New measurement of the radiative Ke3 branching ratio and photon spectrum

A. Alavi-Harati, T. Alexopoulos, M. Arenton, K. Arisaka, S. Averitte, R. F. Barbosa, A. R. Barker, M. Barrio, L. Bellantoni, A. Bellavance, J. Belz, R. Ben-David, D. R. Bergman, E. Blucher, G. J. Bock, C. Bown, S. Bright, E. Cheu, S. Childress, R. ColemanM. D. Corcoran, G. Corti, B. Cox, M. B. Crisler, A. R. Erwin, R. Ford, A. Glazov, A. Golossanov, G. Graham, J. Graham, K. Hagan, E. Halkiadakis, J. Hamm, K. Hanagaki, S. Hidaka, Y. B. Hsiung, V. Jejer, D. A. Jensen, R. Kessler, H. G.E. Kobrak, J. LaDue, A. Lath, A. Ledovskoy, P. L. McBride, P. Mikelsons, E. Monnier, T. Nakaya, K. S. Nelson, H. Nguyen, V. O'Dell, M. Pang, R. Pordes, V. Prasad, X. R. Qi, B. Quinn, E. J. Ramberg, R. E. Ray, A. Roodman, M. Sadamoto, S. Schnetzer, K. Senyo, P. Shanahan, P. S. Shawhan, J. Shields, W. Slater, N. Solomey, S. V. Somalwar, R. L. Stone, E. C. Swallow, S. A. Taegar, R. J. Tesarek, G. B. Thomson, P. A. Toale, A. Tripathi, R. Tschirhart, S. E. Turner, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, B. Winstein, R. Winston, T. Yamanaka, E. D. Zimmerman

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

We present a new measurement of the branching ratio of the decay KL→π±eν eγ (Ke3γ) with respect to KL→π±eν e (Ke3), and the first study of the photon energy spectrum in this decay. We find BR (Ke3γ, E*γ>30MeV, θ*>20°)/BR (Ke3)=0.908±0.008(stat)-0.012 +0.013(syst)%. Our measurement of the spectrum is consistent with inner bremsstrahlung as the only source of photons in Ke3γ.

Original languageEnglish (US)
Article number112004
Pages (from-to)1120041-1120047
Number of pages7
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume64
Issue number11
StatePublished - Dec 1 2001

    Fingerprint

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Alavi-Harati, A., Alexopoulos, T., Arenton, M., Arisaka, K., Averitte, S., Barbosa, R. F., Barker, A. R., Barrio, M., Bellantoni, L., Bellavance, A., Belz, J., Ben-David, R., Bergman, D. R., Blucher, E., Bock, G. J., Bown, C., Bright, S., Cheu, E., Childress, S., ... Zimmerman, E. D. (2001). New measurement of the radiative Ke3 branching ratio and photon spectrum. Physical Review D - Particles, Fields, Gravitation and Cosmology, 64(11), 1120041-1120047. [112004].