T. Kawasaki

Measurement of the branching fraction and $\it CP$ asymmetry of $B^{0} \rightarrow π^{0} π^{0}$ decays using $198 \times 10^6$ $B\overline{B}$ pairs in Belle II data

F. Abudinén, I. Adachi, K. Adamczyk, L. Aggarwal et autres

We report measurements of the branching fraction and $CP$ asymmetry in $B^{0} \to \pi^{0} \pi^{0}$ decays reconstructed at Belle II in an electron-positron collision sample containing $198 \times 10^{6}$$B\overline{B}$ pairs. We measure a branching fraction $\mathcal{B}(B^0 \rightarrow \pi^0 \pi^0) = (1.38 \pm …

Measurement of branching fractions and CP asymmetries for Ds+→K+(η,π0) and Ds+→π+(η,π0) decays at Belle

Y. Guan, A. J. Schwartz, K. Kinoshita, Ichiro Adachi et autres

We report measurements of the branching fractions and $CP$ asymmetries for ${D}_{s}^{+}\ensuremath{\rightarrow}{K}^{+}\ensuremath{\eta}$, ${D}_{s}^{+}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{0}$, and ${D}_{s}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\eta}$ decays, and the branching fraction for ${D}_{s}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}$. Our results are based on a data sample corresponding to an integrated luminosity of $921\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the …

us, jp, sa, ru, de, in, cz, si, pl, it, tw, kr, cn, au (code pays fourni par la source)

Measurements of branching fractions and direct CP asymmetries in $B^{0}\to K^{+} π^{-}$, $B^+ \to K_{\rm S}^0π^+$ and $B^0 \to π^+π^-$ using 2019 and 2020 data

F. Abudinén, Ichiro Adachi, R. Adak, K. Adamczyk et autres

We report updated measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries ($\mathcal{A_{\rm CP}}$) for charmless $B$ decays at Belle II, which operates on or near the $Υ$(4S) resonance at the SuperKEKB asymmetric energy $e^{+}e^{-}$ collider. We use samples of 2019 and …

fr (code pays fourni par la source)

First search for direct $CP$-violating asymmetry in $B^0 \to K^0 π^0$ decays at Belle II

F. Abudinén, Ichiro Adachi, R. Adak, K. Adamczyk et autres

We report on the first measurement of the direct $CP$-violating asymmetry ($\mathcal{A}$) in the charmless decay $B^0 \to K^0π^0$ at Belle II and an updated measurement of its branching fraction ($\mathcal{B}$). We use a sample of electron-positron collisions collected in 2019 and …

fr (code pays fourni par la source)

Measurement of the CKM matrix element | V c b | from B 0 → D * − ℓ + ν ℓ at Belle

Eiasha Waheed, P. Urquijo, D. Ferlewicz, Ichiro Adachi et autres

We present a new measurement of the Cabibbo-Kobayashi-Maskawa matrix element $|{V}_{cb}|$ from ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}}$ decays, reconstructed with the full Belle data set of $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity. Two form factor parametrizations, originally conceived by the Caprini-Lellouch-Neubert (CLN) and the Boyd, Grinstein and …

au, jp, pl, sa, us, ru, in, de, cz, si, it, tw, kr, fr, cn (code pays fourni par la source)

Measurement of branching fraction and direct CP asymmetry in B0→ρ0π0 decays

J. Dragic, K. Abe, K. Abe, I. Adachi et autres

We report a measurement of the branching fraction of the decay ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\rho}}^{0}{\ensuremath{\pi}}^{0}$, using $386\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. We detect ${51}_{\ensuremath{-}13}^{+14}$ signal events with a significance of 4.2 standard …

jp, ru, us, au, ch, si, tw, pl, kr, in, at, cn (code pays fourni par la source)