The differential cross-section as a function of rapidity has been measured for the exclusive production of J/ψ ; ψ(2S) mesons in proton-proton collisions at TeV, using data collected by the LHCb experiment, corresponding to an integrated luminosity of 930 pb-1. The cross-sections times branching fractions to two muons having pseudorapidities between 2.0 ; 4.5 are measured to be σpp→J/ψ→μ+ μ? (2.0 < ημ± < 4.5) = 291 ± 7 ± 19 pb, σpp→ψ(2S)→μ+ μ? (2.0 < ημ± < 4.5) = 6.5 ± 0.9 ± 0.4 pb, where the first uncertainty is statistical ; the second is systematic. The measurements agree with next-to-leading order QCD predictions as well as with models that include saturation effects. © 2014 IOP Publishing Ltd.

Updated measurements of exclusive J/ψ ; ψ(2S) production cross-sections in pp collisions at √s = 7 TeV

PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2014-01-01

Abstract

The differential cross-section as a function of rapidity has been measured for the exclusive production of J/ψ ; ψ(2S) mesons in proton-proton collisions at TeV, using data collected by the LHCb experiment, corresponding to an integrated luminosity of 930 pb-1. The cross-sections times branching fractions to two muons having pseudorapidities between 2.0 ; 4.5 are measured to be σpp→J/ψ→μ+ μ? (2.0 < ημ± < 4.5) = 291 ± 7 ± 19 pb, σpp→ψ(2S)→μ+ μ? (2.0 < ημ± < 4.5) = 6.5 ± 0.9 ± 0.4 pb, where the first uncertainty is statistical ; the second is systematic. The measurements agree with next-to-leading order QCD predictions as well as with models that include saturation effects. © 2014 IOP Publishing Ltd.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/179712
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 152
  • ???jsp.display-item.citation.isi??? 110
social impact