Dear all,
We have a theory seminar in 10 minutes (room H331).
See you there.
Pierre
Speaker: Sebastian Jaeger
Title:
B->Vll at small dilepton invariant mass, power corrections, and new physics
Astract:
Rare B decays provide powerful probes of new degrees of freedom at the TeV
scale and beyond. I will review the basic theory of B decays, and then in
more detail the helicity structure of the rare semileptonic decays B->V l l.
In particular, I will present new work on controlling long-distance charm and
light quark loop effects. Our treatment is more conservative and robust than
the prevailing procedure based on QCD factorization alone; nevertheless we
find that a certain helicity hierarchy survives and implies that two
observables constructed from the angular distribution remain theoretically
extremely clean. We also find that this is true all the way down to the
endpoint of the dilepton invariant mass spectrum. I discuss the excellent
sensitivity to right-handed currents that this implies.
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