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Among the $Z$-pole observables, $A_{FB}^{(0,b)}$ and $A_e$ suffer moderately-large standard deviations from the Standard Model predictions. Fine-tuning of the unknown Higgs mass only reduces the deviation of one of them at the expense of…

High Energy Physics - Phenomenology · Physics 2015-06-05 Ying Zhang , Shao-Zhou Jiang , Qing Wang

High precision measurements of electroweak observables at $e^\pm$ colliders indicate the existence of a light Higgs boson below the $W^\pm$ threshold. If such a fundamental scalar should be found in the near future it is important to fully…

High Energy Physics - Phenomenology · Physics 2008-11-26 Michael Melles

The W Mass determination at the Tevatron CDF experiment reported a deviation from the SM expectation at 7$\sigma$ level. We discuss a few possible interpretations and their collider implications. We perform electroweak global fits under…

High Energy Physics - Phenomenology · Physics 2022-12-07 Jiayin Gu , Zhen Liu , Teng Ma , Jing Shu

In this review, we discuss methods of parsing direct and indirect information from collider experiments regarding the Higgs boson and describe simple ways in which experimental likelihoods can be consistently reconstructed and interfaced…

High Energy Physics - Phenomenology · Physics 2013-03-20 Aleksandr Azatov , Jamison Galloway

Recent electroweak precision measurements from e+e- and pbarp colliders are presented. Some emphasis is placed on the recent developments in the heavy flavor sector. The measurements are compared to predictions from the Standard Model of…

High Energy Physics - Experiment · Physics 2007-05-23 Marcel Demarteau

Higher-order results for electroweak precision observables in the Standard Model are analyzed in view of the experimental accuracies achievable at the present and the next generation of colliders, and the indirect prediction of the…

High Energy Physics - Phenomenology · Physics 2009-10-31 S. Heinemeyer , G. Weiglein

An update of the electroweak measurements at LEP and SLC is presented. These measurements are used to perform precise tests of the Standard Model. A constraint on the Standard Model Higgs mass is obtained when the direct measurements of…

High Energy Physics - Experiment · Physics 2007-05-23 E. Tournefier

We update our previous work on an analysis of the electroweak data by including new and partly preliminary data available up to the 1996 summer conferences. The new results on the Z partial decay widths into b and c hadrons now offer a…

High Energy Physics - Phenomenology · Physics 2008-11-26 Kaoru Hagiwara , Dieter Haidt , Seiji Matsumoto

Results from the global Standard Model fit to electroweak precision data, including newest Tevatron measurements, are reviewed and discussed. The complete fit using also the constraints from the direct Higgs boson searches yields an upper…

High Energy Physics - Phenomenology · Physics 2014-11-20 Andreas Hoecker

We compute the leading corrections to the properties of W and Z bosons induced at the one-loop level in the SU(5)/SO(5) Littlest Higgs model with T parity, and perform a global fit to precision electroweak data to determine the constraints…

High Energy Physics - Phenomenology · Physics 2009-11-11 Jay Hubisz , Patrick Meade , Andrew Noble , Maxim Perelstein

The Standard Model global fit to precision data is excellent. The Minimal Supersymmetric Standard Model can also fit the data well, though not as well as the Standard Model. At best, supersymmetric contributions either decouple or only…

High Energy Physics - Phenomenology · Physics 2009-10-31 Jens Erler , Damien M. Pierce

We present a new global fit to precision electroweak data, including new low- and high-energy data and analyzing the radiative corrections arising from the minimal symmetry breaking sectors of the Standard Model (SM) and its supersymmetric…

High Energy Physics - Phenomenology · Physics 2009-09-11 John Ellis , G. L Fogli , E. Lisi

We revisit the global fit to electroweak precision observables in the Standard Model and present model-independent bounds on several general new physics scenarios. We present a projection of the fit based on the expected experimental…

High Energy Physics - Phenomenology · Physics 2017-02-28 Jorge de Blas , Marco Ciuchini , Enrico Franco , Satoshi Mishima , Maurizio Pierini , Laura Reina , Luca Silvestrini

We have examined the electroweak radiative corrections in the LEP precision data in view of the new measurements of $M_W$ and $m_t$ as well as the recent progress in the higher order radiative corrections. From the minimal $\chi^2$-fit to…

High Energy Physics - Phenomenology · Physics 2007-05-23 Kyungsik Kang , Sin Kyu Kang

The electroweak corrections of order ${\cal O}(\alpha_{\rm em} m^2_{t,b}/m^2_w)$ and ${\cal O}(\alpha_{\rm em} m^3_{t,b}/m^3_w)$ to Higgs boson associated production with top quark pair are calculated at $e^+e^-$ colliders in the standard…

High Energy Physics - Phenomenology · Physics 2007-05-23 Xiao-Hong Wu , Chong Sheng Li , Jian Jun Liu

We develop a general set of methods for computing the oblique electroweak parameters S and T for bottom-up and top-down motivated scenarios in which the Higgs weakly mixes with a superconformal extra sector. In addition to their utility in…

High Energy Physics - Theory · Physics 2013-09-18 Jonathan J. Heckman , Piyush Kumar , Brian Wecht

We present results from a state-of-the-art fit of electroweak precision observables and Higgs-boson signal-strength measurements performed using 7 and 8 TeV data from the Large Hadron Collider. Based on the HEPfit package, our study updates…

High Energy Physics - Phenomenology · Physics 2025-02-05 Jorge de Blas , Marco Ciuchini , Enrico Franco , Satoshi Mishima , Maurizio Pierini , Laura Reina , Luca Silvestrini

We discuss the experimental and theoretical uncertainties on precision electroweak observables and their relationship to the indirect constraints on the Higgs-boson mass, $\MH$, in the Standard Model (SM). The critical experimental…

We present the results of a first global fit to the electroweak observables in the MSSM. The best fit selects either very low or very large values of ~$\tan\beta$ ~and, correspondingly, chargino (higgsino--like) and stop or the ~$CP-$odd…

High Energy Physics - Phenomenology · Physics 2009-10-28 P. H. Chankowski , S. Pokorski

I summarize recent developments in electroweak precision physics and global fits. Expectations for future measurements, both at lower energies and the energy frontier, are also discussed.

High Energy Physics - Phenomenology · Physics 2021-05-05 Jens Erler