K*(0) production in Cu plus Cu and Au plus Au collisions at root s(NN)=62.4 GeV and 200 GeV

0365034 - ÚJF 2013 RIV US eng J - Článek v odborném periodiku
Aggarwal, M. M. - Ahammed, Z. - Alakhverdyants, A. V. - Alekseev, G. D. - Alford, J. - Arkhipkin, D. - Averichev, G. S. - Balewski, J. - Barnby, L. S. - Baumgart, S. - Beavis, D.R. - Bellwied, R. - Betancourt, M.J. - Betts, R. R. - Bhasin, A. - Bhati, A.K. - Bielčík, J. - Bielčíková, Jana - Chaloupka, Petr - Chung, P. - Leyva, A.D. … celkem 385 autorů
K*(0) production in Cu plus Cu and Au plus Au collisions at root s(NN)=62.4 GeV and 200 GeV.
Physical Review. C. Roč. 84, č. 3 (2011), 034909. ISSN 0556-2813
Výzkumný záměr: CEZ:AV0Z1048901
Klíčová slova: HEAVY-ION COLLISIONS * QUARK-GLUON PLASMA * MESON PRODUCTION * FREEZE-OUT * ENERGY * COLLABORATION * DISTRIBUTIONS * RESTORATION * PERSPECTIVE * EXTRACTION
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 3.308, rok: 2011

We report on K*(0) production at midrapidity in Au + Au and Cu + Cu collisions at root s(NN) = 62.4 and 200 GeV collected by the Solenoid Tracker at the Relativistic Heavy Ion Collider detector. The K*(0) is reconstructed via the hadronic decays K*(0) -> K(+)pi(-) and (K*(0)) over bar -> K(+)pi(-). Transverse momentum, p(T), spectra are measured over a range of p(T) extending from 0.2 GeV/c up to 5 GeV/c. The center-of-mass energy and system size dependence of the rapidity density, dN/dy, and the average transverse momentum, p(T), are presented. The measured N(K*(0))/N(K) and N(phi)/N(K*(0)) ratios favor the dominance of rescattering of decay daughters of K*(0) over the hadronic regeneration for the K*(0) production. In the intermediate p(T) region (2.0 < p(T) < 4.0 GeV/c), the elliptic flow parameter, v(2), and the nuclear modification factor, R(CP), agree with the expectations from the quark coalescence model of particle production.
Trvalý link: http://hdl.handle.net/11104/0200374