We report on the inclusive production cross sec- tions of J/ψ , ψ (2S), Υ (1S), Υ (2S) and Υ (3S), measured at forward rapidity with the ALICE detector in pp colli- sions at a center-of-mass energy √s = 8 TeV. The analy- sis is based on data collected at the LHC and corresponds to an integrated luminosity of 1.23 pb−1. Quarkonia are reconstructed in the dimuon-decay channel. The differen- tial production cross sections are measured as a function of the transverse momentum pT and rapidity y, over the pT ranges0< pT <20GeV/cforJ/ψ,0< pT <12GeV/c for all other resonances, and for 2.5 < y < 4. The cross sections, integrated over pT and y, and assuming unpo- larized quarkonia, are σJ/ψ = 8.98 ± 0.04 ± 0.82 μb, σψ(2S) =1.23±0.08±0.22μb,σΥ(1S) =71±6±7nb, σΥ(2S) =26±5±4nbandσΥ(3S) =9±4±1nb, where the first uncertainty is statistical and the second one is systematic. These values agree, within at most 1.4σ , with measurements performed by the LHCb collaboration in the same rapidity range.

Inclusive quarkonium production at forward rapidity in pp collisions at √s = 8 TeV TeV

CAMERINI, Paolo;FRAGIACOMO, ENRICO;LEA, RAMONA;LUPARELLO, GRAZIA;MARGAGLIOTTI, GIACOMO;PIANO, STEFANO;RUI, RINALDO;ŠULJIĆ, MILJENKO;;
2016

Abstract

We report on the inclusive production cross sec- tions of J/ψ , ψ (2S), Υ (1S), Υ (2S) and Υ (3S), measured at forward rapidity with the ALICE detector in pp colli- sions at a center-of-mass energy √s = 8 TeV. The analy- sis is based on data collected at the LHC and corresponds to an integrated luminosity of 1.23 pb−1. Quarkonia are reconstructed in the dimuon-decay channel. The differen- tial production cross sections are measured as a function of the transverse momentum pT and rapidity y, over the pT ranges0< pT <20GeV/cforJ/ψ,0< pT <12GeV/c for all other resonances, and for 2.5 < y < 4. The cross sections, integrated over pT and y, and assuming unpo- larized quarkonia, are σJ/ψ = 8.98 ± 0.04 ± 0.82 μb, σψ(2S) =1.23±0.08±0.22μb,σΥ(1S) =71±6±7nb, σΥ(2S) =26±5±4nbandσΥ(3S) =9±4±1nb, where the first uncertainty is statistical and the second one is systematic. These values agree, within at most 1.4σ , with measurements performed by the LHCb collaboration in the same rapidity range.
http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-016-3987-y
File in questo prodotto:
File Dimensione Formato  
art_10.1140_epjc_s10052-016-3987-y.pdf

accesso aperto

Tipologia: Documento in Versione Editoriale
Licenza: Creative commons
Dimensione 778.43 kB
Formato Adobe PDF
778.43 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/11368/2878821
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 33
  • ???jsp.display-item.citation.isi??? 30
social impact