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arXiv 1709.10491hep-ph
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HEFT的电弱共振

Electroweak resonances in HEFT

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

摘要:

由于100 GeV尺度与新物理之间的差距,对电弱对称性破缺扇区(W_L,Z_L和h)的粒子采用有效的单圈拉格朗日量(HEFT)是很自然的。为了描述在大型强子对撞机上可能发现的任何新粒子和共振,我们使用了它的么正化振幅,即使在新的强相互作用存在的情况下也是有效的。我们通过比较几种这样的方法来评估系统学,发现它们给出了定性相似的结果,并成功地在非微扰制度中产生酉振幅。因此,我们可以在0.5TeV-3 TeV(我们的近似的有效区域:有效理论和用电弱对称破缺的Goldstone玻色子代替W_L,Z_L的等价定理)描述新的物理。例如,我们还计算了EWSBS与顶-反顶和双光子通道的耦合,以描述通过它们衰减的共振或研究它们的光子-光子产生。该方法对低能下的许多BSM理论都是通用的和有用的。

英文摘要:

Due to the gap between the known 100 GeV scale and new physics if any, it is natural to employ an effective one-loop Lagrangian (HEFT) for the particles of the Electroweak Symmetry Breaking Sector (W_L, Z_L and h). To describe any new particles and resonances that may be found at the LHC we employ its unitarized amplitudes, valid even in the presence of new strong interactions. We have assessed the systematics by comparing several such methods, and find that they give qualitatively similar results and succesfully produce unitary amplitudes in the nonperturbative regime. We are thus in a position to describe new physics in the 0.5 TeV-3 TeV (region of validity of our approximations: the effective theory and the equivalence theorem to substitute W_L, Z_L by the Goldstone bosons of electroweak symmetry breaking). We have also computed the coupling of the EWSBS to the top-antitop and two-photon channels to describe resonances that decay through them or to study their photon-photon production, for example. The approach is universal and useful for many BSM theories at low energy.

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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