arXiv 1601.071672016-01hep-phhep-th

环中Kaluza-Klein轻子介导的750 GeV双光子共振的光产生

Photo-production of a 750 GeV di-photon resonance mediated by Kaluza-Klein leptons in the loop

Steven Abel, Valentin V. Khoze

备注：: New section discussing constraints from perturbativity; references added; matches the journal version; 23 pages, 3 figures

摘要：

我们考虑的现象，750 GeV的共振X，可以在大型强子对撞机产生的光子聚变，随后衰变成双光子。我们提出，自旋为零的X态耦合到一个重轻子，它生活在高维理论的大部分中，只与标准模型的光子相互作用。我们计算了这些模型中的双光子率与两个和更多的紧凑的额外的维度，并证明他们允许一个令人信服的解释最近观察到的双光子过剩的ATLAS和CMS合作。在我们的方法中的核心作用是发挥的卡鲁扎-克莱因模式的新轻子的总和，从而提供了一个显着的增强的$X\to γγ$循环的生产和衰变子过程。预计伴随这些纯电磁（在部分子水平）过程的喷流活动在数值上被诸如$α_{em}^2 C_{q\bar{q}}/C_{γγ}\sim 10^{-3}$之类的因素抑制。

英文摘要：

We consider the phenomenology of a 750 GeV resonance X which can be produced at the LHC by only photon fusion and subsequently decay into di-photons. We propose that the spin-zero state X is coupled to a heavy lepton that lives in the bulk of a higher-dimensional theory and interacts only with the photons of the Standard Model. We compute the di-photon rate in these models with two and more compact extra dimensions and demonstrate that they allow for a compelling explanation of the di-photon excess recently observed by the ATLAS and CMS collaborations. The central role in our approach is played by the summation over the Kaluza-Klein modes of the new leptons, thus providing a significant enhancement of the $X\to γγ$ loops for the production and decay subprocesses. It is expected that the jet activity accompanying these purely electromagnetic (at the partonic level) processes is numerically suppressed by factors such as $α_{em}^2 C_{q\bar{q}}/C_{γγ}\sim 10^{-3}$.

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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英文摘要：

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