Papers

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2020-08-05
15:20
Studies of the semileptonic $\bar B^0\to D^{*+}\ell^-\bar\nu_\ell$ and $B^-\to D^{0}\ell^-\bar\nu_\ell$ decay processes with \mbox{34.6 fb$^{-1}$} of Belle II data / Florian Bernlochner ; Lu Cao ; Daniel Dorner ; Philipp Horak ; et al [BELLE2-CONF-PH-2020-008]
05 August 2020

We report measurements of the $\bar B^0\to D^{*+}\ell^-\bar\nu_\ell$ and $B^-\to D^{0}\ell^-\bar\nu_\ell$ processes using \mbox{34.6 fb$^{-1}$} of collision events recorded by the Belle~II experiment at the SuperKEKB asymmetric-energy $e^+ e^-$ collider [...]
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2020-08-05
14:51
A calibration of the Belle II hadronic tag-side reconstruction algorithm with $B \rightarrow X\ell \nu$ decays / William Sutcliffe ; Florian Bernlochner [BELLE2-CONF-PH-2020-019]
08 May 2020

Tag-side reconstruction is an important method for reconstructing $B$ meson decays with missing energy. [...]
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2020-08-05
06:11
Exclusive $B^0 \to \pi^- \ell^+ \nu_\ell$ Decays with Hadronic Full Event Interpretation Tagging in 34.6\invfb of Belle II Data / Nadia Toutounji ; Kevin Varvell ; Moritz Bauer ; Pablo Goldenzweig [BELLE2-CONF-PH-2020-007]
05 August 2020

We present the results of the re-discovery of the decay $B^0 \to \pi^- \ell^+ \nu_\ell$ in 34.6\invfb of Belle II data using hadronic $B$-tagging via the Full Event Interpretation algorithm [...]
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2020-08-04
05:12
$\tau$ lepton mass measurement at Belle II / The Belle II Collaboration [BELLE2-CONF-PH-2020-010]
04 August 2020

The reconstruction of tau-pair production, $\epem \to \tau^{+}\tau^{-}$, from the subsequent 3-prong ($\tau^{+} \rightarrow \pi^{+} \pi^{-} \pi^{+} \bar{\nu}_{\tau}$) and 1-prong ($\tau^{-} \to \ell^{-} \bar{\nu}_{\ell} \nu_{\tau}$, $\tau^{-} \to h^{-} \nu_{\tau}$ or $\tau^{-} \to \pi^{-} \pi^0 \nu_{\tau}$) decays, is presented using 8.76~\invfb of $\epem $ collision data of {\belletwo} at the center-of-mass energy $\sqrt{s} = m_{\Upsilon(4S)}$ [...]
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2020-07-31
08:00
Rediscovery of $B \to \phi K^{(*)}$ decays and measurement of the longitudinal polarization fraction $f_L$ in $B \to \phi K^{*}$ decays using the Summer 2020 Belle II dataset / The Belle II Collaboration [BELLE2-CONF-PH-2020-006]
31 July 2020

We utilize a sample of 34.6\invfb, collected by the Belle II experiment at the SuperKEKB asymmetric energy \epem\ collider, to search for the $\Bp \to \phi \Kp$, $\Bp \to \phi \Kstarp$, $\Bz \to \phi \KS$, and $\Bz \to \phi \Kstarz$ decays [...]
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2020-07-28
10:17
First flavor tagging calibration using 2019 Belle II data / Fernando Abudinén ; Takeo Higuchi ; Colm Murphy [BELLE2-CONF-PH-2020-004]
28 July 2020

We report on the first calibration of the standard Belle II B-flavor tagger using the full data set collected at the Upsilon(4S) resonance in 2019 with the Belle II detector at the SuperKEKB collider, corresponding to 8.7/fb of integrated luminosity. [...]
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2020-07-19
03:14
Hadronic FEI tagged $\bar{B}^{0} \rightarrow D^{*+} \ell^{-} \bar{\nu}_{\ell}$ in early Phase III data / K. Amirie ; F. Bernlochner ; R. Cheaib ; M. Eliachevitch ; et al [BELLE2-CONF-PH-2020-023]
18 July 2020

We present a first measurement of the $ B^0 \rightarrow \D^{+} \ell \nu$ branching fraction using fully reconstructed B meson decays employing the Full-Event-Interpretation algorithm. [...]
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2020-07-10
16:32
Performance studies and calibration of the Belle II Hadronic tag-sde reconstruction / William Sutcliffe ; Florian Bernlochner [BELLE2-CONF-PH-2020-003]
10 July 2020

Hadronic tag-side reconstruction is an important method for reconstructing B meson decays with missing energy. [...]
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2020-05-15
11:38
Measurement of the $B^{0}$ lifetime using fully reconstructed hadronic decays in the 2019 Belle II dataset / Reem Rasheed ; Jerome Baudot ; Giulio Dujany ; Sviatoslav Bilokin ; et al [BELLE2-CONF-PH-2020-003]
15 May 2020

This document presents the measurement of B 0 meson lifetimes using the 2019 Belle II dataset that corresponds to an integrated luminosity of $8.7 \pm 0.2 fb^{-1}$. [...]
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2020-04-15
08:48
Measurement of the branching fraction of $B^{0}\to D^{*-}l^{+}\nu_{l}$ with early Belle II data / Minakshi Nayak ; Abner Soffer ; Florian Bernlochner ; Lu Cao ; et al [BELLE2-CONF-PH-2020-002]
15 April 2020

We measure the branching fractions for the decays $B^{0}\to D^{*-}e^{+}\nu_{e}$ and $B^{*0}\to D^{*-}\mu^{+}\nu_{\mu}$ using the first $8.70 \pm 0.09 fb^{-}$ of data collected by the Belle II experiment at the SuperKEKB asymmetric-energy $e^+ e^-$ collider using the decays $D^{*+}\to D^0 \pi^+$ and $D^0\to K^-\pi^+$..
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