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arXiv 1111.1553hep-ex
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$\sqrt{s} = 7$ TeV质子-质子碰撞中心快度粲产生的测量

Measurement of charm production at central rapidity in proton-proton collisions at $\sqrt{s} = 7$ TeV

ALICE Collaboration

摘要:

利用ALICE探测器在LHC上测量了快度范围|y| <0.5的瞬发粲介子$D^0$、$D^+$和$D^{*+}$在$\sqrt{s} = 7$ TeV质子-质子碰撞中的$p_{\rm T}$ -微分包含产生截面.重建衰变$D^0\rightarrow K^-π^+$、$D^+\rightarrow K^-π^+π^+$、$D^{*+}\rightarrow D^0π^+$和它们的电荷共轭物,在选择切割后,在用最小偏置触发器收集的3.14 × 10 11 $^8$事件的数据样本中(积分光度$L_{\rm int}$ = 5/nb),大约8,400个$D^0$、2,900个$D^+$和2,600个$D^{*+}$介子(1< $p_{\rm T}$ <24 GeV/ $c$)被计数。结果描述的不确定性的预测的基础上微扰QCD。

英文摘要:

The $p_{\rm T}$-differential inclusive production cross sections of the prompt charmed mesons $D^0$, $D^+$, and $D^{*+}$ in the rapidity range |y|<0.5 were measured in proton-proton collisions at $\sqrt{s} = 7$ TeV at the LHC using the ALICE detector. Reconstructing the decays $D^0\rightarrow K^-π^+$, $D^+\rightarrow K^-π^+π^+$, $D^{*+}\rightarrow D^0π^+$, and their charge conjugates, about 8,400 $D^0$, 2,900 $D^+$, and 2,600 $D^{*+}$ mesons with 1<$p_{\rm T}$<24 GeV/$c$ were counted, after selection cuts, in a data sample of 3.14x10$^8$ events collected with a minimum-bias trigger (integrated luminosity $L_{\rm int}$ = 5/nb). The results are described within uncertainties by predictions based on perturbative QCD.

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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