학술논문
Final Results from the KTeV Experiment on the Decay KL -> pi0 gamma gamma
Document Type
Working Paper
Author
KTeV Collaboration; Abouzaid, E.; Arenton, M.; Barker, A. R.; Bellantoni, L.; Blucher, E.; Bock, G. J.; Cheu, E.; Coleman, R.; Corcoran, M. D.; Cox, B.; Erwin, A. R.; Escobar, C. O.; Glazov, A.; Golossanov, A.; Gomes, R. A.; Gouffon, P.; Hsiung, Y. B.; Jensen, D. A.; Kessler, R.; Kotera, K.; Ledovskoy, A.; McBride, P. L.; Monnier, E.; Nguyen, H.; Niclasen, R.; Phillips II, D. G.; Ramberg, E. J.; Ray, R. E.; Ronquest, M.; Santos, E.; 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. J.; Winstein, B.; Winston, R.; Worcester, E. T.; Yamanaka, T.; Zimmerman, E. D.; Zukanovich, R. F.
Source
Phys.Rev.D77:112004,2008
Subject
Language
Abstract
We report on a new measurement of the branching ratio B(KL->pi0 gamma gamma)using the KTeV detector. We reconstruct 1982 events with an estimated background of 608, that results in B(KL -> pi0 gamma gamma) = (1.29 +/- 0.03(stat) +/- 0.05(syst)) x 10**-6. We also measure the parameter, aV, which characterizes the strength of vector meson exchange terms in this decay. We find aV = -0.31 +/- 0.05(stat) +/- 0.07(syst). These results utilize the full KTeV data set collected from 1997 to 2000 and supersede earlier KTeV measurements of the branching ratio and aV.
Comment: 8 pages, 8 figures
Comment: 8 pages, 8 figures