Evidence for the decay B0->eta pi^0

Abstract

We report a search for the charmless hadronic decay $B^0\to \eta {\pi }^0$ with a data sample corresponding to an integrated luminosity of 694 $\mathrm{f}{\mathrm{b}}^{-1}$ containing $753\times 10^6$ $B\bar{B}$ pairs. The data were collected by the Belle experiment running on the ${\rm Y}(4S)$ resonance at the KEKB $e^{+}{e}^{-}$ collider. We measure a branching fraction $\mathcal{B}(B^0\to \eta {\pi }^0)=(4.1_{-1.5-0.7}^{+1.7+0.5})\times 10^{-7}$, where the first uncertainty is statistical and the second is systematic. Our measurement gives an upper limit of $\mathcal{B}(B^0\to \eta {\pi }^0)<6.5\times 10^{-7}$ at 90\% confidence level. The signal has a significance of $3.0$ standard deviations and constitutes the first evidence for this decay mode.

arXiv comment11 pages, 3 figures, 2 tables, submitted to Physical Review D(R)

References in corpus (27)

• PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays
• QCD factorization for B->PP and B->PV decays
• Kernel Estimation in High-Energy Physics
• A Measurement of the Branching Fraction for the Inclusive B --> X(s) gamma Decays with the Belle Detector
• Flavor Physics in the Quark Sector
• Charmless $B\to PP$ decays using flavor SU(3) symmetry
• Two body B decays with isosinglet final states in SCET
• B, D and K decays
• Neutral B Flavor Tagging for the Measurement of Mixing-induced CP Violation at Belle
• Revisiting Charmless Hadronic B_{u,d} Decays in QCD Factorization
• Updating B --> PP, VP decays in the framework of flavor symmetry
• Two-body B Meson Decays to eta and eta': Observation of B->eta K*
• Measurement of Branching Fractions for B->ππ, Kπand KK Decays
• Phenomenological Analysis of Charmless Decays Bs->PP,PV with QCD Factorization
• Isospin-breaking effects on alpha extracted in B --> pi pi, rho rho, rho pi
• Two-Body Charmless B Decays Involving eta and eta'
• Revisiting Charmless Two-Body B Decays involving ${\eta }^{\prime }$ and $\eta$
• Flavor SU(3) analysis of charmless B meson decays to two pseudoscalar mesons
• Correlated bounds on CP asymmetries in $B^0\to {\eta }^{\prime }{K}_S$
• $B\to \eta ({\eta }^{\prime })K(\pi )$ in the Standard Model with Flavor Symmetry
• Branching Ratio and CP Asymmetry of $B\to \pi {\eta }^{(\prime )}$ Decays in the Perturbative QCD Approach
• Charmless Hadronic B-Meson Decays
• Measurement of $B^0\to J/\psi {\eta }^{(}{}^{\prime }{}^{)}$ and Constraint on the $\eta -{\eta }^{\prime }$ Mixing Angle
• Towards a Precision Determination of alpha in B \to pi pi Decays
• Charmless $B\to PP$ decays and the new physics effects in the minimal supergravity model
• Measurements of Branching Fractions and CP Asymmetries in B-> etah Decays
• Observation of B->etarho+ and search for B0 Decays to eta'eta, etapi0, eta'pi0, and omegapi0

Cited by in corpus (6)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• 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
• A global $SU(3)/U(3)$ flavor symmetry analysis for $B\to PP$ with $\eta -{\eta }^{\prime }$ Mixing
• Revisiting Final State Interaction in Charmless $B_q\to PP$ Decays
• Search for $B_s^0\to {\eta }^{\prime }{X}_{s\bar{s}}$ at Belle using a semi-inclusive method