Evidence for an anomalous like-sign dimuon charge asymmetry

Abstract

We present a measurement of the like-sign dimuon asymmetry in semileptonic $b$-hadron decays, performed using 6.1 fb${}^{-1}$ of $p\bar{p}$ collisions recorded with the D0 detector at a center-of-mass energy $\sqrt{s}=1.96$ TeV at the Fermilab Tevatron collider. This measured value is $A_{\mathrm{sl}}^b=[-0.957\pm 0.251(\mathrm{stat})\pm 0.146(\mathrm{syst})]$ %, which disagrees with the Standard Model prediction at a statistical level of 3.2 $\sigma$, and provides the first evidence of anomalous CP violation in the mixing of neutral $B$ mesons.

Presented at the Ninth International Conference on Flavor Physics and CP Violation (FPCP 2011), Maale Hachamisha, Israel, May 23-27, 2011

References in corpus (3)

• Anatomy and Phenomenology of FCNC and CPV Effects in SUSY Theories
• Evidence for an anomalous like-sign dimuon charge asymmetry
• Measurement of the CP-violation parameter of B^0 mixing and decay with pp(bar) -> mu mu X data