July 28, 2020 to August 6, 2020
virtual conference
Europe/Prague timezone

Discriminating new physics scenarios in $b\rightarrow s\,\mu^+\,\mu^-$ via transverse polarization asymmetry of $K^*$ in $B\rightarrow K^*\,\mu^+\,\mu^-$ decay

Jul 29, 2020, 1:39 PM
virtual conference

virtual conference

Poster 05. Quark and Lepton Flavour Physics Quark and Lepton Flavour Physics - Posters


Suman Kumbhakar (IIT Bombay)


A global fit to current $b\rightarrow s\,l^+\,l^-$ data suggest several new physics solutions. Considering only one operator at a time and new physics in the muon sector, it has been shown that the new physics scenarios (I) $C_9^{\rm NP}<0$, (II) $C_{9}^{\rm NP} = -C_{10}^{\rm NP}$, (III) $C_9^{\rm NP} = -C_9^{\rm 'NP}$ can account for all data in this sector. In order to discriminate between these scenarios one needs to have a handle on additional observables in $b \to s \, \mu^+ \, \mu^-$ sector. In this work we study transverse polarization
asymmetry of $K^*$ polarization in $B\rightarrow K^*\,\mu^+\,\mu^-$ decay, $A_T$, to explore such a possibility. We show that $A_T$ is a good discriminant of all the three scenarios. The measurement of this asymmetry with a percent accuracy can confirm which new physics scenario is the true solution, at better than 3$\sigma$ C.L.

Primary authors

Suman Kumbhakar (IIT Bombay) Sankagiri Umasankar (IIT Bombay) Ashutosh Alok (IIT Jodhpur)

Presentation materials