Measurement of K*(892)<SUP>±</SUP> production in inelastic pp collisions at the LHC

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The first results on K*(892)(+/-) resonance production in inelastic pp collisions at LHC energies of root s = 5.02, 8, and 13 TeV are presented. The K*(892)(+/-) (;)has been reconstructed via its hadronic decay channel K*(892)(+/-) -> K-S(0) + pi(+/-) with the ALICE detector. Measurements of transverse momentum distributions, p(T)-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 p(T) > 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 p(T) < 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 < p(T) < 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 p(T)-integrated K*(+/-)/K ratios and describe well the momentum dependence for p(T) < 2 GeV/c. (c) 2022 European Organization for Nuclear Research. Published by Elsevier B.V.

키워드

PROTON-PROTON COLLISIONSMULTIPLICITY DEPENDENCEROOT-S=7PIONKAON
제목
Measurement of K*(892)<SUP>±</SUP> production in inelastic pp collisions at the LHC
저자
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DOI
10.1016/j.physletb.2022.137013
발행일
2022-05-10
유형
Article
저널명
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
828