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Paper detail

Final Results from the KTeV Experiment on the Decay KL -> pi0 gamma gamma

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.

preprint2008arXivOpen access
KTeV collaborationE. AbouzaidM. ArentonA. R. BarkerL. BellantoniE. BlucherG. J. BockE. CheuR. ColemanM. D. CorcoranB. CoxA. R. ErwinC. O. EscobarA. GlazovA. GolossanovR. A. GomesP. GouffonY. B. HsiungD. A. JensenR. KesslerK. KoteraA. LedovskoyP. L. McBrideE. MonnierH. NguyenR. NiclasenD. G. Phillips IIE. J. RambergR. E. RayM. RonquestE. SantosW. SlaterD. SmithN. SolomeyE. C. SwallowP. A. ToaleR. TschirhartY. W. WahJ. WangH. B. WhiteJ. WhitmoreM. J. WilkingB. WinsteinR. WinstonE. T. WorcesterT. YamanakaE. D. ZimmermanR. F. Zukanovich
hep-ex
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KTeV collaborationE. AbouzaidM. ArentonA. R. BarkerL. BellantoniE. BlucherG. J. BockE. CheuR. ColemanM. D. CorcoranB. CoxA. R. ErwinC. O. EscobarA. GlazovA. GolossanovR. A. GomesP. GouffonY. B. HsiungD. A. JensenR. KesslerK. KoteraA. LedovskoyP. L. McBrideE. MonnierH. NguyenR. NiclasenD. G. Phillips IIE. J. RambergR. E. RayM. RonquestE. SantosW. SlaterD. SmithN. SolomeyE. C. SwallowP. A. ToaleR. TschirhartY. W. WahJ. WangH. B. WhiteJ. WhitmoreM. J. WilkingB. WinsteinR. WinstonE. T. WorcesterT. YamanakaE. D. ZimmermanR. F. Zukanovich

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