Rapidity and transverse momentum dependence of inclusive J/ψ production in pp collisions at √ s = 7 TeV

0374458 - FZÚ 2013 RIV NL eng J - Článek v odborném periodiku
Aamodt, K. - Quintana, A.A. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Kushpil, Svetlana - Kushpil, Vasilij - Mareš, Jiří A. - Šumbera, Michal - Tlustý, D. - Wagner, V. - Závada, Petr … celkem 926 autorů
Rapidity and transverse momentum dependence of inclusive J/ψ production in pp collisions at √ s = 7 TeV.
Physics Letters. B. Roč. 704, č. 5 (2011), s. 442-455. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LA08015
Výzkumný záměr: CEZ:AV0Z10100502; CEZ:AV0Z10480505
Klíčová slova: CERN * LHC * ALICE * pp collisions
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 3.955, rok: 2011

The ALICE experiment at the LHC has studied inclusive J/ψ production at central and forward rapidities in pp collisions at √s = 7 TeV. In this Letter, we report on the first results obtained detecting the J/ψthrough the dilepton decay into e+e− and μ+μ− pairs in the rapidity ranges |y| < 0.9 and 2.5 < y < 4, respectively, and with acceptance down to zero pT. In the dielectron channel the analysis was carried out on a data sample corresponding to an integrated luminosity Lint = 5.6 nb−1 and the number of signal events is NJ/ψ = 352 ± 32 (stat.) ± 28 (syst.); the corresponding figures in the dimuon channel are Lint = 15.6 nb−1 and NJ/ψ = 1924 ± 77 (stat.) ± 144 (syst.).The measured production cross sections are σJ/ψ (|y| < 0.9) = 10.7 ± 1.0 (stat.) ± 1.6 (syst.)+1.6−2.3 (syst.pol.) μb and σJ/ψ (2.5 < y < 4) = 6.31 ± 0.25 (stat.)±0.76 (syst.)+0.95−1.96 (syst.pol.) μb. The differential cross sections, in transverse momentum and rapidity, of the J/ψ were also measured.
Trvalý link: http://hdl.handle.net/11104/0207376