A
bstract
The time-dependent
CP
asymmetry in
B
0
→
K
res
γ → π
+
π
−
K
S
γ is sensitive to the photon polarisation in the quark level process
b
→
s
γ. While this polarisation is predominantly ...left-handed in the standard model, it could be modified by the existence of new physics contributions that may possess different
CP
properties. In this paper, we derive the
CP
violation formulae for
B
0
→
K
res
γ → π
+
π
−
K
S
γ including the most dominant intermediate states. We propose a new observable that could be measured in a time-dependent amplitude analysis of
B
0
→ π
+
π
−
K
S
γ decays, providing a stringent contraint on the photon polarisation. We discuss the future prospects for obtaining such constraints from measurements at Belle II and LHCb.
Abstract The time-dependent CP asymmetry in B 0 → K resγ → π+π− K Sγ is sensitive to the photon polarisation in the quark level process b → sγ. While this polarisation is predominantly left-handed in ...the standard model, it could be modified by the existence of new physics contributions that may possess different CP properties. In this paper, we derive the CP violation formulae for B 0 → K resγ → π+π− K Sγ including the most dominant intermediate states. We propose a new observable that could be measured in a time-dependent amplitude analysis of B 0 → π+π− K Sγ decays, providing a stringent contraint on the photon polarisation. We discuss the future prospects for obtaining such constraints from measurements at Belle II and LHCb.
The time-dependent CP asymmetry in B0 → Kresγ → π+π−KSγ is sensitive to the photon polarisation in the quark level process b → sγ. While this polarisation is predominantly left-handed in the standard ...model, it could be modified by the existence of new physics contributions that may possess different CP properties. In this paper, we derive the CP violation formulae for B0 → Kresγ → π+π−KSγ including the most dominant intermediate states. We propose a new observable that could be measured in a time-dependent amplitude analysis of B0 → π+π−KSγ decays, providing a stringent contraint on the photon polarisation. We discuss the future prospects for obtaining such constraints from measurements at Belle II and LHCb.
We present a possible supersymmetric solution to the discrepancy between the observed mixing CP asymmetries in B-->phiK(S) and B-->eta(')K(S). We show that, due to the different parity in the final ...states of these processes, their supersymmetric contributions from the R sector have opposite signs, which naturally leads to S(phiK(S)) not equal Seta(')(K(S)). We also consider the proposed mechanisms to solve the puzzle of the observed large branching ratio of B-->eta'K and their impact on Seta(')(K(S)).
PDF
