Measurement of jet activity produced in top-quark events with an electron, a muon and two $b$-tagged jets in the final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2017

Measurement of jet activity produced in top-quark events with an electron, a muon and two $b$-tagged jets in the final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

M. Aaboud , N. Berger (1) , M. Delmastro (1) , L. Di Ciaccio (1) , S. Elles (1) , K. Grevtsov (1) , T. Guillemin (1) , T. Hryn’ova (1) , S. Jézéquel (1) , I. Koletsou (1) , R. Lafaye (1) , Jérémy Lévêque (1) , P. Mastrandea (1) , E. Sauvan (1) , B.H. Smart (1) , T. Todorov (1) , I. Wingerter-Seez (1) , E. Yatsenko (1) , S. Albrand (2) , S. Berlendis (2) , A. Bethani (2) , C. Camincher (2) , J. Collot (2) , S. Crépé-Renaudin (2) , P.A. Delsart (2) , C. Gabaldon (2) , M.H. Genest (2) , P.O.J. Gradin (2) , J.Y. Hostachy (2) , F. Ledroit-Guillon (2) , A. Lleres (2) , A. Lucotte (2) , F. Malek (2) , E. Petit (2) , J. Stark (2) , B. Trocmé (2) , M. Wu (2) , G. Rahal (3) , M.K. Ayoub (4) , A. Bassalat (4) , S. Binet , C. Becot , C. Bourdarios (4) , J.B. de Vivie De Regie (4) , D. Delgove (4) , L. Duflot (4) , M. Escalier (4) , L. Fayard (4) , D. Fournier (4) , E.L. Gkougkousis (4) , J.-F. Grivaz (4) , F. Hariri (4) , S. Henrot-Versille (4) , J. Hrivnac (4) , L. Iconomidou-Fayard (4) , M. Kado (4) , A. Lounis (4) , N. Makovec (4) , N. Morange (4) , C. Nellist (4) , P. Petroff (4) , L. Poggioli (4) , P. Puzo (4) , A. Renaud , G. Rybkin (4) , D. Rousseau (4) , A.C. Schaffer (4) , L. Serin (4) , E. Scifo (4) , S. Simion (4) , R. Tanaka (4) , D. Zerwas (4) , Zhongkai Zhang (4) , Y. Zhao (4) , G. Aad (5) , M. Alstaty (5) , M. Barbero (5) , A. Calandri (5) , T.P. Calvet (5) , Y. Coadou (5) , C. Diaconu (5) , F. Djama (5) , V. Ellajosyula (5) , L. Feligioni (5) , A. Hadef (5) , G.D. Hallewell (5) , F. Hubaut (5) , S.J. Kahn (5) , E. B. F. G. Knoops (5) , E. Le Guirriec (5) , K. Liu (5) , D. Madaffari (5) , E. Monnier (5) , S. Muanza (5) , E. Nagy (5) , P. Pralavorio (5) , Y. Rodina (5) , A. Rozanov (5) , M. Talby (5) , T. Theveneaux-Pelzer (5) , R.E. Ticse Torres (5) , S. Tisserant (5) , J. Toth (6, 5) , F. Touchard (5) , L. Vacavant (5) , Chen Wang (7, 5) , R. Wolff (5) , D. Boumediene (8) , E. Busato (8) , D. Calvet (8) , S. Calvet (8) , A.R. Chomont (8) , J. Donini (8) , S. Ganguly (8) , Ph. Gris (8) , R. Madar (8) , D. Pallin (8) , S.M. Romano Saez (8) , C. Santoni (8) , D. Simon (8) , F. Vazeille (8)
M. Aaboud
  • Fonction : Auteur
N. Berger
T. Hryn’ova
S. Binet
  • Fonction : Auteur
C. Becot
  • Fonction : Auteur
A. Renaud
  • Fonction : Auteur
D. Rousseau
G. Aad
Y. Coadou
S. Calvet

Résumé

Measurements of jet activity in top-quark pair events produced in proton--proton collisions are presented, using 3.2 fb$^{-1}$ of $pp$ collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. Events are chosen by requiring an opposite-charge $e\mu$ pair and two $b$-tagged jets in the final state. The normalised differential cross-sections of top-quark pair production are presented as functions of additional-jet multiplicity and transverse momentum, $p_{\mathrm T}$. The fraction of signal events that do not contain additional jet activity in a given rapidity region, the gap fraction, is measured as a function of the $p_{\mathrm T}$ threshold for additional jets, and is also presented for different invariant mass regions of the $e\mu b\bar{b}$ system. All measurements are corrected for detector effects and presented as particle-level distributions compared to predictions with different theoretical approaches for QCD radiation. While the kinematics of the jets from top-quark decays are described well, the generators show differing levels of agreement with the measurements of observables that depend on the production of additional jets.

Dates et versions

in2p3-01390854 , version 1 (02-11-2016)

Identifiants

Citer

M. Aaboud, N. Berger, M. Delmastro, L. Di Ciaccio, S. Elles, et al.. Measurement of jet activity produced in top-quark events with an electron, a muon and two $b$-tagged jets in the final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 2017, 77, pp.220. ⟨10.1140/epjc/s10052-017-4766-0⟩. ⟨in2p3-01390854⟩
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