Implications of the measurement of the B^0_s-\bar B^0_s mass difference

TL;DR

A strong correlation between S(psiphi) and ASL(s) is pointed out in a very broad class of new physics models, and could give further clues to the authors' understanding the flavor sector in the LHC era.

Abstract

We analyze the significant new model independent constraints on extensions of the standard model (SM) that follow from the recent measurements of the B^0_s-\bar B^0_s mass difference. The time-dependent CP asymmetry in B_s -> ψφ, S_{ψφ}, will be measured with good precision in the first year of LHC data taking, which will further constrain the parameter space of many extensions of the SM, in particular, next-to-minimal flavor violation. The CP asymmetry in semileptonic B_s decay, A_{SL}^s, is also important to constrain these frameworks, and could give further clues to our understanding the flavor sector in the LHC era. We point out a strong correlation between S_{ψφ} and A_{SL}^s in a very broad class of new physics models.

Figures (4)

• Figure 1: The allowed range for $h_s,\sigma_s$ using the data before (left) and after (right) the recent $\Delta m_s\xspace$ and $\Delta\Gamma_s$ measurements. For $\Delta m_s\xspace$ only the CDF result was used. The dark, medium, and light shaded areas have CL $>$ 0.90, 0.32, and 0.05, respectively.
• Figure 2: The allowed range for $h_s,\sigma_s$ using the 1 year LHCb projection, assuming the SM prediction as the central value.
• Figure 3: The current allowed range of $A_{\rm SL}^s$ as a function of $h_s$.
• Figure 4: The correlation between $A_{\rm SL}^s$ and $S_{\psi\phi}$.