Books

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2023-11-30
14:36
[PUBDB-2023-07363] Book/Proceedings

Measurements of $|V_{cb}|$ and $|V_{ub}|$ from Belle and Belle~II
20th International Conference on B-Physics at Frontier Machines, BEAUTY 2023, Clermont-FerrandClermont-Ferrand, France, 7 Jul 2023 - 7 Jul 20232023-07-072023-07-07 Proceedings of Science ()  GO
This proceeding summarizes recent measurements of the Cabibbo-Kobayashi-Maskawa (CKM)matrix elements |𝑉𝑐𝑏 | and |𝑉𝑱𝑏 | at the Belle and Belle II experiments. It provides insights derivedfrom both exclusive and inclusive determinations. [...]
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2023-11-27
15:31
OpenAccess [PUBDB-2023-07215] Book/Dissertation / PhD Thesis
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Differential ratio measurements of $\mathrm{t\bar{t}\gamma}\,/\,\mathrm{t\bar{t}}$ and a search for exclusive $\mathrm{t\bar{t}}$ with the CMS experiment
[CERN-THESIS-2023-256; DESY-THESIS-2023-019]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 207 pp. () [10.3204/PUBDB-2023-07215] = Dissertation, UniversitĂ€t Hamburg, 2023  GO
In this thesis, measurements performed using proton-proton collision data at $\sqrt{s} = 13$TeV collected by the CMS experiment at the CERN LHC, in the years 2016, 2017, and 2018, are presented. The data correspond to an integrated luminosity of 138$~\mathrm{fb}^{-1}$.New results on top quark pair production in association with a photon ($\mathrm{t\bar{t}\gamma}$) are presented. [...]
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2023-11-08
10:23
OpenAccess [PUBDB-2023-06679] Book/Dissertation / PhD Thesis
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Electronics at Optical Frequencies
[DESY-THESIS-2023-018]
Hamburg : Verlag Deutsches-Elektronen Synchrotron, DESY-THESIS 146 pp. () [10.3204/PUBDB-2023-06679] = Dissertation, UniversitĂ€t Hamburg, 2023  GO
With the advent of ultrafast optics and controllable waveforms consisting of only a few oscillations of the electric field, the idea of controlling electrons at the frequency of light was born. This established the potential of using a controlled optical waveform to switch electronic circuit elements at the frequency of an optical wave, typically on the order of 0.1 to 1 petahertz(1015 Hz). [...]
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2023-10-26
10:38
OpenAccess [PUBDB-2023-06408] Book/Dissertation / PhD Thesis
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Double parton scattering: parton correlations and their scale evolution
[DESY-THESIS-2023-016]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 183 pp. () [10.3204/PUBDB-2023-06408] = Dissertation, UniversitĂ€t Hamburg, 2023  GO
Double parton scattering (DPS) describes a process in hadron-hadron scattering in which two partons are extracted from each initial hadron and then initiate hard scattering processes separated by a finite distance. After factorising the hadronic process, one obtains parton distributions functions that characterise the behaviour of partons inside the hadron at non-perturbative scales. [...]
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2023-10-23
13:33
OpenAccess [PUBDB-2023-06337] Book/Dissertation / PhD Thesis
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Improved Pulse Characteristics and Power Scaling of Drive Lasers for Laser-Wakefield Acceleration
[DESY-THESIS-2023-015]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 192 pp. () [10.3204/PUBDB-2023-06337] = Dissertation, UniversitĂ€t Hamburg, 2023  GO
Laser-wakefield acceleration (LWFA) is a promising, emerging technology for future accelerator-based X-ray light sources, which are essential tools in various fields of science, industry and medicine. In laser-wakefield acceleration, an intense laser pulse drives a plasma wave that supports high accelerating field gradients. [...]
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2023-10-18
13:34
OpenAccess [PUBDB-2023-06263] Book/Dissertation / PhD Thesis
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Pixel-Strip Modules for the CMS Tracker Phase-2 Upgrade:From DAQ test system development to module assembly and qualification
[DESY-THESIS-2023-014]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 217 pp. () [10.3204/PUBDB-2023-06263] = Dissertation, UniversitĂ€t Hamburg, 2023  GO
The Large Hadron Collider (LHC) will undergo a major “High Luminosity” upgrade with the goal of delivering a peak instantaneous luminosity of 5 − 7.5 × 10^34 cm−2s−1 by 2029. In order for the CMS experiment to cope with the higher radiation levels and data rates, the current CMS Silicon Tracker will be replaced. [...]
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2023-10-18
12:07
OpenAccess [PUBDB-2023-06261] Book/Dissertation / PhD Thesis
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Measurement and NNLO QCD analysis of jet production in deep inelastic scattering at ZEUS
[DESY-THESIS-2023-013]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 223 pp. () [10.3204/PUBDB-2023-06261] = Dissertation, UniversitĂ€t Hamburg, 2023  GO
A measurement of inclusive jet cross sections in high-Q2 neutral current deep-inelastic scatteringis performed using data collected by the ZEUS detector at the HERA e±p collider. The datawere taken in the years 2004 to 2007 at a centre-of-mass energy of 318 GeV and correspond toan integrated luminosity of 347 pb−1. [...]
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2023-10-11
16:19
OpenAccess [PUBDB-2023-06161] Book/Dissertation / PhD Thesis
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A Discrete Vlasov Approach to Coherent Collective Instabilities in FEL-Injectors via Perturbation Theory and Semi-Lagrangian Simulation
[DESY-THESIS-2023-012]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 181 pp. () [10.3204/PUBDB-2023-06161] = Dissertation, UniversitĂ€t Hamburg, 2023  GO
In free-electron laser injectors the so-called microbunching instability can severely degrade the beam quality of electron bunches and therefore negatively impact the performance of the free-electron laser. Precise understanding of the microbunching process is required to develop mitigation strategies that minimize the negative impact of the instability.In this work, two approaches of investigating the microbunching instability are presented – one analytical and one numerical. [...]
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2023-09-04
11:01
OpenAccess [PUBDB-2023-05438] Book/Report

First results from HERA
[DESY-92-190]
56 pp. () [10.3204/PUBDB-2023-05438]  GO
The new electron-proton collider HERA at DESY has been put into operation in 1992 together with the experiments H1 and ZEUS. With HERA, high energy physics has entered a new territory far beyond the reach of previous lepton-nucleon scattering experiments. [...]
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2023-08-15
10:23
OpenAccess [PUBDB-2023-05059] Book/Bachelor Thesis
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Programmpaket zur Strahlenbasierten Optimierung einer HF-Photogun
[DESY-THESIS-2023-017]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 28 pp. () [10.3204/PUBDB-2023-05059] = Bachelorarbeit, Brandenburgische Technische UniversitĂ€t Cottbus-Senftenberg, 2023  GO
In einer Photogun wird mit einem Laserpuls ein Elektronenpaket aus einer Photokathode herausgelöst, und sofort in einer KavitĂ€t auf hohe Energie beschleunigt. Zur StrahlfĂŒhrung dient ein Solenoidmagnet. [...]
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