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Measurement of prompt Psi(2S) to J/psi yield ratios in PbPb and pp collisions at sqrt(s_NN) = 2.76 TeV

BELFORTE S.
•
CANDELISE, VIERI
•
CASARSA M.
altro
ZANETTI A.
2014
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
The ratio between the prompt ψ(2S) and J/ψ yields, reconstructed via their decays into μ+μ−, is measured in Pb-Pb and p-p collisions at sNN−−−−√=2.76 TeV. The analysis is based on Pb-Pb and p-p data samples collected by CMS at the Large Hadron Collider, corresponding to integrated luminosities of 150 μb−1 and 5.4 pb−1, respectively. The double ratio of measured yields (Nψ(2S)/NJ/ψ)Pb−Pb/(Nψ(2S)/NJ/ψ)p−p is computed in three Pb-Pb collision centrality bins and two kinematic ranges: one at midrapidity, |y|<1.6, covering the transverse momentum range 6.5<pT<30 GeV/c, and the other at forward rapidity, 1.6<|y|<2.4, extending to lower pT values, 3<pT<30 GeV/c. The centrality-integrated double ratio changes from 0.45±0.13(stat)±0.07(syst) in the first range to 1.67±0.34(stat)±0.27(syst) in the second. This difference is most pronounced in the most central collisions.
DOI
10.1103/PhysRevLett.113.262301
WOS
WOS:000350218000011
Archivio
http://hdl.handle.net/11368/2810723
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84930964514
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.262301
Diritti
open access
FVG url
https://arts.units.it/bitstream/11368/2810723/2/PhysRevLett.113.262301.pdf
Soggetti
  • PARTICLE PHYSICS

  • LARGE HADRON COLLIDER...

  • CMS

Scopus© citazioni
52
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
46
Data di acquisizione
Mar 24, 2024
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