Электронный каталог

Статья

Acharya, S.
First Measurement of the |t| Dependence of Incoherent J/*q Photonuclear Production / S.Acharya, B.Batyunya, C.Ceballos Sanchez, R.A.Diaz, S.Grigoryan, A.Kondratyev, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, G.Romanenko, A.Vodopyanov, [ALICE Collab.] // Physical Review Letters [Electronic resource]. – 2024. – Vol. 132, No. 16. – P. 162302. – URL: https://doi.org/10.1103/PhysRevLett.132.162302. – Bibliogr.: 55.

The first measurement of the cross section for incoherent photonuclear production of J/ψ vector mesons as a function of the Mandelstam |t| variable is presented. The measurement was carried out with the ALICE detector at midrapidity, |y|<0.8, using ultraperipheral collisions of Pb nuclei at a center-of-mass energy per nucleon pair of √sNN=5.02  TeV. This rapidity interval corresponds to a Bjorken-x range (0.3–1.4)×10−3. Cross sections are given in five |t| intervals in the range 0.04<|t|<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 |t| 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.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 343 е2 - Взаимодействие релятивистских ядер с ядрами
Спец.(статьи,препринты) = С 324.1д - Квантовая хромодинамика$