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arXiv 2303.17864hep-ph
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SACOT-$m_{\ m T}$方案中的B介子强子产生

B-meson hadroproduction in the SACOT-$m_{\rm T}$ scheme

Ilkka Helenius, Hannu Paukkunen

AI总结:

本文采用SACOT-$m_{\ m T}$ GM-VFNS在NLO QCD下计算强子碰撞中的包容性B介子产生,并通过LHC的pp和pPb数据验证其理论描述与不确定性。

摘要:

我们将SACOT-$m_{\ m T}$广义质量变味数方案(GM-VFNS)应用于微扰量子色动力学次领头阶下强子碰撞中的包容性B介子产生。在GM-VFNS方法中,人们将在低横动量($p_{\ m T}$)下精确的固定阶重夸克产生截面,与在高$p_{\ m T}$下精确的零质量截面相匹配。SACOT-$m_{\ m T}$方案的物理思想是通过在整个计算中计入产生重夸克-反夸克对所需的有限动量转移来实现这一点。我们将结果与来自质子-质子和质子-铅碰撞的最新LHC数据进行比较,发现在估计的理论不确定性内符合得非常好。我们还讨论了与方案相关的差异及其对标度不确定性的影响。

英文摘要:

We apply the SACOT-$m_{\rm T}$ general-mass variable flavour number scheme (GM-VFNS) to the inclusive B-meson production in hadronic collisions at next-to-leading order in perturbative Quantum Chromodynamics. In the GM-VFNS approach one matches the fixed-order heavy-quark production cross sections, accurate at low transverse momentum ($p_{\rm T}$), with the zero-mass cross sections, accurate at high $p_{\rm T}$. The physics idea of the SACOT-$m_{\rm T}$ scheme is to do this by accounting for the finite momentum transfer required to create a heavy quark-antiquark pair throughout the calculation. We compare our results with the latest LHC data from proton-proton and proton-lead collisions finding a very good agreement within the estimated theoretical uncertainties. We discuss also scheme-related differences and their impact on the scale uncertainties.

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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