We have performed the first measurement of the coherent photo-production cross section in ultra-peripheral Pbsingle bondPb collisions at the LHC. This charmonium excited state is reconstructed via the and decays, where the decays into two leptons. The analysis is based on an event sample corresponding to an integrated luminosity of about . The cross section for coherent production in the rapidity interval is . The to coherent cross section ratio is . The obtained results are compared to predictions from theoretical models.

{Coherent $\psi$(2S) photo-production in ultra-peripheral Pb Pb collisions at $\sqrt{s}_{\rm NN}$ = 2.76 TeV} / The ALICE collaboration, ., Adam, J., Adamová, D., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S.U., Aiola, S., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., Alfaro Molina, R., Alici, A., Alkin, A., Almaraz, J.R.M., Alme, J., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 751:(2015), pp. 358-370. [10.1016/j.physletb.2015.10.040]

{Coherent $\psi$(2S) photo-production in ultra-peripheral Pb Pb collisions at $\sqrt{s}_{\rm NN}$ = 2.76 TeV}

L. Cunqueiro;
2015

Abstract

We have performed the first measurement of the coherent photo-production cross section in ultra-peripheral Pbsingle bondPb collisions at the LHC. This charmonium excited state is reconstructed via the and decays, where the decays into two leptons. The analysis is based on an event sample corresponding to an integrated luminosity of about . The cross section for coherent production in the rapidity interval is . The to coherent cross section ratio is . The obtained results are compared to predictions from theoretical models.
2015
heavy ion experiments, quarkonia production, ALICE Collaboration
01 Pubblicazione su rivista::01a Articolo in rivista
{Coherent $\psi$(2S) photo-production in ultra-peripheral Pb Pb collisions at $\sqrt{s}_{\rm NN}$ = 2.76 TeV} / The ALICE collaboration, ., Adam, J., Adamová, D., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S.U., Aiola, S., Akindinov, A., Alam, S.N., Aleksandrov, D., Alessandro, B., Alexandre, D., Alfaro Molina, R., Alici, A., Alkin, A., Almaraz, J.R.M., Alme, J., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 751:(2015), pp. 358-370. [10.1016/j.physletb.2015.10.040]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1663411
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