Strong Phase Measurements - Towards gamma at CLEO-c

TL;DR

This paper discusses how measurements of strong-phase differences in D meson decays at CLEO-c can enhance the precision of gamma angle determination in B decays, crucial for understanding CP violation.

Contribution

It presents new measurements of strong-phase differences in D decays using quantum-correlated data from CLEO-c, aiding in gamma angle extraction.

Findings

Measured strong-phase differences for D -> Kpi, Kpipi^0, Kpipipi, and K^0_Spipi decays.

Improved inputs for gamma angle determination in B -> DK analyses.

Enhanced understanding of D decay dynamics for CP violation studies.

Abstract

Strategies that utilise the interference effects within B -> DK decays hold great potential for improving our sensitivity to the CKM angle gamma. However, in order to exploit fully this potential, knowledge of parameters associated with the D decay, such as strong-phase differences, are required. This essential information can be obtained from the unique quantum-correlated psi(3770) datasets at CLEO-c. Results of such analyses involving the decay modes D -> Kpi, Kpipi^0, Kpipipi and K^0_Spipi will be presented.