Measurements of D[superscript 0] and D[superscript *] production in p+p collisions at √s=200 GeV
Name
Adamczyk-2012-Measurements of D-0 and D.pdf
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1.59 MB
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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
Date Issued
October 2012
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
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.86.072013
