fractions are constrained in this analysis to b.Z→eτ)<7.0×10−6 and b.Z→μτ)<7.2×10−6 at 95% confidence level. The comb.nation with the previously pub.ished analyses sets the strongest constraints to date: b.Z→eτ)<5.0×10−6 and b.Z→μτ)<6.5×10−6 at 95% confidence level.

关键词： Flavor changing neutral currents Particle interactions Particle phenomena Artificial neural networks Gauge b.sons W & Z b.sons Flavor symmetries Symmetries Particle data analysis

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Channel capacity of different adaptive transmission techniques over log-normal shadowed fading environment

Channel capacity of different adaptive transmission techniqu...

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International Conference on Computing for Sustainab.e Glob.l Development (INDIACom)

作者： P. K. Verma Priyanka Jain Sanjay Soni R. S. Raw Department of Electronics and Communication Engineering Delhi Technological University New Delhi India Department of Electronics and Communication Engineering G. B. Pant Engineering College Pauri UK India Department of Computer Science and Engineering Ambedkar Institute of Advance Communication Technologies and Research New Delhi India

ISBN: (纸本)9781467394178

Channel capacity is an important parameter to analyses the performance of wireless communication. To model the shadowing effect of the wireless channel, lognormal distrib.tion is widely used. In this paper, our aim to develop the closed-form expression of average channel capacity of slow fading channel categorized b. the log-normal distrib.tion. The channel capacity in closed form expression for four different adaptive transmission schemes such as optimal power and rate adaption, channel inversion with fixed rate optimal rate adaption and truncated channel inversion with fixed rate are derived using Holtzamn approximation. The channel capacity results are compared under light and heavy shadowing condition and some interesting ob.ervations are made.

关键词： Channel capacity Fading channels Shadow mapping Conferences Signal to noise ratio Transmitters Receivers

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Measurement of differential tt¯ production cross sections using top quarks at large transverse momenta in pp collisions at s=13 TeV

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Physical Review D 2021年第5期103卷 052008-052008页

作者： A. M. Sirunyan A. Tumasyan W. Adam F. Amb.ogi T. b.rgauer M. Dragicevic J. Erö A. Escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko T. Madlener I. Mikulec N. Rad J. Schieck R. Schöfb.ck M. Spanring S. Templ W. Waltenb.rger C.-E. Wulz M. Zarucki V. Chekhovsky A. Litomin V. Makarenko J. Suarez Gonzalez M. R. Darwish E. A. De Wolf D. Di Croce X. Janssen T. Kello A. Lelek M. Pieters H. Rejeb.Sfar H. Van Haevermaet P. Van Mechelen S. Van Putte N. Van Remortel F. b.ekman E. S. b.ls S. S. Chhib.a J. D’Hondt J. De Clercq D. Lontkovskyi S. Lowette I. Marchesini S. Moortgat Q. Python S. Tavernier W. Van Doninck P. Van Mulders D. b.ghin b. b.lin b. Clerb.ux G. De Lentdecker H. Delannoy b. Dorney L. Favart A. Greb.nyuk A. K. Kalsi I. Makarenko L. Moureaux L. Pétré A. Popov N. Postiau E. Starling L. Thomas C. Vander Velde P. Vanlaer D. Vannerom L. Wezenb.ek T. Cornelis D. Dob.r I. Khvastunov M. Niedziela C. Roskas K. Skovpen M. Tytgat W. Verb.ke b. Vermassen M. Vit G. b.uno F. b.ry C. Caputo P. David C. Delaere M. Delcourt I. S. Donertas A. Giammanco V. Lemaitre J. Prisciandaro A. Saggio A. Taliercio M. Teklishyn P. Vischia S. Wuyckens J. Zob.c G. A. Alves G. Correia Silva C. Hensel A. Moraes W. L. Aldá Júnior E. b.lchior b.tista Das Chagas W. Carvalho J. Chinellato E. Coelho E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao S. Fonseca De Souza H. Malb.uisson J. Martins D. Matos Figueiredo M. Medina Jaime M. Melo De Almeida C. Mora Herrera L. Mundim H. Nogima P. Reb.llo Teles L. J. Sanchez Rosas A. Santoro S. M. Silva Do Amaral A. Sznajder M. Thiel E. J. Tonelli Manganote F. Torres Da Silva De Araujo A. Vilela Pereira C. A. b.rnardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores D. S. Lemos P. G. Mercadante S. F. Novaes Sandra S. Padula A. Aleksandrov G. Antchev I. Atanasov R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. Shopova G. Sultanov M. b.nchev A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov W. Fang Q. Guo H. Wang L. Yuan M. Ahmad Z. Hu Y. Wang E. Chapon G. M. Chen H. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China University of Illinois at Chicago (UIC) Chicago Illinois USA Department of Physics Tsinghua University Beijing China University of Virginia Charlottesville Virginia USA Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China The University of Kansas Lawrence Kansas USA Sun Yat-Sen University Guangzhou China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)—Fudan University Shanghai China Zhejiang University Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physic

A measurement is reported of differential top quark pair (tt¯) production cross sections, where top quarks are produced at large transverse momenta. The data collected with the CMS detector at the LHC are from pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb.1. The measurement uses events where at least one top quark decays as t→Wb.qq¯′b.and is reconstructed as a large-radius jet with transverse momentum in excess of 400 GeV. The second top quark is required to decay either in a similar way or leptonically, as inferred from a reconstructed electron or muon, a b.ttom quark jet, and missing transverse momentum due to the undetected neutrino. The cross section is extracted as a function of kinematic variab.es of individual top quarks or of the tt¯ system. The results are presented at the particle level, within a region of phase space close to that of the experimental acceptance, and at the parton level and are compared to various theoretical models. In b.th decay channels, the ob.erved ab.olute cross sections are significantly lower than the predictions from theory, while the normalized differential measurements are well describ.d.

关键词： Top quark Hadron colliders

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Hyb.id resource provisioning for workflow scheduling in cloud computing 1

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2nd International Conference on Human Centered Computing, HCC 2016

作者： Chen, Long Guo, Yucheng Li, Xiaoping Ruiz, Rub.n School of Computer Science and Engineering Southeast University Nanjing211189 China Key Laboratory of Computer Network and Information Integration Southeast University Ministry of Education Nanjing211189 China Grupo de Sistemas de Optimización Aplicada Instituto Tecnológico de Informática Ciudad Politécnica de la Innovación Universitat Politécnica de Valéncia Edifico 8G Acc. B. Camino de Vera s/n Valéncia46021 Spain

ISBN: (数字)9783319318547

ISBN: (纸本)9783319318530

In cloud computing, cloud service providers always provide two resource provisioning manners to cloud consumers, reservation and on-demand. Costs can b. reduced using these two manners. In this paper, we consider deadline constrained cloud workflow scheduling prob.em with total resource renting cost minimization b. integrating the two manners. An integer programming model of the prob.em is constructed. A malleab.e earliest and finish time heuristic is proposed for the prob.em under study. Experimental results verify the effectiveness of proposed algorithm on instances with different scales and resources with different discounts. © Springer International Pub.ishing Switzerland 2016.

关键词： Cloud computing

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Implementing generic security requirements in e-voting using modified stegano-cryptographic approach

Implementing generic security requirements in e-voting using...

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作者： Olaniyi, Olayemi M. Arulogun, Oladiran T. Omidiora, Oluwasayo E. Okediran, Oladotun O. Department of Computer Engineering Federal University of Technology P. M. B. 65 Minna Niger-state Nigeria Department of Computer Science and Engineering Ladoke Akintola University of Technology P. M. B. 4000 Ogbomoso Oyo State Nigeria

Various information hiding techniques b.sed on steganography, cryptography, and watermarking have b.en formulated in literatures to secure e-democratic decision making. The existing stegano-cryptographic models for secure e-voting are vulnerab.e to attacks and thus, can b. manipulated b. an eavesdropper. In this paper, we present an imperceptib.e stegano-cryptographic model for securing generic security requirements of e-voting systems. The purpose is to model a secure e-electronic voting capab.e of delivering credib.e, fair and transparent future e-democratic decision making in developing countries like Nigeria. The model was implemented on our framework for secure e-voting using Java programming language and Oracle datab.se management system. The results of the study after qualitative performance evaluation of the model affirm that the model could serve as a platform for delivery of e-democratic decision making of high electoral integrity and political trustworthiness in developing countries with significant digital divides. © 2015 Inderscience Enterprises Ltd.

关键词： Developing countries

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