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.