Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2
| dc.contributor.author | Bhardwaj, V. | |
| dc.date.accessioned | 2020-11-18T04:28:57Z | |
| dc.date.available | 2020-11-18T04:28:57Z | |
| dc.date.issued | 2017 | |
| dc.description | Only IISERM authors are available in the record. | |
| dc.description.abstract | We measure the branching fraction andCPviolation asymmetry in the decayB0→π0π0, usinga data sample of 752×106BBpairs collected at the Υ(4S) resonance with the Belle detector atthe KEKBe+e−collider. The obtained branching fraction and directCPasymmetry areB(B→π0π0) = [1.31±0.19 (stat.)±0.19 (syst.)]×10−6andACP= +0.14±0.36 (stat.)±0.10 (syst.),respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations.We combine these results with Belle’s earlier measurements ofB0→π+π−andB±→π±π0toexclude theCP-violating parameterφ2from the range 15.5◦< φ2<75.0◦at 95% confidence level. | en_US |
| dc.identifier.citation | Physical Review D, 96 (11) | en_US |
| dc.identifier.other | 10.1103/PhysRevD.96.032007 | |
| dc.identifier.uri | https://arxiv.org/abs/1705.02083 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/1732 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Cornell University | en_US |
| dc.subject | CPviolation | en_US |
| dc.subject | decayB0→π0π0 | en_US |
| dc.subject | 752×106BBpairs | en_US |
| dc.title | Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2 | en_US |
| dc.type | Article | en_US |