Hadronic production of $\Xi_{cc}$ at the After@LHC with intrinsic charm mechanism
Hadronic production of $\Xi_{cc}$ at the After@LHC with intrinsic charm mechanism
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DOI：
10.1103/physrevd.100.054022
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发表时间：
2019-03
期刊：
影响因子：
--
通讯作者：
Gu Chen;Xing-Gang Wu;Shuai Xu
中科院分区：
文献类型：
--
作者：
Gu Chen;Xing-Gang Wu;Shuai Xu
本文详细讨论了在LHC（@LHC之后）的一个固定靶实验中，$\Xi_{cc}$的强子产生。入射强子中的粲分量既可以是外生的，也可以是内生的。除了我们以前考虑的产生机制[Phys.Rev.D{\bf 89}，074020（2014）]之外，我们还证明了如果考虑内禀粲并将质子内禀粲的比例设为$A_{\rm in}=1\%$，则$g+c$和$c+c$产生机制的总截面将增加约两倍。因此，要生成的$\Xi_{cc}$事件的数量可以大大增加。由于After@LHC产生的Xi_{cc}$的总截面和微分分布对A_{in}$的值很敏感，After@LHC可能是测试内在魅力的好平台。
In the present paper, we present a detailed discussion on the hadronic production of $\Xi_{cc}$ at a fixed target experiment at the LHC (After@LHC). The charm components in the incident hadrons could be either extrinsic or intrinsic. In addition to our previously considered production mechanisms [Phys.Rev.D{\bf 89}, 074020(2014)], we show that if taking the intrinsic charm into account and setting the proportion of intrinsic charm in a proton as $A_{\rm in}=1\%$ , total cross-sections for the $g+c$ and $c+c$ production mechanisms shall be increased by about two times. Thus the number of $\Xi_{cc}$ events to be generated can be greatly enhanced. Since the total cross sections and differential distributions for the $\Xi_{cc}$ production at the After@LHC are sensitive to the value of $A_{\rm in}$, the After@LHC could be a good platform for testing the idea of intrinsic charm.