Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

New physics sensitivity of the rare decay mode $B \to K^0 \ell^-\ ell^+$

Jul 17, 2009, 9:30 AM
Large (Kraków, Poland)


Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Flavour Physics II. Flavour Physics


Dr Tobias Hurth (CERN)


We design new observables available from the angular distributions of the decay $B \to K^0 ell^- ell^+$ with high sensitivity to specific new phsyics operators. We present a NLO analysis of all observables based on the QCD factorization approach in the low-dilepton mass region and make the uncertaintities due to the $\Lambda/m_b$ corrections manifest and finally analyse the sensitivity of the new observables to new physics. We explore the experimental sensitivities at LHCb and SuperLHCb based on a full-angular fit method. We also show that the previously discussed transversity amplitude $AT_1$ cannot be measured at the LHCb experiment or at future $B$ factory experiments as it requires a measurement of the spin of the final state particles. We also analyse CP violating observables in this decay mode and critically discuss their sensitivity to new physics.

Primary author

Dr Tobias Hurth (CERN)


Dr Joaquim Matias (Universitat Autonoma de Barcelona) Mr Marc Ramon (Universitat Autonoma de Barcelona) Dr Ulrik Egede (Imperial College, LHCb) Mr Will Reece (Imperial College, LHCb)

Presentation materials