Measurement of $K_S^0$ and $K^{*0}$ in $p$$+$$p$, $d$$+$Au, and Cu$+$Cu collisions at $\sqrt{s_{_{NN}}}=200$ GeV
Creators: name: Adare, A.
name: Afanasiev, S.
name: Aidala, C.
name: Ajitanand, N. N.
name: Akiba, Y.
name: Akimoto, R.
name: Al-Bataineh, H.
name: Alexander, J.
name: Alfred, M.
name: Angerami, A.
name: Aoki, K.
name: Apadula, N.
name: Aphecetche, L.
name: Aramaki, Y.
name: Armendariz, R.
name: Aronson, S. H.
name: Asai, J.
name: Asano, H.
name: Atomssa, E. T.
name: Averbeck, R.
name: Awes, T. C.
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name: Baldisseri, A.
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name: Barnes, P. D.
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name: Baublis, V.
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name: Bazilevsky, A.
name: Beaumier, M.
name: Beckman, S.
name: Belikov, S.
name: Belmont, R.
name: Bennett, R.
name: Berdnikov, A.
name: Berdnikov, Y.
name: Bhom, J. H.
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name: Campbell, S.
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name: Chang, B. S.
name: Charvet, J. -L.
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name: Chiu, M.
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name: Cianciolo, V.
name: Citron, Z.
name: Cleven, C. R.
name: Cole, B. A.
name: Comets, M. P.
name: del Valle, Z. Conesa
name: Connors, M.
name: Constantin, P.
name: Csanád, M.
name: Csörgő, T.
name: Dahms, T.
name: Dairaku, S.
name: Danchev, I.
name: Das, K.
name: Datta, A.
name: Daugherity, M. S.
name: David, G.
name: Dayananda, M. K.
name: Deaton, M. B.
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name: Ying, J.
name: Yokkaichi, S.
name: Yoon, I.
name: You, Z.
name: Young, G. R.
name: Younus, I.
name: Yushmanov, I. E.
name: Zajc, W. A.
name: Zaudtke, O.
name: Zelenski, A.
name: Zhang, C.
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name: Zimányi, J.
name: Zolin, L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The PHENIX experiment at the Relativistic Heavy Ion Collider has performed a systematic study of $K_S^0$ and $K^{*0}$ meson production at midrapidity in $p$$+$$p$, $d$$+$Au, and Cu$+$Cu collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The $K_S^0$ and $K^{*0}$ mesons are reconstructed via their $K_S^0 \rightarrow π^0(\rightarrow γγ)π^0(\rightarrowγγ)$ and $K^{*0} \rightarrow K^{\pm}π^{\mp}$ decay modes, respectively. The measured transverse-momentum spectra are used to determine the nuclear modification factor of $K_S^0$ and $K^{*0}$ mesons in $d$$+$Au and Cu$+$Cu collisions at different centralities. In the $d$$+$Au collisions, the nuclear modification factor of $K_S^0$ and $K^{*0}$ mesons is almost constant as a function of transverse momentum and is consistent with unity showing that cold-nuclear-matter effects do not play a significant role in the measured kinematic range. In Cu$+$Cu collisions, within the uncertainties no nuclear modification is registered in peripheral collisions. In central collisions, both mesons show suppression relative to the expectations from the $p$$+$$p$ yield scaled by the number of binary nucleon-nucleon collisions in the Cu$+$Cu system. In the $p_T$ range 2--5 GeV/$c$, the strange mesons ($K_S^0$, $K^{*0}$) similarly to the $ϕ$ meson with hidden strangeness, show an intermediate suppression between the more suppressed light quark mesons ($π^0$) and the nonsuppressed baryons ($p$, $\bar{p}$). At higher transverse momentum, $p_T&gt;5$ GeV/$c$, production of all particles is similarly suppressed by a factor of $\approx$ 2.
description: 590 authors, 22 pages, 14 figures, 5 tables. Submitted to Phys. Rev. C Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html