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arXiv 1609.06206hep-ph
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在TeV区域中将WW、ZZ归一化振幅与$γγ$耦合

Coupling WW, ZZ unitarized amplitudes to $γγ$ in the TeV region

Rafael L. Delgado, Antonio Dobado, Felipe J. Llanes-Estrada

摘要:

我们定义和计算螺旋度分波振幅的过程连接电弱对称性破缺部门(EWSBS)的$γγ$,采用(NLO)的Higgs-EFT(HEFT)扩展的标准模型和等价定理,而忽略所有粒子的质量。所得到的振幅在能量状态($500\,{\rm GeV}-3\,{\rm TeV}$)中可能是有用的。我们还处理它们的么正化,使共振的EWSBS可以同时描述在$γγ$的初始或最终状态。我们得到的振幅满足么正性,微扰在$α$,但对所有的$s$值。通过这种方式,我们改进了随着$s$的增长相互作用变得更强而失败的HEFT,并为动态生成的共振衰减为$WW$,$ZZ$和$γγ$对提供了一个自然的框架。

英文摘要:

We define and calculate helicity partial-wave amplitudes for processes linking the Electroweak Symmetry Breaking Sector (EWSBS) to $γγ$, employing (to NLO) the Higgs-EFT (HEFT) extension of the Standard Model and the Equivalence Theorem, while neglecting all particle masses. The resulting amplitudes can be useful in the energy regime ($500\,{\rm GeV}-3\,{\rm TeV}$). We also deal with their unitarization so that resonances of the EWSBS can simultaneously be described in the $γγ$ initial or final states. Our resulting amplitudes satisfy unitarity, perturbatively in $α$, but for all $s$ values. In this way we improve on the HEFT that fails as interactions become stronger with growing $s$ and provide a natural framework for the decay of dynamically generated resonances into $WW$, $ZZ$ and $γγ$ pairs.

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