Measurement of the branching fraction and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> asymmetry for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mover accent="true"><mml:mi>D</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mn>0</mml:mn></mml:msup><mml:mi>π</mml:mi></mml:math> decays
نویسندگان
چکیده
We measure the branching fractions and $CP$ asymmetries for decays $B^{0}\to \bar{D}^{0}\pi^{0}$ $B^{+}\to \bar{D}^{0}\pi^{+}$, using a data sample of $772\times 10^{6}$ $B\bar{B}$ pairs collected at $\Upsilon(4S)$ resonance with Belle detector KEKB $e^{+}e^{-}$ collider. The obtained direct are $\mathcal{B}(B^{0}\to \bar{D}^{0}\pi^{0}) = [2.70 \pm 0.06~ \text{(stat.)} 0.10~ \text{(syst.)}] \times 10^{-4}$, $\mathcal{B}(B^{+}\to \bar{D}^{0}\pi^{+}) [4.53 0.02~ 0.15~ 10^{-3}$, $ {\cal A}_{CP}(B^{0}\to [+0.42 2.05~ 1.22~ \text{(syst.)}]\%$, A}_{CP}(B^{+}\to [+0.19 0.36~ 0.57~ \text{(syst.)}]\%$. measurements $\mathcal{B}$ most precise to date in good agreement previous results, as is measurement ${\cal \bar{D}^{0}\pi^{+})$. A}_{CP}$ first this mode, value consistent Standard Model expectations.
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['2470-0037', '2470-0010', '2470-0029']
DOI: https://doi.org/10.1103/physrevd.105.072007