Update of the Unitarity Triangle Analysis

TL;DR

This paper updates the Unitarity Triangle Analysis with recent experimental data, revealing slight tensions within the Standard Model and confirming a potential New Physics effect in B_s-ar B_s mixing at 2.9 sigma significance.

Contribution

It provides the latest status of the Unitarity Triangle Analysis, incorporating new measurements and exploring possible New Physics effects beyond the Standard Model.

Findings

Slight tensions in BR(B -> tau nu), sin(2 beta), and epsilon_K within the SM.

Confirmation of a 2.9 sigma hint of New Physics in B_s-ar B_s mixing.

Updated constraints and implications for New Physics models.

Abstract

We present the status of the Unitarity Triangle Analysis (UTA), within the Standard Model (SM) and beyond, with experimental and theoretical inputs updated for the ICHEP 2010 conference. Within the SM, we find that the general consistency among all the constraints leaves space only to some tension (between the UTA prediction and the experimental measurement) in BR(B -> tau nu), sin(2 beta) and epsilon_K. In the UTA beyond the SM, we allow for New Physics (NP) effects in (Delta F)=2 processes. The hint of NP at the 2.9 sigma level in the B_s-\bar B_s mixing turns out to be confirmed by the present update, which includes the new D0 result on the dimuon charge asymmetry but not the new CDF measurement of phi_s, being the likelihood not yet released.