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arXiv 1202.3697hep-phhep-ex
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在LHC上对希格斯粒子嫌疑人进行指纹识别

Fingerprinting Higgs Suspects at the LHC

J. R. Espinosa, Christophe Grojean, M. Muhlleitner, Michael Trott

摘要:

我们概述了一种方法来表征偏离标准模型(SM)希格斯玻色子的属性。我们将其应用到当前的数据,以表征SM希格斯玻色子解释与实验一致的程度。根据CMS和ATLAS报道的与质量标度mh = 124-126 GeV有关的超额事件数据,以及已发表的CL_s排除区,我们发现SM希格斯玻色子玻色子在82%的置信水平上与现有的数据是一致的。我们进行了一个全球性的拟合的两个参数的偏差,从SM值的规范和费米子耦合的希格斯玻色子。我们发现两个最小值的全球拟合和识别观测,可以消除这种退化。附录中包含Moriond 2012年数据的更新,发现SM希格斯玻色子现在仅在94%置信水平下与当前数据集一致(与最佳拟合点相比,相当于约2 sigma张力)。

英文摘要:

We outline a method for characterizing deviations from the properties of a Standard Model (SM) Higgs boson. We apply it to current data in order to characterize up to which degree the SM Higgs boson interpretation is consistent with experiment. We find that the SM Higgs boson is consistent with the current data set at the 82 % confidence level, based on data of excess events reported by CMS and ATLAS, which are interpreted to be related to the mass scale mh = 124-126 GeV, and on published CL_s exclusion regions. We perform a global fit in terms of two parameters characterizing the deviation from the SM value in the gauge and fermion couplings of a Higgs boson. We find two minima in the global fit and identify observables that can remove this degeneracy. An update for Moriond 2012 data is included in the Appendix, which finds that the SM Higgs boson is now consistent with the current data set at only the 94 % confidence level (which corresponds to ~ 2 sigma tension compared to the best fit point).

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