Study of $D^{\ast \ast }$ production and light hadronic states in the ${\bar{B}}^0\to D^{\ast +}\omega {\pi }^{-}$ decay

Abstract

We report on the first observations of ${\bar{B}}^0\to D_1(2430{)}^0\omega$, ${\bar{B}}^0\to D_1(2420{)}^0\omega$ and ${\bar{B}}^0\to D_2^{\ast }(2460{)}^0\omega$ decays. The ${\bar{B}}^0\to D^{\ast +}\rho (1450{)}^{-}$ decay is also observed. The branching fraction measurements are based on $(771.6\pm 10.6)\times 10^6$ $B\bar{B}$ events collected at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. The fractions of longitudinal polarization of the $D^{\ast \ast }$ states as well as partial wave fractions of the $D_1(2430{)}^0$ are obtained. We also set a $90\%$ confidence level upper limit for the product of branching fractions of $\mathcal{B}({\bar{B}}^0\to D^{\ast +}{b}_1(1235{)}^{-})\times \mathcal{B}(b_1(1235{)}^{-}\to \omega {\pi }^{-})$. The measurements show evidence of nontrivial final-state interaction phases for the $\rho$-like amplitudes.

29 pages, 12 figures, submitted to Physical Review D

References in corpus (8)

• Observation of new resonances decaying to $D\pi$ and $D^{\ast }\pi$ in inclusive $e^{+}{e}^{-}$ collisions near $\sqrt{s}=$10.58 GeV
• Measurement of the form factors of the decay B0 -> D*- ell+ nu and determination of the CKM matrix element |Vcb|
• Measurements of Branching Fractions of $\tau$ Lepton Decays with one or more $K_S^0$
• How good are your fits? Unbinned multivariate goodness-of-fit tests in high energy physics
• Study of $\overline{B^0}\to D^0{\pi }^{+}{\pi }^{-}$ decays
• Production of P-wave Charmed Mesons in Hadronic B Decays
• Measurement of polarization amplitudes and CP asymmetries in $B^0\to \varphi K^{\ast }(892{)}^0$
• Heavy Quark Symmetry in Nonleptonic B-Decays to Excited Charmed Mesons

Cited by in corpus (10)

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• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• A review of the open charm and open bottom systems
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$ with one-prong hadronic $\tau$ decays at Belle
• Observation of the decay $B_s^0\to {\overline{D}}^0{K}^{+}{K}^{-}$
• Observation of $B_s^0\to {\overline{D}}^{\ast 0}\varphi$ and search for $B^0\to {\overline{D}}^0\varphi$ decays
• Contributions of $\rho (770,1450)\to \omega \pi$ for the Cabibbo-favored $D\to h\omega \pi$ decays
• The virtual contributions from $K^{\ast }$ in the $B\to K^{\ast }\pi h$ and $B\to K\rho h$ decays