Cross sections for the coherent photoproduction of 0 vector mesons in ultraperipheral Pb-Pb collisions at p sNN = 5:02TeV are reported. The measurements, which rely on the pi+pi- decay channel, are presented in three regions of rapidity covering the range jyj < 0:8. For each rapidity interval, cross sections are shown for dierent nuclear breakup classes dened according to the presence of neutrons measured in the zero-degree calorimeters. The results are compared with predictions based on dierent models of nuclear shadowing. Finally, the observation of a coherently produced resonance-like structure with a mass around 1.7 GeV/c2 and a width of about 140 MeV/c2 is reported and compared with similar observations from other experiments.

Coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at $$ sqrt{{mathrm{s}}_{mathrm{NN}}} $$ = 5.02 TeV

Colella, D.;Di Bari, D.
Membro del Collaboration Group
;
Mazzilli, M.;Volpe, G.
Membro del Collaboration Group
;
2020-01-01

Abstract

Cross sections for the coherent photoproduction of 0 vector mesons in ultraperipheral Pb-Pb collisions at p sNN = 5:02TeV are reported. The measurements, which rely on the pi+pi- decay channel, are presented in three regions of rapidity covering the range jyj < 0:8. For each rapidity interval, cross sections are shown for dierent nuclear breakup classes dened according to the presence of neutrons measured in the zero-degree calorimeters. The results are compared with predictions based on dierent models of nuclear shadowing. Finally, the observation of a coherently produced resonance-like structure with a mass around 1.7 GeV/c2 and a width of about 140 MeV/c2 is reported and compared with similar observations from other experiments.
File in questo prodotto:
File Dimensione Formato  
Acharya2020_Article_CoherentPhotoproductionOfΡ0Vec.pdf

accesso aperto

Tipologia: Documento in Versione Editoriale
Licenza: Creative commons
Dimensione 828.97 kB
Formato Adobe PDF
828.97 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: https://hdl.handle.net/11586/301291
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 26
  • ???jsp.display-item.citation.isi??? 31
social impact