A fully inclusive measurement of the flavor changing neutral current decay b → sγ was discussed. The first and second moments of the photon energy spectrum above 1.8 GeV were also measured. It was found that the errors were statistical and systematic in nature. The results show that the moments measurement of the spectrum allows the determination of the b-quark mass and of its motion.
Bibliographical noteFunding Information:
We thank T. Hurth, I. Bigi, A. Kagan, and M. Misiak for helpful discussions and correspondences. We thank the KEKB group for the excellent operation of the accelerator, the KEK Cryogenics group for the efficient operation of the solenoid, and the KEK computer group and the NII for valuable computing and Super-SINET network support. We acknowledge support from MEXT and JSPS (Japan); ARC and DEST (Australia); NSFC (Contract No. 10175071, China); DST (India); the BK21 program of MOEHRD, and the CHEP SRC program of KOSEF (Korea); KBN (Contract No. 2P03B 01324, Poland); MIST (Russia); MESS (Slovenia); NSC and MOE (Taiwan); and DOE (U.S.).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)