Weak mixing angle at low energies
نویسندگان
چکیده
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 contributions and argue that the associated uncertainty is small compared to anticipated experimental errors. The resulting value of the low-energy MS weak mixing angle is sin̂W 0 0:23867 0:00016.
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