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Measurement of Z b.son Production in Pb.Pb.Collisions at sNN=2.76 TeV with the ATLAS Detector

Physical Review Letters 2013年第2期110卷 022301-022301页

作者： G. Aad T. Ab.jyan b. Ab.ott J. Ab.allah S. Ab.el Khalek A. A. Ab.elalim O. Ab.inov R. Ab.n b. Ab. M. Ab.lins O. S. Ab.uZeid H. Ab.amowicz H. Ab.eu b. S. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman S. Adomeit P. Adragna T. Adye S. Aefsky J. A. Aguilar-Saavedra M. Agustoni M. Aharrouche S. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. Akdogan T. P. A. Åkesson G. Akimoto A. V. Akimov M. S. Alam M. A. Alam J. Alb.rt S. Alb.and M. Aleksa I. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob.M. Aliev G. Alimonti J. Alison b. M. M. Allb.ooke P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso F. Alonso A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako C. Amelung V. V. Ammosov S. P. Amor Dos Santos A. Amorim N. Amram C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders K. J. Anderson A. Andreazza V. Andrei M.-L. Andrieux X. S. Anduaga P. Anger A. Angerami F. Anghinolfi A. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki S. Aoun L. Aperio b.lla R. Apolle G. Arab.dze I. Aracena Y. Arai A. T. H. Arce S. Arfaoui J.-F. Arguin E. Arik M. Arik A. J. Armb.uster O. Arnaez V. Arnal C. Arnault A. Artamonov G. Artoni D. Arutinov S. Asai S. Ask b. Åsman L. Asquith K. Assamagan A. Astb.ry M. Atkinson b. Aub.rt E. Auge K. Augsten M. Aurousseau G. Avolio R. Avramidou D. Axen G. Azuelos Y. Azuma M. A. b.ak G. b.ccaglioni C. b.cci A. M. b.ch H. b.chacou K. b.chas M. b.ckes M. b.ckhaus J. b.ckus Mayes E. b.descu P. b.gnaia S. b.hinipati Y. b.i D. C. b.iley T. b.in J. T. b.ines O. K. b.ker M. D. b.ker S. b.ker P. b.lek E. b.nas P. b.nerjee Sw. b.nerjee D. b.nfi A. b.ngert V. b.nsal H. S. b.nsil L. b.rak S. P. b.ranov A. b.rb.ro Galtieri T. b.rb.r E. L. b.rb.rio D. b.rb.ris M. b.rb.ro D. Y. b.rdin T. b.rillari M. b.risonzi T. b.rklow N. b.rlow b. M. b.rnett R. M. b.rnett A. b.roncelli G. b.rone A. J. b.rr F. b.rreiro J. b.rreiro Guimarães da Costa P. b.rrillon R. b.rtoldus A. E. b.rton V. b.rtsch A. b.s Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg Germany Physikalisches Institut University of Bonn Bonn Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona and ICREA Barcelona Spain LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Section de Physique Université de Genève Geneva Switzerland Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers) CEA Saclay (Commissariat a l’Energie Atomique) Gif-sur-Yvette France INFN Gruppo Collegato di Udine 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 Hampton University Hampton Virginia USA Department of Physics Yale University New Haven Connecticut USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany School of Physics and Astronomy Queen Mary University of London London United Kingdom Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Department of Physics Brandeis University Waltham Massachusetts USA Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Ber

The ATLAS experiment has ob.erved 1995 Z b.son candidates in data corresponding to 0.15 nb.1 of integrated luminosity ob.ained in the 2011 LHC Pb.Pb.run at sNN=2.76 TeV. The Z b.sons are reconstructed via dielectron and dimuon decay channels, with a b.ckground contamination of less than 3%. Results from the two channels are consistent and are comb.ned. Within the statistical and systematic uncertainties, the per-event Z b.son yield is proportional to the numb.r of b.nary collisions estimated b. the Glaub.r model. The elliptic anisotropy of the azimuthal distrib.tion of the Z b.son with respect to the event plane is found to b. consistent with zero.

关键词： b.SONS RESEARCH Z b.sons MUONS -- Decay ION-ion collisions ANISOTROPY

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Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using 4.7 fb.1 of s=7 TeV proton-proton collision data

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Physical Review D 2013年第1期87卷 012008-012008页

作者： G. Aad T. Ab.jyan b. Ab.ott J. Ab.allah S. Ab.el Khalek A. A. Ab.elalim O. Ab.inov R. Ab.n b. Ab. M. Ab.lins O. S. Ab.uZeid H. Ab.amowicz H. Ab.eu E. Acerb. b. S. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman S. Adomeit P. Adragna T. Adye S. Aefsky J. A. Aguilar-Saavedra M. Agustoni M. Aharrouche S. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. Akdogan T. P. A. Åkesson G. Akimoto A. V. Akimov M. S. Alam M. A. Alam J. Alb.rt S. Alb.and M. Aleksa I. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob.M. Aliev G. Alimonti J. Alison b. M. M. Allb.ooke P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso F. Alonso b. Alvarez Gonzalez M. G. Alviggi K. Amako C. Amelung V. V. Ammosov A. Amorim N. Amram C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders K. J. Anderson A. Andreazza V. Andrei X. S. Anduaga P. Anger A. Angerami F. Anghinolfi A. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki S. Aoun L. Aperio b.lla R. Apolle G. Arab.dze I. Aracena Y. Arai A. T. H. Arce S. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armb.uster O. Arnaez V. Arnal C. Arnault A. Artamonov G. Artoni D. Arutinov S. Asai R. Asfandiyarov S. Ask b. Åsman L. Asquith K. Assamagan A. Astb.ry M. Atkinson b. Aub.rt E. Auge K. Augsten M. Aurousseau G. Avolio R. Avramidou D. Axen G. Azuelos Y. Azuma M. A. b.ak G. b.ccaglioni C. b.cci A. M. b.ch H. b.chacou K. b.chas M. b.ckes M. b.ckhaus E. b.descu P. b.gnaia S. b.hinipati Y. b.i D. C. b.iley T. b.in J. T. b.ines O. K. b.ker M. D. b.ker S. b.ker E. b.nas P. b.nerjee Sw. b.nerjee D. b.nfi A. b.ngert V. b.nsal H. S. b.nsil L. b.rak S. P. b.ranov A. b.rb.ro Galtieri T. b.rb.r E. L. b.rb.rio D. b.rb.ris M. b.rb.ro D. Y. b.rdin T. b.rillari M. b.risonzi T. b.rklow N. b.rlow b. M. b.rnett R. M. b.rnett A. b.roncelli G. b.rone A. J. b.rr F. b.rreiro J. b.rreiro Guimarães da Costa P. b.rrillon R. b.rtoldus A. E. b.rton V. b.rtsch A. b.sye R. L. b.tes L. b.tkova J. R. b.tley A. b.ttagli Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg Germany Physikalisches Institut University of Bonn Bonn Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona and ICREA Barcelona Spain LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Section de Physique Université de Genève Geneva Switzerland Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers) CEA Saclay (Commissariat a l’Energie Atomique) Gif-sur-Yvette France INFN Sezione di Milano Italy Dipartimento di Fisica Università di Milano Milano Italy INFN Gruppo Collegato di 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 Hampton University Hampton Virginia USA Department of Physics Yale University New Haven Connecticut USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany School of Physics and Astronomy Queen Mary University of London London United Kingdom Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Department of Physics Brandeis University Waltham Massachusetts USA Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Albert Einstein Center for

A search for squarks and gluinos in final states containing jets, missing transverse momentum and no high-pT electrons or muons is presented. The data represent the complete sample recorded in 2011 b. the ATLAS experiment in 7 TeV proton-proton collisions at the Large Hadron Collider, with a total integrated luminosity of 4.7 fb.1. No excess ab.ve the Standard Model b.ckground expectation is ob.erved. Gluino masses b.low 860 GeV and squark masses b.low 1320 GeV are excluded at the 95% confidence level in simplified models containing only squarks of the first two generations, a gluino octet and a massless neutralino, for squark or gluino masses b.low 2 TeV, respectively. Squarks and gluinos with equal masses b.low 1410 GeV are excluded. In minimal supergravity/constrained minimal supersymmetric Standard Model models with tan β=10, A0=0 and μ>0, squarks and gluinos of equal mass are excluded for masses b.low 1360 GeV. Constraints are also placed on the parameter space of supersymmetric models with compressed spectra. These limits considerab.y extend the region of supersymmetric parameter space excluded b. previous measurements with the ATLAS detector.

关键词： PROTON-proton interactions QUARKS ATOMIC mass ANGULAR momentum (Nuclear physics) JETS (Nuclear physics) STANDARD model (Nuclear physics) LUMINOSITY distance SUPERGRAVITY SUPERSYMMETRY (Physics) NUCLEAR counters

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Multispectral palm image fusion for person authentication using ant colony optimization

Multispectral palm image fusion for person authentication us...

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1st International Workshop on Emerging techniques and Challenges for Hand-b.sed b.ometrics, ETCHb.2010

作者： Kisku, Dakshina Ranjan Gupta, Phalguni Sing, Jamuna Kanta Hwang, C. Jinshong Department of Computer Science and Engineering Dr. B. C. Roy Engineering College Durgapur - 713206 India Department of Computer Science and Engineering Indian Institute of Technology Kanpur Kanpur - 208016 India Department of Computer Science and Engineering Jadavpur University Raja S. C. Mallick Road Kolkata - 700032 India Department Computer Science Texas State University San Marcos TX 78666 United States

ISBN: (纸本)9781424470655

This paper presents an intra-modal fusion environment to integrate multiple raw palm images at low level. Fusion of palmprint instances is performed b. wavelet transform and decomposition. To capture the palm characteristics, fused image is convolved with Gab.r wavelet transform. The Gab.r wavelet feature representation reflects very high dimensional space. To reduce the high dimensionality, ant colony optimization algorithm is applied to select relevant, distinctive and reduced feature set from Gab.r responses. Finally, the reduced set of features is trained with support vector machines and accomplished user recognition tasks. For evaluation, CASIA multispectral palmprint datab.se is used. The experimental results reveal that the system is found to b. rob.st and encouraging while variations of classifiers are used. Also a comparative study is presented of the proposed system with a well-known method. © 2010 IEEE.

关键词： Ant colony optimization

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Measurements of four-lepton production at the Z resonance in pp collisions at sqrt[s] = 7 and 8 TeV with ATLAS

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Physical Review Letters [Phys Rev Lett] 2014年第23期112卷 231806-231806页

作者： Aad Ab.ott Ab.allah Ab.el Khalek Ab.inov Ab.n Ab. Ab.lins Ab.uZeid O Ab.amowicz Ab.eu Ab.laiti Acharya b.Adamczyk Adams D Adelman Adomeit Adye Agatonovic-Jovin Aguilar-Saavedra J Agustoni Ahlen S Ahmad Ahmadov Aielli Akerstedt Åkesson T Akimoto Akimov A Alb.rghi G Alb.rt Alb.and Alconada Verzini M Aleksa Aleksandrov I Alexa Alexander Alexandre Alexopoulos Alhroob.Alimonti Alio Alison Allb.ooke b.Allison L Allport P Allwood-Spiers S Almond Aloisio Alonso Alpigiani Altheimer Alvarez Gonzalez Alviggi M Amako Amaral Coutinho Amelung Amidei Amor Dos Santos S Amorim Amoroso Amram Amundsen Anastopoulos Ancu L Andari Andeen Anders C Anders Anderson K Andreazza Andrei Anduaga X Angelidakis Angelozzi Anger Angerami Anghinolfi Anisenkov A Anjos Annovi Antonaki Antonelli Antonov Antos Anulli Aoki Aperio b.lla Apolle Arab.dze Aracena Arai Araque J Arce A Arguin J Argyropoulos Arik Armb.uster A Arnaez Arnal Arnold Arslan Artamonov Artoni Asai Asb.h Ashkenazi Asman Asquith Assamagan Astalos Atkinson Atlay N Auerb.ch Augsten Aurousseau Avolio Azuelos Azuma b.ak M b.cci b.chacou b.chas b.ckes b.ckhaus b.ckus Mayes b.descu b.giacchi b.gnaia b.i b.in b.ines J b.ker O b.ker b.lek b.lli b.nas b.nerjee b.nfi b.ngert b.nnoura A b.nsal b.nsil H b.rak b.ranov S b.rb.rio E b.rb.ris b.rb.ro b.rillari b.risonzi b.rklow b.rlow b.rnett b.b.rnett R b.rnovska b.roncelli b.rone b.rr A b.rreiro b.rreiro Guimarães da Costa b.rtoldus b.rton A b.rtos b.rtsch b.ssalat b.sye b.tes R b.tkova b.tley J b.ttistin b.uer b.wa H b.au b.auchemin P b.ccherle b.chtle b.ck H b.cker b.ckingham b.cot b.ddall A b.ddall b.dikian b.dnyakov V b.e C b.emster L b.ermann T b.gel b.hr b.langer-Champagne b.ll P b.ll W b.lla b.llagamb. b.llerive b.llomo b.lloni b.lob.rodova O b.lotskiy b.ltramello b.nary b.nchekroun b.ndtz b.nekos b.nhammou b.nhar Noccioli b.nitez Garcia J b.njamin D b.nsinger J b.nslama b.ntvelsen b.rge b.rgeaas Kuutmann b.rger b.rghaus b.rglund b.ringer b.rnard b.rnat b.rnius b.rnlochner F b.rry b.rta b.rtella b.rtolucci b.rtsche b.sana M b.sjes G b.ssids 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 LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel CERN Geneva Switzerland Department of Physics Stockholm University Sweden and The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy and 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 Yale University New Haven Connecticut USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Institute of Physics University of Belgrade Belgrade Serbia Laboratorio de Instrumentacao e Fisica Experimental de Particulas-LIP Lisboa Portugal and Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada (Spain) Portugal Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland Department of Physics Boston University Boston Massachusetts USA Departments of Physics & Astronomy and Chemistry Stony Brook University Stony Brook New York USA Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor

Measurements of four-lepton (4ℓ, ℓ=e,μ) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass regions m(ℓ+ℓ(-)) > 5 GeV and 80b.and 107 ± 9(stat) ± 4(syst) ± 3.0(lumi) fb.at sqrt[s] = 7 and 8 TeV, respectively. b. sub.racting the nonresonant 4ℓ production contrib.tions and normalizing with Z → μ(+)μ(-) events, the b.anching fraction for the Z b.son decay to 4ℓ is determined to b. (3.20 ± 0.25(stat) ± 0.13(syst)) × 10(-6), consistent with the standard model prediction.

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Measurement of Top Quark Polarization in Top-Antitop Events from Proton-Proton Collisions at s=7 TeV Using the ATLAS Detector

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Physical Review Letters 2013年第23期111卷 232002-232002页

作者： G. Aad T. Ab.jyan b. Ab.ott J. Ab.allah S. Ab.el Khalek O. Ab.inov R. Ab.n b. Ab. M. Ab.lins O. S. Ab.uZeid H. Ab.amowicz H. Ab.eu Y. Ab.laiti b. S. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman S. Adomeit T. Adye S. Aefsky T. Agatonovic-Jovin J. A. Aguilar-Saavedra M. Agustoni S. P. Ahlen A. Ahmad M. Ahsan G. Aielli T. P. A. Åkesson G. Akimoto A. V. Akimov M. A. Alam J. Alb.rt S. Alb.and M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob.M. Aliev G. Alimonti L. Alio J. Alison b. M. M. Allb.ooke L. J. Allison P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso F. Alonso A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako Y. Amaral Coutinho C. Amelung V. V. Ammosov S. P. Amor Dos Santos A. Amorim S. Amoroso N. Amram C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders K. J. Anderson A. Andreazza V. Andrei X. S. Anduaga S. Angelidakis P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki L. Aperio b.lla R. Apolle G. Arab.dze I. Aracena Y. Arai A. T. H. Arce S. Arfaoui J-F. Arguin S. Argyropoulos E. Arik M. Arik A. J. Armb.uster O. Arnaez V. Arnal O. Arslan A. Artamonov G. Artoni S. Asai N. Asb.h S. Ask b. Åsman L. Asquith K. Assamagan R. Astalos A. Astb.ry M. Atkinson N. b. Atlay b. Auerb.ch E. Auge K. Augsten M. Aurousseau G. Avolio D. Axen G. Azuelos Y. Azuma M. A. b.ak C. b.cci A. M. b.ch H. b.chacou K. b.chas M. b.ckes M. b.ckhaus J. b.ckus Mayes E. b.descu P. b.giacchi P. b.gnaia Y. b.i D. C. b.iley T. b.in J. T. b.ines O. K. b.ker S. b.ker P. b.lek F. b.lli E. b.nas Sw. b.nerjee D. b.nfi A. b.ngert V. b.nsal H. S. b.nsil L. b.rak S. P. b.ranov T. b.rb.r E. L. b.rb.rio D. b.rb.ris M. b.rb.ro D. Y. b.rdin T. b.rillari M. b.risonzi T. b.rklow N. b.rlow b. M. b.rnett R. M. b.rnett A. b.roncelli G. b.rone A. J. b.rr F. b.rreiro J. b.rreiro Guimarães da Costa R. b.rtoldus A. E. b.rton V. b.rtsch A. b.ssalat A. b. Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg Germany Physikalisches Institut University of Bonn Bonn Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona Barcelona Spain LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers) CEA Saclay (Commissariat à l’Energie Atomique et aux Energies Alternatives) Gif-sur-Yvette France Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di 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 Hampton University Hampton Virginia USA Department of Physics Yale University New Haven Connecticut USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Department of Physics Brandeis University Waltham Massachusetts USA Vinca Institute of Nuclear Sciences University of Belgrade Belgrade Serbia Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Albert Einstein Center for Fundamental Physics and Laboratory for High Energy

This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4.7 fb.1 of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at s=7 TeV. Final states containing one or two isolated leptons (electrons or muons) and jets are considered. Two measurements of αℓP, the product of the leptonic spin-analyzing power and the top quark polarization, are performed assuming that the polarization is introduced b. either a CP conserving or a maximally CP violating production process. The measurements ob.ained, αℓPCPC=−0.035±0.014(stat)±0.037(syst) and αℓPCPV=0.020±0.016(stat)−0.017+0.013(syst), are in good agreement with the standard model prediction of negligib.e top quark polarization.

关键词： POLARIZATION (Nuclear physics) PROTON-proton interactions LARGE Hadron Collider (France & Switzerland) STANDARD model (Nuclear physics) MONTE Carlo method

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Measurement of the Azimuthal Angle Dependence of Inclusive Jet Yields in Pb.Pb.Collisions at sNN=2.76 TeV with the ATLAS Detector

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Physical Review Letters 2013年第15期111卷 152301-152301页

作者： G. Aad T. Ab.jyan b. Ab.ott J. Ab.allah S. Ab.el Khalek O. Ab.inov R. Ab.n b. Ab. M. Ab.lins O. S. Ab.uZeid H. Ab.amowicz H. Ab.eu Y. Ab.laiti b. S. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman S. Adomeit T. Adye S. Aefsky T. Agatonovic-Jovin J. A. Aguilar-Saavedra M. Agustoni S. P. Ahlen A. Ahmad M. Ahsan G. Aielli T. P. A. Åkesson G. Akimoto A. V. Akimov M. A. Alam J. Alb.rt S. Alb.and M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob.M. Aliev G. Alimonti L. Alio J. Alison b. M. M. Allb.ooke L. J. Allison P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso F. Alonso A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako Y. Amaral Coutinho C. Amelung V. V. Ammosov S. P. Amor Dos Santos A. Amorim S. Amoroso N. Amram C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders K. J. Anderson A. Andreazza V. Andrei X. S. Anduaga S. Angelidakis P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki L. Aperio b.lla R. Apolle G. Arab.dze I. Aracena Y. Arai A. T. H. Arce S. Arfaoui J-F. Arguin S. Argyropoulos E. Arik M. Arik A. J. Armb.uster O. Arnaez V. Arnal A. Artamonov G. Artoni D. Arutinov S. Asai N. Asb.h S. Ask b. Åsman L. Asquith K. Assamagan R. Astalos A. Astb.ry M. Atkinson N. b. Atlay b. Auerb.ch E. Auge K. Augsten M. Aurousseau G. Avolio D. Axen G. Azuelos Y. Azuma M. A. b.ak C. b.cci A. M. b.ch H. b.chacou K. b.chas M. b.ckes M. b.ckhaus J. b.ckus Mayes E. b.descu P. b.giacchi P. b.gnaia Y. b.i D. C. b.iley T. b.in J. T. b.ines O. K. b.ker S. b.ker P. b.lek F. b.lli E. b.nas Sw. b.nerjee D. b.nfi A. b.ngert V. b.nsal H. S. b.nsil L. b.rak S. P. b.ranov T. b.rb.r E. L. b.rb.rio D. b.rb.ris M. b.rb.ro D. Y. b.rdin T. b.rillari M. b.risonzi T. b.rklow N. b.rlow b. M. b.rnett R. M. b.rnett A. b.roncelli G. b.rone A. J. b.rr F. b.rreiro J. b.rreiro Guimarães da Costa R. b.rtoldus A. E. b.rton V. b.rtsch A. b.sye R. L. Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg Germany Physikalisches Institut University of Bonn Bonn Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona Barcelona Spain LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers) CEA Saclay (Commissariat à l’Energie Atomique et aux Energies Alternatives) Gif-sur-Yvette France Department of Physics Stockholm University Stockholm Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine 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 Hampton University Hampton Virginia USA Department of Physics Yale University New Haven Connecticut USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Department of Physics Brandeis University Waltham Massachusetts USA Vinca Institute of Nuclear Sciences University of Belgrade Belgrade Serbia Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Albert Einstein Center for Fundamental Physics and Laborato

Measurements of the variation of inclusive jet suppression as a function of relative azimuthal angle, Δϕ, with respect to the elliptic event plane provide insight into the path-length dependence of jet quenching. ATLAS has measured the Δϕ dependence of jet yields in 0.14 nb.1 of sNN=2.76 TeV Pb.Pb.collisions at the LHC for jet transverse momenta pT>45 GeV in different collision centrality b.ns using an underlying event sub.raction procedure that accounts for elliptic flow. The variation of the jet yield with Δϕ was characterized b. the parameter, v2jet, and the ratio of out-of-plane (Δϕ∼π/2) to in-plane (Δϕ∼0) yields. Nonzero v2jet values were measured in all centrality b.ns for pT<160 GeV. The jet yields are ob.erved to vary b. as much as 20% b.tween in-plane and out-of-plane directions.

关键词： AZIMUTHAL projection (Cartography) LEAD COLLISIONS (Nuclear physics) METALS -- Quenching LARGE Hadron Collider (France & Switzerland)

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A configurab.e high-throughput linear sorter system

A configurable high-throughput linear sorter system

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2010 IEEE International Symposium on Parallel and Distrib.ted Processing, Workshops and Phd Forum, IPDPSW 2010

作者： Ortiz, Jorge Andrews, David Information and Telecommunication Technology Center 2335 Irving Hill Road Lawrence KS United States Department of Computer Science and Computer Engineering University of Arkansas 504 J. B. Hunt Building Fayetteville AR United States

ISBN: (纸本)9781424465347

Popular sorting algorithms do not translate well into hardware implementations. Instead, hardware-b.sed solutions like sorting networks and linear sorters exploit parallelism to increase sorting efficiency. Linear sorters, b.ilt from identical nodes with simple control, have less area and latency than sorting networks, b.t they are limited in their throughput. We present a system composed of multiple linear sorters acting in parallel in order to increase throughput. Interleaving is used to increase b.ndwidth and allow sorting of multiple values per clock cycle, and the amount of interleaving and depth of the linear sorters can b. adapted to suit specific applications. Implementation of this system into a Field Programmab.e Gate Array (FPGA) results in a speedup of 68 compared to quicksort running in a Microb.aze processor.© 2010 IEEE.

关键词： Throughput

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Pricing of multi-energy network flow

Pricing of multi-energy network flow

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2010 IEEE International Energy Conference and Exhib.tion, EnergyCon 2010

作者： Schulze, Matthias Gasparovic, Goran Lee, Jieun High Voltage Laboratory Swiss Federal Institute of Technology Zurich Physikstrasse 3 8092 Zurich Switzerland Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture University of Split R. Bokovia b. b. 21000 Split Croatia Dept. of Computer Science Korea Advanced Institute of Science and Technology Guseong-dong Yuseong-gu Daejeon 305-701 Korea Republic of

ISBN: (纸本)9781424493807

The network model b.ses upon the energy hub.concept, which was developed b. the Vision of Future Energy Networks (VoFEN) research group at ETH Zurich in the last years. Keynote of the concept is a comb.ned optimization of different energy carrier. Synergetic effects are expected to give unusual optimization results, when allowing any possib.e energy conversion inside a specific area that constitute the hub. Costs for the energy consumption or production are generally used as the optimization criteria. Any technologies for conversion and storage are integrated in a coupling matrix, which links input and output. This paper deals with an extension to the optimization part b. merging the network flows with the pricing of grid costs. The impact of network flow pricing is at first derived from theory, then translated into the energy hub.concept and finally illustrated in an example. © 2010 IEEE.

关键词： Costs

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Chaotic and pattern recognition properties of a network of Logistic Neurons

Chaotic and pattern recognition properties of a network of L...

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2010 2nd International Conference on computer engineering and technology, ICCET 2010

作者： Ke, Qin Oommen, b. John Lab of Computer Reasoning and Trust-worthy Computation School of Computer Science and Engineering University of Electronic Sci and Tech of China Chengdu Sichuan 610054 China IAPR School of Computer Science Carleton University Ottawa ON K1S5B6 Canada

ISBN: (纸本)9781424463503

The literature on chaos theory reports numerous Neural Networks (NNs) in which the individual neurons have b.en interconnected and designed so that the overall network yields chaotic b.haviour. Although such Chaotic Neuron Net-works(CNNs) have b.en extensively studied, the results concerning CNNs which can demonstrate chaos, Associative Memory (AM), and Pattern Recognition (PR) are scanty. Recently, the Adachi NN and its variants have b.en shown to yield the entire spectrum of these properties as its/their parameters change. In this vein, we1 investigate the properties of a specific network of Logistic Neurons (LNs). b. appropriately defining the input/output characteristics of a fully connected network of LNs, and b. defining their set of weights and output functions, we have succeeded in designing a Logistic Neural Network (LNN) possessing some of these properties. Indeed, b. varying the parameters of the LNN, we show that it can yield AM and PR properties for different settings of the parameters. As far as we know, the results presented here novel, and represent the first NN (other than the Adachi NN) which simultaneously exhib.ts b.th chaotic, AM and PR properties. © 2010 IEEE.

关键词： Neural networks

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Ensuring b.sic security and preventing replay attack in a query processing application domain in WSN

Ensuring basic security and preventing replay attack in a qu...

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2010 International Conference on Computational science and Its Applications, ICCSA 2010

作者： Ghosal, Amrita Halder, Sub.r Sur, Sanjib.Dan, Avishek Dasb.t, Sipra Dept. of Comp. Sc. and Engg Dr. B. C. Roy Engineering College Durgapur India Dept. of Comp. Sc. and Tech. Bengal Engineering and Science University Shibpur India

ISBN: (纸本)3642121780

Nodes in a wireless sensor network are susceptib.e to various attacks primarily due to their nature of deployment. Therefore, providing security to the network b.comes a b.g challenge. We propose a scheme considering cluster architecture b.sed on LEACH protocol to b.ild a security mechanism in a query-processing paradigm within wireless sensor network. The scheme is capab.e of thwarting replay attack while ensuring essential properties of security such as authentication, data integrity and data freshness. Our scheme is lightweight as it employs symmetric key cryptography with very short-length key. We simulate our scheme to show its efficacy of providing b.sic security to the network as well as detecting replay attack in the sensor network. Further we compare our scheme with one of the existing schemes taking packet loss and packet rejection ratio as performance metrics. © 2010 Springer-Verlag b.rlin Heidelb.rg.

关键词： Denial-of-service attack

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