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Roman Pasechnik

Senior lecturer

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Nuclear effects in Drell-Yan production at the LHC


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

Summary, in English

Using the color dipole formalism we study production of Drell-Yan (DY) pairs in proton-nucleus interactions in the kinematic region corresponding to LHC experiments. Lepton pairs produced in a hard scattering are not accompanied with any final state interactions leading to either energy loss or absorption. Consequently, dileptons may serve as more efficient and cleaner probes for the onset of nuclear effects than nclusive hadron production. We perform a systematic analysis of these effects in production of Drell-Yan pairs in pPb interaction at the LHC. We present predictions for the nuclear suppression as a function of the dilepton transverse momentum, rapidity and invariant mass which can be verified by the LHC measurements. We found that a strong nuclear suppression can be interpreted as an effective energy loss proportional to the initial energy universally induced by multiple initial state interactions. In addition, we study a contribution of coherent effects associated with the gluon shadowing affecting the observables predominantly at small and medium-high transverse momenta.


  • Theoretical Particle Physics
  • Department of Astronomy and Theoretical Physics

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