Measurement of single electrons and implications for charm production in Au+Au collisions at sqrt(s_NN)= 130 GeV
Measurement of single electrons and implications for charm production in Au+Au collisions at sqrt(s_NN)= 130 GeV
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DOI：
10.1103/physrevlett.88.192303
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发表时间：
2002-02
期刊：
影响因子：
--
通讯作者：
K. Adcox;et al.;Phenix Collaboration
中科院分区：
文献类型：
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作者：
K. Adcox;et al.;Phenix Collaboration
利用PHENIX实验测量了sqrt（s_NN）= 130 GeV的Au+Au碰撞电子的横动量谱。光谱显示出光子转换和轻强子衰变的背景以上的过量。电子信号与粲的半轻子衰变的预期一致。当p_T> 0.8GeV/c时，电子信号dN_e/dy产额为0.025 ± 0.004（stat.）+/- 0.010（系统）在中心碰撞中，相应的魅力截面为380 +/- 60（统计）。+/- 200（系统）每一次核子-核子碰撞的微仓数。
Transverse momentum spectra of electrons from Au+Au collisions at sqrt(s_NN) = 130 GeV have been measured by the PHENIX experiment at RHIC. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semi-leptonic decays of charm. The yield of the electron signal dN_e/dy for p_T>0.8 GeV/c is 0.025 +/- 0.004 (stat.) +/- 0.010 (sys.) in central collisions, and the corresponding charm cross section is 380 +/- 60 (stat.) +/- 200 (sys.) micro barns per binary nucleon-nucleon collision.