Electroweak precision observables, new physics and the nature of a 126 GeV Higgs boson

被引：137

作者：

Ciuchini, Marco ^{[1
]}

Franco, Enrico ^{[2
]}

Mishima, Satoshi ^{[2
,3
]}

Silvestrini, Luca ^{[2
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Roma Tre, I-00146 Rome, Italy

[2] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2013年 / 08期

基金：

欧洲研究理事会;

关键词：

LEP HERA and SLC Physics; Beyond Standard Model; Quark Masses and SM Parameters; Standard Model; VACUUM-POLARIZATION FUNCTIONS; SPIN-1/2 FERMION SCATTERING; HEAVY TOP CORRECTIONS; RADIATIVE-CORRECTIONS; STANDARD-MODEL; SEMIANALYTICAL PROGRAM; 2-LOOP CORRECTIONS; PAIR PRODUCTION; NEUTRAL-CURRENT; MUON LIFETIME;

D O I：

10.1007/JHEP08(2013)106

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We perform the fit of electroweak precision observables within the Standard Model with a 126 GeV Higgs boson, compare the results with the theoretical predictions and discuss the impact of recent experimental and theoretical improvements. We introduce New Physics contributions in a model-independent way and fit for the S, T and U parameters, for the epsilon(1,2,3,b) ones, for modified Zb (b) over bar couplings and for a modified Higgs coupling to vector bosons. We point out that composite Higgs models are very strongly constrained. Finally, we compute the bounds on dimension-six operators relevant for the electroweak fit.

引用

页数：45

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