ICHEP2012

Global fits of the unitarity triangle and search for new physics in pseudoscalar-pseudoscalar final states

7 Jul 2012, 18:00

1h

Melbourne Convention and Exhibition Centre

Board: 35

Poster Sessions Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy Poster Session

Speaker

Prof. Eigen Gerald (University of Bergen (NO))

Description

We have updated our unitary triangle fitting program based on the scan method\footnote{Global fits of the CKM matrix. G. Eigen, G.P. Dubois-Felsmann, D.G. Hitlin, F.C. Porter. Eur.Phys.J. C33 (2004) S644, e-Print: hep-ex/0312062.} to constrain the $\overline{\rho }-\overline{\eta }$ plane using the standard input measurements (CKM matrix elements, $\sin 2\beta$, $B_{d(s)}^0$ mixing, and ${ϵ}_K$) as well as branching fraction and $CP$ asymmetry measurements of $B$ decays to all light pseudoscalar-pseudoscalar, pseudoscalar-vector, vector-vector, and $a_1$ pseudoscalar mesons to determine $\alpha$, $D^{(\ast )}{K}^{(\ast )}$ mode to determine $\gamma$, and $D^{(\ast )}\pi$ and $D\rho$ decays to determine $2\beta +\gamma$. We parameterize the individual decay amplitudes in terms of color-allowed tree, color-suppressed tree, penguin, singlet penguin, electroweak penguin, as well as the $W$-exchange and $W$-annihilation amplitudes. With this parameterization, we obtain a good fit to the measured branching fractions and $CP$ asymmetries of all $B$ decays to pseudoscalar-pseudoscalar mesons without any New Physics contributions. This simultaneous fit allows us to determine the correlation between $\alpha$ and $\beta$.

Presentation materials

Slides

CKM-ichep-final.pdf