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arXiv 2010.08271hep-ph
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用电弱有效理论约束共振

Constraining resonances by using the electroweak effective theory

Ignasi Rosell, Antonio Pich, Juan José Sanz-Cillero

摘要:

考虑到标准模型态和可能的新粒子之间的质量差,有效场论是一种合适的方法。我们采用了电弱对称破缺的非线性实现:电弱有效理论(EWET),也称为希格斯有效场论(HEFT)或电弱手征拉格朗日(EWChL)。在更高的尺度上,我们考虑共振电弱拉格朗日,耦合SM场共振。积分这些共振,并假设一个行为良好的高能行为,一些玻色子的低能常数确定或限制的共振质量。目前这些低能量常数的实验界限,使我们能够推动共振质量尺度的TeV范围内,$M_R \geq 2\,$ TeV,与以前的估计很好地吻合。

英文摘要:

In the light of the mass gap between Standard Model (SM) states and possible new particles, effective field theories are a suitable approach. We take on the non-linear realization of the electroweak symmetry breaking: the electroweak effective theory (EWET), also known as Higgs effective field theory (HEFT) or electroweak chiral Lagrangian (EWChL). At higher scales we consider a resonance electroweak Lagrangian, coupling SM fields to resonances. Integrating out these resonances and assuming a well-behaved high-energy behavior, some of the bosonic low-energy constants are determined or constrained in terms of resonance masses. Present experimental bounds on these low-energy constants allow us to push the resonance mass scale to the TeV range, $M_R \geq 2\,$TeV, in good agreement with previous estimations.

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