Theory Seminars

Parity doubling as a tool for right-handed current searches

by Roman Zwicky (University of Edinburgh)

Europe/Madrid
IFAE Seminar room (IFAE)

IFAE Seminar room

IFAE

Description
The V-A structure of the weak interactions leads to definite amplitude hierarchies in exclusive heavy-to-light decays mediated by b → (d, s)γ and b → (d, s)ll. However, the extraction of right-handed currents beyond the Standard Model is contaminated by V-A long-distance contributions leaking into right-handed amplitudes. I discuss how these quantum-number changing long-distance contributions can be controlled by considering the almost parity-degenerate vector meson final states. I will also talk about the chiral restoration limit from where these matters are best understood.
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