arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1109.4607nucl-exhep-ex
收藏

在LHC和ALICE的pp和Pb-Pb碰撞中重味的产生

Heavy-flavor production in pp and Pb-Pb collisions at LHC with ALICE

Kai Schweda

摘要:

本文报道了大型强子对撞机ALICE实验在P-P碰撞和$\sqrt{s} = 2.76$ TeV碰撞中的开粲强子产生的最新结果。开粲强子在强子衰变通道\DtoKpi、\DtoKpipi和\DstartoDpi % $D^0\rightarrow K^-π^+$、$D^+\rightarrow K^-π^+ π^+$和$D^{*+} \rightarrow D^0 (K^-π^+) + π^+$中运动学上完全重建,并通过它们的不变质量来识别。通过选择置换顶点拓扑来最小化组合背景。包容性的魅力和美丽的生产是通过检测电子(μ子)从半轻子衰变的开放的魅力和美丽的强子在中央(前)区。最先进的QCD计算结果的比较。本文首次给出了强子和半轻子衰变铅-铅碰撞核修正因子的结果。

英文摘要:

We report recent results from the ALICE experiment the Large Hadron Collider on open charmed hadron production in pp collisions at $\sqrt{s} = 2.76$ and 7 TeV, and Pb-Pb collisions at $\sqrt{\mathrm{s}_{_{\mathrm{NN}}}} = 2.76$ TeV. Open charmed hadrons are kinematically fully reconstructed in the hadronic decay channels \DtoKpi, \DtoKpipi, and \DstartoDpi %$D^0\rightarrow K^-π^+$, $D^+\rightarrow K^-π^+ π^+$, and $D^{*+} \rightarrow D^0 (K^-π^+) + π^+$ and identified through their invariant mass. Combinatorial background is minimized by selecting a displaced vertex topology. Inclusive charm and beauty production is measured by detecting electrons (muons) from semi-leptonic decays of open charmed and beauty hadrons in the central (forward) region. Comparison to results from state-of-the-art QCD calculations is given. First results on nuclear modifications factors in Pb--Pb collisions from hadronic and semi-leptonic decays are presented.

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。

↑