Measurement of K(892)± production in inelastic pp collisions at the LHC

ALICE Collaboration

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The first results on K(892)± resonance production in inelastic pp collisions at LHC energies of s=5.02, 8, and 13 TeV are presented. The K(892)± has been reconstructed via its hadronic decay channel K(892)→±KS0± with the ALICE detector. Measurements of transverse momentum distributions, pT-integrated yields, and mean transverse momenta for charged K(892) are found to be consistent with previous ALICE measurements for neutral K(892) within uncertainties. For pT>1 GeV/c the K(892)± transverse momentum spectra become harder with increasing centre-of-mass energy from 5.02 to 13 TeV, similar to what previously observed for charged kaons and pions. For pT<1 GeV/c the K(892)± yield does not evolve significantly and the abundance of K(892)± relative to K is rather independent of the collision energy. The transverse momentum spectra, measured for K(892)± at midrapidity in the interval 0 < pT<15 GeV/c, are not well described by predictions of different versions of PYTHIA 6, PYTHIA 8 and EPOS-LHC event generators. These generators reproduce the measured pT-integrated K⁎±/K ratios and describe well the momentum dependence for pT<2 GeV/c.

Idioma originalInglés
Número de artículo137013
PublicaciónPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
EstadoPublicada - 10 may. 2022


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