Determination of the top-quark pole mass using $t \bar{t}+1$-jet events collected with the ATLAS experiment in 7 TeV $pp$ collisions - IN2P3 - Institut national de physique nucléaire et de physique des particules
Article Dans Une Revue Journal of High Energy Physics Année : 2015

Determination of the top-quark pole mass using $t \bar{t}+1$-jet events collected with the ATLAS experiment in 7 TeV $pp$ collisions

G. Aad (1) , S. Albrand (2) , J. Brown (2) , J. Collot (2) , S. Crépé-Renaudin (2) , P.A. Delsart (2) , C. Gabaldon (2) , M.H. Genest (2) , J.Y. Hostachy (2) , F. Ledroit-Guillon (2) , A. Lleres (2) , A. Lucotte (2) , F. Malek (2) , C. Monini (2) , J. Stark , B. Trocmé (2) , M. Wu (2) , G. Rahal (3) , D. Boumediene (4) , Emmanuel Busato (4) , D. Calvet (4) , S. Calvet (4) , J. Donini (4) , E. Dubreuil (4) , N. Ghodbane (4) , G. Gilles (4) , Ph. Gris (4) , H. Liao (4) , R. Madar (4) , D. Pallin (4) , S.M. Romano Saez (4) , C. Santoni (4) , D. Simon (4) , Timothée Theveneaux-Pelzer (4) , F. Vazeille (4) , Z. Barnovska (5) , N. Berger (5) , M. Delmastro (5) , L. Di Ciaccio (5) , T.K.O. Doan (5) , S. Elles (5) , T. Hryn’ova (5) , S. Jézéquel (5) , I. Koletsou (5) , R. Lafaye (5) , J. Leveque (5) , N. Massol (5) , G. Sauvage (5) , E. Sauvan (5) , O. Simard (5) , T. Todorov (5) , I. Wingerter-Seez (5) , M.K. Ayoub (6) , A. Bassalat (6) , C. Becot (6) , S. Binet (6) , C. Bourdarios (6) , J.B. de Vivie de Regie (6) , D. Delgove (6) , L. Duflot (6) , M. Escalier (6) , L. Fayard (6) , D. Fournier (6) , E.L. Gkougkousis (6) , J.-F. Grivaz (6) , T. Guillemin (6) , F. Hariri (6) , S. Henrot-Versillé (6) , J. Hrivnac (6) , L. Iconomidou-Fayard (6) , M. Kado (6) , A. Lounis (6) , N. Makovec (6) , N. Morange (6) , C. Nellist (6) , L. Poggioli (6) , P. Puzo (6) , A. Renaud (6) , D. Rousseau (6) , G. Rybkin (6) , A.C. Schaffer (6) , E. Scifo (6) , L. Serin (6) , S. Simion (6) , R. Tanaka (6) , H.L. Tran (6) , D. Zerwas (6) , Zhongkai Zhang (6) , Y. Zhao (6) , L. Alio (1) , M. Barbero (1) , Y. Coadou (1) , C. Diaconu (1) , Sara Diglio (1) , F. Djama (1) , O. Duccu (1, 7) , L. Feligioni (1) , J. Gao (1) , G.D. Hallewell (1) , F. Hubaut (1) , S.J. Kahn (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , B. Li (1) , J. Liu (1) , K. Liu (1) , D. Madaffari (1) , K. Mochizuki (1) , E. Monnier (1) , S. Muanza (1) , Y. Nagai (1) , E. Nagy (1) , P. Pralavorio (1) , A. Rozanov (1) , T. Serre (1) , M. Talby (1) , R.E. Ticse Torres (1) , E. Tiouchichine (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , L. Vacavant (1)
G. Aad
J. Stark
  • Fonction : Auteur
N. Berger
T. Hryn’ova
D. Rousseau
Y. Coadou

Résumé

The normalized differential cross section for top-quark pair production in association with at least one jet is studied as a function of the inverse of the invariant mass of the $t \bar{t}+1$-jet system. This distribution can be used for a precise determination of the top-quark mass since gluon radiation depends on the mass of the quarks. The experimental analysis is based on proton-proton collision data collected by the ATLAS detector at the LHC with a centre-of-mass energy of 7 TeV corresponding to an integrated luminosity of 4.6 fb$^{-1}$. The selected events were identified using the lepton+jets top-quark-pair decay channel, where lepton refers to either an electron or a muon. The observed distribution is compared to a theoretical prediction at next-to-leading-order accuracy in quantum chromodynamics using the pole-mass scheme. With this method, the measured value of the top-quark pole mass, $m_t^{\rm pole}$, is: $m_t^{\rm pole}$ =173.7 $\pm$ 1.5 (stat.) $\pm$ 1.4 (syst.) $^{+ 1.0}_{-0.5}$ (theory) GeV. This result represents the most precise measurement of the top-quark pole mass to date.

Dates et versions

in2p3-01173977 , version 1 (08-07-2015)

Identifiants

Citer

G. Aad, S. Albrand, J. Brown, J. Collot, S. Crépé-Renaudin, et al.. Determination of the top-quark pole mass using $t \bar{t}+1$-jet events collected with the ATLAS experiment in 7 TeV $pp$ collisions. Journal of High Energy Physics, 2015, 10, pp.121. ⟨10.1007/JHEP10(2015)121⟩. ⟨in2p3-01173977⟩
32 Consultations
0 Téléchargements

Altmetric

Partager

More