Measurements of the branching fraction and decay distributions for K{sub L}{yields}{pi}{sup {+-}}{mu}{sup {+-}}{nu}{gamma} and K{sub L}{yields}{pi}{sup {+-}}e{sup {+-}}{nu}{gamma}
Journal Article
·
· Physical Review. D, Particles Fields
- University of Wisconsin, Madison, Wisconsin 53706 (United States)
- Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 (United States)
- The Department of Physics and Institute of Nuclear and Particle Physics, University of Virginia, Charlottesville, Virginia 22901 (United States); and others
We present measurements of R{sub Kl3{gamma}}{identical_to}{gamma}(K{sub L}{yields}{pi}{sup {+-}}l{sup {+-}}{nu}{gamma};E{sub {gamma}}*>10 MeV)/{gamma}(K{sub L}{yields}{pi}{sup {+-}}l{sup {+-}}{nu}), where l={mu} or e, and E{sub {gamma}}* is the photon energy in the kaon rest frame. These measurements are based on K{sub L} decays collected in 1997 by the KTeV (E832) experiment at Fermilab. With samples of 1385 K{sub L}{yields}{pi}{sup {+-}}{mu}{sup {+-}}{nu}{gamma} and 14221 K{sub L}{yields}{pi}{sup {+-}}e{sup {+-}}{nu}{gamma} candidates, we find R{sub K{mu}}{sub 3{gamma}}=(0.530{+-}0.019)% and R{sub Ke3{gamma}}=(4.942{+-}0.062)%. We also examine distributions of photon energy and lepton-photon angle.
- OSTI ID:
- 20705685
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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