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

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http://hdl.handle.net/10138/322038

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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

Titel: Coherent photoproduction of rho(0) vector mesons in ultra-peripheral Pb-Pb collisions at root s(NN)=5.02 TeV
Författare: 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.
Medarbetare: University of Helsinki, University of Jyväskylä
University of Helsinki, Czech Academy of Sciences
University of Helsinki, University of Tsukuba
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Bergen
Datum: 2020-06-04
Språk: eng
Sidantal: 28
Tillhör serie: Journal of High Energy Physics
ISSN: 1029-8479
Permanenta länken (URI): http://hdl.handle.net/10138/322038
Abstrakt: 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
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