利用$Z$极化参数约束反常$ZH$耦合

Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-22 DOI:10.22323/1.390.0277

P. Sarmah, K. Rao, S. Rindani

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引用次数: 0

摘要

我们研究了异常ZZH顶点对LHC和未来的e+e−对撞机的higgstrastralung过程的贡献，使用Z的极化作为探针。利用自旋密度矩阵公式计算了Z玻色子的8个独立极化参数。我们利用Z衰变轻子的角不对称性估计了异常ZZH耦合的1σ极限，这些角不对称性与8个极化参数简单相关。我们讨论了两种可能的能量(√s =) 250 GeV和500 GeV的e+e -对撞机，以及可能的极化e+e -光束，b)√s = 14 TeV的LHC的结果。

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Constraining anomalous $ZH$ couplings using $Z$ polarization parameters

We study the anomalous ZZH vertex contributing to the Higgsstrahlung process at the LHC and future e+e− colliders using the polarization of the Z as a probe. We calculate the eight independent polarization parameters of the Z boson by using the spin density matrix formalism. We estimate 1σ limits on the anomalous ZZH couplings using the angular asymmetries of leptons from Z decay which are simply related to the eight polarization parameters. We discuss the results for a) two possible c.m.energies ( √ s =) 250 GeV and 500 GeV for the e+e− colliders, with the possibility of polarized e+e− beams, b) LHC at √ s = 14 TeV.

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Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)

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