A Measurement of the Branching Ratio of the ?0 Dalitz Decay Using K(L) {u2192} 3 ?0 Decays from KTeV.
Author | : |
Publisher | : |
Total Pages | : 183 |
Release | : 2007 |
ISBN-10 | : OCLC:1061389615 |
ISBN-13 | : |
Rating | : 4/5 ( Downloads) |
Download or read book A Measurement of the Branching Ratio of the ?0 Dalitz Decay Using K(L) {u2192} 3 ?0 Decays from KTeV. written by and published by . This book was released on 2007 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of B(?0 → e+e-?)/B(?0 → ??) using data taken in 1999 by the E832 KTeV experiment at Fermilab. The ?0s were produced by KL decays in flight that are fully reconstructed. They find 63,693 KL → 3?0 → ?? ?? e+e-? decays in KTeV data (an increase of a factor of ̃20 in event statistics over previous experiments), and normalize to KL → 3?0 → 6?, to extract B(?0 → e+e-?, me+e- > 15 MeV/c2/sup)/B(?sup0 → ??) = (3.920 ± 0.016 ± 0.036) x 10sup-3/sup, where the first error is statistical and the second is systematic. Using the Mikaelian and Smith prediction for the esup+/supesup-/sup mass spectrum as implemented in the KTeV Monte Carlo to correct to the full esup+/supesup-/sup mass range yields B(?sup0/sup → esup+/supesup-/sup?)/B(?sup0