Eur Phys J C (2004) 33: s253-s255
https://doi.org/10.1140/epjcd/s2004-03-1580-y

PS01 Heavy Flavour Physics

Evidence for factorization in three-body decays

¹ Institute of Physics, Academia Sinica, Taipei, Taiwan 115, Republic of China
² Department of Physics, National Taiwan University, Taipei, Taiwan 10764, Republic of China
³ Department of Physics, University of Wisconsin, Madison, WI 53706, USA

Received: 29 November 2003
Accepted: 18 December 2003
Published online: 8 January 2004

Abstract

Motivated by experimental results on , we use a factorization approach to study these decays. Two mechanisms concerning kaon pair production arise: current-produced (from vacuum) and transition (from the B meson). The kaon pair in the decays can be produced only by the vector current (current-produced), whose matrix element can be extracted from processes via isospin relations. The decay rates obtained this way are in good agreement with experiment. The B ^–→ D ^(*)0 K ^– K ⁰ decays involve both current-produced and transition processes. By using QCD counting rules and the measured B ^–→ D ^(*)0 K ^– K ⁰ decay rates, the measured decay spectra can be understood.

PACS: 13.25.Hw – 14.40.Nd