The first evidence of the decay B0 → ρ 0π0 is discussed. The data collected at the υ(4S) resonance with the Belle detector at the KEKB asymmetric e+e - collider is used for the purpose. 15.1±4.8 signal events are detected with a significance of 3.5 standard deviations. The branching fraction is also measured which equals to (5.1 ± 1.6(stat) ± 0.9(syst)) × 10 -6.
Bibliographical noteFunding Information:
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), from ARC and DEST (Australia), from NSFC (Contract No. 10175071, China), from DST (India), from the BK21 program of MOEHRD and the CHEP SRC program of KOSEF (Korea), from KBN (Contract No. 2P03B 01324, Poland), from MIST (Russia), from MESS (Slovenia), from NSC and MOE (Taiwan), and from DOE (USA).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)