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CERN Theses

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2025-04-20
16:04
Interpreting flavour tagging performance in CMS using Shapley value analysis / Gupta, Kaushik
Collisions of particles at Large Hadron Collider (LHC) produce jets, which are sprays of particles that originate from quarks and gluons [...]
CERN-THESIS-2025-035 - 2025 - 47.


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2025-04-15
10:58
Improved machine learning models for local optics corrections in the LHC triplet magnets / Kravishvili, Elene
The thesis aims to develop a beam optimization process in LHC, particularly the correction of the triplet magnet at each interaction point [...]
CERN-THESIS-2024-373 - 2024 - 56.


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2025-04-15
09:13
Search for Higgs boson pair production in the two photons plus two bottom quarks final state using partial Run-3 proton-proton collision data with the ATLAS detector / Montereali, Federico
A search for the Standard Model (SM) Higgs boson pair production in the $b\bar{b}\gamma\gamma$ final state is presented, using data from Run-II (2015–2018, $\sqrt{s}=13$ TeV, 140 fb$^{-1}$) and partial Run-III (2022–2023, $\sqrt{s}=13.6$ TeV, 59 fb$^{-1}$) collected with the ATLAS detector at th [...]
CERN-THESIS-2025-031 - 2025 - 175.


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2025-04-11
06:30
Transition Crossing by Means of Stable Islands / Wang, Sabrina
The phenomenom of transition energy crossing might generate adverse effects to the quality of charged-particle beams in circular accelerators that is hard to avoid, and has been known to introduce potentially adverse disturbance to the longitudinal dynamics of a beam of charged particles [...]
CERN-THESIS-2023-437 - 2023 - 53.


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2025-04-09
17:26
First observation and branching fraction measurement of the $\Sigma^{+} \to p \mu^{+} \mu^{-}$ decay at LHCb / Martelli, Gabriele
In this thesis, the first significant observation of the $\Sigma^{+} \to p \mu^{+} \mu^{-}$ decay and the measurement of the branching fraction are presented [...]
CERN-THESIS-2024-372 - 2024 - 159.


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2025-04-08
16:42
Design of a neon dry-cooled counter-flow heat exchanger current lead / Salla, Ott
CERN-THESIS-2025-029 - 2025 - 95.


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2025-04-08
16:24
Measurement of Thermal Conductivity of High-Temperature Superconducting Tapes under Cryogenic Conditions / Wuestner, Luis Alexander
In high-energy particle accelerators such as the Large Hadron Collider (LHC) at CERN, reducing the secondary electron yield (SEY) of the beam screen is becoming increas-ingly important, as electron cloud formation caused by synchrotron radiation can affect beam stability and increase the cryogenic l [...]
CERN-THESIS-2025-028 - 2025 - 87.


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2025-04-08
11:00
Analysis of very forward neutral particle spectra with the LHCf experiment at the LHC / Piparo, Giuseppe
Cosmic rays, especially ultra-high energy cosmic rays (UHECRs), have been the subject of extensive study due to their relevance to astrophysics and particle physics [...]
CERN-THESIS-2024-371 - 2024 - 185.


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2025-04-03
17:27
Studies of $\phi$ Meson Production in Fixed-Target pNe Collisions at LHCb / Fabiano, Federica
This thesis presents the studies of the $\phi$ meson production in proton-Neon fixed-target collisions at a centre-of-mass energy $\sqrt{s_{NN}}$=68.5~GeV, using the LHCb detector at CERN [...]
CERN-THESIS-2024-370 - 2025 - 174.


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2025-04-03
10:05
Measurement of the coherently produced J/ψ meson in PbPb collisions at LHCb Scientific Disciplinary Sector(s) / Belin, Samuel
The photoproduction at low transverse momentum of $J/\psi$ events in PbPb peripheral collisions at $\sqrt{s_{NN}}=5.02$TeV with the LHCb detector is investigated [...]
CERN-THESIS-2020-426 - 2021 - 163.


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