Pinning down the kaon form factors inK+→μ+νμγdecay

2003/02/28 by Fedor Bezrukov, F. L. Bezrukov, D. S. Gorbunov +3 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.67.091503

published as Phys.Rev. D67 (2003) 091503 · revtex, 5 pages, 2 figures. Minor corrections made for the journal version of the paper

openalex publication_date 2003/05/22 · arxiv created 2003/05/27 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We find that the normal muon polarization in the decay \stackrel\ensuremath→K\ensuremathμ\ensuremathν_\ensuremathμ\ensuremathγ is very sensitive to the values of the kaon vector F_V and axial-vector F_A form factors. It is shown that the ongoing KEK-E246 experiment can definitely determine the signs of the sum of the form factors if their difference is fixed from other considerations. This method can also verify the form factor values and signs obtained from the K⁺\ensuremath→l⁺\ensuremathν_le⁺e^\ensuremath- decays. A new experiment with sensitivity to the normal and transverse muon polarizations of about 10^\ensuremath-4 will provide a unique possibility to determine the F_V and F_A values with a few percent accuracy.

Citations

• Review of particle properties
• Review of Particle Physics

Cited by

• Axial-vector form factors for K2 and π2 at O(p6) in chiral perturbation theory

Related

• Transverse muon polarization in K+ -> mu+ nu_mu gamma: scanning over the Dalitz plot
• Muon Polarization Working Group Report
• Kaon Radiative Decay K+ -> mu+ nu gamma at CKM at the Fermilab Main Injector
• NLO CHPT corrections to the transverse muon polarization in K_l2γ decay
• Polarization Response Functions in Kaon Electroproduction