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http://hdl.handle.net/123456789/1732| Title: | Measurement of the branching fraction and CP asymmetry in B0 → π0π0 decays, and an improved constraint on ϕ2 |
| Authors: | Bhardwaj, V. |
| Keywords: | CPviolation decayB0→π0π0 752×106BBpairs |
| Issue Date: | 2017 |
| Publisher: | Cornell University |
| Citation: | Physical Review D, 96 (11) |
| 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. |
| Description: | Only IISERM authors are available in the record. |
| URI: | https://arxiv.org/abs/1705.02083 http://hdl.handle.net/123456789/1732 |
| Appears in Collections: | Research Articles |
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