Coherent photoproduction of rho(0) vector mesons in ultra-peripheral Pb-Pb collisions at root s(NN)=5.02 TeV

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The ALICE Collaboration , Acharya , S , Kim , D J , Krizek , F , Novitzky , N , Parkkila , J E , Rak , J , Räsänen , S S , Rytkonen , H , Saarimäki , O A M , Slupecki , M , Trzaska , W H & Zhou , Z 2020 , ' Coherent photoproduction of rho(0) vector mesons in ultra-peripheral Pb-Pb collisions at root s(NN)=5.02 TeV ' , Journal of High Energy Physics , no. 6 , 35 . https://doi.org/10.1007/JHEP06(2020)035

Title: Coherent photoproduction of rho(0) vector mesons in ultra-peripheral Pb-Pb collisions at root s(NN)=5.02 TeV
Author: The ALICE collaboration; Acharya, S.; Kim, D. J.; Krizek, F.; Novitzky, N.; Parkkila, J. E.; Rak, J.; Räsänen, S. S.; Rytkonen, H.; Saarimäki, O.A.M.; Slupecki, M.; Trzaska, W. H.; Zhou, Z.
Contributor organization: Helsinki Institute of Physics
Date: 2020-06-04
Language: eng
Number of pages: 28
Belongs to series: Journal of High Energy Physics
ISSN: 1029-8479
DOI: https://doi.org/10.1007/JHEP06(2020)035
URI: http://hdl.handle.net/10138/322038
Abstract: Cross sections for the coherent photoproduction of rho(0) vector mesons in ultra-peripheral Pb-Pb collisions at root s(NN) = 5.02 TeV are reported. The measurements, which rely on the pi(+)pi(-) decay channel, are presented in three regions of rapidity covering the range vertical bar y vertical bar <0.8. For each rapidity interval, cross sections are shown for different nuclear-breakup classes defined according to the presence of neutrons measured in the zero-degree calorimeters. The results are compared with predictions based on different models of nuclear shadowing. Finally, the observation of a coherently produced resonance-like structure with a mass around 1.7 GeV/c(2) and a width of about 140 MeV/c(2) is reported and compared with similar observations from other experiments.
Subject: 114 Physical sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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