Measurement of prompt charged-particle production in pp collisions at $$ \sqrt{\mathrm{s}} $$ = 13 TeV

Abstract

The differential cross-section of prompt inclusive production of long-lived charged particles in proton-proton collisions is measured using a data sample recorded by the LHCb experiment at a centre-of-mass energy of $$ \sqrt{s} $$ s = 13 TeV. The data sample, collected with an unbiased trigger, corresponds to an integrated luminosity of 5.4 nb−1. The differential cross-section is measured as a function of transverse momentum and pseudorapidity in the ranges pT ∈ [80, 10 000) MeV/c and η ∈ [2.0, 4.8) and is determined separately for positively and negatively charged particles. The results are compared with predictions from various hadronic-interaction models.

Recent LHCb results on forward physics and diffraction

“…A good proxy for light hadron production is the production of prompt 2 long-lived charged particles. The precision achieved in this measurement [37] is useful for an improved simulation of the underlying events in collisions at the LHC and of the interactions in the Earth's atmosphere that cause air showers. A small set of loose requirements is used to maintain high selection efficiency and the analysis uses an unbiased trigger.…”

Recent results from LHCb for astroparticle physics

“…Prompt charged particles were studied in two separate analyses; in proton-proton collisions at 13 TeV [26,27], and at 5 TeV in proton-proton and proton-lead collisions [26,27]. Both analyses report the double differential cross-sections in p T and pseudorapidity η; the latter also reports the nuclear modification factor.…”