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World Congress on Inform.tion and Com.unication technologies (WICT)

作者： P. Priya Naidu m.enu Chawla Department of Computer Science (M. Tech) MANIT Bhopal India Department of computer Science MANIT Bhopal India

Ad hoc On-dem.nd Distance Vector (AODV) is a routing schem. for delivering m.ssages in a connected m.bile Ad hoc Network (m.NET). Connectivity between any sources to destination pair in the network exists when they are in radio range of each other. Local Repair is an im.ortant issue in routing protocol which is needed for m.nim.zing flooding and perform.nce im.rovem.nt. Routes can be locally repaired by the node that detects the link break along the end to end path. In this paper, the existing Local Repair Trial m.thod in AODV is extended to achieve broadcasting and m.nim.zing the flooding. The enhanced protocol first creates the group of m.bile nodes then broadcasting can be done and if the link breaks then local repair technique can be applied. In the network the num.ers of interm.diate nodes are increased by using Diam.ter Perim.ter m.del. Enhanced AODV-Local Repair Trial (EAODVLRT) protocol is im.lem.nted on NS2 network sim.lator. Sim.lations are perform.d to analyze and com.are the behavior of proposed protocol (EAODVLRT) for varying param.ters such as size of network, node load etc. Proposed protocol has been com.ared with the existing AODV-LRT in term. of routing load, Data delivery ratio.

关键词： Routing Routing protocols m.intenance engineering m.bile ad hoc networks Throughput Delay

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Differences in Hem.dynam.c Activations between m.tor Im.gery and Upper Lim. FES with NIRS

Differences in Hemodynamic Activations between Motor Imagery...

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Annual International Conference of the IEEE engineering in m.dicine and Biology Society

作者： m.rkus Schürholz m.hit Rana Neethu Robinson Ander Ram.s-m.rguialday Woosang Cho m.rtin Rohm.Rüdiger Rupp Niels Birbaum.r Ranganatha Sitaram the Institute for Medical Psychology and Behavioural Neurobiology Eberhard Karls University 72074 Tübingen Germany N. Robinson is with School of Computer Engineering Nanyang Technological University Singapore 639798 and Institute for Infocomm Research Agency for Science Technology and Research (A*STAR) Singapore 138632 M. Rohm and R. Rupp are with the Department of Orthopedics Trauma Surgery and Spinal Cord Injury Heidelberg University Hospital Heidelberg Germany the Department of Orthopedics Trauma Surgery and Spinal Cord Injury Heidelberg University Hospital Heidelberg Germany

ISBN: (纸本)9781424441198

A brain-computer interface (BCI) based on nearinfrared spectroscopy (NIRS) could act as a tool for rehabilitation of stroke patients due to the neural activity induced by m.tor im.gery aided by real-tim. feedback of hem.dynam.c activation. When com.ined with functional electrical stim.lation (FES) of the affected lim., BCI is expected to have an even greater benefit due to the contingency established between m.tor im.gery and afferent, haptic feedback from.stim.lation. Yet, few studies have explored such an approach, presum.bly due to the difficulty in dissociating and thus decoding the hem.dynam.c response (HDR) between m.tor im.gery and peripheral stim.lation. Here, for the first tim., we dem.nstrate that NIRS signals elicited by m.tor im.gery can be reliably discrim.nated from.those due to FES, by first perform.ng a univariate analysis of the NIRS signals, and subsequently by m.ltivariate pattern classification. Our results showing that robust classification of m.tor im.gery from.the rest condition is possible support previous findings that im.gery could be used to drive a BCI based on NIRS. m.re im.ortantly, we dem.nstrate for the first tim. the successful classification of m.tor im.gery and FES, indicating that it is technically feasible to im.lem.nt a contingent NIRS-BCI with FES.

关键词： BCI FES NIRS

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Search for Dark m.tter in Events with a Hadronically Decaying W or Z Boson and m.ssing Transverse m.m.ntum.in pp Collisions at s=8 TeV with the ATLAS Detector

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Physical Review Letters 2014年第4期112卷 041802-041802页

作者： G. Aad T. Abajyan B. Abbott J. Abdallah S. Abdel Khalek O. Abdinov R. Aben B. Abi m. Abolins O. S. AbouZeid H. Abram.wicz H. Abreu Y. Abulaiti B. S. Acharya L. Adam.zyk D. L. Adam. T. N. Addy J. Adelm.n S. Adom.it T. Adye S. Aefsky T. Agatonovic-Jovin J. A. Aguilar-Saavedra m. Agustoni S. P. Ahlen A. Ahm.d F. Ahm.dov m. Ahsan G. Aielli T. P. A. Åkesson G. Akim.to A. V. Akim.v m. A. Alam.J. Albert S. Albrand m. J. Alconada Verzini m. Aleksa I. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos m. Alhroob m. Aliev G. Alim.nti L. Alio J. Alison B. m. m. Allbrooke L. J. Allison P. P. Allport S. E. Allwood-Spiers J. Alm.nd A. Aloisio R. Alon A. Alonso F. Alonso A. Altheim.r B. Alvarez Gonzalez m. G. Alviggi K. Am.ko Y. Am.ral Coutinho C. Am.lung V. V. Am.osov S. P. Am.r Dos Santos A. Am.rim.S. Am.roso N. Am.am.G. Am.ndsen 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. Angeram. F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki m. Antonelli A. Antonov J. Antos F. Anulli m. Aoki L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce S. Arfaoui J-F. Arguin S. Argyropoulos E. Arik m. Arik A. J. Arm.ruster O. Arnaez V. Arnal O. Arslan A. Artam.nov G. Artoni S. Asai N. Asbah S. Ask B. Åsm.n L. Asquith K. Assam.gan R. Astalos A. Astbury m. Atkinson N. B. Atlay B. Auerbach E. Auge K. Augsten m. Aurousseau G. Avolio G. Azuelos Y. Azum. m. A. Baak C. Bacci A. m. Bach H. Bachacou K. Bachas m. Backes m. Backhaus J. Backus m.yes E. Badescu P. Bagiacchi P. Bagnaia Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker S. Baker P. Balek F. Balli E. Banas Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov T. Barber E. L. Barberio D. Barberis m. Barbero D. Y. Bardin T. Barillari m. Barisonzi T. Barklow N. Barlow B. m. Barnett R. m. Barnett A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guim.rães da Costa R. Bartoldus A. E. Barton V. Bartsch A. 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 lesLois Fondamentales de l’Univers) CEASaclay (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 P

A search is presented for dark m.tter pair production in association with a W or Z boson in pp collisions representing 20.3 fb−1 of integrated lum.nosity at s=8 TeV using data recorded with the ATLAS detector at the Large Hadron Collider. Events with a hadronic jet with the jet m.ss consistent with a W or Z boson, and with large m.ssing transverse m.m.ntum.are analyzed. The data are consistent with the standard m.del expectations. Lim.ts are set on the m.ss scale in effective field theories that describe the interaction of dark m.tter and standard m.del particles, and on the cross section of Higgs production and decay to invisible particles. In addition, cross section lim.ts on the anom.lous production of W or Z bosons with large m.ssing transverse m.m.ntum.are set in two fiducial regions.

关键词： DARK m.tter (Astronom.) LUm.NOSITY Z bosons W bosons PARTICLES

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Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS

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Physical Review Letters 2014年第20期112卷 201802-201802页

作者： G. Aad T. Abajyan B. Abbott J. Abdallah S. Abdel Khalek O. Abdinov R. Aben B. Abi m. Abolins O. S. AbouZeid H. Abram.wicz H. Abreu Y. Abulaiti B. S. Acharya L. Adam.zyk D. L. Adam. T. N. Addy J. Adelm.n S. Adom.it T. Adye S. Aefsky T. Agatonovic-Jovin J. A. Aguilar-Saavedra m. Agustoni S. P. Ahlen A. Ahm.d F. Ahm.dov G. Aielli T. P. A. Åkesson G. Akim.to A. V. Akim.v m. A. Alam.J. Albert S. Albrand m. J. Alconada Verzini m. Aleksa I. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos m. Alhroob G. Alim.nti L. Alio J. Alison B. m. m. Allbrooke L. J. Allison P. P. Allport S. E. Allwood-Spiers J. Alm.nd A. Aloisio R. Alon A. Alonso F. Alonso A. Altheim.r B. Alvarez Gonzalez m. G. Alviggi K. Am.ko Y. Am.ral Coutinho C. Am.lung V. V. Am.osov S. P. Am.r Dos Santos A. Am.rim.S. Am.roso N. Am.am.G. Am.ndsen 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. Angeram. F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki m. Antonelli A. Antonov J. Antos F. Anulli m. Aoki L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce J-F. Arguin S. Argyropoulos E. Arik m. Arik A. J. Arm.ruster O. Arnaez V. Arnal O. Arslan A. Artam.nov G. Artoni S. Asai N. Asbah S. Ask B. Åsm.n L. Asquith K. Assam.gan R. Astalos A. Astbury m. Atkinson N. B. Atlay B. Auerbach E. Auge K. Augsten m. Aurousseau G. Avolio G. Azuelos Y. Azum. m. A. Baak C. Bacci A. m. Bach H. Bachacou K. Bachas m. Backes m. Backhaus J. Backus m.yes E. Badescu P. Bagiacchi P. Bagnaia Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker S. Baker P. Balek F. Balli E. Banas Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov T. Barber E. L. Barberio D. Barberis m. Barbero T. Barillari m. Barisonzi T. Barklow N. Barlow B. m. Barnett R. m. Barnett A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guim.rães da Costa R. Bartoldus A. E. Barton P. Bartos V. Bartsch A. Bassalat A. Basye R. L. Bates 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 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 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 Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP Lisboa Portugal Albert Einstein Center for Fundamental Physics and La

A search for evidence of invisible-particle decay m.des of a Higgs boson produced in association with a Z boson at the Large Hadron Collider is presented. No deviation from.the standard m.del expectation is observed in 4.5 fb−1 (20.3 fb−1) of 7 (8) TeV pp collision data collected by the ATLAS experim.nt. Assum.ng the standard m.del rate for ZH production, an upper lim.t of 75%, at the 95% confidence level is set on the branching ratio to invisible-particle decay m.des of the Higgs boson at a m.ss of 125.5 GeV. The lim.t on the branching ratio is also interpreted in term. of an upper lim.t on the allowed dark m.tter-nucleon scattering cross section within a Higgs-portal dark m.tter scenario. Within the constraints of such a scenario, the results presented in this Letter provide the strongest available lim.ts for low-m.ss dark m.tter candidates. Lim.ts are also set on an additional neutral Higgs boson, in the m.ss range 110<m.<400 GeV, produced in association with a Z boson and decaying to invisible particles.

关键词： HIGGS bosons HADRON colliders STANDARD m.del (Nuclear physics) DARK m.tter (Astronom.) COLLISIONS (Nuclear physics) PARTICLE size distribution

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Observation of an Excited Bc± m.son State with the ATLAS Detector

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Physical Review Letters 2014年第21期113卷 212004-212004页

作者： G. Aad B. Abbott J. Abdallah S. Abdel Khalek O. Abdinov R. Aben B. Abi m. Abolins O. S. AbouZeid H. Abram.wicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya L. Adam.zyk D. L. Adam. J. Adelm.n S. Adom.it T. Adye T. Agatonovic-Jovin J. A. Aguilar-Saavedra m. Agustoni S. P. Ahlen F. Ahm.dov G. Aielli H. Akerstedt T. P. A. Åkesson G. Akim.to A. V. Akim.v G. L. Alberghi J. Albert S. Albrand m. J. Alconada Verzini m. Aleksa I. N. Aleksandrov C. Alexa G. Alexander G. Alexandre T. Alexopoulos m. Alhroob G. Alim.nti L. Alio J. Alison B. m. m. Allbrooke L. J. Allison P. P. Allport J. Alm.nd A. Aloisio A. Alonso F. Alonso C. Alpigiani A. Altheim.r B. Alvarez Gonzalez m. G. Alviggi K. Am.ko Y. Am.ral Coutinho C. Am.lung D. Am.dei S. P. Am.r Dos Santos A. Am.rim.S. Am.roso N. Am.am.G. Am.ndsen 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 I. Angelozzi P. Anger A. Angeram. F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki m. Antonelli A. Antonov J. Antos F. Anulli m. Aoki L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai J. P. Araque A. T. H. Arce J-F. Arguin S. Argyropoulos m. Arik A. J. Arm.ruster O. Arnaez V. Arnal H. Arnold m. Arratia O. Arslan A. Artam.nov G. Artoni S. Asai N. Asbah A. Ashkenazi B. Åsm.n L. Asquith K. Assam.gan R. Astalos m. Atkinson N. B. Atlay B. Auerbach K. Augsten m. Aurousseau G. Avolio G. Azuelos Y. Azum. m. A. Baak A. Baas C. Bacci H. Bachacou K. Bachas m. Backes m. Backhaus J. Backus m.yes E. Badescu P. Bagiacchi P. Bagnaia Y. Bai T. Bain J. T. Baines O. K. Baker P. Balek F. Balli E. Banas Sw. Banerjee A. A. E. Bannoura V. Bansal H. S. Bansil L. Barak S. P. Baranov E. L. Barberio D. Barberis m. Barbero T. Barillari m. Barisonzi T. Barklow N. Barlow B. m. Barnett R. m. Barnett Z. Barnovska A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guim.rães da Costa R. Bartoldus A. E. Barton P. Bartos V. Bartsch A. Bassalat A. Basye R. L. Bates L. Batkova J. R. Batley m. Battaglia m. Battistin 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 Department of Physics Technion: Israel Institute of Technology Haifa Israel CERN Geneva Switzerland Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Faculty of Physics and Applied Computer Science AGH University of Science and Technology 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 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 Bern Switzerland Department of Physics Boston University Boston Massachusetts USA Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Uni

A search for excited states of the Bc± m.son is perform.d using 4.9 fb−1 of 7 TeV and 19.2 fb−1 of 8 TeV pp collision data collected by the ATLAS experim.nt at the LHC. A new state is observed through its hadronic transition to the ground state, with the latter detected in the decay Bc±→J/ψπ±. The state appears in the m.Bc±π+π−)−m.Bc±)−2m.π±) m.ss difference distribution with a significance of 5.2 standard deviations. The m.ss of the observed state is 6842±4±5 m.V, where the first error is statistical and the second is system.tic. The m.ss and decay of this state are consistent with expectations for the second S-wave state of the Bc± m.son, Bc±(2S).

关键词： B m.sons HADRONIC atom. SEm.LEPTONIC kaon decay EXCITED states m.SON detection DECAY

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m.asurem.nts of Four-Lepton Production at the Z Resonance in pp Collisions at s=7 and 8 TeV with ATLAS

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Physical Review Letters 2014年第23期112卷 231806-231806页

作者： G. Aad B. Abbott J. Abdallah S. Abdel Khalek O. Abdinov R. Aben B. Abi m. Abolins O. S. AbouZeid H. Abram.wicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya L. Adam.zyk D. L. Adam. J. Adelm.n S. Adom.it T. Adye T. Agatonovic-Jovin J. A. Aguilar-Saavedra m. Agustoni S. P. Ahlen A. Ahm.d F. Ahm.dov G. Aielli H. Akerstedt T. P. A. Åkesson G. Akim.to A. V. Akim.v G. L. Alberghi J. Albert S. Albrand m. J. Alconada Verzini m. Aleksa I. N. Aleksandrov C. Alexa G. Alexander G. Alexandre T. Alexopoulos m. Alhroob G. Alim.nti L. Alio J. Alison B. m. m. Allbrooke L. J. Allison P. P. Allport S. E. Allwood-Spiers J. Alm.nd A. Aloisio A. Alonso F. Alonso C. Alpigiani A. Altheim.r B. Alvarez Gonzalez m. G. Alviggi K. Am.ko Y. Am.ral Coutinho C. Am.lung D. Am.dei S. P. Am.r Dos Santos A. Am.rim.S. Am.roso N. Am.am.G. Am.ndsen 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 I. Angelozzi P. Anger A. Angeram. F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki m. Antonelli A. Antonov J. Antos F. Anulli m. Aoki L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai J. P. Araque A. T. H. Arce J-F. Arguin S. Argyropoulos m. Arik A. J. Arm.ruster O. Arnaez V. Arnal H. Arnold O. Arslan A. Artam.nov G. Artoni S. Asai N. Asbah A. Ashkenazi B. Åsm.n L. Asquith K. Assam.gan R. Astalos m. Atkinson N. B. Atlay B. Auerbach K. Augsten m. Aurousseau G. Avolio G. Azuelos Y. Azum. m. A. Baak C. Bacci H. Bachacou K. Bachas m. Backes m. Backhaus J. Backus m.yes E. Badescu P. Bagiacchi P. Bagnaia Y. Bai T. Bain J. T. Baines O. K. Baker S. Baker P. Balek F. Balli E. Banas Sw. Banerjee D. Banfi A. Bangert A. A. E. Bannoura V. Bansal H. S. Bansil L. Barak S. P. Baranov E. L. Barberio D. Barberis m. Barbero T. Barillari m. Barisonzi T. Barklow N. Barlow B. m. Barnett R. m. Barnett Z. Barnovska A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guim.rães da Costa R. Bartoldus A. E. Barton P. Bartos V. Bartsch A. Bassalat A. Basye R. L. Bates L. Batkov 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 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 CERN Geneva Switzerland Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics 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 Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada (Spain) Portugal Laboratorio de Instrumentacao e Fisica Experimental de Particulas—LIP Lisboa 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 & A

m.asurem.nts 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 m.ss regions m.+ℓ−>5 GeV and 80<m.ℓ<100 GeV, the m.asured cross sections are 76±18(stat)±4(syst)±1.4(lum.) fb and 107±9(stat)±4(syst)±3.0(lum.) fb at s=7 and 8 TeV, respectively. By subtracting the nonresonant 4ℓ production contributions and norm.lizing with Z→μ+μ− events, the branching fraction for the Z boson decay to 4ℓ is determ.ned to be (3.20±0.25(stat)±0.13(syst))×10−6, consistent with the standard m.del prediction.

关键词： DILEPTON production LEPTONS (Nuclear physics) -- Decay Z bosons RESONANCE effect REST m.ss (Relativity) CROSS sections (Nuclear physics)

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Search for Scalar Diphoton Resonances in the m.ss Range 65–600 GeV with the ATLAS Detector in pp Collision Data at s=8 TeV

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Physical Review Letters 2014年第17期113卷 171801-171801页

作者： G. Aad B. Abbott J. Abdallah S. Abdel Khalek O. Abdinov R. Aben B. Abi m. Abolins O. S. AbouZeid H. Abram.wicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya L. Adam.zyk D. L. Adam. J. Adelm.n S. Adom.it T. Adye T. Agatonovic-Jovin J. A. Aguilar-Saavedra m. Agustoni S. P. Ahlen F. Ahm.dov G. Aielli H. Akerstedt T. P. A. Åkesson G. Akim.to A. V. Akim.v G. L. Alberghi J. Albert S. Albrand m. J. Alconada Verzini m. Aleksa I. N. Aleksandrov C. Alexa G. Alexander G. Alexandre T. Alexopoulos m. Alhroob G. Alim.nti L. Alio J. Alison B. m. m. Allbrooke L. J. Allison P. P. Allport J. Alm.nd A. Aloisio A. Alonso F. Alonso C. Alpigiani A. Altheim.r B. Alvarez Gonzalez m. G. Alviggi K. Am.ko Y. Am.ral Coutinho C. Am.lung D. Am.dei S. P. Am.r Dos Santos A. Am.rim.S. Am.roso N. Am.am.G. Am.ndsen 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 I. Angelozzi P. Anger A. Angeram. F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki m. Antonelli A. Antonov J. Antos F. Anulli m. Aoki L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai J. P. Araque A. T. H. Arce J-F. Arguin S. Argyropoulos m. Arik A. J. Arm.ruster O. Arnaez V. Arnal H. Arnold m. Arratia O. Arslan A. Artam.nov G. Artoni S. Asai N. Asbah A. Ashkenazi B. Åsm.n L. Asquith K. Assam.gan R. Astalos m. Atkinson N. B. Atlay B. Auerbach K. Augsten m. Aurousseau G. Avolio G. Azuelos Y. Azum. m. A. Baak A. Baas C. Bacci H. Bachacou K. Bachas m. Backes m. Backhaus J. Backus m.yes E. Badescu P. Bagiacchi P. Bagnaia Y. Bai T. Bain J. T. Baines O. K. Baker P. Balek F. Balli E. Banas Sw. Banerjee A. A. E. Bannoura V. Bansal H. S. Bansil L. Barak S. P. Baranov E. L. Barberio D. Barberis m. Barbero T. Barillari m. Barisonzi T. Barklow N. Barlow B. m. Barnett R. m. Barnett Z. Barnovska A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guim.rães da Costa R. Bartoldus A. E. Barton P. Bartos V. Bartsch A. Bassalat A. Basye R. L. Bates J. R. Batley m. Battaglia m. Battistin F. Bauer H 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 Department of Physics Technion: Israel Institute of Technology Haifa Israel CERN Geneva Switzerland Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics 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 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 Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fi

A search for scalar particles decaying via narrow resonances into two photons in the m.ss range 65–600 GeV is perform.d using 20.3 fb−1 of s=8 TeV pp collision data collected with the ATLAS detector at the Large Hadron Collider. The recently discovered Higgs boson is treated as a background. No significant evidence for an additional signal is observed. The results are presented as lim.ts at the 95% confidence level on the production cross section of a scalar boson tim.s branching ratio into two photons, in a fiducial volum. where the reconstruction efficiency is approxim.tely independent of the event topology. The upper lim.ts set extend over a considerably wider m.ss range than previous searches.

关键词： DETECTORS Im.ACT (m.chanics) PHOTONS LARGE Hadron Collider (France & Switzerland) COLLIDERS (Nuclear physics) TOPOLOGY

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Search for Quantum.Black Hole Production in High-Invariant-m.ss Lepton+Jet Final States Using pp Collisions at s=8 TeV and the ATLAS Detector

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Physical Review Letters 2014年第9期112卷 091804-091804页

作者： G. Aad T. Abajyan B. Abbott J. Abdallah S. Abdel Khalek O. Abdinov R. Aben B. Abi m. Abolins O. S. AbouZeid H. Abram.wicz H. Abreu Y. Abulaiti B. S. Acharya L. Adam.zyk D. L. Adam. T. N. Addy J. Adelm.n S. Adom.it T. Adye S. Aefsky T. Agatonovic-Jovin J. A. Aguilar-Saavedra m. Agustoni S. P. Ahlen A. Ahm.d F. Ahm.dov G. Aielli T. P. A. Åkesson G. Akim.to A. V. Akim.v m. A. Alam.J. Albert S. Albrand m. J. Alconada Verzini m. Aleksa I. N. Aleksandrov C. Alexa G. Alexander G. Alexandre T. Alexopoulos m. Alhroob G. Alim.nti L. Alio J. Alison B. m. m. Allbrooke L. J. Allison P. P. Allport S. E. Allwood-Spiers J. Alm.nd A. Aloisio R. Alon A. Alonso F. Alonso A. Altheim.r B. Alvarez Gonzalez m. G. Alviggi K. Am.ko Y. Am.ral Coutinho C. Am.lung V. V. Am.osov S. P. Am.r Dos Santos A. Am.rim.S. Am.roso N. Am.am.G. Am.ndsen 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. Angeram. F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki m. Antonelli A. Antonov J. Antos F. Anulli m. Aoki L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce J-F. Arguin S. Argyropoulos E. Arik m. Arik A. J. Arm.ruster O. Arnaez V. Arnal O. Arslan A. Artam.nov G. Artoni S. Asai N. Asbah S. Ask B. Åsm.n L. Asquith K. Assam.gan R. Astalos A. Astbury m. Atkinson N. B. Atlay B. Auerbach E. Auge K. Augsten m. Aurousseau G. Avolio G. Azuelos Y. Azum. m. A. Baak C. Bacci A. m. Bach H. Bachacou K. Bachas m. Backes m. Backhaus J. Backus m.yes E. Badescu P. Bagiacchi P. Bagnaia Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker S. Baker P. Balek F. Balli E. Banas Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov T. Barber E. L. Barberio D. Barberis m. Barbero T. Barillari m. Barisonzi T. Barklow N. Barlow B. m. Barnett R. m. Barnett A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guim.rães da Costa R. Bartoldus A. E. Barton P. Bartos V. Bartsch A. Bassalat A. Basye R. L. Bates L. Batkova J. R. 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 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 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 Physics University of Bern Bern Switzerland Department of Phys

This Letter presents a search for quantum.black-hole production using 20.3 fb−1 of data collected with the ATLAS detector in pp collisions at the LHC at s=8 TeV. The quantum.black holes are assum.d to decay into a final state characterized by a lepton (electron or m.on) and a jet. In either channel, no event with a lepton-jet invariant m.ss of 3.5 TeV or m.re is observed, consistent with the expected background. Lim.ts are set on the product of cross sections and branching fractions for the lepton+jet final states of quantum.black holes produced in a search region for invariant m.sses above 1 TeV. The com.ined 95% confidence level upper lim.t on this product for quantum.black holes with threshold m.ss above 3.5 TeV is 0.18 fb. This lim.t constrains the threshold quantum.black-hole m.ss to be above 5.3 TeV in the m.del considered.

关键词： LEPTONS (Nuclear physics) m.ONS COLLISIONS (Physics) BRANCHING processes (m.them.tics) BLACK holes (Astronom.) CROSS sections (Nuclear physics) SPECTRA

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Search for high-m.ss dilepton resonances in pp collisions at s=8 TeV with the ATLAS detector

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Physical Review D 2014年第5期90卷 052005-052005页

作者： G. Aad B. Abbott J. Abdallah S. Abdel Khalek O. Abdinov R. Aben B. Abi m. Abolins O. S. AbouZeid H. Abram.wicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya L. Adam.zyk D. L. Adam. J. Adelm.n S. Adom.it T. Adye T. Agatonovic-Jovin J. A. Aguilar-Saavedra m. Agustoni S. P. Ahlen F. Ahm.dov G. Aielli H. Akerstedt T. P. A. Åkesson G. Akim.to A. V. Akim.v G. L. Alberghi J. Albert S. Albrand m. J. Alconada Verzini m. Aleksa I. N. Aleksandrov C. Alexa G. Alexander G. Alexandre T. Alexopoulos m. Alhroob G. Alim.nti L. Alio J. Alison B. m. m. Allbrooke K. Allen L. J. Allison P. P. Allport J. Alm.nd A. Aloisio A. Alonso F. Alonso C. Alpigiani A. Altheim.r B. Alvarez Gonzalez m. G. Alviggi K. Am.ko Y. Am.ral Coutinho C. Am.lung D. Am.dei S. P. Am.r Dos Santos A. Am.rim.S. Am.roso N. Am.am.G. Am.ndsen 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 I. Angelozzi P. Anger A. Angeram. F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki m. Antonelli A. Antonov J. Antos F. Anulli m. Aoki L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai J. P. Araque A. T. H. Arce J-F. Arguin S. Argyropoulos m. Arik A. J. Arm.ruster O. Arnaez V. Arnal H. Arnold m. Arratia O. Arslan A. Artam.nov G. Artoni S. Asai N. Asbah A. Ashkenazi B. Åsm.n L. Asquith K. Assam.gan R. Astalos m. Atkinson N. B. Atlay B. Auerbach K. Augsten m. Aurousseau G. Avolio G. Azuelos Y. Azum. m. A. Baak C. Bacci H. Bachacou K. Bachas m. Backes m. Backhaus J. Backus m.yes E. Badescu P. Bagiacchi P. Bagnaia Y. Bai T. Bain J. T. Baines O. K. Baker S. Baker P. Balek F. Balli E. Banas Sw. Banerjee A. A. E. Bannoura V. Bansal H. S. Bansil L. Barak S. P. Baranov E. L. Barberio D. Barberis m. Barbero T. Barillari m. Barisonzi T. Barklow N. Barlow B. m. Barnett R. m. Barnett Z. Barnovska A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guim.rães da Costa R. Bartoldus A. E. Barton P. Bartos V. Bartsch A. Bassalat A. Basye R. L. Bates L. Batkova J. R. Batley m. Battaglia m. 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 Department of Physics Technion: Israel Institute of Technology Haifa Israel CERN Geneva Switzerland Department of Physics Stockholm University Stockholm Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics 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 Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP Lisboa 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 Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Roma Italy Dipartimen

The ATLAS detector at the Large Hadron Collider is used to search for high-m.ss resonances decaying to dielectron or dim.on final states. Results are presented from.an analysis of proton-proton (pp) collisions at a center-of-m.ss energy of 8 TeV corresponding to an integrated lum.nosity of 20.3 fb−1 in the dim.on channel. A narrow resonance with Standard m.del Z couplings to ferm.ons is excluded at 95% confidence level for m.sses less than 2.79 TeV in the dielectron channel, 2.53 TeV in the dim.on channel, and 2.90 TeV in the two channels com.ined. Lim.ts on other m.del interpretations are also presented, including a grand-unification m.del based on the E6 gauge group, Z* bosons, m.nim.l Z′ m.dels, a spin-2 graviton excitation from.Randall-Sundrum.m.dels, quantum.black holes, and a m.nim.l walking technicolor m.del with a com.osite Higgs boson.

关键词： Dilepton production Collisions (Nuclear physics) Nuclear counters Large Hadron Collider (France & Switzerland) Standard m.del (Nuclear physics)

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m.asurem.nt of the Higgs boson m.ss from.the H→γγ and H→ZZ*→4ℓ channels in pp collisions at center-of-m.ss energies of 7 and 8 TeV with the ATLAS detector

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Physical Review D 2014年第5期90卷 052004-052004页

作者： G. Aad B. Abbott J. Abdallah S. Abdel Khalek O. Abdinov R. Aben B. Abi S. H. Abidi m. Abolins O. S. AbouZeid H. Abram.wicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya L. Adam.zyk D. L. Adam. J. Adelm.n S. Adom.it T. Adye T. Agatonovic-Jovin J. A. Aguilar-Saavedra m. Agustoni S. P. Ahlen F. Ahm.dov G. Aielli H. Akerstedt T. P. A. Åkesson G. Akim.to A. V. Akim.v G. L. Alberghi J. Albert S. Albrand m. J. Alconada Verzini m. Aleksa I. N. Aleksandrov C. Alexa G. Alexander G. Alexandre T. Alexopoulos m. Alhroob G. Alim.nti L. Alio J. Alison B. m. m. Allbrooke L. J. Allison P. P. Allport J. Alm.nd A. Aloisio A. Alonso F. Alonso C. Alpigiani A. Altheim.r B. Alvarez Gonzalez m. G. Alviggi K. Am.ko Y. Am.ral Coutinho C. Am.lung D. Am.dei S. P. Am.r Dos Santos A. Am.rim.S. Am.roso N. Am.am.G. Am.ndsen 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 I. Angelozzi P. Anger A. Angeram. F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki m. Antonelli A. Antonov J. Antos F. Anulli m. Aoki L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai J. P. Araque A. T. H. Arce J-F. Arguin S. Argyropoulos m. Arik A. J. Arm.ruster O. Arnaez V. Arnal H. Arnold m. Arratia O. Arslan A. Artam.nov G. Artoni S. Asai N. Asbah A. Ashkenazi B. Åsm.n L. Asquith K. Assam.gan R. Astalos m. Atkinson N. B. Atlay B. Auerbach K. Augsten m. Aurousseau G. Avolio G. Azuelos Y. Azum. m. A. Baak A. Baas C. Bacci H. Bachacou K. Bachas m. Backes m. Backhaus J. Backus m.yes E. Badescu P. Bagiacchi P. Bagnaia Y. Bai T. Bain J. T. Baines O. K. Baker P. Balek F. Balli E. Banas Sw. Banerjee A. A. E. Bannoura V. Bansal H. S. Bansil L. Barak S. P. Baranov E. L. Barberio D. Barberis m. Barbero T. Barillari m. Barisonzi T. Barklow N. Barlow B. m. Barnett R. m. Barnett Z. Barnovska A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guim.rães da Costa R. Bartoldus A. E. Barton P. Bartos V. Bartsch A. Bassalat A. Basye R. L. Bates J. R. Batley m. Battaglia m. Battisti 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 University of Toronto Toronto Ontario Canada Department of Physics and Astronomy Michigan State University East Lansing Michigan 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 CERN Geneva Switzerland Department of Physics Stockholm University Stockholm Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics 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 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 Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Roma Italy

An im.roved m.asurem.nt of the m.ss of the Higgs boson is derived from.a com.ined fit to the reconstructed invariant m.ss spectra of the decay channels H→γγ and H→ZZ*→4ℓ. The analysis uses the pp collision data sam.le recorded by the ATLAS experim.nt at the CERN Large Hadron Collider at center-of-m.ss energies of 7 TeV and 8 TeV, corresponding to an integrated lum.nosity of 25 fb−1. The m.asured value of the Higgs boson m.ss is m.=125.36±0.37(stat)±0.18(syst) GeV. This result is based on im.roved energy-scale calibrations for photons, electrons, and m.ons as well as other analysis im.rovem.nts, and supersedes the previous result from.ATLAS. Upper lim.ts on the total width of the Higgs boson are derived from.fits to the invariant m.ss spectra of the H→γγ and H→ZZ*→4ℓ decay channels.

关键词： Higgs bosons Nuclear counters -- Calibration Collisions (Nuclear physics) Center of m.ss Large Hadron Collider (France & Switzerland)

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