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arXiv 1306.0006hep-phhep-ex
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标量玻色子耦合的鲁棒确定

Robust determination of the scalar boson couplings

Tyler Corbett, O. J. P. Eboli, J. Gonzalez-Fraile, M. C. Gonzalez-Garcia

摘要:

我们研究了新物理学对“希格斯”粒子现象学的间接影响。假设最近观察到的态属于轻的电弱偶标量,并且SU(2)_LxU(1)_Y对称性是线性实现的,我们用电弱标度下的有效拉格朗日量来参数化这些效应。我们选择的维-六算子的基础,使我们能够更好地利用所有可用的数据来约束系数的维六算子。我们执行一个全球性的6-参数拟合,允许同时确定的标准模型标量耦合胶子,电弱规范玻色子,底夸克,和τ轻子。结果基于Moriond 2013发布的数据。此外,我们的形式主义导致的电弱三重规范玻色子耦合的强约束。添加注释:该分析已使用新的全球6参数拟合进行更新,其中包含Moriond 2013年之后的所有公开数据。这一分析的最新情况以及手稿的新版本见http://hep.if.usp.br/Higgs网站。

英文摘要:

We study the indirect effects of new physics on the phenomenology of the "Higgs-like" particle. Assuming that the recently observed state belongs to a light electroweak doublet scalar and that the SU(2)_L x U(1)_Y symmetry is linearly realized, we parametrize these effects in terms of an effective Lagrangian at the electroweak scale. We choose the dimension--six operator basis which allows us to make better use of all the available data to constrain the coefficients of the dimension-six operators. We perform a global 6--parameter fit which allows simultaneous determination of the standard model scalar couplings to gluons, electroweak gauge bosons, bottom quarks, and tau leptons. The results are based on the data released at Moriond 2013. Moreover, our formalism leads to strong constraints on the electroweak triple gauge boson couplings. Note added: The analysis has been updated with a NEW GLOBAL 6-PARAMETER FIT with all the public data available after Moriond 2013. Updates of this analysis are provided at the website http://hep.if.usp.br/Higgs, as well as new versions of the manuscript.

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