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.

Measurement of K*(892)(+/-) production in inelastic pp collisions at the LHC

Alessandro, B.;Alici, A.;Angeletti, M.;Aziz, S.;Banerjee, D.;Baruffaldi, F.;Basu, S.;Bearden, I. G.;Bellini, F.;Biswas, S.;Bruno, G. E.;Caffarri, D.;Colella, D.;Contin, G.;Das, P.;Das, P.;Dash, S.;De Caro, A.;De Falco, A.;Deb, S.;Evans, D.;Faggin, M.;Faivre, J.;Ghosh, P.;Giacalone, M.;Giubilato, P.;Harris, J. W.;Janik, M. A.;Jung, J.;Kim, J. S.;Kundu, S.;Lee, J.;Lunardon, M.
Membro del Collaboration Group
;
Martinez M.;Micheletti, L.;Pagano, D.;Pazzini, J.;Rehman, A.;Richter, M.;Riggi, F.;Rotondi, A.;Roy, A.;Rui, R.;Sharma, A.;Sinha, T.;Soramel, F.;Stocco, D.;Swain, S.;Szarka, I;Terrevoli, C.;Thomas, D.;Trogolo, S.;Trombetta, G.;Turrisi, R.;Uras, A.;Vercellin, E.;Wagner, B.;Wang, C.;Wright, J. R.;Wu, W.;Zhou, Y.;Zhu, J.;
2022

Abstract

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3468237
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