Papers : Physics

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Search for feebly interacting particles in missing energy $B$ decays at Belle / Daniel Marcantonio ; Phillip Urquijo [BELLE2-PUB-PH-2024-003]
30 April 2024

Recently, there has been great interest in so-called feebly interacting particles (FIPs) - particles beyond the Standard Model that have small couplings to Standard Model particles. [...]
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Measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range 0.62-3.50 GeV at Belle II / Belle II Collaboration [KEK Preprint 2023-51] [Belle II Preprint 2024-004] [BELLE2-PUB-DRAFT-2023-016] [BELLE2-NOTE-PH-2022-038] [BELLE2-PUB-PH-2024-002]
07 April 2024

We report a measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range from 0.62 to 3.50 GeV using an initial-state radiation technique. [...]
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A test of lepton flavor universality with a measurement of $R(D^{*})$ using hadronic $B$ tagging at the Belle~II experiment / The Belle II Collaboration [BELLE2-NOTE-PH-2022-032] [BELLE2-PUB-DRAFT-2023-015] [BELLE2-PUB-PH-2024-001]
05 January 2024

The ratio of branching fractions $R(D^{*}) = \mathcal{B}(\overline{B} \rightarrow D^{*} \tau^{-} \overline{\nu}_{\tau})$/$\mathcal{B} (\overline{B} \rightarrow D^{*} \ell^{-} \overline{\nu}_{\ell})$, where $\ell$ is an electron or muon, is measured using a Belle~II data sample with an integrated luminosity of $189~\mathrm{fb}^{-1}$ at the SuperKEKB asymmetric-energy $e^{+} e^{-}$ collider. [...]
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Measurements of Branching Fraction and time-dependent {\boldmath $C\!P$} Asymmetry in {\boldmath $\Bz\rightarrow \KS\piz$} Decays at Belle~II / S. Hazra ; A. B. Kaliyar ; G. B. Mohanty [BELLE2-PUB-PH-2023-001]
16 January 2023

We report the measurements of branching fraction ($\mathcal{B}$) and time dependent $\CP$-violating asymmetry ($\ACP$ and $\SCP$) in the charmless decays $\Bz\to K^0\pi^0$ at Belle~II. [...]
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Measurement of the $\Omega_c^0$ lifetime at Belle II / Angelo Di Canto ; Nisar Nellikunnummel [BELLE2-PUB-PH-2022-001]
23 June 2022

We report on a measurement of the \Omgc lifetime using $\Omgc\to\Omg\pip$ decays reconstructed in the \epem-collision data collected by Belle~II between 2019 and the first half of 2021, which correspond to \lumi of integrated luminosity. [...]
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The Belle II Physics Book / Emi Kou ; Phillip Urquijo ; B2TiP Theory community ; Belle II Collaboration [KEK Preprint 2018-27] [BELLE2-PUB-PH-2018-001]
29 August 2018

We present the physics program of the Belle II experiment, located on the intensity frontier SuperKEKB e+e- collider. [...]
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