Bounding W-W' mixing with spin asymmetries at RHIC

Abstract

The W boson can obtain a small right-handed coupling to quarks and leptons through mixing with a hypothetical W' boson that appears in many extensions of the Standard Model. Measuring or even bounding this coupling to the light quarks is very challenging. Only one model independent bound on the absolute value of the complex mixing parameter has been obtained to date. Here we discuss a method sensitive to both the real and CP-violating imaginary parts of the coupling, independent of assumptions on the new physics, and demonstrate quantitatively the feasibility of its measurement at RHIC.

4 pages, 2 eps figures, minor modifications, mainly in the introduction, table 1 and figure 2, conclusions unchanged, version accepted for publication in Physical Review Letters

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Cited by in corpus (4)

• Transverse spin asymmetries for W-production in proton-proton collisions
• Double Sivers effect asymmetries and their impact on transversity measurements at RHIC
• Positivity bounds for Sivers functions
• About heavy neutrinos: Lepton-flavor violation in decays of charged leptons