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1.
| Tests of lepton universality in the rates of inclusive semileptonic B-meson decays at Belle II
/ Henrik Junkerkalefeld ; Jochen Dingfelder ; Peter Lewis ; Florian Bernlochner
[BELLE2-PTHESIS-2024-017]
Presented on 28 06 2024 PhD
2024
Physikalisches Institut
/ Bonn
This thesis presents two precision tests of lepton universality: the first measurement of the ratio of light-lepton branching fractions of inclusive semileptonic $B$-meson decays, $R(X_{e/mu}) = \mathcal{B}(B \to Xe\nu) / \mathcal{B}(B \to X\mu\nu)$, and the first successful measurement of inclusive $B \to X\tau\nu$ decays, measured in a ratio relative to $B \to X\ell\nu$ decays ($\ell = e, \mu$), $R(X_{\tau/\ell}) = \mathcal{B}(B \to X\tau\nu) / \mathcal{B}(B \to X\ell\nu)$. [...]
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2.
| Recent results in B physics (covering all experiments)
/ Peter Lewis
[BELLE2-TALK-DRAFT-2024-066]
[BELLE2-TALK-CONF-2024-072]
13 May 2024
/ DPF-PHENO 2024
A survey of the most recent results in B physics, with a particular focus on b-->c tau nu and b-->sll/snunu..
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3.
| The Belle II Upgrade Program
/ Peter Lewis
[BELLE2-TALK-DRAFT-2023-174]
[BELLE2-TALK-CONF-2023-181]
28 November 2023
/ 16th International Conference on Heavy Quarks and Leptons
A summary of the upgrade program of Belle II, particularly planned LS2 upgrades [...]
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4.
| Feasibility of inclusive R(X) at Belle II
/ Peter Lewis
[BELLE2-TALK-DRAFT-2023-005]
[BELLE2-TALK-CONF-2023-016]
09 February 2023
/ 7th KEK Flavour-Factory Workshop
Discussing the feasibility of measuring the inclusive branching fraction ratio R(X) at Belle II as a test of lepton universality..
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5.
| Optimization of long-lived neutral kaon detection and rejection at the Belle II experiment
/ Lucas Stötzer ; Prof. Dr. Jochen Dingfelder ; Dr. Peter Lewis
[BELLE2-MTHESIS-2022-041]
Presented on 21 11 2022 MSc
2022
Physikalisches Institut
/ Bonn
We investigate an optimization of the reconstruction of neutral long living Kaons ($K_L^0$) at the Belle II experiment. [...]
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6.
| 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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7.
| Semileptonic decay at Belle and Belle II
/ Peter Lewis
[BELLE2-TALK-DRAFT-2022-119]
[BELLE2-TALK-CONF-2022-093]
14 August 2022
/ Vietnam Flavour Physics Conference 2022
An overview of recent results in semileptonic B decays at Belle and Belle II..
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8.
| Belle II: status and prospects
/ Peter Lewis
[BELLE2-TALK-DRAFT-2021-138]
[BELLE2-TALK-CONF-2021-123]
20 September 2021
/ NUCLEUS – 2021. Nuclear physics and elementary particle physics. Nuclear physics technologies
The Belle II experiment at the SuperKEKB energy-asymmetric e+e− collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. [...]
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9.
| Tagged Analysis of $B^0\to\pi^-\ell^+\nu_\ell$ at Belle
/ Jonathan Wolfgang Grumke ; Jochen Dingfelder ; Peter Lewis
[BELLE2-MTHESIS-2021-075]
Presented on 25 08 2021 MSc
2021
Physikalisches Institut
/ Bonn
Using the FEI algorithm with simulated data for hadronic tagging in the reconstruction of $B^0\to\pi^-\ell^+\nu_\ell$ results in a signal yield of $626\pm 39$ when applying the same selections as Sibidanov et al., who used the FR algorithm and obtained a signal yield of $463\pm 28$. [...]
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10.
| Investigation of B → µ ν_µ with Inclusive Tagging at Belle II
/ Daniel Jacobi ; Prof. Dr. Jochen Dingfelder ; Dr. Peter Lewis ; Svenja Katharina Granderath
[BELLE2-MTHESIS-2021-074]
Presented on 25 08 2021 MSc
2021
Physikalisches Institut
/ Bonn
In this thesis the rare $B \to \mu \nu_{\mu}$ decay was investigated using the inclusive tagging approach. [...]
Fulltext: PDF; |
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