Final Results from the KTeV Experiment on the Decay K(L) ---> pi0 gamma gamma
Journal Article
·
· Phys.Rev.D77:112004,2008
The authors report on a new measurement of the branching ratio B(K{sub L} {yields} {pi}{sup 0}{gamma}{gamma}) using the KTeV detector. They reconstruct 1982 events with an estimated background of 608, that results in B(K{sub L} {yields} {pi}{sup 0}{Gamma}{gamma}) = (1.29 {+-} 0.03{sub stat} {+-} 0.05{sub syst}) x 10{sup -6}. They also measure the parameter, a{sub V}, which characterizes the strength of vector meson exchange terms in this decay. They find a{sub V} = -0.31 {+-} 0.05{sub stat} {+-} 0.07{sub syst}. These results utilize the full KTeV data set collected from 1997 to 2000 and supersede earlier KTeV measurements of the branching ratio and a{sub V}.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 933213
- Report Number(s):
- FERMILAB-PUB-08-140-E; arXiv eprint number arXiv:0805.0031
- Journal Information:
- Phys.Rev.D77:112004,2008, Journal Name: Phys.Rev.D77:112004,2008 Vol. 77; ISSN 1550-7998
- Country of Publication:
- United States
- Language:
- English
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