Open charm production in double parton scattering processes in the forward kinematics

B. Blok, M. Strikman

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We calculate the rate of double open charm production in the forward kinematics studied recently in the LHCb experiment. We find that the mean field approximation for the double parton GPD (generalized parton distributions), which neglects parton–parton correlations, underestimates the rate by a factor of 2. The enhancement due to the perturbative QCD correlation 1 ⊗ 2 mechanism which explains the rate of double parton interactions at the central rapidities is found to explain 60 ÷ 80% of the discrepancy. We argue that the nonperturbative fluctuations leading to non-factorized (correlated) contributions to the initial conditions for the DGLAP collinear evolution of the double parton GPD play an important role in this kinematics. Combined, the two correlation mechanisms provide a good description of the rate of double charm production reported by the LHCb. We also give predictions for the variation of the σeff(i.e. the ratio of double and square of single inclusive rates) in the discussed kinematics as a function of pt. The account for two correlation mechanisms strongly reduces the sensitivity of the results to the starting point of the QCD evolution.

Original languageEnglish (US)
Article number694
JournalEuropean Physical Journal C
Volume76
Issue number12
DOIs
StatePublished - Dec 1 2016

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Open charm production in double parton scattering processes in the forward kinematics'. Together they form a unique fingerprint.

Cite this