DecayD0→K¯*0π−e+νein the context of chiral perturbation theory
- 1 December 1996
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 54 (11) , 6830-6836
- https://doi.org/10.1103/physrevd.54.6830
Abstract
We study the decay D0→K¯*0π−e+νe, using SU(2)L⊗SU(2)R chiral perturbation theory for heavy charmed mesons and vector mesons, in the kinematic regime where pM·pπmM (here M=D0 or K¯*0) is much smaller than the chiral symmetry-breaking scale ΛχSB (ΛχSB∼1 GeV). We present the leading diagrams and amplitude, and calculate the rate, in the region where, to leading order in our calculations, the K¯*0 is at zero recoil in the D0 rest frame. The rate thus calculated is given in terms of a known form factor and depends on the DD*π coupling constant gD of the heavy (charmed) meson chiral perturbation theory Lagrangian. A measurement of the above decay, in the aforementioned kinematic regime, can result in the extraction of an experimental value for gD, accurate at the level of our approximations, and gives us a measure of the validity of approaches based on chiral perturbation theory in studying similar processes.Keywords
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