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Measurements of the absolute branching fractions of <math><msup><mi>B</mi><mo>+</mo></msup><mo>→</mo><msub><mi>X</mi><mrow><mi>c</mi><mover><mi>c</mi><mo>¯</mo></mover></mrow></msub><msup><mi>K</mi><mo>+</mo></msup></math> and <math><msup><mi>B</mi><mo>+</mo></msup><mo>→</mo><msup><mover><mi>D</mi><mo>¯</mo></mover><mrow><mo>(</mo><mo>*</mo><mo>)</mo><mn>0</mn></mrow></msup><msup><mi>π</mi><mo>+</mo></msup></math> at Belle
- Source :
- Physical Review
- Publication Year :
- 2018
- Publisher :
- APS, 2018.
-
Abstract
- We present the measurement of the absolute branching fractions of B+→Xcc¯K+ and B+→D¯(*)0π+ decays, using a data sample of 772×106 BB¯ pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. Here, Xcc¯ denotes ηc, J/ψ, χc0, χc1, ηc(2S), ψ(2S), ψ(3770), X(3872), and X(3915). We do not observe significant signals for X(3872) or X(3915) and set the 90% confidence level upper limits at B(B+→X(3872)K+)<2.6×10−4 and B(B+→X(3915)K+)<2.8×10−4. These represent the most stringent upper limit for B(B+→X(3872)K+) to date and the first limit for B(B+→X(3915)K+). The measured branching fractions for ηc and ηc(2S) are the most precise to date, B(B+→ηcK+)=(12.0±0.8±0.7)×10−4 and B(B+→ηc(2S)K+)=(4.8±1.1±0.3)×10−4, where the first and second uncertainties are statistical and systematic, respectively.
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Physical Review
- Accession number :
- edsair.od......3000..122c694c2f157e8cc4725f53f4891002