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Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2017

Measurement of the prompt $J/\psi$ pair production cross-section in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector

M. Aaboud , G. Aad (1) , M. Alstaty (1) , M. Barbero (1) , A. Calandri (1) , T.P. Calvet (1) , Y. Coadou (1) , C. Diaconu (1) , F. Djama (1) , V. Ellajosyula (1) , L. Feligioni (1) , A. Hadef (1) , G.D. Hallewell (1) , F. Hubaut (1) , S.J. Kahn (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , K. Liu (1) , D. Madaffari (1) , E. Monnier (1) , S. Muanza (1) , E. Nagy (1) , P. Pralavorio (1) , Y. Rodina (1) , A. Rozanov (1) , M. Talby (1) , T. Theveneaux-Pelzer (1) , R.E. Ticse Torres (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , L. Vacavant (1) , Chen Wang (1) , R. Wolff (1) , D. Boumediene (2) , E. Busato (2) , D. Calvet (2) , S. Calvet (2) , A.R. Chomont (2) , J. Donini (2) , S. Ganguly (2) , Ph. Gris (2) , R. Madar (2) , D. Pallin (2) , S.M. Romano Saez (2) , C. Santoni (2) , D. Simon (2) , F. Vazeille (2) , N. Berger (3) , A.M. Burger (3) , M. Delmastro (3) , L. Di Ciaccio (3) , S. Elles (3) , K. Grevtsov (3) , T. Guillemin (3) , T. Hryn’ova (3) , S. Jézéquel (3) , I. Koletsou (3) , R. Lafaye (3) , Jérémy Lévêque (3) , P. Mastrandea (3) , E. Sauvan (3) , B.H. Smart (3) , T. Todorov (3) , I. Wingerter-Seez (3) , E. Yatsenko (3) , S. Albrand (4) , S. Berlendis (4) , A. Bethani (4) , C. Camincher (4) , J. Collot (4) , S. Crépé-Renaudin (4) , P.A. Delsart (4) , C. Gabaldon (4) , M.H. Genest (4) , P.O.J. Gradin (4) , J.Y. Hostachy (4) , F. Ledroit-Guillon (4) , A. Lleres (4) , A. Lucotte (4) , F. Malek (4) , E. Petit (4) , J. Stark (4) , B. Trocmé (4) , M. Wu (4) , G. Rahal (5)
M. Aaboud
  • Fonction : Auteur
G. Aad
Y. Coadou
Chen Wang
  • Fonction : Auteur
  • PersonId : 829307
S. Calvet
N. Berger
T. Hryn’ova

Résumé

The production of two prompt $J/\psi$ mesons, each with transverse momenta $p_{\mathrm{T}}>8.5$ GeV and rapidity $|y| < 2.1$, is studied using a sample of proton-proton collisions at $\sqrt{s} = 8$ TeV, corresponding to an integrated luminosity of 11.4 fb$^{-1}$ collected in 2012 with the ATLAS detector at the LHC. The differential cross-section, assuming unpolarised $J/\psi$ production, is measured as a function of the transverse momentum of the lower-$p_{\mathrm{T}}$ $J/\psi$ meson, di-$J/\psi$ $p_{\mathrm{T}}$ and mass, the difference in rapidity between the two $J/\psi$ mesons, and the azimuthal angle between the two $J/\psi$ mesons. The fraction of prompt pair events due to double parton scattering is determined by studying kinematic correlations between the two $J/\psi$ mesons. The total and double parton scattering cross-sections are compared with predictions. The effective cross-section of double parton scattering is measured to be $\sigma_{\mathrm{eff}} = 6.3 \pm 1.6 \mathrm{(stat)} \pm 1.0 \mathrm{(syst)} \pm 0.1 \mathrm{(BF)} \pm 0.1 \mathrm{(lumi)}$ mb.

Dates et versions

in2p3-01414001 , version 1 (12-12-2016)

Identifiants

Citer

M. Aaboud, G. Aad, M. Alstaty, M. Barbero, A. Calandri, et al.. Measurement of the prompt $J/\psi$ pair production cross-section in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 2017, 77, pp.76. ⟨10.1140/epjc/s10052-017-4644-9⟩. ⟨in2p3-01414001⟩
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