[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, September 11, 2017
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L102

Stefan Meinel
Arizona University

***Flavor Physics with Charm and Bottom Baryons*

** Studying flavor-changing processes involving charm and bottom quarks 
is a powerful way
of searching for new physics. Most of these efforts have focused on D 
and B mesons, but
charm and bottom baryons are now playing an increasingly important role. 
Measurements
of Lambda_b decays at the Large Hadron Collider can shed new light on 
"anomalies" observed
in mesonic b decays, including the V_{ub} puzzle and the recent hints 
for physics beyond the
Standard Model in b -> s l l and b -> c tau nu transitions. In this 
talk, I will review lattice QCD
calculations of the form factors describing weak decays of Lambda_b 
baryons, and discuss the
phenomenological implications. I will also present lattice QCD results 
for the charm-baryon
semileptonic decays Lambda_c -> Lambda l nu, whose branching fractions 
have recently been
measured precisely by the BESIII collaboration.
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