Within the frameworks of the light-front quark model (LFQM) and chiral perturbation theory (ChPT) of O(p6), we reevaluate the form factors of the K+→γ transition. We use these form factors to study the decay of K+→e+νeγ, which is dominated by the structure-dependent contribution. We show the differential decay branching ratio as a function of x=2Eγ/mK, where Eγ(mK) is the photon energy (kaon mass). Explicitly, we find that, in the standard model with the cut of x=0.01 (0.1), the decay branching ratio of K+→e+νeγ is 1.54(1.44)×10-5 and 1.57(1.47)×10-5 in the LFQM and ChPT, respectively.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 2008 Jan 7|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)