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Beyond nPDFs effects : Prompt J/psi and psi(2S) production in pPb and pp collisions

Author
Sirunyan A.M. Yerevan Physics Institute, Armenia
Finger Miroslav, prof. Ing. DrSc. Faculty of Mathematics and Physics, Charles University in Prague
Finger Michael, M.Sc. CSc. Faculty of Mathematics and Physics, Charles University in Prague, JINR Dubna
Matveev V.A. JINR
et al.  different institutions

Year
2019

Scientific journal
NUCLEAR PHYSICS A 982 743-746

Web


Abstract
A multi-dimensional analysis of prompt charmonia in pp and pPb collisions at root s(NN) = 5.02 TeV with the CMS detector is presented. The pPb differential cross-sections of prompt J/psi are shown in a wide kinematic region, for transverse momentum p(T) spanning from 2 to 30 GeV/c and a rapidity interval between -2.4 to 1.93 in the center of mass of the collision. The final results on prompt psi/(2S) meson production cross section in pp and pPb collisions at 5.02 TeV are also reported as a function of p(T) and rapidity, for p(T) from 4 to 30 GeV/c. The nuclear modification factor is found to be smaller than that of prompt J/psi in all measured bins, especially at low p(T) and at backward rapidity. Such a different behaviour between the ground and excited states cannot be reproduced considering nPDF effects alone.

Cite article as:
A. Sirunyan, M. Finger, M. Finger, V. Matveev, . et al., "Beyond nPDFs effects : Prompt J/psi and psi(2S) production in pPb and pp collisions ", NUCLEAR PHYSICS A 982 743-746 (2019)