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} = 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.
Highlights
Hadron production in inelastic high-energy proton-proton collisions is dominated by soft processes of quantum chromodynamics (QCD)
Monte Carlo event generators, in which these models are implemented, are used at the Large Hadron Collider (LHC) to simulate the final-state particles originating from the soft component of a collision
The ROOT [28] and LHCb [29, 30] software frameworks are used for the initial data preparation, while the analysis is written in the Python language with standard scientific packages [31,32,33,34,35,36] and high-energy-physics-specific packages [37,38,39,40] from the Scikit-HEP project [41]
Summary
Hadron production in inelastic high-energy proton-proton (pp) collisions is dominated by soft processes of quantum chromodynamics (QCD). Precision measurements of prompt charged-particle production in collisions at the TeV energy scale are needed to validate and tune the hadronic-interaction models and to safely extrapolate them to even higher collision energies that are of interest in astroparticle physics. This tuning results in a more accurate simulation, which is essential, e.g., in searches for physics beyond the Standard Model. The differential cross-section is measured as a function of transverse momentum and pseudorapidity in the ranges pT ∈ [0.08, 10.00) GeV/c and η ∈ [2.0, 4.8) and is determined separately for positively and negatively charged particles Both the charge-combined differential cross-section and the ratio of the differential cross-sections for the two charges are compared with predictions from four different hadronic-interaction models.
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