Measurement of charged pion, kaon, and proton production in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Abstract

Transverse momentum spectra of charged pions, kaons, and protons are measured in proton-proton collisions at $\sqrt{s}$ = 13  TeV with the CMS detector at the LHC. The particles, identified via their energy loss in the silicon tracker, are measured in the transverse momentum range of $p_T \approx 0.1–1.7  GeV/c$ and rapidities $\vert y \vert < 1$. The $p_T$ spectra and integrated yields are compared to previous results at smaller $\sqrt{s}$ and to predictions of Monte Carlo event generators. The average $p_T$ increases with particle mass and charged particle multiplicity of the event. Comparisons with previous CMS results at $\sqrt{s}$ = 0.9, 2.76, and 7 TeV show that the average $p_T$ and the ratios of hadron yields feature very similar dependences on the particle multiplicity in the event, independently of the center-of-mass energy of the pp collision.