We report the first measurement at the LHC of coherent photoproduction of rho0 mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for rho0 production are studied in the pi+pi− decay channel at mid-rapidity. The production cross section in the rapidity range |y| < 0.5 is found to be dsigma/dy = 425 ± 10 (stat.) +42−50 (sys.) mb. Coherent rho0 production is studied with and without requirement of nuclear breakup, and the fractional yields for various breakup scenarios are presented. The results are compared with those from lower energies and with model predictions.

Adam, J., Adamová, D., Aggarwal, M., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2015). Coherent ρ0 photoproduction in ultra-peripheral Pb-Pb collisions at √sNN = 2.76 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2015(9), 1-27 [10.1007/JHEP09(2015)095].

Coherent ρ0 photoproduction in ultra-peripheral Pb-Pb collisions at √sNN = 2.76 TeV

Alici, A.;ARCELLI, SILVIA;BASILE, MAURIZIO;BELLINI, FRANCESCA;CIFARELLI, LUISA;COLOCCI, MANUEL;GUERZONI, BARBARA;SCIOLI, GILDA;
2015

Abstract

We report the first measurement at the LHC of coherent photoproduction of rho0 mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for rho0 production are studied in the pi+pi− decay channel at mid-rapidity. The production cross section in the rapidity range |y| < 0.5 is found to be dsigma/dy = 425 ± 10 (stat.) +42−50 (sys.) mb. Coherent rho0 production is studied with and without requirement of nuclear breakup, and the fractional yields for various breakup scenarios are presented. The results are compared with those from lower energies and with model predictions.
2015
Adam, J., Adamová, D., Aggarwal, M., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2015). Coherent ρ0 photoproduction in ultra-peripheral Pb-Pb collisions at √sNN = 2.76 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2015(9), 1-27 [10.1007/JHEP09(2015)095].
Adam, J.; Adamová, D.; Aggarwal, M.M.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahn, S.U.; Aimo, I.; Aiola, S.; Ajaz, M.; Akindinov...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/540817
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