Final results from the KTeV experiment on the decayKL→π0γγ

E Abouzaid,A R Erwin,E D Zimmerman,R Tschirhart,B Winstein,P A Toale,E Blucher,L Bellantoni,E C Swallow,R A Gomes,A Golossanov,J Whitmore,M J Wilking,A Glazov,P Gouffon,M Ronquest,N Solomey,R Niclasen,R F Zukanovich,Y W Wah,Katsushige Kotera ,Y Hsiung ,D Smith,H H Nguyen ,M W Arenton ,D Jensen ,M Corcoran ,A R Barker,P Mcbride ,E Worcester ,C O Escobar,E Cheu,G J Bock,B Cox,E Monnier,Edivaldo Moura Santos ,R Winston,H B White,James Wang ,E Ramberg ,R Coleman,R E Ray,A Ledovskoy,T Yamanaka,W Slater,R Keßler ,D G Phillips

doi:10.1103/physrevd.77.112004

Final results from the KTeV experiment on the decayKL→π0γγ

E Abouzaid, A R Erwin + Show 45 more

Open Access

https://doi.org/10.1103/physrevd.77.112004

Copy DOI

Journal: Physical review. D, Particles and fields	Publication Date: Jun 18, 2008
Citations: 44

Affiliation: University of Chicago, University of Colorado System, University of Colorado Boulder, Fermi National Accelerator Laboratory, Elmhurst College, Universidade Estadual de Campinas, University of Virginia, Universidade de São Paulo, Osaka University, Rice University, Institute of Nuclear and Particle Physics, Délégation Provence et Corse, University of Arizona, University of California, Los Angeles

#KTeV Detector #KTeV Experiment + Show 8 more

Abstract
Full-Text PDF
Similar Papers

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.

Full Text