Mapping the dominant regions of the phase space associated with c c - production relevant for the prompt atmospheric neutrino flux

Research output: Contribution to journalArticle

Abstract

We present a detailed mapping of the dominant kinematical domains contributing to the prompt atmospheric neutrino flux at high neutrino energies by studying their sensitivity to the cuts on several kinematical variables crucial for charm production in cosmic ray scattering in the atmosphere. This includes the maximal center-of-mass energy for proton-proton scattering, the longitudinal momentum fractions of partons in the projectile (cosmic ray) and target (nucleus of the atmosphere), the Feynman xF variable, and the transverse momentum of charm quark/antiquark. We find that the production of neutrinos with energies larger than Eν>107 GeV is particularly sensitive to the c.m. energies larger than the ones at the LHC and to the longitudinal momentum fractions in the projectile 10-8<x<10-5. Clearly, these are regions where we do not control the parton, in particular, gluon, densities. We also analyze the characteristic theoretical uncertainties in the charm production cross section coming from its QCD modeling. The precision data on the prompt atmospheric neutrino flux can efficiently constrain the mechanism of heavy quark production and underlying QCD dynamics in kinematical ranges beyond the reach of the current collider measurements.

Details

Authors
Organisations
External organisations
  • Federal University of Pelotas
  • University of Rzeszów
  • Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number094026
JournalPhysical Review D
Volume96
Issue number9
Publication statusPublished - 2017 Nov 28
Publication categoryResearch
Peer-reviewedYes