Papers

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2022-11-29
12:36
Reconstruction of B→ρℓνℓ decays identified using hadronic decays of the recoil B meson in 2019 -- 2021 Belle II data / Moritz Bauer ; Nadia Ejlal Toutounji ; Pablo Goldenzweig ; Kevin Varvell [BELLE2-CONF-DRAFT-2022-029] [BELLE2-CONF-PH-2022-029]
29 November 2022

We present results on the semileptonic decays $B^0 \to \rho^- \ell^+ \nu_\ell$ and $B^+ \to \rho^0 \ell^+ \nu_\ell$ in a sample corresponding to 189.9/fb of Belle II data at the SuperKEKB $e^- e^+$ collider [...]
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2022-10-19
09:12
Determination of $|V_{cb}|$ from $B\to D\ell\nu$ decays using 2019--2021 Belle II data / Philipp Horak ; Christoph Schwanda [BELLE2-CONF-PH-2022-010]
19 October 2022

We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $V_{cb}$ using the decay $B\to D\ell\nu$ based on $e^+e^-\to\Upsilon(4S)$~data recorded by the Belle II detector and corresponding to \lumi of integrated luminosity. [...]
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2022-10-11
08:17
Determination of $|V_{ub}|$ from untagged $B^0\to\pi^- \ell^+ \nu_{\ell}$ decays using 2019-2021 Belle~II data / Svenja Granderath ; Florian Bernlochner ; Jochen Dingfelder ; Peter Lewis [BELLE2-CONF-PH-2022-017]
09 October 2022

We present an analysis of the charmless semileptonic decay $B^0\to\pi^- \ell^+ \nu_{\ell}$, where $\ell = e, \mu$, from 198.0 million pairs of $B\bar{B}$ mesons recorded by the Belle~II detector at the SuperKEKB electron-positron collider. [...]
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2022-09-21
12:30
Study of Exclusive $B \to \pi e^+ \nu_e$ Decays with Hadronic Full-event-interpretation Tagging in 189.3 fb$^{-1}$ of Belle II Data / Nadia Toutounji ; Moritz Bauer ; Pablo Goldenzweig ; Kevin Varvell [BELLE2-CONF-PH-2022-008]
16 June 2022

We present a reconstruction of the semileptonic decays $B^0 \to \pi^- e^+ \nu_e$ and $B^+ \to \pi^0 e^+ \nu_e$ in a sample corresponding to 189.3 fb$^{-1}$ of Belle II data, using events where the partner $B$-meson is reconstructed from a large variety of hadronic channels via a tagging algorithm known as the full-event-interpretation. [...]
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2022-09-19
15:13
Measurement of the branching fraction for the decay $B \to K^{\ast}(892)\ell^+\ell^-$ at Belle II / Seema Choudhury [BELLE2-CONF-PH-2022-009]
20 September 2022

We report a measurement of the branching fraction of $B \to K^{\ast}(892)\ell^+\ell^-$ decays, where $\ell^+\ell^- = \mu^+\mu^-$ or $e^+e^-$, using electron-positron collisions recorded at an energy at or near the $\Upsilon(4S)$ mass and corresponding to an integrated luminosity of $189$ fb$^{-1}$ [...]
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2022-09-19
10:08
Measurement of the branching fractions and CP asymmetries of B+ → π+π0 and B+ → K+π0 decays in 2019-2021 Belle II data / Thibaud Humair ; Hans-Günther Moser ; Justin Skorupa [BELLE2-CONF-PH-2022-008]
19 September 2022

We determine the branching fractions B and CP asymmetries ACP of the decays B+ → π+π0 and B+ → K+π0. [...]
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2022-09-14
02:31
Measurement of decay-time dependent CP violation in B0 → KS0KS0KS0 using 2019--2021 Belle II data / Hikaru Tanigawa ; Yutaka Ushiroda ; Kazutaka Sumisawa ; Koji Hara [BELLE2-CONF-PH-2022-007]
14 September 2022

We report a measurement of decay-time dependent CP-violating parameters in B0 → KS0KS0KS0 decays. [...]
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2022-07-21
13:45
Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in {\boldmath $B \to J/\psi K$} decays at Belle II / S. Halder ; R. Tiwary ; S. Sandilya ; G. B. Mohanty [BELLE2-CONF-PH-2022-006]
21 July 2022

We report a study of $B \to J/\psi(\ell^{+}\ell^{-}) K$ decays, where $\ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $\Upsilon(4S)$ resonance [...]
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2022-06-23
05:16
Angular analysis of $B^+ \to \rho^+\rho^0$ decays reconstructed in 2019, 2020, and 2021 Belle~II data / M.~Dorigo ; E.~Ganiev ; R.~Manfredi ; S.~Raiz ; et al [BELLE2-CONF-PH-2022-005]
23 June 2022

We report on a Belle II measurement of the branching fraction~($\mathcal{B}$), longitudinal polarization fraction ~($f_L$), and \CP~asymmetry~$\mathcal{A}_{\CP}$ of $B^+\to \rho^+\rho^0$ decays. [...]
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2022-03-09
08:35
Muon and electron identification efficiencies and hadron-lepton mis-identification rates at Belle II for Moriond 2022 / Charged PID Group ; The Belle II Collaboration [BELLE2-CONF-PH-2022-003]
09 March 2022

We present a collection of selected results on the performance of Belle II in the identification of electrons and muons. [...]
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