论文标题
LHC上外来自旋2搜索的精确QCD现象学
Precision QCD phenomenology of exotic spin-2 search at the LHC
论文作者
论文摘要
已经研究了与近代到接头对数（NNLL）相匹配的完整近临界领先顺序（NNLO）QCD校正（NNLL）通过大型强子对撞机（LHC）的Spin-2粒子进行了DRELL-YAN的研究。我们认为，通用的自旋2粒子与夸克和胶子（非宇宙场景）不同。阈值增强的分析系数已获得高达三阶，从而利用软函数的普遍性以及相同阶的过程依赖性形式。我们进行了详细的现象学分析，并为13 TEV LHC提供了预测，以搜索此类BSM签名。我们发现，在二阶处进行匹配的校正可在Lepton对的各种不变质量范围内进行相当大的校正。量表变化也可以在此顺序稳定下来，并减少到4％。作为副产品，我们还提供了三阶软文（SV）预测以及重新召集并研究对LHC搜索的影响的成分。
The complete next-to-next-to leading order (NNLO) QCD correction matched with next-to-next-to leading logarithm (NNLL) has been studied for Drell-Yan production through spin-2 particle at the Large hadron collider (LHC). We consider generic spin-2 particle which couples differently to the quarks and the gluons (non-universal scenario). The threshold enhanced analytical coefficient has been obtained up to third order exploiting the universality of the soft function as well as the process dependent form factors at the same order. We performed a detailed phenomenological analysis and give prediction for the 13 TeV LHC for the search of such BSM signature. We found that the matched correction at the second order gives sizeable corrections over wide range of invariant mass of the lepton pair. The scale variation also stabilizes at this order and reduces to 4%. As a by-product we also provide ingredients for third order soft-virtual (SV) prediction as well as resummation and study the impact on LHC searches.
