Data di Pubblicazione:
2013
Abstract:
At the Large Hadron Collider, the identification of jets originating from b quarks is important for searches for new physics and for measurements of standard model processes. A variety of algorithms has been developed by CMS to select b-quark jets based on variables such as the impact parameters of charged-particle tracks, the properties of reconstructed decay vertices, and the presence or absence of a lepton, or combinations thereof. The performance of these algorithms has been measured using data from proton-proton collisions at the LHC and compared with expectations based on simulation. The data used in this study were recorded in 2011 at root s = 7TeV for a total integrated luminosity of 5.0 fb(-1). The efficiency for tagging b-quark jets has been measured in events from multijet and t-quark pair production. CMS has achieved a b-jet tagging efficiency of 85% for a light-parton misidentification probability of 10% in multijet events. For analyses requiring higher purity, a misidentification probability of only 1.5% has been achieved, for a 70% b-jet tagging efficiency.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
S. Chatrchyan;V. Khachatryan;A. M. Sirunyan;A. Tumasyan;W. Adam;E. Aguilo;T. Bergauer;M. Dragicevic;J. Eroe;C. Fabjan;M. Friedl;R. Fruehwirth;V. M. Ghete;J. Hammer;N. Hoermann;J. Hrubec;M. Jeitler;W. Kiesenhofer;V. Knunz;M. Krammer;I. Kraetschmer;D. Liko;I. Mikulec;M. Pernicka;B. Rahbaran;C. Rohringer;H. Rohringer;R. Schoefbeck;J. Strauss;A. Taurok;W. Waltenberger;G. Walzel;E. Widl;C. . E.;V. Mossolov;N. Shumeiko;J. S. Gonzalez;M. Bansal;S. Bansal;T. Cornelis;E. A. De;X. Janssen;S. Luyckx;L. Mucibello;S. Ochesanu;B. Roland;R. Rougny;M. Selvaggi;Z. Staykova;H. V. Haevermaet;P. V. Mechelen;N. V. Remortel;A. V. Spilbeeck;F. Blekman;S. Blyweert;J. D'Hondt;R. G. Suarez;A. Kalogeropoulos;M. Maes;A. Olbrechts;W. V. Doninck;P. V. Mulders;G. P. Van;I. Villella;B. Clerbaux;G. D. Lentdecker;V. Dero;A. P. R.;T. Hreus;A. Leonard;P. E. Marage;A. Mohammadi;T. Reis;L. Thomas;G. V. Marcken;C. V. Velde;P. Vanlaer;J. Wang;V. Adler;K. Beernaert;A. Cimmino;S. Costantini;G. Garcia;M. Grunewald;B. Klein;J. Lellouch;A. Marinov;J. Mccartin;A. A. Ocampo;D. Ryckbosch;N. Strobbe;F. Thyssen;M. Tytgat;P. Verwilligen;S. Walsh;E. Yazgan;N. Zaganidis;S. Basegmez;G. Bruno;R. Castello;L. Ceard;C. Delaere;T. d. Pree;D. Favart;L. Forthomme;A. Giammanco;J. Hollar;V. Lemaitre;J. Liao;O. Militaru;C. Nuttens;D. Pagano;A. Pin;K. Piotrzkowski;N. Schul;J. M. Vizan;N. Beliy;T. Caebergs;E. Daubie;G. H. Hammad;G. A. Alves;M. C. Martins;D. D. Jesus;T. Martins;M. E. Pol;M. H. G.;W. L. Alda;W. Carvalho;A. Custodio;E. M. Da;C. D. Oliveira;S. F. De;D. M. Figueiredo;L. Mundim;H. Nogima;V. Oguri;W. L. Prado;A. Santoro;L. S. Jorge;A. Sznajder;T. S. Anjos;C. A. Bernardes;F. A. Dias;T. R. Fernandez;E. M. Gregores;C. Lagana;F. Marinho;P. G. Mercadante;S. F. Novaes;S. S. Padula;V. Genchev;P. Iaydjiev;S. Piperov;M. Rodozov;S. Stoykova;G. Sultanov;V. Tcholakov;R. Trayanov;M. Vutova;A. Dimitrov;R. Hadjiiska;V. Kozhuharov;L. Litov;B. Pavlov;P. Petkov;J. G. Bian;G. M. Chen;H. S. Chen;C. H. Jiang;D. Liang;S. Liang;X. Meng;J. Tao;J. Wang;X. Wang;Z. Wang;H. Xiao;M. Xu;J. Zang;Z. Zhang;C. Asawatangtrakuldee;Y. Ban;S. Guo;Y. Guo;W. Li;S. Liu;Y. Mao;S. J. Qian;H. Teng;D. Wang;L. Zhang;B. Zhu;W. Zou;C. Avila;J. P. Gomez;B. G. Moreno;A. F. Osorio;J. C. Sanabria;N. Godinovic;D. Lelas;R. Plestina;D. Polic;I. Puljak;Z. Antunovic;M. Kovac;V. Brigljevic;S. Duric;K. Kadija;J. Luetic;S. Morovic;A. Attikis;M. Galanti;G. Mavromanolakis;J. Mousa;C. Nicolaou;F. Ptochos;P. A. Razis;M. Finger;J. F. M.;Y. Assran;S. Elgammal;A. E. Kamel;M. A. Mahmoud;A. Radi;M. Kadastik;M. Muentel;M. Raidal;L. Rebane;A. Tiko;P. Eerola;G. Fedi;M. Voutilainen;J. Harkonen;A. Heikkinen;V. Karimaki;R. Kinnunen;M. J. Kortelainen;T. Lampen;K. Lassila-Perini;S. Lehti;T. Linden;P. Luukka;T. Maenpaa;T. Peltola;E. Tuominen;J. Tuominiemi;E. Tuovinen;D. Ungaro;L. Wendland;K. Banzuzi;A. Karjalainen;A. Korpela;T. Tuuva;M. Besancon;S. Choudhury;M. Dejardin;D. Denegri;B. Fabbro;J. L. Faure;F. Ferri;S. Ganjour;A. Givernaud;P. Gras;G. H. de;P. Jarry;E. Locci;J. Malcles;L. Millischer;A. Nayak;J. Rander;A. Rosowsky;I. Shreyber;M. Titov;S. Baffioni;F. Beaudette;L. Benhabib;L. Bianchini;M. Bluj;C. Broutin;P. Busson;C. Charlot;N. Daci;T. Dahms;L. Dobrzynski;R. G. de;M. Haguenauer;P. Mine;C. Mironov;I. N. Naranjo;M. Nguyen;C. Ochando;P. Paganini;D. Sabes;R. Salerno;Y. Sirois;C. Veelken;A. Zabi;J. . L.;J. Andrea;D. Bloch;D. Bodin;J. . M.;M. Cardaci;E. C. Chabert;C. Collard;E. Conte;F. Drouhin;C. Ferro;J. . C.;D. Gele;U. Goerlach;P. Juillot;A. . C.;P. V. Hove;F. Fassi;D. Mercier;S. Beauceron;N. Beaupere;O. Bondu;G. Boudoul;J. Chasserat;R. Chierici;D. Contardo;P. Depasse;H. E. Mamouni;J. Fay;S. Gascon;M. Gouzevitch;B. Ille;T. Kurca;
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