Coherent ψ(2S) photo-production in ultra-peripheral Pb-Pb collisions at √sNN=2.76 TeV
ALICE Collaboration. (2015). Coherent ψ(2S) photo-production in ultra-peripheral Pb-Pb collisions at √sNN=2.76 TeV. Physics Letters B, 751, 358-370. https://doi.org/10.1016/j.physletb.2015.10.040
Published in
Physics Letters BAuthors
Date
2015Copyright
© 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
We have performed the first measurement of the coherent ψ(2S) photo-production cross section in ultraperipheral
Pb–Pb collisions at the LHC. This charmonium excited state is reconstructed via the ψ(2S) →
l
+l
− and ψ(2S) → J/ψπ+π− decays, where the J/ψ decays into two leptons. The analysis is based on an
event sample corresponding to an integrated luminosity of about 22 μb−1. The cross section for coherent
ψ(2S) production in the rapidity interval −0.9 < y < 0.9 is dσcoh
ψ(2S)/dy = 0.83±0.19
stat+syst
mb. The
ψ(2S) to J/ψ coherent cross section ratio is 0.34+0.08
−0.07(stat + syst). The obtained results are compared to
predictions from theoretical models.
Publisher
Elsevier B.V.ISSN Search the Publication Forum
0370-2693Keywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/25306713
Metadata
Show full item recordCollections
License
Except where otherwise noted, this item's license is described as © 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
Related items
Showing items with similar title or keywords.
-
Energy dependence of exclusive J/ψ photoproduction off protons in ultra-peripheral p–Pb collisions at √sNN = 5.02 TeV
ALICE Collaboration (Springer Berlin Heidelberg, 2019)The ALICE Collaboration has measured the energy dependence of exclusive photoproduction of J/ψJ/ψ vector mesons off proton targets in ultra–peripheral p–Pb collisions at a centre-of-mass energy per nucleon pair ... -
Coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at √sNN = 5.02 TeV
ALICE collaboration (Springer, 2020)Cross sections for the coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at √sNN = 5.02 TeV are reported. The measurements, which rely on the π+π− decay channel, are presented in three regions ... -
First measurement of coherent ρ0 photoproduction in ultra-peripheral Xe–Xe collisions at √sNN = 5.44 TeV
ALICE Collaboration (Elsevier BV, 2021)The first measurement of the coherent photoproduction of ρ0 vector mesons in ultra-peripheral Xe–Xe collisions at sNN=5.44 TeV is presented. This result, together with previous HERA γp data and γ–Pb measurements from ALICE, ... -
Coherent J/ψ and ψ′ photoproduction at midrapidity in ultra-peripheral Pb–Pb collisions at √sNN = 5.02 TeV
ALICE Collaboration (Springer, 2021)The coherent photoproduction of J/ψ and ψ′ mesons was measured in ultra-peripheral Pb–Pb collisions at a center-of-mass energy √sNN = 5.02 TeV with the ALICE detector. Charmonia are detected in the central rapidity region ... -
Coherent J/ψ photoproduction at forward rapidity in ultra-peripheral Pb–Pb collisions at √sNN = 5.02 TeV
ALICE Collaboration (Elsevier, 2019)The ALICE collaboration performed the first rapidity-differential measurement of coherent J/ψ photoproduction in ultra-peripheral Pb–Pb collisions at a center-of-mass energy √sNN=5.02 TeV. The J/ψ is detected via its dimuon ...