Branching Fractions and CP Asymmetries in Two-Body Nonleptonic Charmless b-Hadron Decays

TL;DR

This paper reports measurements of branching fractions and CP asymmetries in various two-body nonleptonic charmless b-hadron decays, including the first measurement of Br(B_s^0 -> K^+ K^-), using data from the CDF II detector.

Contribution

It provides the first measurement of the B_s^0 -> K^+ K^- branching fraction and explores CP asymmetries and rare decay channels in b-hadron decays at the Tevatron.

Findings

Measured relative branching fractions of B^0_d,s decays.

First measurement of Br(B_s^0 -> K^+ K^-).

Set limits on rare decay channels.

Abstract

Relative branching fractions of B^0_d,s -> h^+ h^'- decays (where h, h' = K or pi) and the direct CP asymmetry A_CP in the B^0_d -> K^+ pi^- mode are measured with 179 +- 11 pb^-1 of data collected at sqrt{s} = 1.96 TeV using the CDF II detector at the Fermilab Tevatron ppbar collider. The first branching-fraction measurement of a B^0_s meson to two pseudoscalars, Br(B^0_s -> K^+ K^-), and a search for the baryon mode Lambda^0_b -> p^+ h^- are also presented, in addition to branching-fraction limits on the rare channels B^0_s -> K^+ pi^-, B^0_d -> K^+ K^-, and B^0_s -> pi^+ pi^-.