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2009 international Conference on Artificial intelligence, iCAi 2009

作者： Mishra, A.K.K. Nishant Chauhan, B. Akash Punhani, C. Department of Computer Science and Engineering MNNIT Allahabad Uttar Pradesh India Department of Chemistry K.R. College Mathura Uttar Pradesh India Department of Computer Science and Engineering F.E.T. R.B.S. College Agra Uttar Pradesh India

ISBN: (纸本)9781601321091

in this paper, a back propagation training algorithm is used to predict the yield of various aromatic plants in saline environment. the yield of a crop depends on many factors like salinity level, crop cutting and type of yield. We have studied all these factors and with the help of preexisting experimental data we prepare a mathematical model for predicting the yield of a crop.

关键词： Crops

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touch me wear: Getting physical with social networks

Touch me wear: Getting physical with social networks

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2009 iEEE international Conference on social Computing, socialCom 2009

作者： Beachy, Aaron Rayy, Baishakhi Buechleyz, Leah Department of Computer Science College of Engineering and Applied Science University of Colorado Boulder CO 80309-0430 United States M.I.T. Department of Computer Science University of Colorado Boulder CO 80309-0430 United States

ISBN: (纸本)9780769538235

this project explores possibilities of association between existing social network information and real-world physical interaction. these possibilities are explored through the integration of wearables technology with mobile social network technology. We use the term "mobile social networking" to refer to those advanced interactions which integrate complex real world actions with online social network information. this project focuses particularly on the physical aspects of mobile social networks as basic as human touch. touch Me wE@r is able to associate social network identities with real world physical contact and in turn advertise that information online or use it real-time within the physical world. As a proof of concept, the touch Me wE@r application was implemented. touch Me wE@r changes the color of one's shirt depending on who they have hugged. Also the details of who was hugged and when are advertised on the user's social network profile. One can imagine many other interesting uses for this technology. the possibilities and implications of this technology are discussed. © 2009 iEEE.

关键词： social networking (online)

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Determination of fs/fd for 7 teV pp Collisions and Measurement of the B0→D−K+ Branching Fraction

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Physical Review Letters 2011年第21期107卷 211801-211801页

作者： R. Aaij B. Adeva M. Adinolfi C. Adrover A. Affolder Z. Ajaltouni J. Albrecht F. Alessio M. Alexander G. Alkhazov P. Alvarez Cartelle A. A. Alves, Jr. s. Amato Y. Amhis J. Amoraal J. Anderson R. B. Appleby O. Aquines Gutierrez L. Arrabito A. Artamonov M. Artuso E. Aslanides G. Auriemma s. Bachmann J. J. Back D. s. Bailey V. Balagura W. Baldini R. J. Barlow C. Barschel s. Barsuk W. Barter A. Bates C. Bauer th. Bauer A. Bay i. Bediaga K. Belous i. Belyaev E. Ben-Haim M. Benayoun G. Bencivenni s. Benson J. Benton R. Bernet M.-O. Bettler M. van Beuzekom A. Bien s. Bifani A. Bizzeti P. M. Bjørnstad t. Blake F. Blanc C. Blanks J. Blouw s. Blusk A. Bobrov V. Bocci A. Bondar N. Bondar W. Bonivento s. Borghi A. Borgia t. J. V. Bowcock C. Bozzi t. Brambach J. van den Brand J. Bressieux s. Brisbane M. Britsch t. Britton N. H. Brook A. Büchler-Germann A. Bursche J. Buytaert s. Cadeddu J. M. Caicedo Carvajal O. Callot M. Calvi M. Calvo Gomez A. Camboni P. Campana A. Carbone G. Carboni R. Cardinale A. Cardini L. Carson K. Carvalho Akiba G. Casse M. Cattaneo M. Charles Ph. Charpentier N. Chiapolini X. Cid Vidal P. E. L. Clarke M. Clemencic H. V. Cliff J. Closier C. Coca V. Coco J. Cogan P. Collins F. Constantin G. Conti A. Contu A. Cook M. Coombes G. Corti G. A. Cowan R. Currie B. D’Almagne C. D’Ambrosio P. David P. N. Y. David i. De Bonis s. De Capua M. De Cian F. De Lorenzi J. M. De Miranda L. De Paula P. De simone D. Decamp M. Deckenhoff H. Degaudenzi M. Deissenroth L. Del Buono C. Deplano O. Deschamps F. Dettori J. Dickens H. Dijkstra P. Diniz Batista D. Dossett A. Dovbnya F. Dupertuis R. Dzhelyadin C. Eames s. Easo U. Egede V. Egorychev s. Eidelman D. van Eijk F. Eisele s. Eisenhardt R. Ekelhof L. Eklund Ch. Elsasser D. G. d’Enterria D. Esperante Pereira L. Estève A. Falabella E. Fanchini C. Färber G. Fardell C. Farinelli s. Farry V. Fave V. Fernandez Albor M. Ferro-Luzzi s. Filippov C. Fitzpatrick M. Fontana F. Fontanelli R. Forty M. Frank C. Frei M. Frosini s. Furcas A. Gallas torreira D. Galli M. Gandelman P. Gandini Y. Nikhef National Institute for Subatomic Physics Amsterdam The Netherlands Universidad de Santiago de Compostela Santiago de Compostela Spain H. H. Wills Physics Laboratory University of Bristol Bristol United Kingdom CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Clermont Université Université Blaise Pascal CNRS/IN2P3 LPC Clermont-Ferrand France European Organization for Nuclear Research (CERN) Geneva Switzerland School of Physics and Astronomy University of Glasgow Glasgow United Kingdom Petersburg Nuclear Physics Institute (PNPI) Gatchina Russia Sezione INFN di Roma La Sapienza Roma Italy Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland Physik-Institut Universität Zürich Zürich Switzerland School of Physics and Astronomy University of Manchester Manchester United Kingdom Max-Planck-Institut für Kernphysik (MPIK) Heidelberg Germany CC-IN2P3 CNRS/IN2P3 Lyon-Villeurbanne France† Institute for High Energy Physics (IHEP) Protvino Russia Syracuse University Syracuse New York USA Università di Roma La Sapienza Roma Italy Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Department of Physics University of Warwick Coventry United Kingdom Institute of Theoretical and Experimental Physics (ITEP) Moscow Russia Sezione INFN di Ferrara Ferrara Italy LAL Université Paris-Sud CNRS/IN2P3 Orsay France Cavendish Laboratory University of Cambridge Cambridge United Kingdom Centro Brasileiro de Pesquisas Físicas (CBPF) Rio de Janeiro Brazil LPNHE Université Pierre et Marie Curie Université Paris Diderot CNRS/IN2P3 Paris France Laboratori Nazionali dell’INFN di Frascati Frascati Italy School of Physics and Astronomy University of Edinburgh Edinburgh United Kingdom Sezione INFN di Firenze Firenze Italy School of Physics University College Dublin Dublin

the relative abundance of the three decay modes B0→D−K+, B0→D−π+, and Bs0→Ds−π+ produced in 7 teV pp collisions at the LHC is determined from data corresponding to an integrated luminosity of 35 pb−1. the branching fraction of B0→D−K+ is found to be B(B0→D−K+)=(2.01±0.18stat±0.14syst)×10−4. the ratio of fragmentation fractions fs/fd is determined through the relative abundance of Bs0→Ds−π+ to B0→D−K+ and B0→D−π+, leading to fs/fd=0.253±0.017±0.017±0.020, where the uncertainties are statistical, systematic, and theoretical, respectively.

关键词： iMAGE COLLisiONs (Physics) BRANCHiNG ratios (Nuclear physics) LUMiNEsCENCE REstRiCtiONs

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Measurement of the W+W− Cross section in s=7 teV pp Collisions with AtLAs

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Physical Review Letters 2011年第4期107卷 041802-041802页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. s. Acharya D. L. Adams t. N. Addy J. Adelman M. Aderholz s. Adomeit P. Adragna t. Adye s. Aefsky J. A. Aguilar-saavedra M. Aharrouche s. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli t. Akdogan t. P. A. Åkesson G. Akimoto A. V. Akimov A. Akiyama M. s. Alam M. A. Alam s. Albrand M. Aleksa i. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre t. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós N. Amram C. Anastopoulos t. Andeen C. F. Anders K. J. Anderson A. Andreazza V. Andrei M-L. Andrieux X. s. Anduaga A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli s. Antonelli A. Antonov J. Antos F. Anulli s. Aoun L. Aperio Bella R. Apolle G. Arabidze i. Aracena Y. Arai A. t. H. Arce J. P. Archambault s. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov s. Asai R. Asfandiyarov s. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert B. Auerbach E. Auge K. Augsten M. Aurousseau N. Austin R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes M. Backhaus E. Badescu P. Bagnaia s. Bahinipati Y. Bai D. C. Bailey t. Bain J. t. Baines O. K. Baker M. D. Baker s. Baker F. Baltasar Dos santos Pedrosa E. Banas P. Banerjee sw. Banerjee D. Banfi A. Bangert V. Bansal H. s. Bansil L. Barak s. P. Baranov A. Barashkou A. Barbaro Galtieri 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 A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch V. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Battist Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg i.Br. Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Universitat Autònoma de Barcelona and ICREA Barcelona Spain Section de Physique Université de Genève Geneva Switzerland Department of Physics Oxford University Oxford United Kingdom Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Department of Physics Oklahoma State University Stillwater Oklahoma USA 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 LAL Univ. Paris-Sud and CNRS/IN2P3 Orsay France INFN Sezione di Milano Italy Dipartimento di Fisica Università di Milano Milano Italy INFN Gruppo Collegato di Udine Italy ICTP Trieste Italy 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 Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) München Germany Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics 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 Portugal Institut für Physik Universität Mainz Mainz Germany Department of Physics Boston University Boston Massachusetts USA Department of Physics and Astronomy Stony Brook University Stony Brook New York USA Physics Department University of Texas at Dallas Richardson Texas USA INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Università di Roma Tor Vergata Roma Italy Depart

this Letter presents a measurement of the W+W− production cross section in s=7 teV pp collisions by the AtLAs experiment, using 34 pb−1 of integrated luminosity produced by the Large Hadron Collider at CERN. selecting events with two isolated leptons, each either an electron or a muon, 8 candidate events are observed with an expected background of 1.7±0.6 events. the measured cross section is 41−16+20(stat)±5(syst)±1(lumi) pb, which is consistent with the standard model prediction of 44±3 pb calculated at next-to-leading order in QCD.

关键词： Elementary particles

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search for Dilepton Resonances in pp Collisions at s=7 teV with the AtLAs Detector

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Physical Review Letters 2011年第27期107卷 272002-272002页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. s. Acharya D. L. Adams t. N. Addy J. Adelman M. Aderholz s. Adomeit P. Adragna t. Adye s. Aefsky J. A. Aguilar-saavedra M. Aharrouche s. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli t. Akdogan t. P. A. Åkesson G. Akimoto A. V. Akimov A. Akiyama M. s. Alam M. A. Alam J. Albert s. Albrand M. Aleksa i. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre t. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós 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 A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli s. Aoun L. Aperio Bella R. Apolle G. Arabidze i. Aracena Y. Arai A. t. H. Arce J. P. Archambault s. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov s. Asai R. Asfandiyarov s. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert E. Auge K. Augsten M. Aurousseau N. Austin G. Avolio R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes M. Backhaus E. Badescu P. Bagnaia s. Bahinipati Y. Bai D. C. Bailey t. Bain J. t. Baines O. K. Baker M. D. Baker s. Baker E. Banas P. Banerjee sw. Banerjee D. Banfi A. Bangert V. Bansal H. s. Bansil L. Barak s. P. Baranov A. Barashkou A. Barbaro Galtieri 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 Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch V. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Ba Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg i.Br. 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 Section de Physique Université de Genève Geneva Switzerland Department of Physics Oxford University Oxford United Kingdom Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Department of Physics Oklahoma State University Stillwater Oklahoma USA 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 LAL Univ. Paris-Sud and CNRS/IN2P3 Orsay France INFN Sezione di Milano Milano Italy Dipartimento di Fisica Università di Milano Milano Italy INFN Gruppo Collegato di Udine Udine Italy ICTP Trieste Italy 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 Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) München Germany Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics 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 Portugal Institut für Physik Universität Mainz Mainz Germany Department of Physics Boston University Boston Massachusetts USA Department of Physics and Astronomy Stony Brook University Stony Brook New York USA Physics Department University of Texas at Dallas Richardson Texas USA INFN Sezione di Roma Tor Vergata Roma Italy Dipartimento di Fisica

this Letter reports on a search for narrow high-mass resonances decaying into dilepton final states. the data were recorded by the AtLAs experiment in pp collisions at s=7 teV at the Large Hadron Collider and correspond to a total integrated luminosity of 1.08 (1.21) fb−1 in the e+e− (μ+μ−) channel. No statistically significant excess above the standard model expectation is observed and upper limits are set at the 95% C.L. on the cross section times branching fraction of Z′ resonances and Randall-sundrum gravitons decaying into dileptons as a function of the resonance mass. A lower mass limit of 1.83 teV on the sequential standard model Z′ boson is set. A Randall-sundrum graviton with coupling k/M¯Pl=0.1 is excluded at 95% C.L. for masses below 1.63 teV.

关键词： DiLEPtON production LARGE Hadron Collider (France & switzerland) REsONANCE HADRON colliders stANDARD model (Nuclear physics) Z bosons

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Measurement of Dijet Azimuthal Decorrelations in pp Collisions at s=7 teV

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Physical Review Letters 2011年第17期106卷 172002-172002页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. s. Acharya D. L. Adams t. N. Addy J. Adelman M. Aderholz s. Adomeit P. Adragna t. Adye s. Aefsky J. A. Aguilar-saavedra 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 s. Albrand M. Aleksa i. N. Aleksandrov M. Aleppo F. Alessandria C. Alexa G. Alexander G. Alexandre t. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós N. Amram C. Anastopoulos t. Andeen C. F. Anders K. J. Anderson A. Andreazza V. Andrei M-L. Andrieux X. s. Anduaga A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli s. Antonelli A. Antonov J. Antos F. Anulli s. Aoun L. Aperio Bella R. Apolle G. Arabidze i. Aracena Y. Arai A. t. H. Arce J. P. Archambault s. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov s. Asai R. Asfandiyarov s. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert B. Auerbach E. Auge K. Augsten M. Aurousseau N. Austin R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes M. Backhaus E. Badescu P. Bagnaia s. Bahinipati Y. Bai D. C. Bailey t. Bain J. t. Baines O. K. Baker M. D. Baker s. Baker F. Baltasar Dos santos Pedrosa E. Banas P. Banerjee sw. Banerjee D. Banfi A. Bangert V. Bansal H. s. Bansil L. Barak s. P. Baranov A. Barashkou A. Barbaro Galtieri 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 A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch V. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Battisti Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg i.Br. Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Universitat Autònoma de Barcelona and ICREA Barcelona Spain Section de Physique Université de Genève Geneva Switzerland Department of Physics Oxford University Oxford United Kingdom Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Department of Physics Oklahoma State University Stillwater Oklahoma USA 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 LAL Univ. Paris-Sud and CNRS/IN2P3 Orsay France INFN Sezione di Milano Milano Italy Dipartimento di Fisica Università di Milano Milano Italy INFN Gruppo Collegato di Udine Trieste Italy ICTP Trieste Italy 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 Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) München Germany Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics 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 Portugal Institut für Physik Universität Mainz Mainz Germany Department of Physics Boston University Boston Massachusetts USA Department of Physics and Astronomy Stony Brook University Stony Brook New York USA Physics Department University of Texas at Dallas Richardson Texas USA INFN Sezione di Roma Tor Vergata Roma Italy Dipartimento di Fisica Università di Roma Tor Vergata Roma

Azimuthal decorrelations between the two central jets with the largest transverse momenta are sensitive to the dynamics of events with multiple jets. We present a measurement of the normalized differential cross section based on the full data set (∫Ldt=36 pb−1) acquired by the AtLAs detector during the 2010 s=7 teV proton-proton run of the LHC. the measured distributions include jets with transverse momenta up to 1.3 teV, probing perturbative QCD in a high-energy regime.

关键词： Atomic physics

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search for the Higgs Boson in the H→WW→lνjj Decay Channel in pp Collisions at s=7 teV with the AtLAs Detector

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Physical Review Letters 2011年第23期107卷 231801-231801页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. s. Acharya D. L. Adams t. N. Addy J. Adelman M. Aderholz s. Adomeit P. Adragna t. Adye s. Aefsky J. A. Aguilar-saavedra M. Aharrouche s. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli t. Akdogan t. P. A. Åkesson G. Akimoto A. V. Akimov A. Akiyama M. s. Alam M. A. Alam J. Albert s. Albrand M. Aleksa i. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre t. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós 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 A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli s. Aoun L. Aperio Bella R. Apolle G. Arabidze i. Aracena Y. Arai A. t. H. Arce J. P. Archambault s. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov s. Asai R. Asfandiyarov s. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert E. Auge K. Augsten M. Aurousseau N. Austin G. Avolio R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes M. Backhaus E. Badescu P. Bagnaia s. Bahinipati Y. Bai D. C. Bailey t. Bain J. t. Baines O. K. Baker M. D. Baker s. Baker E. Banas P. Banerjee sw. Banerjee D. Banfi A. Bangert V. Bansal H. s. Bansil L. Barak s. P. Baranov A. Barashkou A. Barbaro Galtieri 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 Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch V. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Ba Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg i. Br. 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 Section de Physique Université de Genève Geneva Switzerland Department of Physics Oxford University Oxford United Kingdom Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Department of Physics Oklahoma State University Stillwater Oklahoma USA 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 LAL Univ. Paris-Sud and CNRS/IN2P3 Orsay France INFN Sezione di Milano Italy Dipartimento di Fisica Università di Milano Milano Italy INFN Gruppo Collegato di Udine Italy ICTP Trieste Italy 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 Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) München Germany Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics 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 Institut für Physik Universität Mainz Mainz Germany Department of Physics Boston University Boston Massachusetts USA Department of Physics and Astronomy Stony Brook University Stony Brook New York USA Physics Department University of Texas at Dallas Richardson Texas USA INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Università di Roma Tor Vergata R

A search for a Higgs boson has been performed in the H→WW→ℓνjj channel in 1.04 fb−1 of pp collision data at s=7 teV recorded with the AtLAs detector at the Large Hadron Collider. No significant excess of events is observed over the expected background and limits on the Higgs boson production cross section are derived for a Higgs boson mass in the range 240 GeVthe best sensitivity is reached for mH=400 GeV, where the 95% confidence level upper bound on the cross section for H→WW production is 3.1 pb, or 2.7 times the standard model prediction.

关键词： HiGGs bosons BOsONs LARGE Hadron Collider (France & switzerland) stANDARD model (Nuclear physics)

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search for a Heavy Particle Decaying into an Electron and a Muon with the AtLAs Detector in s=7 teV pp collisions at the LHC

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Physical Review Letters 2011年第25期106卷 251801-251801页

this Letter presents the first search for a heavy particle decaying into an e±μ∓ final state in s=7 teV pp collisions at the LHC. the data were recorded by the AtLAs detector during 2010 and correspond to a total integrated luminosity of 35 pb−1. No excess above the standard model background expectation is observed. Exclusions at 95% confidence level are placed on two representative models. in an R-parity violating supersymmetric model, tau sneutrinos with a mass below 0.75 teV are excluded, assuming all R-parity violating couplings are zero except λ311′=0.11 and λ312=0.07. in a lepton flavor violating model, a Z′-like vector boson with masses of 0.70–1.00 teV and corresponding cross sections times branching ratios of 0.175–0.183 pb is excluded. these results extend to higher mass R-parity violating sneutrinos and lepton flavor violating Z’s than previous constraints from the tevatron.

关键词： tellurium compounds

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search for supersymmetry Using Final states with One Lepton, Jets, and Missing transverse Momentum with the AtLAs Detector in s=7 teV pp Collisions

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Physical Review Letters 2011年第13期106卷 131802-131802页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. s. Acharya D. L. Adams t. N. Addy J. Adelman M. Aderholz s. Adomeit P. Adragna t. Adye s. Aefsky J. A. Aguilar-saavedra 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 s. Albrand M. Aleksa i. N. Aleksandrov M. Aleppo F. Alessandria C. Alexa G. Alexander G. Alexandre t. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós N. Amram C. Anastopoulos t. Andeen C. F. Anders K. J. Anderson A. Andreazza V. Andrei M-L. Andrieux X. s. Anduaga A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli s. Antonelli A. Antonov J. Antos F. Anulli s. Aoun L. Aperio Bella R. Apolle G. Arabidze i. Aracena Y. Arai A. t. H. Arce J. P. Archambault s. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov s. Asai R. Asfandiyarov s. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert B. Auerbach E. Auge K. Augsten M. Aurousseau N. Austin R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes M. Backhaus E. Badescu P. Bagnaia s. Bahinipati Y. Bai D. C. Bailey t. Bain J. t. Baines O. K. Baker M. D. Baker s. Baker F. Baltasar Dos santos Pedrosa E. Banas P. Banerjee sw. Banerjee D. Banfi A. Bangert V. Bansal H. s. Bansil L. Barak s. P. Baranov A. Barashkou A. Barbaro Galtieri 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 A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch V. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Battisti Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg i.Br. Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institut de Física d’Altes Energies and Universitat Autònoma de Barcelona and ICREA Barcelona Spain Section de Physique Université de Genève Geneva Switzerland Department of Physics Oxford University Oxford United Kingdom Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Department of Physics Oklahoma State University Stillwater Oklahoma USA 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 LAL Université Paris-Sud and CNRS/IN2P3 Orsay France INFN Sezione di Milano Italy Dipartimento di Fisica Università di Milano Milano Italy INFN Gruppo Collegato di Udine Italy ICTP Trieste Italy 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 Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) München Germany Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics 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 Portugal Institut für Physik Universität Mainz Mainz Germany Department of Physics Boston University Boston Massachusetts USA Department of Physics and Astronomy Stony Brook University Stony Brook New York USA Physics Department University of Texas at Dallas Richardson Texas USA INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Università di Roma Tor Vergata Roma Italy

this Letter presents the first search for supersymmetry in final states containing one isolated electron or muon, jets, and missing transverse momentum from s=7 teV proton-proton collisions at the LHC. the data were recorded by the AtLAs experiment during 2010 and correspond to a total integrated luminosity of 35 pb−1. No excess above the standard model background expectation is observed. Limits are set on the parameters of the minimal supergravity framework, extending previous limits. Within this framework, for A0=0 GeV, tan β=3, and μ>0 and for equal squark and gluino masses, gluino masses below 700 GeV are excluded at 95% confidence level.

关键词： supersymmetry

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search for a standard Model Higgs Boson in the H→ZZ→ℓ+ℓ−νν¯ Decay Channel with the AtLAs Detector

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Physical Review Letters 2011年第22期107卷 221802-221802页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. s. Acharya D. L. Adams t. N. Addy J. Adelman M. Aderholz s. Adomeit P. Adragna t. Adye s. Aefsky J. A. Aguilar-saavedra M. Aharrouche s. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli t. Akdogan t. P. A. Åkesson G. Akimoto A. V. Akimov A. Akiyama M. s. Alam M. A. Alam J. Albert s. Albrand M. Aleksa i. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre t. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport s. E. Allwood-spiers J. Almond A. Aloisio R. Alon A. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós 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 A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli s. Aoun L. Aperio Bella R. Apolle G. Arabidze i. Aracena Y. Arai A. t. H. Arce J. P. Archambault s. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov s. Asai R. Asfandiyarov s. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert E. Auge K. Augsten M. Aurousseau N. Austin G. Avolio R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes M. Backhaus E. Badescu P. Bagnaia s. Bahinipati Y. Bai D. C. Bailey t. Bain J. t. Baines O. K. Baker M. D. Baker s. Baker E. Banas P. Banerjee sw. Banerjee D. Banfi A. Bangert V. Bansal H. s. Bansil L. Barak s. P. Baranov A. Barashkou A. Barbaro Galtieri 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 Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch V. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Ba Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg i. Br. 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 Section de Physique Université de Genève Geneva Switzerland Department of Physics Oxford University Oxford United Kingdom Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Department of Physics Oklahoma State University Stillwater Oklahoma USA 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 LAL Univ. Paris-Sud and CNRS/IN2P3 Orsay France INFN Sezione di Milano Italy Dipartimento di Fisica Università di Milano Milano Italy INFN Gruppo Collegato di Udine Italy ICTP Trieste Italy 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 Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) München Germany Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics 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 Portugal Institut für Physik Universität Mainz Mainz Germany Department of Physics Boston University Boston Massachusetts USA Department of Physics and Astronomy Stony Brook University Stony Brook New York USA Physics Department University of Texas at Dallas Richardson Texas USA INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Università La Sapienza Rom

A search for a heavy standard model Higgs boson decaying via H→ZZ→ℓ+ℓ−νν¯, where ℓ=e, μ, is presented. it is based on proton-proton collision data at s=7 teV, collected by the AtLAs experiment at the LHC in the first half of 2011 and corresponding to an integrated luminosity of 1.04 fb−1. the data are compared to the expected standard model backgrounds. the data and the background expectations are found to be in agreement and upper limits are placed on the Higgs boson production cross section over the entire mass window considered; in particular, the production of a standard model Higgs boson is excluded in the region 340t the 95% confidence level.

关键词： HiGGs bosons RADiOACtiVE decay PROtON-proton interactions stANDARD model (Nuclear physics) NUCLEAR models

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