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Typical working day..

Roman Pasechnik

Senior lecturer

Typical working day..

Systematic study of real photon and Drell-Yan pair production in p+A (d+A) interactions


  • M. Krelina
  • Eduardo Flach Basso
  • V. P. Goncalves
  • J. Nemchik
  • R. Pasechnik

Summary, in English

We study nuclear effects in production of Drell-Yan pairs and direct photons in proton-nucleus collisions. For the first time, these effects are studied within the color dipole approach using the Green function formalism which naturally incorporates the color transparency and quantum coherence effects. The corresponding numerical results for the nuclear modification factor are compared with available data. Besides, we present a variety of predictions for the nuclear suppression as a function of transverse momentum pT, Feynman variable xF and invariant mass M of the lepton pair which can be verified by experiments at RHIC and LHC. We found that the nuclear suppression is caused predominantly by effects of quantum coherence (shadowing corrections) and by the effective energy loss induced by multiple initial state interactions. Whereas the former dominate at small Bjorken x2 in the target, the latter turns out to be significant at large x1 in the projectile beam and is universal at different energies and transverse momenta.


  • Theoretical Particle Physics - Undergoing reorganization

Publishing year





EPJ Web of Conferences



Document type

Conference paper


EDP Sciences


  • Subatomic Physics

Conference name

45th International Symposium on Multiparticle Dynamics, ISMD 2015

Conference date

2015-10-04 - 2015-10-09

Conference place

Munich, Germany