Soft-Dielectron Excess in Proton-Proton Collisions at s =13 TeV

Academic Article

Abstract

  • A measurement of dielectron production in proton-proton (pp) collisions at s=13 TeV, recorded with the ALICE detector at the CERN LHC, is presented in this Letter. The data set was recorded with a reduced magnetic solenoid field. This enables the investigation of a kinematic domain at low dielectron (ee) invariant mass mee and pair transverse momentum pT,ee that was previously inaccessible at the LHC. The cross section for dielectron production is studied as a function of mee, pT,ee, and event multiplicity dNch/dη. The expected dielectron rate from hadron decays, called hadronic cocktail, utilizes a parametrization of the measured η/π0 ratio in pp and proton-nucleus collisions, assuming that this ratio shows no strong dependence on collision energy at low transverse momentum. Comparison of the measured dielectron yield to the hadronic cocktail at 0.15
  • Authors

    Published In

    Digital Object Identifier (doi)

    Pubmed Id

  • 28295711
  • Author List

  • Acharya S; Adamová D; Adler A; Adolfsson J; Aggarwal MM; Aglieri Rinella G; Agnello M; Agrawal N; Ahammed Z; Ahmad S
  • Volume

  • 127
  • Issue

  • 4