Journal article
Evidence for CP violation in the decay D →KS0π
BR Ko, E Won, I Adachi, H Aihara, DM Asner, V Aulchenko, T Aushev, T Aziz, AM Bakich, K Belous, V Bhardwaj, B Bhuyan, M Bischofberger, A Bondar, G Bonvicini, A Bozek, M Bračko, TE Browder, MC Chang, A Chen Show all
Physical Review Letters | Published : 2012
Abstract
We observe evidence for CP violation in the decay D +→ KS0π + using a data sample with an integrated luminosity of 977fb -1 collected by the Belle detector at the KEKB e +e - asymmetric-energy collider. The CP asymmetry in the decay is measured to be (-0.363±0.094±0.067)%, which is 3.2 standard deviations away from zero, and is consistent with the expected CP violation due to the neutral kaon in the final state. © 2012 American Physical Society.
Grants
Funding Acknowledgements
We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET4 network support. We acknowledge support from MEXT, JSPS and Nagoya's TLPRC (Japan); ARC and DIISR (Australia); NSFC (China); MSMT (Czechia); DST (India); INFN (Italy); MEST, NRF, GSDC of KISTI, and WCU (Korea); MNiSW (Poland); MES and RFAAE (Russia); ARRS (Slovenia); SNSF (Switzerland); NSC and MOE (Taiwan); and DOE and NSF (USA). B. R. Ko acknowledges support by a Korea University Grant, NRF Grant No. 2011-0025750, and E. Won by NRF Grant No. 2011-0030865.