Rare B and Charm Decays at the Tevatron

TL;DR

This paper reports on measurements of rare B and charm decays at the Tevatron, providing limits and first measurements that test the standard model and constrain new physics theories.

Contribution

It presents the first measurement of Lambda_b decay branching fractions and CP asymmetry, along with updated limits on other rare decay branching ratios.

Findings

Results are consistent with the standard model.

Limits on B0s -> mu+mu- and D0 -> mu+mu- decays are improved.

First measurement of Lambda_b -> p pi- and Lambda_b -> p K- branching fractions and CP asymmetry.

Abstract

The measurements of rare decays are highly sensitive to physics beyond the standard model. In this article limits on the branching ratios of the decays B0s -> mu+mu-, D0 -> mu+mu- and D+ -> pi+mu+mu- are presented. Furthermore the first measurement of the branching fraction and CP asymmetry of Lambda_b -> p pi- and Lambda_b -> p K- decays is described. Data samples with an integrated luminosity of up to 2/fb collected at the Tevatron ppbar-collider at sqrt(s)=1.96 TeV were used in these analyses. The results are consistent with the standard model predictions and tighten the constraints on new physics models.