Papers 16 records found  previous11 - 16  jump to record: Search took 0.01 seconds. 
11. $\tau$ 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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12. 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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13. 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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14. 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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15. 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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16. Charmless B decay reconstruction in 2019 data / F. Abudinen ; E. Ganiev ; R. Manfredi ; S. Raiz ; et al [BELLE2-CONF-PH-2020-001]
10 April 2020

We report on the reconstruction of various charmless $B$ decays from electron-positron collisions at the energy corresponding to the $\Upsilon(4S)$ resonance collected with the Belle II detector at the SuperKEKB collider. [...]
Fulltext: BELLE2-CONF-PH-2020-001 - Download fulltextPDF; PublicCharmlessForMoriond - Download fulltextPDF;

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