Precise measurement of the CP violation parameter sin 2Φ1 in B0 → (c$$\bar{c}$$)K0 decays
We present a precise measurement of the CP violation parameter sin2$$\phi$$1 and the direct CP violation parameter $$A$$f using the final data sample of 772×106 $$B\overline{B}$$ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. One neutral B meson is reconstructed in a J/ψK$$0\atop{S}$$, ψ(2S)K$$0\atop{S}$$, χc1K$$0\atop{S}$$, or J/ψK$$0\atop{L}$$ CP eigenstate and its flavor is identified from the decay products of the accompanying B meson. From the distribution of proper-time intervals between the two B decays, we obtain the following CP violation parameters: sin2 $$\phi$$1=0.667±0.023(stat)±0.012(syst) and $$A$$f=0.006±0.016(stat)±0.012(syst).
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- Contributing Organization:
- The Belle Collaboration
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1339054
- Report Number(s):
- PNNL-SA-87999; KA2201020
- Journal Information:
- Physical Review Letters, Vol. 108, Issue 17; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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