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arXiv 1901.03061hep-ph
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强子对撞机上类轴子粒子的新探测

New Probes for Axion-like Particles at Hadron Colliders

Javad Ebadi, Sara Khatibi, Mojtaba Mohammadi Najafabadi

摘要:

在标准模型的许多扩展中,类轴子粒子(ALP)都是由自发的全局对称性破缺产生的。在本文中,我们发现ALP($a$)模型参数的界限在大型强子对撞机从ALP产生与一个光子和喷流($j+γ+a$)以及单顶和顶夸克对($t+j+a$,$t\bar{t}+a$)在一个独立的方法。特别是,它示出的ALP生产与光子加喷流在大型强子对撞机是一个有前途的通道,具有显着的灵敏度探测ALP耦合到胶子和电弱规范玻色子。在高亮度LHC的前景,包括一个现实的探测器模拟和堆积效应。此外,ALP模型的检查,通过其贡献的顶夸克(色)磁偶极矩。结果表明,顶夸克磁偶极矩和色磁偶极矩使我们能够同时探测ALP与顶夸克和规范玻色子的耦合。的约束是互补的,从直接搜索获得的,因为它们是敏感的光ALP。

英文摘要:

Axion-like particles (ALPs) appear from spontaneous global symmetry breaking in many extensions of the Standard Model (SM). In this paper, we find bounds on ALP ($a$) model parameters at the LHC from the ALP production associated with a photon and a jet ($j+γ+a$) as well as single top and top quark pairs ($t+j+a$, $t\bar{t}+a$) in a model independent approach. In particular, it is shown that the ALP production associated with a photon plus a jet at the LHC is a promising channel with significant sensitivity to probe the ALP couplings to gluons and electroweak gauge bosons. The prospects are presented at the High Luminosity LHC including a realistic detector simulation and pile up effects. Furthermore, the ALP model is examined through its contributions to the top quark (chromo)magnetic dipole moments. It is shown that the top quark magnetic and chromomagnetic dipole moments enable us to probe the ALP couplings to top quark and gauge bosons at a time. The constraints are complementary to those obtained from direct searches, as they are sensitive to light ALPs.

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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