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arXiv 1702.04207hep-ph
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LHC上夸克偶素的产生:对令人惊讶的简单数据模式的唯象分析

Quarkonium production at the LHC: a phenomenological analysis of surprisingly simple data patterns

Pietro Faccioli, Mariana Araújo, Valentin Knünz, Ilse Krätschmer, Carlos Lourenço, João Seixas

摘要:

大型强子对撞机夸克偶素产生的测量揭示了一个惊人的观察:J/ $ψ$、$ψ$(2S)、$χ_{c1,2}$和$Υ$(nS)$p_{\rm T}$ -微分截面与一个普遍的动量标度模式相容。考虑到直接和间接产生的S波介子没有强极化,我们得出的结论是,目前还没有证据表明部分子产生机制依赖于终态的量子数和质量。支持这种普遍的生产情况下的实验观察是非常显着的,所示的一种新的分析方法,不偏的特定理论计算的部分截面,这只是被认为是后验,在与数据驱动的结果相比。

英文摘要:

The LHC quarkonium production measurements reveal a startling observation: the J/$ψ$, $ψ$(2S), $χ_{c1,2}$ and $Υ$(nS) $p_{\rm T}$-differential cross sections are compatible with one universal momentum scaling pattern. Considering also the absence of strong polarizations of directly and indirectly produced S-wave mesons, we are led to the conclusion that there is currently no evidence of a dependence of the partonic production mechanisms on the quantum numbers and mass of the final state. The experimental observations supporting this universal production scenario are remarkably significant, as shown by a new analysis approach, unbiased by specific theoretical calculations of partonic cross sections, which are only considered a posteriori, in comparisons with the data-driven results.

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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