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Measurements of D[superscript 0] and D[superscript *] production in p+p collisions at √s=200  GeV

Author(s)
Balewski, Jan T.; Betancourt, Michael Joseph; Hays-Wehle, James Prewitt; Leight, William Axel; Seele, Joseph Patrick; Surrow, Bernd; Corliss, Ross Cameron; Redwine, Robert P; Steadman, Stephen G; van Nieuwenhuizen, Gerrit J; ... Show more Show less
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Abstract
We report measurements of charmed-hadron (D[superscript 0],D[superscript *]) 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[superscript 0]→K[superscript -]π[superscript +], D[superscript *+]→D[superscript 0]π+→K[superscript -]π[superscript +]π[superscript +] and their charge conjugates, covering the p[subscript T] range of 0.6–2.0 and 2.0–6.0  GeV/c for D[superscript 0] and D[superscript *+], respectively. From this analysis, the charm-pair production cross section at midrapidity is dσ/dy|[subscript y=0[superscript cc̅]] =170±45(stat)[subscript -59][superscript +38](sys)  μb. 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.
Date issued
2012-10
URI
http://hdl.handle.net/1721.1/76200
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review D
Publisher
American Physical Society
Citation
Adamczyk, L. et al. “Measurements of D[superscript 0] and D[superscript *] production in p+p collisions at √s=200  GeV.” Physical Review D 86.7 (2012). © 2012 American Physical Society
Version: Final published version
ISSN
1550-7998
1089-4918

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