Measurements of D-0 and D* production in p plus p collisions at root s=200 GeV

0385264 - ÚJF 2013 RIV US eng J - Článek v odborném periodiku
Adamczyk, L. - Agakishiev, G. - Aggarwal, M. M. - Ahammed, Z. - Alakhverdyants, A. V. - Alekseev, I. - Alford, J. - Anderson, B. D. - Anson, C. - Barnovská, Zuzana - Bielčík, J. - Bielčíková, Jana - Chaloupka, Petr - Chung, Paul - Hajková, O. - Kapitán, Jan - Pachr, M. - Rusňák, Jan - Šumbera, Michal - Tlustý, David … celkem 366 autorů
Measurements of D-0 and D* production in p plus p collisions at root s=200 GeV.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 86, č. 7 (2012), s. 072013. ISSN 1550-7998
Grant CEP: GA MŠMT LA09013
Institucionální podpora: RVO:61389005
Klíčová slova: heavy quarks * heavy mesons * relativistic collisions
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 4.691, rok: 2012

We report measurements of charmed-hadron (D-0, D*) production cross sections at midrapidity in p + p collisions at a center-of-mass energy of 200 GeV by the STAR experiment. Charmed hadrons were reconstructed via the hadronic decays D-0 -> K- pi(+), D*(+) -> D-0 pi(+) -> K-pi(+)pi(+) and their charge conjugates, covering the p(T) range of 0.6-2.0 and 2.0-6.0 GeV/c for D-0 and D*(+), respectively. From this analysis, the charm-pair production cross section at midrapidity is d sigma/dy vertical bar(c (c) over bar)(y-0) = 170+/-45(stat)(-59)(+38()sys) mu b. The extracted charm-pair cross section is compared to perturbative QCD calculations. The transverse momentum differential cross section is found to be consistent with the upper bound of a fixed-order next-to-leading logarithm calculation.
Trvalý link: http://hdl.handle.net/11104/0216901