TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Jaimes Elles, S. J.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Rebollo De Miguel, M.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanderswood, I.
PY  - 2023
DA  - 2023//
TI  - Associated production of prompt J/ψ and Υ mesons in pp collisions at √s=13 TeV
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 093
EP  - 24pp
VL  - 08
IS  - 8
PB  - Springer
KW  - Flavour Physics
KW  - Hadron-Hadron Scattering
KW  - Hard Scattering
KW  - Heavy Quark Production
AB  - The associated production of prompt J/psi and Υ mesons in pp collisions at a centre-of-mass energy of root s = 13T eV is studied using LHCb data, corresponding to an integrated luminosity of 4 fb(-1). The measurement is performed for J/psi (Υ) mesons with a transverse momentum pT < 10 (30) GeV/ c in the rapidity range 2.0 < y < 4.5. In this kinematic range, the cross-section of the associated production of prompt J/psi and Υ(1S) mesons is measured to be 133 +/- 22 +/- 7 +/- 3 pb, with a significance of 7.9 s, and that of prompt J/psi and Υ(2S) mesons to be 76 +/- 21 +/- 4 +/- 7 pb, with a significance of 4.9 sigma. The first uncertainty is statistical, the second systematic, and the third due to uncertainties on the used branching fractions. This is the first observation of the associated production of J/psi and Υ(1S) in proton-proton collisions. Differential cross-sections are measured as functions of variables that are sensitive to kinematic correlations between the J/psi and Υ(1S) mesons. The effective cross-sections of the associated production of prompt J/psi and Υ mesons are obtained and found to be compatible with measurements using other particle productions.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2305.15580
UR  - https://doi.org/10.1007/JHEP08(2023)093
DO  - 10.1007/JHEP08(2023)093
LA  - English
N1  - WOS:001062398200001
ID  - LHCbCollaborationAaij_etal2023
ER  -