Open charm yields in d+Au collisions at sqrt[sNN]=200 GeV
Midrapidity open charm spectra from direct reconstruction of D0(D0-bar)-->K± pi ± in d+Au collisions and indirect electron-positron measurements via charm semileptonic decays in p+p and d+Au collisions at sqrt[sNN]=200 GeV are reported. The D0(D0-bar) spectrum covers a transverse momentum (pT) range of 0.1<pT<3 GeV/c, whereas the electron spectra cover a range of 1<pT<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 d sigma NNcc-bar/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.
| Author: | J. Adams, Jens Berger, Thomas Dietel, Thorsten Kollegger, Jens Sören Lange, Reinhard Stock, et al., STAR Collaboration |
|---|---|
| URN: | urn:nbn:de:hebis:30-19155 |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 14.10.2005 |
| Year of first Publication: | 2005 |
| Publishing Institution: | Univ.-Bibliothek Frankfurt am Main |
| Source: | Phys. Rev. Lett. 94, 062301 (2005), ©2005 The American Physical Society, http://link.aps.org/abstract/PRL/v94/e062301 |
| HeBIS PPN: | 188847006 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 530 Physik |
| PACS-Classification: | 13.20.Fc Decays of charmed mesons |
| 13.25.Ft Decays of charmed mesons | |
| 24.85.+p Quarks, gluons, and QCD in nuclear reactions | |
| 25.75.Dw Particle and resonance production | |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Veröffentlichungsvertrag für Publikationen ohne Print on Demand |
