منابع مشابه
A More Precise Higgs Boson Mass
A great insight of twentieth-century science is that symmetries expressed in the laws of nature need not be manifest in the outcomes of those laws. Consider the snowflake. Its structure is a consequence of electromagnetic interactions, which are identical from any direction, but a snowflake only looks the same when rotated by multiples of 60◦ about a single axis. The full symmetry is hidden by ...
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Recent experimental and theoretical progress in the MH estimates from MW and sin θ eff is reviewed, with particular emphasis on the role played by Mt. Assuming that the SM is correct and taking into account the lower bound on MH from direct searches, we derive restrictive bounds on MW and Mt. We also discuss a representative “benchmark” scenario for the possible future evolution of these parame...
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Supersymmetric extensions of the Standard Model generally give a theoretical upper limit on the lightest Higgs boson mass which may be uncomfortably close to the current experimental lower bound of mh > 114 GeV. Here we show ways in which this upper limit on mh can be relaxed substantially in the perturbative regime, while maintaining the successful unification of gauge couplings as observed in...
متن کاملBounds on the Standard Higgs Boson
We review the status of precision electroweak physics with particular emphasis on the extraction of the Higgs boson mass. Global fit results depend strongly on the used value for the hadronic contribution to α(MZ). We emphasize, however, that the general tendency for a light Higgs persists when using any of the recently obtained values for α(MZ), and is also less dependent on deviating observab...
متن کاملMass bounds of the lightest CP-even Higgs boson in the two-Higgs-doublet model
The upper and the lower bounds of the lightest CP-even Higgs-boson mass (mh) are discussed in the two-Higgs-doublet model (2HDM) with a softly-broken discrete symmetry. They are obtained as a function of a cut-off scale Λ (≤ 10 GeV) by imposing the conditions in which the running coupling constants neither blow up nor fall down below Λ. In comparison with the standard model (SM), although the u...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2005
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.72.096003