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You searched for +publisher:"University of Notre Dame" +contributor:("Chris Kolda, Committee Member"). Showing records 1 – 3 of 3 total matches.

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University of Notre Dame

1. Bryan Ostdiek. Searching for Electroweakino Dark Matter at a Hadron Collider</h1>.

Degree: Physics, 2016, University of Notre Dame

URL: https://curate.nd.edu/show/2801pg1768w 

Supersymmetry with R parity provides a stable dark matter candidate. However, over much of the parameter space, the dark matter candidate does not freeze out to the observed relic abundance. One method to achieve the observed relic abundance relies on the co-annihilation of multiple, nearly-degenerate electroweakino states. This so-called well tempering evades traditional collider searches because the compressed spectrum leaves soft decay products. I outline new strategies that takes advantage of this compressed spectrum and estimate its usefulness at the LHC and a future 100 TeV collider. The first strategy is based on final states with missing transverse energy, a photon, and a dilepton pair, \slashed{E}T + γ + ℓ+ℓ-. This search method performs best when the mass splitting between the heavier neutralinos and the lightest neutralino is less than the Z mass, which is when traditional search strategies break down. Using this new method, I find the LHC could discover a mixed bino-Higgsino with m\ ilde{χ2,30} ≤ sssim 190 ~ ≥ v and m\ ilde{χ2,30} - m ilde{χ10} ∼eq 30~ ≥ v with 600 fb-1 of 14 TeV data. While the signature of this signal is quite distinct from the backgrounds, triggering is the biggest set-back. Requiring an additional hard jet from initial (or final) state radiation can provide a trigger at the cost of signal rate. I explore the effects of boosting the electroweakinos off a hard jet at a 100~ ev collider; the background leptons and photons recoil proportional to the momentum of the jet, while the signal leptons and photons have momentum proportional to the mass splitting. A 100~ ev collider would provide a unique search strategy where one uses the most energetic machine to look for low energy events. In addition, I also examine an extension to the minimal supersymmetric standard model. This addition adds three SU(2)L triplet chiral superfields with Y=0,±1 and the superpotential respects a global SU(2)L \otimes SU(2)R broken only by the Yukawa interactions. The F terms from these extra fields help raise the mass of the Higgs to the observed value. Meanwhile, if the vacuum mantains the global SU(2)L \otimes SU(2)R, up to the ratio of the doublet vacuum expectation values, the ho parameter is protected at tree level. This allows for the triplet scalars to be light which opens the possibility of resonant s-channel funnels to set the observed relic abundance of dark matter. I show over a wide range of parameters that the triplets can help to set the dark matter abundance either through the s-channel funnels or well tempering with the bino. Advisors/Committee Members: Dinshaw Balsara, Committee Member, Chris Kolda, Committee Member, Michael Hildreth, Committee Member, Antonio Delgado, Research Director.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ostdiek, B. (2016). Searching for Electroweakino Dark Matter at a Hadron Collider</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/2801pg1768w

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Ostdiek, Bryan. “Searching for Electroweakino Dark Matter at a Hadron Collider</h1>.” 2016. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/2801pg1768w.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Ostdiek, Bryan. “Searching for Electroweakino Dark Matter at a Hadron Collider</h1>.” 2016. Web. 15 Jan 2021.

Vancouver:

Ostdiek B. Searching for Electroweakino Dark Matter at a Hadron Collider</h1>. [Internet] [Thesis]. University of Notre Dame; 2016. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/2801pg1768w.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ostdiek B. Searching for Electroweakino Dark Matter at a Hadron Collider</h1>. [Thesis]. University of Notre Dame; 2016. Available from: https://curate.nd.edu/show/2801pg1768w

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of Notre Dame

2. Dylan Menzies-Gow. Tests of Non-Standard Cosmological Theories</h1>.

Degree: Physics, 2006, University of Notre Dame

URL: https://curate.nd.edu/show/dv13zs28289 

This dissertation investigates some propositions that fall outside the main- stream of the standard big bang cosmology. We begin with partial evidence from the Cosmic Microwave Background (CMB) that the universe may be finite, com- pactified and flat, or at least nearly flat. The simplest interpretation of a flat universe is that it is infinite and non-compact. However, there are a great variety of ways that infinite universes can be “wrapped up’ and given a compact finite vol- ume, without the need to modify general relativity. Detailed analysis of the CMB could potentially tell us the nature of the compactification, except that there is considerable uncertainty over sources of error. Another approach is to correlate the positions of distant luminous objects. While this cannot probe so broad a set of possibilities, it may be more sensitive for those that it can. In this thesis a new technique is developed that is much more sensitive to the very-nearly flat cases than previous tests of this type. Application to existing catalogs rules out a compact dimension smaller than 90% of the present horizon radius. The test requires that the position of objects is corrected for relativistic aberration. This gives rise to a second piece of work that systemizes corrections for objects and also the microwave background. The final part looks at an unusual explanation for galaxy rotation curves. These are conventionally thought to be the result of a dark matter halo that Dylan R Menzies-Gow enshrowds each galaxy. Such dark matter also helps to account for the large quantity dark matter deduced from observations of the CMB. However, it has been suggested that the rotation curves could be a classical general relativistic effect, despite the non-relativistic velocities and densities involved. Such a claim is very unusual and has created considerable contraversy. The chapter presents a conclusive analysis to demonstrate that the suggested model is unphysical by implying an infinite mass for each galaxy. Advisors/Committee Members: James J. Kolata, Committee Member, Dinshaw Balsara, Committee Member, Chris Kolda, Committee Member, Don Howard, Committee Chair, Grant J. Mathews, Committee Member.

Subjects/Keywords: peculiar velocity; dark matter; topology; microwave background; rotation curves; cosmology; aberration

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Menzies-Gow, D. (2006). Tests of Non-Standard Cosmological Theories</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/dv13zs28289

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Menzies-Gow, Dylan. “Tests of Non-Standard Cosmological Theories</h1>.” 2006. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/dv13zs28289.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Menzies-Gow, Dylan. “Tests of Non-Standard Cosmological Theories</h1>.” 2006. Web. 15 Jan 2021.

Vancouver:

Menzies-Gow D. Tests of Non-Standard Cosmological Theories</h1>. [Internet] [Thesis]. University of Notre Dame; 2006. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/dv13zs28289.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Menzies-Gow D. Tests of Non-Standard Cosmological Theories</h1>. [Thesis]. University of Notre Dame; 2006. Available from: https://curate.nd.edu/show/dv13zs28289

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of Notre Dame

3. Joel Griffith. Modeling Electromagnetic Properties of Hadrons</h1>.

Degree: Physics, 2013, University of Notre Dame

URL: https://curate.nd.edu/show/qn59q239x1r 

Two problems at the intersection of atomic theory and particle phenomenology are investigated. In the first, the electric dipole moment (edm) of the neutron is calculated field-theoretically within the cavity approximation in terms of the edms of its constituent up and down quarks. A 17% overall reduction is found with respect to the naive SU(6) estimate of this relation, and no relativistic edm enhancement is found. This work is motivated by the existence of edm enhancement in relativistic atoms; a novel calculation of this enhancement effect in alkali atoms is presented using a modification of the Furry representation that extends standard screening effects to a field-theoretical framework. The calculation demonstrates the utility of this representation in many-body bound-state field theory. In the second problem, the polarizability of the proton in muonic hydrogen is calculated using another variation of the modified Furry representation, in this case for the purpose of generating nuclear structure corrections to the energy levels of the atom. The proton is modeled using the cavity approximation. The proton polarizability is found to agree with existing estimates using dispersion relation theory, indicating that this effect is incapable of resolving the outstanding proton size puzzle. Advisors/Committee Members: Jonathan Sapirstein, Committee Chair, Chris Kolda, Committee Member, John LoSecco, Committee Member, Carol Tanner, Committee Member.

Subjects/Keywords: paramagnetic atoms; two photon; proton radius

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Griffith, J. (2013). Modeling Electromagnetic Properties of Hadrons</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/qn59q239x1r

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Griffith, Joel. “Modeling Electromagnetic Properties of Hadrons</h1>.” 2013. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/qn59q239x1r.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Griffith, Joel. “Modeling Electromagnetic Properties of Hadrons</h1>.” 2013. Web. 15 Jan 2021.

Vancouver:

Griffith J. Modeling Electromagnetic Properties of Hadrons</h1>. [Internet] [Thesis]. University of Notre Dame; 2013. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/qn59q239x1r.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Griffith J. Modeling Electromagnetic Properties of Hadrons</h1>. [Thesis]. University of Notre Dame; 2013. Available from: https://curate.nd.edu/show/qn59q239x1r

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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