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Measurement of K.sup.0./sup..sub.S./sub. and K.sup.∗./sup..sub.0./sub. in p+p, d+Au, and Cu+Cu collisions at √s.sub.NN./sub.=200 GeV

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    0522653 - FZÚ 2020 RIV US eng J - Journal Article
    Adare, A. - Afanasiev, S. - Ajitanand, N.N. - Kubart, J. - Mašek, L. - Mikeš, P. - Růžička, Pavel - Tomášek, Lukáš - Vrba, Václav
    Measurement of K0S and K0 in p+p, d+Au, and Cu+Cu collisions at √sNN=200 GeV.
    Physical Review C. Roč. 90, č. 5 (2014), s. 1-18, č. článku 054905. ISSN 2469-9985. E-ISSN 2469-9993
    Institutional support: RVO:68378271
    Keywords : Brookhaven RHIC Coll * K0(S) --> 2pi0 * K*(892)0 --> K+ pi * 200 GeV-cms/nucleon * experimental results
    Subject RIV: BF - Elementary Particles and High Energy Physics
    OBOR OECD: Particles and field physics
    Impact factor: 3.733, year: 2014

    The PHENIX experiment at the Relativistic Heavy Ion Collider has performed a systematic study of KS0 and K*0 meson production at midrapidity in p+p,d+Au, and Cu+Cu collisions at sNN=200 GeV. The KS0 and K*0 mesons are reconstructed via their KS0→π0(→γγ)π0(→γγ) and K*0→K±π∓ decay modes, respectively. The measured transverse-momentum spectra are used to determine the nuclear modification factor of KS0 and K*0 mesons in d+Au and Cu+Cu collisions at different centralities. In the d+Au collisions, the nuclear modification factor of KS0 and K*0 mesons is almost constant as a function of transverse momentum and is consistent with unity, showing that cold-nuclear-matter effects do not play a significant role in the measured kinematic range. In Cu+Cu collisions, within the uncertainties no nuclear modification is registered in peripheral collisions.
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