Details

Autor(en) / Beteiligte

• Adamová, D.
• Ahmad, S.
• Ahn, S. U.
• Akindinov, A.
• Andrei, C.
• Antinori, F.
• Bartels, C.
• Basu, S.
• Batyunya, B.
• Becht, P.
• Beole, S.
• Berdnikova, A.
• Biernat, J.
• Bize, N.
• Bluhme, N.
• Boi, S.
• Bombara, M.
• Borissov, A.
• Cheshkov, C.
• Cho, S.
• Chujo, T.
• Ding, Y.
• Dubinski, J. M.
• Elia, D.
• Evdokimov, S.
• Fantoni, A.
• Fokin, I.
• Fragiacomo, E.
• Gargiulo, C.
• Gasik, P.
• Germain, M.
• Giubilato, P.
• Goh, D. J. Q.
• Gorgon, M.
• Guardiano, G. G.
• Haider, F. U.
• Hellbär, E.
• Hemmer, M.
• Herrera Corral, G.
• Hetland, K. F.
• Horst, M.
• Innocenti, G. M.
• Ji, S.
• Jonas, F.
• Kaewjai, J.
• Kalinak, P.
• Karavicheva, T.
• Keijdener, D. L. D.
• Kharlov, Y.
• Kim, D. J.
• Kim, E. J.
• Krizek, F.
• Kumar, D.
• Kweon, M. J.
• Lamanna, M.
• Lehrbach, J.
• Lim, S. H.
• Liu, D. H.
• Lofnes, I. M.
• Mandaglio, G.
• Manko, V.
• Martinengo, P.
• Masciocchi, S.
• Mikhaylov, K.
• Mohanty, B.
• Mulligan, J. D.
• Nania, R.
• Nikulin, S.
• Nystrand, J.
• Padhan, S.
• Planinic, M.
• Pozos, I. Y.
• Ragoni, S.
• Reckziegel, C.
• Reme-Ness, H. A.
• Rohr, D.
• Röhrich, D.
• Rokita, P. S.
• Romanenko, G.
• Saarimaki, O. A. M.
• Sadovsky, S.
• Sajdakova, K.
• Schmidt, C.
• Shangaraev, A.
• Simeonov, R.
• Singh, R.
• Solheim, E. H.
• Staa, J.
• Steffanic, P. J.
• Swain, S.
• Terrevoli, C.
• Thomas, D.
• Toppi, M.
• Tripathy, S.
• Tumkin, A.
• Vino, G.
• Willems, G. A.
• Winn, M.
• Xu, R.
• Yin, Z.

Titel

Energy dependence of coherent photonuclear production of J/ψ mesons in ultra-peripheral Pb-Pb collisions at $$ \sqrt{{\textrm{s}}_{\textrm{NN}}} $$ = 5.02 TeV

Ist Teil von

• The journal of high energy physics, 2023-10, Vol.2023 (10), Article 119

Ort / Verlag

United States: Springer Nature

Erscheinungsjahr

2023

Quelle

Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals

Beschreibungen/Notizen

• A bstract The cross section for coherent photonuclear production of J/ ψ is presented as a function of the electromagnetic dissociation (EMD) of Pb. The measurement is performed with the ALICE detector in ultra-peripheral Pb-Pb collisions at a centre-of-mass energy per nucleon pair of $$ \sqrt{{\textrm{s}}_{\textrm{NN}}} $$ s NN = 5.02 TeV. Cross sections are presented in five different J/ ψ rapidity ranges within | y | < 4, with the J/ ψ reconstructed via its dilepton decay channels. In some events the J/ ψ is not accompanied by EMD, while other events do produce neutrons from EMD at beam rapidities either in one or the other beam direction, or in both. The cross sections in a given rapidity range and for different configurations of neutrons from EMD allow for the extraction of the energy dependence of this process in the range 17 < W γ Pb , n < 920 GeV, where W γ Pb , n is the centre-of-mass energy per nucleon of the γ Pb system. This range corresponds to a Bjorken- x interval spanning about three orders of magnitude: 1.1 × 10 − 5 < x < 3.3 × 10 − 2 . In addition to the ultra-peripheral and photonuclear cross sections, the nuclear suppression factor is obtained. These measurements point to a strong depletion of the gluon distribution in Pb nuclei over a broad, previously unexplored, energy range. These results, together with previous ALICE measurements, provide unprecedented information to probe quantum chromodynamics at high energies.