Conference on Flavor Physics and CP Violation (FPCP 2019)

Name: Conference on Flavor Physics and CP Violation (FPCP 2019)
Start: 2019-05-06T08:30:00-07:00
End: 2019-05-10T13:25:00-07:00
Location: No location set

6–10 May 2019

Canada/Pacific timezone

New Physics in $b \to c τ ν$ : Impact of Polarisation Observables and $B_{c} \to τ ν$

7 May 2019, 16:15

15m

Elliott 162

Contributed Oral Heavy Quark Decays and CKM Metrology Parallel session 2

Marta Moscati (Karlsruhe Institute of Technology (KIT))

In this talk I review the status of new physics in

b \to c τ ν

transitions in the EFT framework of dimension-six operators. The fit results, including the recent measurement of

F_{L} (D^{*})

, are presented for all one- and two-dimensional scenarios resulting from the tree level exchange of a single new particle. Particular emphasis is put on the constraint from the

B_{c} \to τ ν

decay rate. I introduce a sum rule for the branching ratios of

B \to D τ ν

B \to D^{*} τ ν

and

Λ_{b} \to Λ_{c} τ ν

which holds for any NP contribution to the Wilson coefficients and predicts an enhancement of the latter decay w.r.t. the Standard Model. I discuss correlations between the polarisation observables in

B \to D τ ν

B \to D^{*} τ ν

and their model-discriminating prospects. The talk is based on the results published in https://arxiv.org/abs/1811.09603.

Email	marta.moscati@kit.edu

Marta Moscati (Karlsruhe Institute of Technology (KIT))

Slides

moscati.pdf

Conference on Flavor Physics and CP Violation (FPCP 2019)

New Physics in $b \to c τ ν$ : Impact of Polarisation Observables and $B_{c} \to τ ν$

Elliott 162

Speaker

Description

Primary author

Presentation materials