Angular analysis of the decay B->K*mumu and studies of mixing and CP-violation in the BS0 system with the ATLAS detector

Understand

The measurement of B meson decay properties provides an alternative approach for searches for physics beyond the Standard Model.

• We present two different measurements performed with data taken in 2011 with the ATLAS detector at the Large Hadron collider.
• The first measurement is based on an angular analysis of the decay B->K*mumu, and in the second measurement the decay width difference delta_Gamma_S and the weak phase phi_s of the Bs0 system is determined using the decay Bs->JPsiPhi.
• For the second measurement a probability for the flavour quantum number of the b_quark at production time is determined.