Measurement of {phi}{sub 3} with Dalitz plot analysis of B{sup {+-}}{yields}D{sup (*)}K{sup {+-}} decay
- Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)
- High Energy Accelerator Research Organization (KEK), Tsukuba (Japan); and others
We present a measurement of the unitarity triangle angle {phi}{sub 3} using a Dalitz plot analysis of the three-body decay of the neutral D meson from the B{sup {+-}}{yields}D{sup (*)}K{sup {+-}} process. The method employs the interference between D{sup 0} and D{sup 0} to extract both the weak and strong phases. We apply this method to a 140 fb{sup -1} data sample collected by the Belle experiment. The analysis uses the modes B{sup {+-}}{yields}DK{sup {+-}} and B{sup {+-}}{yields}D*K{sup {+-}}, D*{yields}D{pi}{sup 0}, where the neutral D meson decays into K{sub S}{pi}{sup +}{pi}{sup -}. We obtain 146 signal candidates for B{sup {+-}}{yields}DK{sup {+-}} and 39 candidates for B{sup {+-}}{yields}D*K{sup {+-}}. From a combined maximum likelihood fit to the B{sup {+-}}{yields}DK{sup {+-}} and B{sup {+-}}{yields}D*K{sup {+-}} modes, we obtain {phi}{sub 3}=77 deg. (+17 deg./-19 deg.)(stat){+-}13 deg. (syst){+-}11 deg. (model). The corresponding 2 standard deviation interval is 26 deg. <{phi}{sub 3}<126 deg.
- OSTI ID:
- 20705306
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 70, Issue 7; Other Information: DOI: 10.1103/PhysRevD.70.072003; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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