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From: Pierre Artoisenet partois@nikhef.nl Date: November 29, 2012 1:48:58 PM GMT+01:00 To: theory-wide@nikhef.nl Subject: [Theory-wide] Nikhef theory seminar in 10 minutes

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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