학술논문
Measurements of the Branching Fractions and Decay Distributions for KL->\pi\mu\nu\gamma and KL->\pi e\nu\gamma
Document Type
Working Paper
Author
Alexopoulos, T.; Andre, T.; Arenton, M.; Barbosa, R. F.; Barker, A. R.; Bellantoni, L.; Bellavance, A.; Blucher, E.; Bock, G. J.; Cheu, E.; Childress, S.; Coleman, R.; Corcoran, M. D.; Cox, B.; Erwin, A. R.; Ford, R.; Glazov, A.; Golossanov, A.; Graham, J.; Hamm, J.; Hanagaki, K.; Hsiung, Y. B.; Huang, H.; Jejer, V.; Jensen, D. A.; Kessler, R.; Kobrak, H. G. E.; Kotera, K.; LaDue, J.; Ledovskoy, A.; McBride, P. L.; Monnier, E.; Nelson, K. S.; Nguyen, H.; Niclasen, R.; Prasad, V.; Qi, X. R.; Ramberg, E. J.; Ray, R. E.; Ronquest, M.; Santos, E.; Shanahan, P.; Shields, J.; Slater, W.; Smith, D.; Solomey, N.; Swallow, E. C.; Toale, P. A.; Tschirhart, R.; Wah, Y. W.; Wang, J.; White, H. B.; Whitmore, J.; Wilking, M.; Winstein, B.; Winston, R.; Worcester, E. T.; Yamanaka, T.; Zimmerman, E. D.
Source
Phys.Rev.D71:012001,2005
Subject
Language
Abstract
We present measurements of R_Kl3rad = Gamma(KL->\pi\ell\nu\gamma; Egcm > 10 MeV)/Gamma(KL->\pi\ell\nu), where ell = mu or e, and Egcm is the photon energy in the kaon rest frame. These measurements are based on KL decays collected in 1997 by the KTeV (E832) experiment at Fermilab. With samples of 1385 KL->\pi\mu\nu\gamma and 14221 KL->\pi\e\nu\gamma candidates, we find R_Km3rad = (0.530 +- 0.019)% and R_Ke3rad = (4.942 +- 0.062)%. We also examine distributions of photon energy and lepton-photon angle.
Comment: Submitted to Phys. Rev. D
Comment: Submitted to Phys. Rev. D