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arXiv 1007.1200nucl-ex
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$\sqrt{s} $ =200 GeV的$p+p$碰撞中非光子电子产生的底部贡献的测量

Measurement of the Bottom contribution to non-photonic electron production in $p+p$ collisions at $\sqrt{s} $=200 GeV

STAR Collaboration, M. M. Aggarwal

摘要:

利用非光子电子与强子的方位角关联,测量了在$\sqrt{s} =$ 200 GeV的$p+p$碰撞中,重味介子的半轻子衰变产生的非光子电子对$B$介子衰变的贡献.在横向动量为$p_{T} \geq 5$ GeV/ $c$时,提取的$B$衰变贡献约为50%。这些测量约束了$B$和$D$介子衰变电子的核修正因子。结果表明,在高$p_{T}$下,重离子碰撞中$B$介子的产生也受到抑制。

英文摘要:

The contribution of $B$ meson decays to non-photonic electrons, which are mainly produced by the semi-leptonic decays of heavy flavor mesons, in $p+p$ collisions at $\sqrt{s} =$ 200 GeV has been measured using azimuthal correlations between non-photonic electrons and hadrons. The extracted $B$ decay contribution is approximately 50% at a transverse momentum of $p_{T} \geq 5$ GeV/$c$. These measurements constrain the nuclear modification factor for electrons from $B$ and $D$ meson decays. The result indicates that $B$ meson production in heavy ion collisions is also suppressed at high $p_{T}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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