CERN Accelerating science

CERN Theses

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2018-12-10
18:53
Improving the slow extraction efficiency of the CERN Super Proton Synchrotron / Brunner, Kristof
In the last few decades, the use of particle accelerators became widespread not only in different fields of physics (eg [...]
CERN-THESIS-2018-278 - 47 p.

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2018-12-10
02:35
Optimisation studies and data-driven background estimation in searches for the supersymmetric partner of the top quark with the ATLAS Detector at the LHC / Miano, Fabrizio
This thesis presents the search for the supersymmetric partner of the top quark in \sqrt{s} = 13 TeV proton-proton collisions at the LHC using data collected by the ATLAS detector in 2015 and 2016 [...]
CERN-THESIS-2018-277 - 151 p.

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2018-12-08
05:55
Searching for Dark Matter with Boosted Higgs Decays in Proton-Proton Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector / Whallon, Nikola Lazar
If Dark Matter particles interact with Standard Model particles, it could be possible to pair produce Dark Matter particles in association with a detectable Standard Model particle at a collider such as the LHC [...]
CERN-THESIS-2018-276 - 197 p.

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2018-12-05
04:22
Effective field theory interpretation for measurements of top quark pair-production in association with a W or Z boson / Woodard, Anna Elizabeth
Using effective field theory, the effects of new particles or interactions can be captured in a model-independent way by supplementing the standard model Lagrangian with higher-dimensional operators [...]
CERN-THESIS-2018-275 - 211 p.

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2018-12-05
01:14
Measurement of b-quark fragmentation fraction ratios at the CMS experiment: a key ingredient for the $B^{0}_{s}\rightarrow \mu^{+}\mu^{-}$ rare decay analysis / Alves, Bruno
The current theoretical basis for Particle Physics, the Standard Model, although extremely successful in its predictions, faces a series of limitations [...]
CERN-THESIS-2018-274 - 100 p.

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2018-12-03
18:25
Search for supersymmetric partners of the top quark in models with compressed mass spectra with the CMS Detector / Navid K. Rad
Supersymmetry (SUSY) is one of the most promising theories for physics beyond the standard model as it explains many of the current problems with the standard model of particlephysics (SM) [...]
CMS-TS-2018-036 ; CERN-THESIS-2018-273. - 2018. - 151 p.

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2018-12-03
13:01
A Distributed Analysis Framework for Heterogeneous Data Processing in HEP Environments / Boychenko, Serhiy
During the last extended maintenance period, CERNs Large Hadron Collider (LHC) and most of its equipment systems were upgraded to collide particles at an energy level almost twice higher compared to previous operational limits, significantly increasing the damage potential to accelerator components [...]
CERN-THESIS-2017-438 - 168 p.

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2018-11-30
16:04
Real-time reconstruction of tracks in the Scintillating Fibre Tracker of the LHCb Upgrade / Di Luca, Andrea
This thesis presents the first study of the performance of real-time reconstruction of tracks in the Scintillating Fibre Tracker detector achievable with the artificial retina algorithm, using fully simulated events at the LHCb Upgrade (LHC Run 4) conditions [...]
CERN-THESIS-2018-272 etd-09262018-163515. - 129 p.

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2018-11-29
16:35
Measurement of the $CP$ violation parameter $A_\Gamma$ in $D^0\rightarrow K^+K^-$ and $D^0\rightarrow \pi^+\pi^-$ decays with LHCb Run 2 data / Pajero, Tommaso
Time-dependent $CP$ asymmetries in the decay rates of the $D^0$ and $\overline{D}^0$ mesons into the $CP$-symmetric, singly Cabibbo-suppressed final states $K^+K^-$ and $\pi^+\pi^-$ are measured in $pp$ collisions collected by the LHCb experiment in 2015 and in 2016 at the centre-of-mass energy of $ [...]
CERN-THESIS-2017-439. - 125 p.

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2018-11-29
16:15
Search for High-Mass Top Quark Pair Resonances with the CMS Experiment / Mc Lean, Christine Angela
I present a search for new massive particles decaying to a pair of top quarks with the CMS detector at the LHC, using 36 fb$^{-1}$ of proton-proton collision data recorded in 2016, at a center-of-mass energy of 13 TeV [...]
CERN-THESIS-2018-270 - 166 p.

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