Low-Energy Measurements of the Weak Mixing Angle

Abstract

We review the status of precision measurements of weak neutral current interactions, mediated arXiv:1302.6263v2 [hep-ex]

Round Table: Resolving Physics BSM at Low Energies

“…These facilities cover new beams and sources for slow or ultracold neutrons, respectively (FRMII (Munich), PSI, ILL, TRIUMF, SNS...), new very high intensity muon beams (PSI, JPARC, Osaka...), and new beams of kaons and sources for B and D-meson production or electron machines for dark photon searches. The latter are also used to search for new physics through precision measurements of parity-violating electron scattering [56]. New technologies and experimental schemes are being developed to address many of the relevant questions and to push the precision to the frontier desired.…”

Electroweak and BSM Physics at the EIC

“…Over the past two decades, the C 1i 's have been measured with steadily improving precision in table-top atomic parity violation experiments and in fixed target parityviolating electron scattering experiments, both in elastic scattering and deep inelastic scattering (DIS), most recently at Jefferson Laboratory (JLab) [1,2]. Comparing these measurements to SM predictions has produced strong constraints on new high energy dynamics, such as limits on TeV-scale heavy Z' bosons and certain classes of interactions in supersymmetric theories, in a manner complementary to direct searches at colliders [3][4][5][6].…”

Study of the hadronic contributions to the running of the QED coupling and the weak mixing angle

“…On the other hand, such a flavour separation is naturally provided by a lattice QCD calculation. The hadronic contribution to the running of the weak mixing angle, ∆ had sin 2 θ W (Q 2 ), can then be related to ∆α had QED (Q 2 ) once an independent input for the value of the SU(2) L coupling α 2 at Q 2 = 0 is employed [16].…”