Final Results from the KTeV Experiment on the Decay KL -> pi0 gamma gamma
High Energy Physics - Experiment
2010-03-17 v2
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.
Keywords
Cite
@article{arxiv.0805.0031,
title = {Final Results from the KTeV Experiment on the Decay KL -> pi0 gamma gamma},
author = {KTeV Collaboration and E. Abouzaid and M. Arenton and A. R. Barker and L. Bellantoni and E. Blucher and G. J. Bock and E. Cheu and R. Coleman and M. D. Corcoran and B. Cox and A. R. Erwin and C. O. Escobar and A. Glazov and A. Golossanov and R. A. Gomes and P. Gouffon and Y. B. Hsiung and D. A. Jensen and R. Kessler and K. Kotera and A. Ledovskoy and P. L. McBride and E. Monnier and H. Nguyen and R. Niclasen and D. G. Phillips and E. J. Ramberg and R. E. Ray and M. Ronquest and E. Santos and W. Slater and D. Smith and N. Solomey and E. C. Swallow and P. A. Toale and R. Tschirhart and Y. W. Wah and J. Wang and H. B. White and J. Whitmore and M. J. Wilking and B. Winstein and R. Winston and E. T. Worcester and T. Yamanaka and E. D. Zimmerman and R. F. Zukanovich},
journal= {arXiv preprint arXiv:0805.0031},
year = {2010}
}
Comments
8 pages, 8 figures