Coherent ρ 0 photoproduction in ultra-peripheral Pb-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}}=2.76 $$ TeV
Journal Article
·
· Journal of High Energy Physics (Online)
We report the first measurement at the LHC of coherent photoproduction of ρo mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for ρo production are studied in the π+π- decay channel at mid-rapidity. The production cross section in the rapidity range |y| < 0.5 is found to be dσ/dy = 425 ± 10(stat.)-50+ 42 (sys.) mb. Coherent ρo production is studied with and without requirement of nuclear breakup, and the fractional yields for various breakup scenarios are presented. Lastly, the results are compared with those from lower energies and with model predictions.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE; USDOE National Nuclear Security Administration (NNSA)
- Contributing Organization:
- The ALICE collaboration
- Grant/Contract Number:
- AC05-00OR22725; AC52-07NA27344
- OSTI ID:
- 1341543
- Report Number(s):
- LLNL-JRNL-737099
- Journal Information:
- Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 9 Vol. 2015; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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