Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 306 for “"LHC"”.
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Jet Fragmentation at the LHC
Run II at the LHC is pushing the energy and luminosity frontiers, and challenging the theory community to develop new tools both to increase the precision of our predictions and to expand their scope to match measurements of a more diverse set of observables. In this work, we describe the use of a …
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Particle Physics in the LHC Era
… the past four years the Large Hadron Collider (LHC) has made more precise measurements than ever before. Currently the SM of particle physics is known to have excellent agreement with these measurements. As a result of this agreement with data, the SM continues to play such a central role in …
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Effective field theories for the LHC
In this thesis I study applications of effective field theories to understand aspects of QCD jets and their substructure at the Large Hadron Collider. In particular, I introduce an observable, D2 , which can be used for distinguishing boosted W/Z/H bosons from the QCD background using information …
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Monte-Carlo event generation for the LHC
This thesis discusses recent developments for the simulation of particle physics in the light of the start-up of the Large Hadron Collider. Simulation programs for fully exclusive events, dubbed Monte-Carlo event generators, are improved in areas related to the perturbative as well as …
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CP-violation in cascade decays at the LHC
… supersymmetric cascade decay chains at the LHC. Asymmetries composed by triple products of momenta of the final state particles are sensitive to CP-violating effects. We analytically calculate the cascade decays including the relevant spin correlations to compute the parton level asymmetry. …
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Supersymmetry at the dawn of the LHC era
… production of Higgs bosons in SUSY events at the LHC can be a striking signal of multiple SUSY-breaking. In the context of anomaly mediation in supergravity, I demonstrate how goldstino couplings can be used as a probe of the underlying symmetry structure of unbroken SUSY in anti-de Sitter space. …
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Jet Quenching in Relativistic Heavy Ion Collisions at the LHC
… data collected with the ATLAS detector at the LHC from the 2010 Pb ion run corresponding to a total integrated luminosity of 7 µ b⁻¹. The results are obtained using fully reconstructed jets using the anti-k t algorithm with a per-event background subtraction procedure. A centrality-dependent …
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Circadian rhythms in Lhc gene expression in pharbitis nil chois
The steady state mRNA levels of Lhc genes in Pharbitis nil were investigated using the wheat Lhcbl *1 (cabi) gene as a heterologous probe. A circadian rhythm in P. nil Lhc gene expression was detected in constant light. This rhythm was initiated or reset to a constant phase by the initial light-on …
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Jet quenching in the compact muon solenoid at the LHC
… to analyzing the data from Pb-Pb runs at the LHC. Disclaimer: The work on this thesis does not model the CMS detector geometry with the accuracy required for official analyses, which are fully representative of the CMS detector capabilities. Such analyses require of the full CMS simulation …
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Massive stable charged particle signatures in simulations at the LHC
… Hierarchy problem. The Large Hadron Collider (LHC) at CERN will allow the TeV energy range to be explored where black hole production might begin to occur at a significant rate as predicted by Large Extra Dimension (LED) models. The LED models center around the concept of a N dimensional …
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Factorization at the LHC : from PDFs to initial state jets
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2010.
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Physics performance studies for the ALICE experiment at the CERN LHC
… experiment at the CERN Large Hadron Collider (LHC) will explore a primordial state of matter that existed in the early Universe. Resonance production at the LHC is of great interest in the study of the phase state of hadronic matter known as Quark Gluon Plasma (QGP). Results are presented on …
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Jet quenching in heavy-ion collisions at LHC with CMS detector
… of jet pairs as measured by the CMS detector at LHC. The implications of the results are discussed by comparison of simple models with data. It is observed that the geometrical configuration of the dijets and the nuclear collision region plays an important role in the correlations between the …
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Measurement of quantum numbers balance and fluctuations with ALICE at the LHC
L'abstract è presente nell'allegato / the abstract is in the attachment
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Designing the four rod crab cavity for the high-luminosity LHC upgrade
… for a novel compact crab cavity for the HL-LHC upgrade at CERN, Geneva. The LHC requires 400MHz RF cavities that can provide up to 10MV transverse gradient across two to three cavities with suitably low surface fields for continual operation. As a result, a cavity design was required that …
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Local Signal Processing of the ALICE Transition Radiation Detector at LHC (CERN)
… detector of the heavy ion experiment ALICE at LHC (CERN) integrates parts of the data acquisition and trigger system. Therefore, a multi chip module has been developped which incorporates two microchips. Detector signals are preamplified and shaped (Preamplifier and Shaper Chip, PASA). …
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A study of tau identification with the CMS detector at the LHC
… (CMS) detector on the Large Hadron Collider (LHC) at CERN. The two components of particle identification, efficiencies of [tau] identification from generator level information, along with fake rates of the current default algorithm have been determined and analyzed for a photon plus jets …
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Drift Tubes Trigger System of the CMS Experiment at LHC : Commissioning and Performances
In this thesis the performances of the CMS Drift Tubes Local Trigger System of the CMS detector are studied. CMS is one of the general purpose experiments that will operate at the Large Hadron Collider at CERN. Results from data collected during the Cosmic Run At Four Tesla (CRAFT) commissioning …
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