Aug 25 – 29, 2014
Schloss Waldthausen, Mainz, Germany
Europe/Berlin timezone

New ways to search for right-handed current in B -> ρ l ν

Aug 25, 2014, 2:00 PM
Schloss Waldthausen, Mainz, Germany

Schloss Waldthausen, Mainz, Germany

Heavy Quarks & Leptons CKM


Sascha Turczyk (University of Mainz)


An interesting possibility to ease the tension between various determinations of |Vub| allows a small right-handed contribution to the Standard Model weak current. The current bounds on such a contribution are fairly weak. We propose new ways to search for such a beyond Standard Model contribution in the semileptonic B -> ρ l ν decay. We suggest to use generalized asymmetries in one, two, or three angular variables as discriminators, which do not require measuring the fully differential distribution, and discuss its theoretical uncertainties. We discuss how binned measurements can access all the angular information, which may be more important for B -> ρ l ν than it is for B -> K* l+ l-. We explore the achievable sensitivity both from the available BaBar and Belle data sets, as well as from the anticipated 50 ab^-1 Belle II data.

Primary author

Sascha Turczyk (University of Mainz)


Florian Bernlochner (University of Victoria) Zoltan Ligeti (LBNL Berkeley)

Presentation materials