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 16 of 16 for “"Missing Energy"”.
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Study of the production processes of top quarks and missing energy predicted by the Standard Model and its extensions, in leptonic final states with the CMS detector at the LHC using machine learning techniques
Durante el desarrollo de la tesis se han realizado medidas de procesos del Modelo Estándar (ME) y búsquedas de procesos más allá del ME relacionadas con el quark top en estados finales con leptones. Para ello, se han utilizado datos de colisiones protón-protón producidas en el LHC y recogidas por …
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Low Energy Search For Physics Beyond The Standard Model
… Matter production in heavy meson decays with missing energy $ \dslash E$ in the final state, such as $B_q (D^0)\to\dslash E$ and $B_q (D^0) \to \gamma \dslash E$ was provided. It was argued that such transitions can be studied at the current flavor factories (and future super-flavor factories) …
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Reconstructing the Top Quark in a Search for a Pair-Produced Supersymmetric Partner in the All-Hadronic plus Missing Energy Final State Using $139$~$\text{fb}^{-1}$ of $\sqrt{s}=13$~TeV Proton-Proton Collisions Delivered by the Large Hadron Collider and Collected by the ATLAS Detector
… and was built to probe the tera-electron-volt energy scale in search of New Physics. ATLAS is one of several international collaborations at CERN and uses a 7,000-ton general purpose detector to collect collision data from the LHC. The top quark is the most massive particle under the Standard …
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Suche nach dem Higgs-Boson in hadronischen Endzuständen mit fehlender Energie am L3-Experiment bei LEP
… and which were collected in a center-of-mass energy range from 189 GeV to 209 GeV. The Higgs boson searches presented here analyse the data with regard to hadronic events with missing energy, since the visible energy is reduced compared to the total energy given by the LEP collider. According …
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Supersymmetric jets from Z boson decay and radiative decays of heavy quarkonium
… to be discovered in future colliders is missing energy /momentum combined with certain characteristic jet angular and energy distributions. We study the squark production and decay process at the parton level and carry out a Monte Carlo simulation of the fragmentation of the quarks into …
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Precision measurement of and search for dark matter in the transverse momentum spectra of Z bosons
… a Z boson produced in association with large missing transverse momentum is presented. The results of this search are interpreted in the context of several dark matter models: generic spin-0 or spin-1 mediators, invisible decays of a Higgs-like boson, unparticles, and large extra spatial …
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Investigation of the giant resonance region of 1̳2̳C with (e,e'[gamma])
… covering the 13 to 30 MeV region. By forming missing energy spectra, cross sections, both differential and integrated over the giant resonance region, were obtained for (e, e'1) in which the nucleus exits in the ground state or in one of the first two excited states at 4.44 MeV and 7.65 MeV.
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Placing limits on the Higgs production cross section at the tevatron using the H to W+W- to l+l- decay channel
… event signature consists of ee, eu, or uu with missing energy from undetected neutrinos. After an evaluation of alternative techniques, a neural net was selected as the best method for increasing the sensitivity of the measurement. The BFGS neuralnet training technique was selected as the most …
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Study of the quasielastic ³He(e,e'p) reaction at Q² = 1.5 (GeV/c)² up to missing momenta of 1 GeV/c
… in perpendicular coplanar kinematics, with energy and momentum transfer by the electron fixed at 837 MeV and 1500 MeV/c respectively, at three beam energies of 1255, 1954 and 4807 MeV. ³He(e,e'p)D and ³He(e,e'p)pn cross sections and distorted spectral functions were measured up to missing …
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Search for new heavy charged gauge bosons
… Chicago/USA) is operating at a center-of-mass energy of 1.96 TeV since March 2001. This analysis uses data taken with the D0 detector until February 2006 corresponding to an integrated luminosity of about 1 inverse femtobarn. Using this dataset, a search for a new heavy charged gauge boson W' …
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Collider phenomenology of heavy neutrinos
… having mass in the Electroweak scale at the high energy colliders. Based on a simple realization of inverse seesaw model we fix the model parameters to reproduce the neutrino oscillation data and to satisfy the other experimental constraints. We assume two flavor structures of the model and the …
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Study of the ¹²C(e,e'p) reaction in a correlations dominant regime with Q² = 2.0 (GeV/c)² and XB̳ > 1
… spectrometer was changed to cover a range of missing momentum values, ~Pm ~ 200 - 650 MeV/c; this resulted in three different datasets. This thesis presents the analysis and results of the (e, e'p) reaction channel. The motivation of the experiment is discussed and a description of the …
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Implementation of a model independent search for new physics with the CMS detector exploiting the world-wide LHC computing grid
… content (muons, electrons, photons, jets, missing energy) into so called event classes. A broad data scan is performed by investigating distributions searching for significant deviations from the Standard Model. Systematic uncertainties are rigourously taken into account within the …
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Commissioning of the CMS muon detector and development of generic search strategies for new physics
… content (muons, electrons, photons, jets, missing energy) into so called event classes. A broad scan of various distributions is performed, identifying significant deviations from the SM Monte Carlo simulation. The importance of systematic uncertainties is outlined, which are taken into …
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Analysis of JLab E12-14-012 Ti(e,e′p) Data and Determination of the Ti Spectral Function
… The reconstruction of neutrino flavors and energy through interactions with Argon is a critical issue for assuring the DUNE success. The neutrino-Argon nuclear cross section is one of the biggest sources of uncertainty in measuring possible Charge-Parity Violation (CPV) in the neutrino (ν) …
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Electron reconstruction in simulated Pb+Pb events in CMS
… up a new window into physics at a unprecedented energy. With the new energy range, a lot of exciting new physics can be examined. The search for the HIGGS boson, which arises from scalar field and is postulated to account for the mass of vector bosons, is one of the main goals of the experiment. …