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arXiv 1701.08451hep-phhep-exnucl-exnucl-th
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$D$ -介子在非常向前快度下的产生:估计内禀粲贡献

$D$ - meson production at very forward rapidities: estimating the intrinsic charm contribution

F. Carvalho, A. V. Giannini, V. P. Goncalves, F. S. Navarra

摘要:

考虑QCD动力学中的非线性效应和质子波函数的内禀粲分量,我们研究了前向快度下的$D$ -介子产生。计算了不同质心能量下$p p$碰撞的总截面、快度分布和Feynman-$x$分布。我们的结果表明,在LHC,内在的魅力成分改变了$D$快度分布的区域,这是超出了LHCb探测器的覆盖范围。在较高能量下,IC组分在$y$和$x_F$分布中占主导地位,恰好在所产生的$D$介子衰变的范围内,并且对ICECUBE协作组测量的瞬发大气中微子通量贡献最大。我们计算的$x_F$ -分布,并证明它们在大型强子对撞机的能量增强约一个数量级的$0.2 \le x_F \le 0.8$范围内。

英文摘要:

We study $D$ - meson production at forward rapidities taking into account the non - linear effects in the QCD dynamics and the intrinsic charm component of the proton wave function. The total cross section, the rapidity distributions and the Feynman - $x$ distributions are calculated for $p p$ collisions at different center of mass energies. Our results show that, at the LHC, the intrinsic charm component changes the $D$ rapidity distributions in a region which is beyond the coverage of the LHCb detectors. At higher energies the IC component dominates the $y$ and $x_F$ distributions exactly in the range where the produced $D$ mesons decay and contribute the most to the prompt atmospheric neutrino flux measured by the ICECUBE Collaboration. We compute the $x_F$ - distributions and demonstrate that they are enhanced at LHC energies by approximately one order of magnitude in the $0.2 \le x_F \le 0.8$ range.

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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