Article Dans Une Revue Physical Review D Année : 2016

Measurement of the integrated and differential t-tbar production cross sections for high-pt top quarks in pp collisions at sqrt(s) = 8 TeV

V. Khachatryan , M. Besancon (1) , F. Couderc (1) , M. Dejardin (1) , D. Denegri (1) , B. Fabbro (1) , J.L. Faure (1) , C. Favaro (1) , F. Ferri (1) , S. Ganjour (1) , A. Givernaud (1) , P. Gras (1) , G. Hamel de Monchenault (1) , P. Jarry (1) , E. Locci (1) , M. Machet (1) , J. Malcles (1) , J. Rander (1) , A. Rosowsky (1) , M. Titov (1) , A. Zghiche (1) , A. Abdulsalam (2) , I. Antropov (2) , S. Baffioni (2) , F. Beaudette (2) , P. Busson (2) , L. Cadamuro (2) , E. Chapon (2) , C. Charlot (2) , O. Davignon (2) , L. Dobrzynski (2) , R. Granier de Cassagnac (2) , M. Jo (2) , S. Lisniak (2) , P. Miné (2) , I.N. Naranjo (2) , M. Nguyen (2) , C. Ochando (2) , G. Ortona (2) , P. Paganini (2) , P. Pigard (2) , S. Regnard (2) , R. Salerno (2) , Y. Sirois (2) , T. Strebler (2) , Y. Yilmaz (2) , A. Zabi (2) , J.-L. Agram (3) , J. Andrea (3) , A. Aubin (3) , D. Bloch (3) , J.-M. Brom (3) , M. Buttignol (3) , E.C. Chabert (3) , N. Chanon (3) , C. Collard (3) , E. Conte (3) , X. Coubez (3) , J.-C. Fontaine (3) , D. Gelé (3) , U. Goerlach (3) , C. Goetzmann (3) , A.-C. Le Bihan (3) , J.A. Merlin (3) , K. Skovpen (3) , P. Van Hove (3) , S. Gadrat (4) , S. Beauceron (5) , C. Bernet (5) , G. Boudoul (5) , E. Bouvier (5) , C.A. Carrillo Montoya (5) , R. Chierici (5) , D. Contardo (5) , B. Courbon (5) , P. Depasse (5) , H. El Mamouni (5) , J. Fan (5) , J. Fay (5) , S. Gascon (5) , M. Gouzevitch (5) , B. Ille (5) , Fabienne Lagarde (5) , I.B. Laktineh (5) , M. Lethuillier (5) , L. Mirabito (5) , A.L. Pequegnot (5) , S. Perries (5) , A. Popov (5) , J.D. Ruiz Alvarez (5) , D. Sabes (5) , V. Sordini (5) , M. Vander Donckt (5) , P. Verdier (5) , S. Viret (5)
V. Khachatryan
  • Fonction : Auteur
P. Busson
P. Paganini
T. Strebler
J.-L. Agram
E. Conte
D. Contardo

Résumé

The cross section for pair pp collisions, collected with the CMS detector at the LHC with sqrt(s) = 8 TeV in data corresponding to an integrated luminosity of 19.7 inverse-femtobarns. The measurement is performed using lepton+jets events, where one top quark decays semileptonically, while the second top quark decays to a hadronic final state. The hadronic decay is reconstructed as a single, large-radius jet, and identified as a top quark candidate using jet substructure techniques. The integrated cross section and the differential cross sections as a function of top quark pt and rapidity are measured at particle level within a fiducial region related to the detector-level requirements and at parton level. The particle-level integrated cross section is found to be sigma[t-tbar] = 0.499 +/- 0.035 (stat+syst) +/- 0.095 (theory) +/- 0.013 (lumi) pb for top quark pt > 400 GeV. The parton-level measurement is sigma[t-tbar] = 1.44 +/- 0.10 (stat+syst) +/- 0.29 (theory) +/- 0.04 (lumi) pb. The integrated and differential cross section results are compared to predictions from several event generators.

Dates et versions

in2p3-01310733 , version 1 (03-05-2016)

Identifiants

Citer

V. Khachatryan, M. Besancon, F. Couderc, M. Dejardin, D. Denegri, et al.. Measurement of the integrated and differential t-tbar production cross sections for high-pt top quarks in pp collisions at sqrt(s) = 8 TeV. Physical Review D, 2016, 94, pp.072002. ⟨10.1103/PhysRevD.94.072002⟩. ⟨in2p3-01310733⟩
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