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Open Charm Yields in 200 GeV p+p and d+Au Collisions at RHIC | | Lijuan Ruan
; | | Date: |
27 Mar 2004 | | Journal: | J.Phys. G30 (2004) S1197-S1200 | | Subject: | nucl-ex | | Affiliation: | for the STAR Collaboration | | Abstract: | Open charm spectra at mid-rapidity from direct reconstruction of $D^{0} o Kpi$ and indirect electron/positron measurements via charm semileptonic decay in p+p and d+Au collisions at $sqrt{s_{_{
m NN}}}$ = 200 GeV are reported. The combined spectra cover open charm transverse momentum range $0.1{}^{<}_{sim}p_{T}{}^{<}_{sim}6$ GeV/$c$. The electron spectra show approximate binary scaling between p+p and d+Au collisions. From these two independent analyses, the differential cross section per nucleon-nucleon interaction at mid-rapidity for open charm production at RHIC is $dsigma^{NN}_{car{c}}/dy$=0.31$pm$0.04(stat.)$pm$0.08(syst.) mb. The next-to-leading-order pQCD calculation underpredicts the charm yields. | | Source: | arXiv, nucl-ex/0403054 | | Services: | Forum | Review | PDF | Favorites | |
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