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arXiv 0810.3664hep-ph
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用Gfitter拟合电弱标准模型及其他模型

Fits of the Electroweak Standard Model and Beyond using Gfitter

Johannes Haller

摘要:

全球拟合的标准模型,以电弱精密数据,例行执行的LEP电弱工作组和其他人,已被重新审视的观点(一)的发展,新的通用拟合包,Gfitter,(二)插入的限制,从直接希格斯搜索在LEP和Tevatron,和(iii)更彻底的统计解释的结果。本文介绍了Gfitter项目,并提出了国家的最先进的结果,全球电弱适合在标准模型,并与扩展希格斯部门的模型。实例结果是对希格斯玻色子质量的估计(M_H = 116.4^{+18.3}_{-1.3} GeV)和强耦合强度的四阶结果(α_S(M_Z^2)= 0.1193^{+0.0028}_{-0.0027}(exp)+/-0.0001(theo))。使用Monte Carlo技术确定SM的p值(p=0.22)。作为一个新物理模型的例子,我们利用B和K物理扇区的观测量导出了II型双希格斯模型的约束条件。

英文摘要:

The global fit of the Standard Model to electroweak precision data, routinely performed by the LEP electroweak working groups and others, has been revisited in view of (i) the development of the new generic fitting package, Gfitter, (ii) the insertion of constraints from direct Higgs searches at LEP and Tevatron, and (iii) a more thorough statistical interpretation of the results. This paper describes the Gfitter project, and presents state-of-the-art results for the global electroweak fit in the Standard Model, and for a model with an extended Higgs sector. Example results are an estimation of the mass of the Higgs boson (M_H = 116.4^{+18.3}_{-1.3} GeV) and a forth-order result for the strong coupling strength (alpha_S(M_Z^2) = 0.1193^{+0.0028}_{-0.0027}(exp)+/-0.0001(theo)). Using toy Monte Carlo techniques the p-value of the SM has been determined (p=0.22). As an example of a New Physics model constraints are derived for the Two Higgs Doublet Model of Type-II using observables from the B and K physics sectors.

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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