Coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at √sNN=5.02 TeV
Cross sections for the coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at sNN$$ \sqrt{{\mathrm{s}}_{\mathrm{NN}}} $$= 5.02 TeV are reported. The measurements, which rely on the π+π− decay channel, are presented in three regions of rapidity covering the range |y| <...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
04 June 2020
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| In: |
Journal of high energy physics
Year: 2020, Heft: 6 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP06(2020)035 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP06(2020)035 |
| Verfasserangaben: | the ALICE collaboration |
| Zusammenfassung: | Cross sections for the coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at sNN$$ \sqrt{{\mathrm{s}}_{\mathrm{NN}}} $$= 5.02 TeV are reported. The measurements, which rely on the π+π− decay channel, are presented in three regions of rapidity covering the range |y| < 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/c2 and a width of about 140 MeV/c2 is reported and compared with similar observations from other experiments. |
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| Beschreibung: | The ALICE collaboration: S. Acharya, V. Anguelov, M. Arslandok, M.C. Danisch, V.J.G. Feuillard, P. Glässel, J. Kim, M. Kim, M.K. Köhler, L. Leardini, J. Lopez, N.A. Martin, Y.C. Pachmayer, K. Reygers, A. Schmah, M.O. Schmidt, J. Stache, B. Windelband, A. Yüncü [und viele weitere] Im Titel ist die erste "0" bei p0 hochgestellt, der Ausdruck "sNN" steht unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt Gesehen am 25.11.2020 |
| Beschreibung: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP06(2020)035 |