Operator Product Expansion for Exclusive DecaysB+<mml:mspace/>→<mml:mspace/>Ds+e+e−andB+<mml:mspace/>→<mml:mspace/>Ds*+e+e−

1999/04/30 by David H. Evans, D.H. Evans, Benjamı́n Grinstein +2 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevlett.83.4947

published as Phys.Rev.Lett. 83 (1999) 4947-4950 · 4 pages, 1 figure, Latex, published version in PRL

openalex publication_date 1999/12/13 · arxiv created 2000/01/18 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The decays B⁺\ensuremath→D_s,d⁺e⁺e^\ensuremath- and B⁺\ensuremath→D_s,d^*+e⁺e^\ensuremath- proceed through a weak and an electromagnetic interaction. This is a typical ``long distance'' process, usually difficult to compute systematically. We propose that over a large fraction of phase space a combination of operator product and heavy quark expansions effectively turns this process into one in which the weak and electromagnetic interactions occur through a local operator. Moreover, we use heavy quark spin symmetry to relate all the local operators that appear in leading order of the operator expansion to two basic ones. We use this operator expansion to estimate the decay rates for B⁺\ensuremath→D_s,d^(*)+e⁺e^\ensuremath-.

Citations

• Matrix elements of four-fermion operators with quenched Wilson fermions
• B LIFETIMES, MIXING AND CP VIOLATION AT CDF
• B+→Ds*+γandB+→D*+γas probes ofVub

Cited by

• Search for B _c ⁺ → π ⁺ μ ⁺μ ^- decays and measurement of the branching fraction ratio \mathcal B (B _c ⁺ → ψ (2S) π ⁺ )/\mathcal B (B _c ⁺ → J \hspace-1.66656pt/\hspace-1.111ptψ π ⁺ )