The first measurement of the cross section for incoherent photonuclear production of J/Psi. vector mesons as a function of the Mandelstam t variable is presented. The measurement was carried out with the ALICE detector at midrapidity,vertical bar t vertical bar < 0.8, using ultraperipheral collisions of Pb nuclei at a center-of-mass energy per nucleon pair of root s NN 5.02 TeV. This rapidity interval corresponds to a Bjorken-x range o0.3-1.4 x 10(-3). Cross sections are given in five jtj intervals in the range 0.04 < vertical bar t vertical bar < 1 GeV2 and compared to the predictions by different models. Models that ignore quantum fluctuations of the gluon density in the colliding hadron predict a jtj dependence of the cross section much steeper than in data. The inclusion of such fluctuations in the same models provides a better description of the data.

Acharya, S., Adamová, D., Adler, A., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2024). First Measurement of the |t| Dependence of Incoherent J/Psi Photonuclear Production. PHYSICAL REVIEW LETTERS, 132(16), 1-14 [10.1103/physrevlett.132.162302].

First Measurement of the |t| Dependence of Incoherent J/Psi Photonuclear Production

Agrawal, N.;Alici, A.;Arcelli, S.;Bellini, F.;Colocci, M.;Ercolessi, F.;Jacazio, N.;Malfattore, G.;Romanenko, G.;Rubini, N.;Scioli, G.;Strazzi, S.;
2024

Abstract

The first measurement of the cross section for incoherent photonuclear production of J/Psi. vector mesons as a function of the Mandelstam t variable is presented. The measurement was carried out with the ALICE detector at midrapidity,vertical bar t vertical bar < 0.8, using ultraperipheral collisions of Pb nuclei at a center-of-mass energy per nucleon pair of root s NN 5.02 TeV. This rapidity interval corresponds to a Bjorken-x range o0.3-1.4 x 10(-3). Cross sections are given in five jtj intervals in the range 0.04 < vertical bar t vertical bar < 1 GeV2 and compared to the predictions by different models. Models that ignore quantum fluctuations of the gluon density in the colliding hadron predict a jtj dependence of the cross section much steeper than in data. The inclusion of such fluctuations in the same models provides a better description of the data.
2024
Acharya, S., Adamová, D., Adler, A., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2024). First Measurement of the |t| Dependence of Incoherent J/Psi Photonuclear Production. PHYSICAL REVIEW LETTERS, 132(16), 1-14 [10.1103/physrevlett.132.162302].
Acharya, S.; Adamová, D.; Adler, A.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U.; Ahuja, I.; Akindinov, A.; Al-T...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/995401
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