We report the first measurement at the LHC of coherent photoproduction of rho(0) mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for rho(0) production are studied in the pi(+)pi(-) decay channel at mid-rapidity. The production cross section in the rapidity range vertical bar y vertical bar < 0.5 is found to be d sigma/dy = 425 +/- 10 (stat.) (+42)(-50) (sys.) mb. Coherent rho(0) 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.

Coherent rho(0) photoproduction in ultra-peripheral Pb-Pb collisions at root s(NN)=2.76 TeV / Adam, J., Adamova, D., Aggarwal, M.M., Rinella, G.A., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S.U., Aimo, I., Aiola, S., Ajaz, M., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., Molina, R.A., Alici, A., Alkin, A., Alme, J., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - STAMPA. - 9(2015). [10.1007/JHEP09(2015)095]

Coherent rho(0) photoproduction in ultra-peripheral Pb-Pb collisions at root s(NN)=2.76 TeV

Cunqueiro, L.;MEDDI, Franco;
2015

Abstract

We report the first measurement at the LHC of coherent photoproduction of rho(0) mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for rho(0) production are studied in the pi(+)pi(-) decay channel at mid-rapidity. The production cross section in the rapidity range vertical bar y vertical bar < 0.5 is found to be d sigma/dy = 425 +/- 10 (stat.) (+42)(-50) (sys.) mb. Coherent rho(0) 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
01 Pubblicazione su rivista::01a Articolo in rivista
Coherent rho(0) photoproduction in ultra-peripheral Pb-Pb collisions at root s(NN)=2.76 TeV / Adam, J., Adamova, D., Aggarwal, M.M., Rinella, G.A., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S.U., Aimo, I., Aiola, S., Ajaz, M., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., Molina, R.A., Alici, A., Alkin, A., Alme, J., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - STAMPA. - 9(2015). [10.1007/JHEP09(2015)095]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/837005
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