WWγ production at hadron colliders with NLO QCD+EW corrections and parton shower effects

WWγ production at hadron colliders with NLO QCD+EW corrections and parton shower effects
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具有 NLO QCD EW 校正和帕顿簇射效应的强子对撞机的 $WWgamma$ 产量

DOI:
10.1088/1361-6471/ab7ff8
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发表时间:
2020-04
期刊:
Journal of Physics G: Nuclear and Particle Physics
影响因子:
--
通讯作者:
Yi Jiang
Yi Jiang
中科院分区:
其他
文献类型:
--
作者:
Jian-Wen Zhu;Ren-You Zhang;Wen-Gan Ma;Qiang Yang;Yi Jiang

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在质子-质子碰撞中产生的W^+W^-γ为研究弱电弱对称性破缺机制提供了一个窗口,并为三次和四次规范耦合提供了直接的评价。对规范玻色子自相互作用的精确研究也可能提供超越标准模型的新物理存在的证据。本文研究了大型强子对撞机和未来QCD+EW NLO高能质子-质子对撞机的W^+W^-伽马产生,包括部分子簇射效应。我们发现,由于光子光度可以随着碰撞能量的增加而显著增强,因此来自光子诱导(即$Q\伽马-和$\伽马\伽马发起)通道的贡献是不可忽略的,并且应用喷流否决事件选择方案可以充分地抑制较大的实际喷注发射QCD和EW修正。此外,我们还研究了由PDF不确定性和因式分解/重整化尺度依赖引起的理论误差。
$W^+W^-\gamma$ production in proton-proton collision provides a window to the mechanism of electroweak symmetry breaking and a direct accessment to triple and quartic gauge couplings. Precision study of gauge boson self-interactions may also provide evidence of existence of new physics beyond the Standard Model. In this paper, we study the $W^+W^-\gamma$ production at the LHC and future higher energy proton-proton colliders at the QCD+EW NLO including parton shower effects. We find that the contributions from the photon-induced (i.e., $q\gamma$- and $\gamma\gamma$-initiated) channels are non-negligible since the photon luminosity can be enhanced significantly with the increment of colliding energy, and the large real jet emission QCD and EW corrections can be depressed sufficiently by applying the jet veto event selection scheme. Moreover, we also investigate the theoretical errors arising from the PDF uncertainty and the factorization/renormalization scale dependence.
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