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Two-particle azimuthal correlations in photonuclear ultraperipheral Pb.Pb.collisions at 5.02 TeV with ATLAS

Physical Review C 2021年第1期104卷 014903-014903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 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 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 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 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 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 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 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 L. b.rak W. M. b.rb. 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.rkl 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 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 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 Université 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 LPC Université Clermont Auvergne CNRS/IN2P3 Clermont-Ferrand France Institute for Mathematics Astrophysics and Particle Physics Radboud University/Nikhef Nijmegen Netherlan

Two-particle long-range azimuthal correlations are measured in photonuclear collisions using 1.7nb.1 of 5.02 TeV Pb.Pb.collision data collected b. the ATLAS experiment at the CERN Large Hadron Collider. Candidate events are selected using a dedicated high-multiplicity photonuclear event trigger, a comb.nation of information from the zero-degree calorimeters and forward calorimeters, and from pseudorapidity gaps constructed using calorimeter energy clusters and charged-particle tracks. Distrib.tions of event properties are compared b.tween data and Monte Carlo simulations of photonuclear processes. Two-particle correlation functions are formed using charged-particle tracks in the selected events, and a template-fitting method is employed to sub.ract the nonflow contrib.tion to the correlation. Significant nonzero values of the second- and third-order flow coefficients are ob.erved and presented as a function of charged-particle multiplicity and transverse momentum. The results are compared with flow coefficients ob.ained in proton-proton and proton-lead collisions in similar multiplicity ranges, and with theoretical expectations. The unique initial conditions present in this measurement provide a new way to prob. the origin of the collective signatures previously ob.erved only in hadronic collisions.

关键词： Nucleon-nucleon interactions Photonuclear reactions Relativistic heavy-ion collisions

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Search for new phenomena in pp collisions in final states with tau leptons, b.jets, and missing transverse momentum with the ATLAS detector

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Physical Review D 2021年第11期104卷 112005-112005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 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 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 Niels Bohr Institute University of Copenhagen Copenhagen Denmark 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 United States of America 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 Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institute for Mathematics Astrophysics and Particle Physics Rad

A search for new phenomena in final states with hadronically decaying tau leptons, b.jets, and missing transverse momentum is presented. The analyzed dataset comprises pp collision data at a center-of-mass energy of s=13 TeV with an integrated luminosity of 139 fb.1, delivered b. the Large Hadron Collider and recorded with the ATLAS detector from 2015 to 2018. The ob.erved data are compatib.e with the expected Standard Model b.ckground. The results are interpreted in simplified models for two different scenarios. The first model is b.sed on supersymmetry and considers pair production of top squarks, each of which decays into a b.quark, a neutrino and a tau slepton. Each tau slepton in turn decays into a tau lepton and a nearly massless gravitino. Within this model, top-squark masses up to 1.4 TeV can b. excluded at the 95% confidence level over a wide range of tau-slepton masses. The second model considers pair production of leptoquarks with decays into third-generation leptons and quarks. Depending on the b.anching fraction into charged leptons, leptoquarks with masses up to around 1.25 TeV can b. excluded at the 95% confidence level for the case of scalar leptoquarks and up to 1.8 TeV (1.5 TeV) for vector leptoquarks in a Yang–Mills (minimal-coupling) scenario. In addition, model-independent upper limits are set on the cross section of processes b.yond the Standard Model.

关键词： b.ttom quark Leptoquarks Tau leptons Supersymmetry

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Euclid: Early Release Ob.ervations – A preview of the Euclid era through a galaxy cluster magnifying lens

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Astronomy and Astrophysics 2025年 697卷

作者： Atek, H. Gavazzi, R. Weaver, J.R. Diego, J.M. Schrab.ack, T. Hatch, N.A. Aghanim, N. Dole, H. Hartley, W.G. Taamoli, S. Congedo, G. Jimenez-Teja, Y. Cuillandre, J.-C. b.ñados, E. b.lladitta, S. b.wler, R.A.A. Franco, M. Jauzac, M. Mahler, G. Richard, J. Rocci, P.-F. Serjeant, S. Toft, S. Ab.iola, D. b.rgamini, P. b.viano, A. Dimauro, P. Ezziati, M. Golden-Marx, J.b. Grillo, C. Hughes, A.C.N. Kang, Y. Kneib. J.-P. Lomb.rdi, M. Mamon, G.A. McPartland, C.J.R. Meneghetti, M. Miyatake, H. Montes, M. Mortlock, D.J. Oesch, P.A. Okab., N. Rosati, P. Taylor, A.N. Tarsitano, F. Weller, J. Kluge, M. Laureijs, R. Paltani, S. Saifollahi, T. Schirmer, M. Stone, C. Mora, A. Altieri, b. Amara, A. Andreon, S. Auricchio, N. b.ldi, M. b.lestra, A. b.rdelli, S. b.sset, A. b.nder, R. b.dendorf, C. b.nino, D. b.anchini, E. b.escia, M. b.inchmann, J. Camera, S. Candini, G.P. Capob.anco, V. Carb.ne, C. Cardone, V.F. Carretero, J. Casas, S. Castander, F.J. Castellano, M. Cavuoti, S. Cimatti, A. Conselice, C.J. Conversi, L. Copin, Y. Corcione, L. Courb.n, F. Courtois, H.M. Da Silva, A. Degaudenzi, H. Di Giorgio, A.M. Dinis, J. Douspis, M. Dub.th, F. Dupac, X. Dusini, S. Ealet, A. Farina, M. Farrens, S. Ferriol, S. Fotopoulou, S. Frailis, M. Franceschi, E. Galeotta, S. Gillard, W. Gillis, b. Giocoli, C. Gómez-Alvarez, P. Grazian, A. Grupp, F. Guzzo, L. Hailey, M. Haugan, S.V.H. Hoar, J. Hoekstra, H. Holliman, M.S. Institut d’Astrophysique de Paris UMR 7095 CNRS Sorbonne Université 98 bis boulevard Arago Paris75014 France Aix-Marseille Université CNRS CNES LAM Marseille France Department of Astronomy University of Massachusetts AmherstMA01003 United States Instituto de Física de Cantabria Edificio Juan Jordá Avenida de los Castros Santander39005 Spain Universität Innsbruck Institut für Astro- und Teilchenphysik Technikerstr. 25/8 Innsbruck6020 Austria School of Physics and Astronomy University of Nottingham University Park NottinghamNG7 2RD United Kingdom Université Paris-Saclay CNRS Institut d’astrophysique spatiale Orsay91405 France Department of Astronomy University of Geneva ch. d’Ecogia 16 Versoix1290 Switzerland Physics and Astronomy Department University of California 900 University Ave. RiversideCA92521 United States Institute for Astronomy University of Edinburgh Royal Observatory Blackford Hill EdinburghEH9 3HJ United Kingdom Instituto de Astrofísica de Andalucía CSIC Glorieta de la Astronomía Granada18080 Spain Observatorio Nacional Rua General Jose Cristino 77-Bairro Imperial de Sao Cristovao Rio de Janeiro20921-400 Brazil Université Paris-Saclay Université Paris Cité CEA CNRS AIM Gif-sur-Yvette91191 France Max-Planck-Institut für Astronomie Königstuhl 17 Heidelberg69117 Germany INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna Via Piero Gobetti 93/3 Bologna40129 Italy Jodrell Bank Centre for Astrophysics Department of Physics and Astronomy University of Manchester Oxford Road ManchesterM13 9PL United Kingdom The University of Texas at Austin AustinTX78712 United States Department of Physics Centre for Extragalactic Astronomy Durham University South Road DH1 3LE United Kingdom Department of Physics Institute for Computational Cosmology Durham University South Road DH1 3LE United Kingdom Astrophysics Research Centre University of KwaZulu-Natal Westville Campus Durban4041 South Africa School of

We present the first analysis of the Euclid Early Release Ob.ervations (ERO) program that targets fields around two lensing clusters, Ab.ll 2390 and Ab.ll 2764. We use imaging data from the Visib.e instrument (VIS) and the Near-Infrared Spectrometer and Photometer (NISP) to produce photometric catalogs for a total of ∼500 000 ob.ects. The imaging data reach a typical depth of 5 σ in the range 25.1–25.4 Ab.in the NISP b.nds and 27.1–27.3 Ab.in the VIS b.nd. Using the Lyman-b.eak method in comb.nation with photometric redshifts, we searched for high-redshift galaxies. We identified 30 Lyman-b.eak galaxy (Lb.) candidates at z > 6 and 139 extremely red sources (ERSs), most of which likely lie at lower redshift. The VIS imaging is deeper than the NISP imaging, which means that we can routinely identify high-redshift Lyman-b.eak galaxies at ab.ut a magnitude of 3, which reduces contamination b. b.own dwarf stars and low-redshift galaxies. The difficulty of spatially resolving most of these sources in 0′′ . 3 pix−1 imaging means that it is difficult to distinguish b.tween galaxies and quasars. Spectroscopic follow-up campaigns of these b.ight sources will help us to constrain the b.ight end of the ultraviolet galaxy luminosity function and the quasar luminosity function at z > 6, and it will constrain the physical nature of these ob.ects. Additionally, we performed a comb.ned strong- and weak-lensing analysis of A2390, and we show that Euclid will contrib.te to constraining the virial mass of galaxy clusters b.tter. We also identify optical and near-infrared counterparts of known z > 0.6 clusters in these data. These counterparts exhib.t strong-lensing features. This estab.ishes that Euclid can characterize high-redshift clusters. Finally, we provide a glimpse of the ab.lity of Euclid to map the intracluster light out to larger radii than current facilities, which enab.es us to understand the cluster assemb.y history b.tter and to map the dark matter distrib.tion. This ini

关键词： Moon

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A novel circuit design of true random numb.r generator using magnetic tunnel junction

A novel circuit design of true random number generator using...

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IEEE International Symposium on Nanoscale Architectures (NANOARCH)

作者： You Wang Hao Cai Lirida A. b. Naviner Jacques-Olivier Klein Jianlei Yang Weisheng Zhao Lirida A. B. Naviner LTCI-CNRS-UMR 5141 Télécorn-Paris Tech Paris France TELECOM ParisTech Paris ÃŽle-de-France FR School of Computer Science and Engineering Beihang University Beijing China Spin Interdisciplinary Center Beihang University Beijing China Beihang University Beijing CN

ISBN: (纸本)9781467389273

Random numb.rs are widely used in the cryptography and security systems. However, most of the true random numb.r generators (TRNG) which use physical randomness are with high complexity and high power consumption. This paper proposes a new TRNG circuit using magnetic tunnel junction (MTJ). As one of the reliab.lity issues in MTJ b.sed circuit, the stochastic switching b.havior provides a perfect physical source of randomness. The functionality of proposed design is validated b. transient simulations with 28nm fully depleted silicon-on-insulator (FDSOI) technology and an accurate MTJ compact model. Simulation results show that our design can generate accurate random b.tstream stab.y. The reliab.lity analysis concerning process variation of MTJs and transistors proves the good variab.lity tolerance of our TRNG design. Furthermore, our design can output stab.e random b.tstream around 30 tuning steps.

关键词： Switches Magnetic tunneling Stochastic processes Switching circuits Semiconductor device modeling Integrated circuit modeling Magnetization

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Search for charginos and neutralinos in final states with two b.osted hadronically decaying b.sons and missing transverse momentum in pp collisions at s=13 TeV with the ATLAS detector

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Physical Review D 2021年第11期104卷 112010-112010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 S. V. Addepalli 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 I. Aizenb.rg S. Akatsuka M. Akb.yik T. P. A. Åkesson A. V. Akimov K. Al Khoury G. L. Alb.rghi J. Alb.rt P. Alb.cocco 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 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 A. b.chiu 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 S. b.nsal L. b.rak E. L. b.rb.rio D. b.rb.ris M. b.rb.ro G. b.rb.ur K. N. 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 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 Brandeis University Waltham Massachusetts USA 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 Italy Dipartimento di Fisica Università di Pavia Pavia Italy Institute for Mathematics Astrophysics and Particle Physics Radboud Univers

A search for charginos and neutralinos at the Large Hadron Collider using fully hadronic final states and missing transverse momentum is reported. Pair-produced charginos or neutralinos are explored, each decaying into a high-pT Standard Model weak b.son. Fully hadronic final states are studied to exploit the advantage of the large b.anching ratio, and the efficient rejection of b.ckgrounds b. identifying the high-pT b.sons using large-radius jets and jet sub.tructure information. An integrated luminosity of 139 fb.1 of proton-proton collision data collected b. the ATLAS detector at a center-of-mass energy of 13 TeV is used. No significant excess is found b.yond the Standard Model expectation. Exclusion limits at the 95% confidence level are set on wino or higgsino production with various assumptions ab.ut the decay b.anching ratios and the type of lightest supersymmetric particle. A wino (higgsino) mass up to 1060 (900) GeV is excluded when the lightest supersymmetry particle mass is b.low 400 (240) GeV and the mass splitting is larger than 400 (450) GeV. The sensitivity to high-mass winos and higgsinos is significantly extended relative to previous LHC searches using other final states.

关键词： Extensions of Higgs sector Extensions of gauge sector Supersymmetric models Higgs b.sons Hypothetical gauge b.sons W & Z b.sons Supersymmetry Hadron colliders Multi-purpose particle detectors

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Molecular modeling of b.omolecular hydrogen gas sensor using GaAs nanopore electrode

Molecular modeling of biomolecular hydrogen gas sensor using...

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International Conference on Devices, Circuits and Systems (ICDCS)

作者： Deb.rati Dey Pradipta Roy Deb.shis De Timam Ghosh Department of Computer Science & Engineering Maulana Abul Kalam Azad University of Technology Kolkata West Bengal India Department of Electronic & Communication Engineering B. P. Poddar Institute of Management & Technology Kolkata West Bengal India Department of Physics University of Western Australia Perth WA Australia

ISBN: (纸本)9781509023103

This article presents an atomic scale model of single strand DNA b.sed Hydrogen gas sensor using Density Functional Theory conjugated with Non-Equilib.ium Green's Function b.sed first principle approach. This device is designed to detect the presence of Hydrogen gas through its current-voltage response and b. change in conductivity. The quantum transport property of the gas sensor shows that when the DNA molecules adsorb.d Hydrogen gas then the quantum transmission of the b.omolecules has b.en increased even at room temperature operation. The adsorb.d gas particles play an important role in the quantum b.llistic transmission of the b.omolecular gas sensor which results in the creation of sharp transmission peaks near Fermi level. Though weak coupling exists b.tween the b.omolecules and electrodes in the Coulomb.b.ockade regime b.t still it encourages incoherent transmission which results in sequential tunneling. During Hydrogen gas adsorption the tunneling capab.lity is modified and results in strong quantum transmission. Single strand DNA is ab.e to detect the presence of Hydrogen gas when it is coupled with a Gallium Arsenide nanopore two prob. electrodes. First principle results reveal that significantly large current is achieved due to the sensitivity of the DNA molecules in the presence of Hydrogen gas. These theoretical analyses suggest that DNA is ab.e to detect and monitor the presence of Hydrogen atoms after charge stab.lization in Coulomb.b.ockade regime and also under controlled b.as voltages. The current and conductivity of the b.omolecules increase dramatically upon the adsorption of Hydrogen, which suggests that this system has potential application as a b.omolecular sensor.

关键词： Hydrogen Electrodes Conductivity Adsorption Gas detectors DNA Gallium arsenide

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An Analytic Model to Optimize Search Results Using Collab.rative Searching Methods

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Procedia computer science 2015年 57卷 1255-1264页

作者： Analp Pathak Partha Sarathi Chakrab.rty Semanti Sinha Mahapatra Assistant Professor Department of Computer Science and Engineering SRM University Chennai India B. Tech. CSE Student Department of Computer Science and Engineering SRM University Chennai India

In this paper, we present the idea of an ‘Analytic Search Engine Model’ that utilizes the regularly generated social media data for opinion formation. It comb.nes the user ratings from different SNS platforms and analyzes them to form a collective opinion ab.ut a local b.siness and ranks results in terms of this opinion formation, which ensures the reliab.lity and quality of search results. This new mode of ranking web.pages is termed as social rank, which is explained in this paper in details. It also gives the introduction to analytic search engine model, its architecture and the prob.ems it may meet in future are presented.

关键词： Search Engine Social Search Engine Real Time Search Engine Analytic Search Engine Model Social Rank Socialytics

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Efficient b.nded Channel Assignment in IEEE 802.11 WLAN with Heterogeneous Clients 2015

Efficient Bonded Channel Assignment in IEEE 802.11 WLAN with...

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13th International Conference on Advances in Mob.le Computing and Multimedia, MoMM 2015

作者： Tewari, b.b.l P. Ghosh, Sasthi C. Department of Computer Science and Engineering Dr. B. C. Roy Engineering College Durgapur 713 206 West-Bengal India Advanced Computing and Microelectronics Unit Indian Statistical Institute 203 B. T. Road Kolkata700 108 India

ISBN: (纸本)9781450334938

Channel b.nding allows IEEE 802.11n clients to operate at a maximum rate of 300 Mb.s which can significantly improve the network throughput. b.t at the same time it increases the co-channel interference to the nearb. APs leading to a degradation of network throughput. The issue b.comes more serious when the network consists of heterogeneous clients. An inappropriate assignment of b.nded channels to the APs may penalize the legacy clients served b. other APs. Furthermore, activating the APs with non-b.nded channels only may also penalize the n clients. In b.th cases the network throughput may b. compromised. In this paper we propose an efficient b.nded channel assignment algorithm addressing how efficiently a b.nded channel can b. used together with non-b.nded channels to maximize the network throughput. Through extensive simulation we have shown that the proposed approach is efficient enough in terms of b.th network throughput and client fairness. © 2015 ACM.

关键词： IEEE Standards

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Search for a Narrow Resonance Lighter than 200 GeV Decaying to a Pair of Muons in Proton-Proton Collisions at s=13 TeV

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Physical Review Letters 2020年第13期124卷 131802-131802页

作者： A. M. Sirunyan A. Tumasyan W. Adam F. Amb.ogi T. b.rgauer M. Dragicevic J. Erö A. Escalante Del Valle M. Flechl R. Frühwirth M. Jeitler N. Krammer I. Krätschmer D. Liko T. Madlener I. Mikulec N. Rad J. Schieck R. Schöfb.ck M. Spanring D. Spitzb.rt W. Waltenb.rger C.-E. Wulz M. Zarucki V. Drugakov V. Mossolov J. Suarez Gonzalez M. R. Darwish E. A. De Wolf D. Di Croce X. Janssen 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 K. Skovpen 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 A. Popov N. Postiau E. Starling L. Thomas C. Vander Velde P. Vanlaer D. Vannerom T. Cornelis D. Dob.r I. Khvastunov M. Niedziela C. Roskas M. Tytgat W. Verb.ke b. Vermassen M. Vit O. b.ndu G. b.uno C. Caputo P. David C. Delaere M. Delcourt A. Giammanco V. Lemaitre J. Prisciandaro A. Saggio M. Vidal Marono P. Vischia J. Zob.c F. L. Alves G. A. Alves G. Correia Silva C. Hensel A. Moraes P. Reb.llo Teles 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 C. De Oliveira Martins S. Fonseca De Souza L. M. Huertas Guativa H. Malb.uisson J. Martins D. Matos Figueiredo M. Medina Jaime M. Melo De Almeida C. Mora Herrera L. Mundim H. Nogima W. L. Prado Da Silva L. J. Sanchez Rosas A. Santoro 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 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 W. Fang X. Gao L. Yuan M. Ahmad Z. Hu Y. Wang G. M. Chen H. S. Chen M. Chen C. H. Jiang D. Leggat H. Liao Z. Liu A. Spiezia J. Tao E. Yazgan H. Zhang 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 National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Department of Physics Tsinghua University Beijing China University of Virginia Charlottesville Virginia USA Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China The University of Kansas Lawrence Kansas USA 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 National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Un

A search is presented for a narrow resonance decaying to a pair of oppositely charged muons using s=13 TeV proton-proton collision data recorded at the LHC. In the 45–75 and 110–200 GeV resonance mass ranges, the search is b.sed on conventional triggering and event reconstruction techniques. In the 11.5–45 GeV mass range, the search uses data collected with dimuon triggers with low transverse momentum thresholds, recorded at high rate b. storing a reduced amount of trigger-level information. The data correspond to integrated luminosities of 137 and 96.6 fb.1 for conventional and high-rate triggering, respectively. No significant resonant peaks are ob.erved in the prob.d mass ranges. The search sets the most stringent constraints to date on a dark photon in the ∼30–75 and 110–200 GeV mass ranges.

关键词： Hypothetical gauge b.sons Muons Hadron colliders

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Constraints on the χc1 versus χc2 Polarizations in Proton-Proton Collisions at s=8 TeV

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Physical Review Letters 2020年第16期124卷 162002-162002页

作者： A. M. Sirunyan A. Tumasyan W. Adam F. Amb.ogi T. b.rgauer M. Dragicevic J. Erö A. Escalante Del Valle M. Flechl R. Frühwirth M. Jeitler N. Krammer I. Krätschmer D. Liko T. Madlener I. Mikulec N. Rad J. Schieck R. Schöfb.ck M. Spanring W. Waltenb.rger C.-E. Wulz M. Zarucki V. Drugakov V. Mossolov 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 L. Moureaux A. Popov N. Postiau E. Starling L. Thomas C. Vander Velde P. Vanlaer D. Vannerom 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 C. Caputo P. David C. Delaere M. Delcourt A. Giammanco V. Lemaitre J. Prisciandaro A. Saggio P. Vischia J. Zob.c G. A. Alves G. Correia Silva C. Hensel A. Moraes 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 C. De Oliveira Martins 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 W. L. Prado Da Silva P. Reb.llo Teles L. J. Sanchez Rosas A. Santoro 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 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 X. Gao L. Yuan M. Ahmad Z. Hu Y. Wang G. M. Chen H. S. Chen M. Chen C. H. Jiang D. Leggat H. Liao Z. Liu A. Spiezia J. Tao E. Yazgan H. Zhang S. Zhang J. Zhao A. Agapitos Y. b.n G. Ch 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 National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Department of Physics Tsinghua University Beijing China University of Virginia Charlottesville Virginia USA Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China The University of Kansas Lawrence Kansas USA 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 National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Un

The polarizations of promptly produced χc1 and χc2 mesons are studied using data collected b. the CMS experiment at the LHC, in proton-proton collisions at s=8 TeV. The χc states are reconstructed via their radiative decays χc→J/ψγ, with the photons b.ing measured through conversions to e+e−, which allows the two states to b. well resolved. The polarizations are measured in the helicity frame, through the analysis of the χc2 to χc1 yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ→μ+μ− decay, in three b.ns of J/ψ transverse momentum. While no differences are seen b.tween the two states in terms of azimuthal decay angle distrib.tions, they are ob.erved to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum.

关键词： Charm quark Polarization Hadron colliders

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