Eur. Phys. J. C (2008) 55: 51-56
https://doi.org/10.1140/epjc/s10052-008-0600-z

Regular Article - Experimental Physics

The use of quantum-correlated D⁰ decays for φ₃ measurement

Budker Institute of Nuclear Physics, pr. Lavrentieva, 11, 630090, Novosibirsk, Russia

^* e-mail: poluektv@inp.nsk.su

Received: 8 January 2008
Revised: 27 February 2008
Published online: 22 April 2008

Abstract

We report the results of the Monte Carlo study of the method to determine the CKM angle φ₃ using Dalitz plot analysis of D⁰ produced in B^±→DK^± decay. Our main goal is to find the optimal strategy for a model-independent φ₃ extraction. We find that the analysis using decays of CP-tagged D mesons only cannot provide a completely model-independent measurement in the case of a limited data sample. The procedure involving binned analysis of B^±→DK^± and ψ(3770)→(K⁰ _Sπ⁺π^-)_D(K⁰ _Sπ⁺π^-)_D decays is proposed which, in contrast, allows not only to reach the φ₃ precision comparable to an unbinned model-dependent fit, but also provides an unbiased measurement with currently available data.