Measurement of the branching ratio of K{sub L}{r_arrow}e{sup +}e{sup {minus}}{gamma}{gamma}
Journal Article
·
· Physical Review D
- and others
We report on a study of the decay K{sub L}{r_arrow}e{sup +}e{sup {minus}}{gamma}{gamma} carried out as a part of the KTeV/E799 experiment at Fermilab. The 1997 data yielded a sample of 1543 events, including an expected background of 56{+-}8 events. An effective form factor was determined from the observed distribution of the e{sup +}e{sup {minus}} invariant mass. Using this form factor in the calculation of the detector acceptance, the branching ratio was measured to be B(K{sub L}{r_arrow}e{sup +}e{sup {minus}}{gamma}{gamma},E{sub {gamma}}{sup *}{gt}5MeV)=(5.84{+-}0.15(stat){+-}0.32(syst)){times}10{sup {minus}7}.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204444
- Journal Information:
- Physical Review D, Journal Name: Physical Review D Journal Issue: 1 Vol. 64; ISSN 0556-2821
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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