Prospects for the Measurement of the Unitarity Triangle Angle gamma from B0 to DK+pi- Decays

TL;DR

This paper explores an enhanced method for measuring the Unitarity Triangle angle gamma using $B^0$ decays to $DK^+ ho^-$, incorporating suppressed $D$ decay modes and considering experimental effects to improve sensitivity.

Contribution

It extends existing techniques by including suppressed $D$ decay modes and evaluates their impact on gamma measurement sensitivity.

Findings

Enhanced sensitivity to gamma with the extended method.

Inclusion of suppressed $D$ decay modes improves measurement prospects.

Experimental effects like background contamination are manageable.

Abstract

The potential for a precise measurement of the Unitarity Triangle angle $\gamma$ in future experiments from the decay $B^0 \to DK^{*0}$ is well-known. It has recently been suggested that the sensitivity can be significantly enhanced by analysing the $B^0 \to DK^+\pi^-$ Dalitz plot to extract amplitudes relative to those of the flavour-specific decay $B^0 \to D_2^{*-}K^+$. An extension to this method which includes the case where the neutral $D$ meson is reconstructed in suppressed final states is presented. The sensitivity to $\gamma$ is estimated using this method and compared to that obtained using the $B^0 \to DK^{*0}$ decay alone. Experimental effects, such as background contamination, are also considered. This approach appears to be a highly attractive addition to the family of methods that can be used to determine $\gamma$.