منابع مشابه
The Weak Mixing Angle at Low Energies
We determine the weak mixing angle in the MS-scheme, sin θ̂W (μ), at energy scales μ relevant for present and future low energy electroweak measurements. We relate the renormalization group evolution of sin θ̂W (μ) to the corresponding evolution of α̂(μ) and include higher-order terms in αs and α that had not been treated in previous analyses. We also up-date the analysis of non-perturbative, hadr...
متن کاملWeak mixing angle at low energies
1550-7998=20 We determine the weak mixing angle in the MS scheme, sin̂W , at energy scales relevant for present and future low-energy electroweak measurements. We relate the renormalization group evolution of sin̂W to the corresponding evolution of ̂ and include higher-order terms in s and that had not been treated in previous analyses. We also update the analysis of nonperturbative, hadronic c...
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In this paper, we review recent precise measurements of the weak mixing angle by the SLD experiment at SLC and by the ALEPH, DELPHI, L3, and OPAL experiments at LEP. If we assume that the Minimal Standard Model provides a complete description of the quark and lepton couplings to the 2 boson, we find sin’ 0% = 0.23143 f 0.00028. If this assumption is relaxed to apply to lepton couplings only, we...
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The E158 experiment at SLAC has made the first measurement of parity violation in electron-electron (Møller) scattering. We report a preliminary result using 50% of the accumulated data sample for the right-left parity-violating cross-section asymmetry (APV ) in the elastic scattering of 45 and 48 GeV polarized electron beams with unpolarized electrons in a liquid hydrogen target. We find APV =...
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In the Randall-Sundrum (RS) compactification, the gap between two branes is stabilized by the vacuum expectation value of a scalar field called radion, φ. This radion behaves like a weak interaction singlet scalar field, coupling to matter through the trace of the energy momentum tensor. We find that it can induce a sizable correction to the weak mixing angle if the vacuum expectation value and...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2005
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.72.073003