The double-differential cross sections of promptly produced J/ψ and ψ(2S) mesons are measured in pp collisions at s√=7  TeV, as a function of transverse momentum pT and absolute rapidity |y|. The analysis uses J/ψ and ψ(2S) dimuon samples collected by the CMS experiment, corresponding to integrated luminosities of 4.55 and 4.90  fb−1, respectively. The results are based on a two-dimensional analysis of the dimuon invariant mass and decay length, and extend to pT=120 and 100 GeV for the J/ψ and ψ(2S), respectively, when integrated over the interval |y|<1.2. The ratio of the ψ(2S) to J/ψ cross sections is also reported for |y|<1.2, over the range 10<pT<100  GeV. These are the highest pT values for which the cross sections and ratio have been measured.

Measurement of J/psi and Psi(2S) prompt double-differential cross sections in pp collisions at sqrt(s) = 7 TeV

CANDELISE, VIERI;DELLA RICCA, GIUSEPPE;LA LICATA, CHIARA;MARONE, MATTEO;SCHIZZI, ANDREA;UMER, TOMO;
2015

Abstract

The double-differential cross sections of promptly produced J/ψ and ψ(2S) mesons are measured in pp collisions at s√=7  TeV, as a function of transverse momentum pT and absolute rapidity |y|. The analysis uses J/ψ and ψ(2S) dimuon samples collected by the CMS experiment, corresponding to integrated luminosities of 4.55 and 4.90  fb−1, respectively. The results are based on a two-dimensional analysis of the dimuon invariant mass and decay length, and extend to pT=120 and 100 GeV for the J/ψ and ψ(2S), respectively, when integrated over the interval |y|<1.2. The ratio of the ψ(2S) to J/ψ cross sections is also reported for |y|<1.2, over the range 10
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.191802
File in questo prodotto:
File Dimensione Formato  
Measurement of J-psi and psi(2S) prompt double-differential cross sections in pp collisions.pdf

accesso aperto

Descrizione: file pdf
Tipologia: Documento in Versione Editoriale
Licenza: Digital Rights Management non definito
Dimensione 462.86 kB
Formato Adobe PDF
462.86 kB Adobe PDF Visualizza/Apri

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: http://hdl.handle.net/11368/2840401
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 64
  • ???jsp.display-item.citation.isi??? 52
social impact