Sensitivity studies on the CKM angle $\gamma$ in $\Lambda_b^0 \to D\Lambda$ decays

TL;DR

This paper investigates how the decay parameter alpha can enhance the measurement sensitivity of the CKM angle gamma in Lambda_b^0 decays, potentially improving precision and aiding CP violation searches.

Contribution

It introduces the use of the decay parameter alpha as an additional observable to improve gamma sensitivity in Lambda_b^0 decays.

Findings

Adding the observable alpha improves gamma sensitivity by up to 60%

Lambda_b^0 decays are promising for measuring gamma and searching for CP violation

Feasibility studies support the potential of this method

Abstract

The sensitivity of the CKM angle $\gamma$ in $\Lambda_b^0 \to D \Lambda$ decays has been studied using the decay parameter $\alpha$ as an observable in addition to the decay rate asymmetry. Feasibility studies show that adding this observable improves the sensitivity on $\gamma$ by up to 60\% and makes the decays one of the most promising places to measure angle $\gamma$ and to search for $C\!P$ violation in $b$-baryon decays.