Open Charm Yields in d+Au Collisions at √s_NN = 200 GeV

Author Info

STAR Collaboration
T.D. Gutierrez, University of California, DavisFollow

Recommended Citation

Published in Physical Review Letters, Volume 94, Issue 6, February 17, 2005, pages 062301-1-062301-6.

STAR is composed of 63 institutions from 13 countries, with a total of 611 collaborators. A variety of personnel participate in the collaboration, including students, university faculty and staff, national laboratory staff, and engineers.

For more information on the STAR Collaboration, visit https://www.star.bnl.gov

The definitive version is available at https://doi.org/10.1103/PhysRevLett.94.062301.

Abstract

Midrapidity open charm spectra from direct reconstruction of D⁰(D⁰)→K^∓π^± in d+Au collisions and indirect electron-positron measurements via charm semileptonic decays in p+p and d+Au collisions at √s_NN=200  GeV are reported. The D⁰(D⁰) spectrum covers a transverse momentum (p_T) range of 0.1T<3  GeV/c, whereas the electron spectra cover a range of 1T<4  GeV/c. The electron spectra show approximate binary collision scaling between p+p and d+Au collisions. From these two independent analyses, the differential cross section per nucleon-nucleon binary interaction at midrapidity for open charm production from d+Au collisions at BNL RHIC is dσ^NN_c¯c/dy=0.30±0.04(stat)±0.09(syst)   mb. The results are compared to theoretical calculations. Implications for charmonium results in A+A collisions are discussed.

Disciplines

Physics

Copyright

2005 American Physical Society.

Number of Pages

6

Publisher statement

This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society.

NOTE: At the time of publication, the author Thomas Gutierrez was not yet affiliated with Cal Poly.