Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

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

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


University of Notre Dame

1. Nil Valls. Searches for Z' and Higgs Bosons Decaying into Hadronic Tau Pairs at CMS/LHC</h1>.

Degree: Physics, 2013, University of Notre Dame

An elegant solution to the mystery of electroweak symmetry breaking and the origin of mass was proposed in the 1960s, yet it has taken several generations of particle accelerators and detectors to discover the first strong candidate for the so-called Higgs boson, which is implied by the theory. A positive identification would complete the Standard Model (SM), the most successful description of elementary particles and interactions to date. Searches for the SM Higgs boson production in association with top-quark pairs will provide additional information on the likely SM Higgs boson detection by the ATLAS and CMS experiments at the LHC in 2012, as well as the only means of directly measuring its coupling to top quarks. The first CMS search for the SM Higgs boson decaying into hadronic tau pairs in association with top-quark pairs is presented in this dissertation: with 19.4 /fb of √s=8TeV pp collision data collected by the CMS experiment, the expected and observed upper limits on the product of the cross section and branching ratio for the ttH→τhτh process are roughly 13 times the SM background expectation. Solid experimental observations have exposed several limitations of the SM: it fails to provide a description of neutrino-flavor mixing, cold dark matter candidates, gravitation, and the matter-antimatter asymmetry, for example. Numerous models in beyond-the-Standard-Model theories (e.g., grand unification, extra dimensions) suggest the existence of new neutral gauge (Z’) bosons, some of which would appear with enhanced couplings to tau leptons. A search for sequential SM and ψ-model Z’ bosons decaying into tau pairs with 4.94±0.11 /fb of √s=7TeV pp collision data collected by the CMS experiment is also presented, the results of which show an incompatibility with such Z’ bosons with masses below 1.4 TeV/c² and 1.1 TeV/c² respectively at 95% C.L. Advisors/Committee Members: Antonio Delgado, Committee Member, Colin Jessop, Committee Member, Sylwia Ptasinska, Committee Member, Michael Hildreth, Committee Chair.

Subjects/Keywords: Zprime; Higgs; tau; top; hadronic; Z’

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Valls, N. (2013). Searches for Z' and Higgs Bosons Decaying into Hadronic Tau Pairs at CMS/LHC</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/wp988g8752p

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):

Valls, Nil. “Searches for Z' and Higgs Bosons Decaying into Hadronic Tau Pairs at CMS/LHC</h1>.” 2013. Thesis, University of Notre Dame. Accessed July 13, 2020. https://curate.nd.edu/show/wp988g8752p.

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

MLA Handbook (7th Edition):

Valls, Nil. “Searches for Z' and Higgs Bosons Decaying into Hadronic Tau Pairs at CMS/LHC</h1>.” 2013. Web. 13 Jul 2020.

Vancouver:

Valls N. Searches for Z' and Higgs Bosons Decaying into Hadronic Tau Pairs at CMS/LHC</h1>. [Internet] [Thesis]. University of Notre Dame; 2013. [cited 2020 Jul 13]. Available from: https://curate.nd.edu/show/wp988g8752p.

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

Council of Science Editors:

Valls N. Searches for Z' and Higgs Bosons Decaying into Hadronic Tau Pairs at CMS/LHC</h1>. [Thesis]. University of Notre Dame; 2013. Available from: https://curate.nd.edu/show/wp988g8752p

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


University of Notre Dame

2. David Michael Morse. A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-Proton Collisions at sqrt(s)=8 TeV</h1>.

Degree: Physics, 2013, University of Notre Dame

This dissertation describes a search for new physics that has been performed at the Compact Muon Solenoid experiment. The search makes use of an integrated luminosity ∫L=19.5/fb of data taken during the 2012 proton-proton collisions at center of mass energy sqrt(s)=8 TeV produced by the Large Hadron Collider near Geneva, Switzerland. The search has been performed on events with two photons, jets, and missing transverse energy. The final state for this search is motivated by the theory of gauge-mediated supersymmetry breaking but is sensitive to any new physics producing massive particles decaying via this channel. The dominant standard model backgrounds to this final state include quantum chromodynamics processes and electroweak processes involving W bosons. No excess above standard model backgrounds is observed. The results have been interpreted in the context of gauge-mediated supersymmetry in multiple model scans, resulting in 95% confidence level limits on signal production cross sections between 0.7 and 6.6 fb for a Bino-like neutralino and between 50 and 5000 fb for a Wino-like neutralino. The upper limits for the Bino-like case are the most stringent to date for gauge-mediated supersymmetry models. Advisors/Committee Members: Michael Hildreth, Committee Chair, Anthony Hyder, Committee Member, Christopher Kolda, Committee Member, Randal Ruchti, Committee Member.

Subjects/Keywords: missing energy; cms; missing transverse energy; notre dame; bino; met; limits; dissertation; photon; physics; susy; lhc; cern; high energy; phd; supersymmetry; wino

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Morse, D. M. (2013). A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-Proton Collisions at sqrt(s)=8 TeV</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/4x51hh65q2c

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):

Morse, David Michael. “A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-Proton Collisions at sqrt(s)=8 TeV</h1>.” 2013. Thesis, University of Notre Dame. Accessed July 13, 2020. https://curate.nd.edu/show/4x51hh65q2c.

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

MLA Handbook (7th Edition):

Morse, David Michael. “A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-Proton Collisions at sqrt(s)=8 TeV</h1>.” 2013. Web. 13 Jul 2020.

Vancouver:

Morse DM. A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-Proton Collisions at sqrt(s)=8 TeV</h1>. [Internet] [Thesis]. University of Notre Dame; 2013. [cited 2020 Jul 13]. Available from: https://curate.nd.edu/show/4x51hh65q2c.

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

Council of Science Editors:

Morse DM. A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-Proton Collisions at sqrt(s)=8 TeV</h1>. [Thesis]. University of Notre Dame; 2013. Available from: https://curate.nd.edu/show/4x51hh65q2c

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


University of Notre Dame

3. Patricia L. Maazouz. Reaction Dynamics and Charge Transfer in the Scattering of State-Selected Ions on Surfaces</h1>.

Degree: Chemistry and Biochemistry, 2004, University of Notre Dame

Investigating the detailed dynamics that govern gas-surface reactions is critical to understanding and predicting chemical behavior at the gas-solid interface. As energetic atomic and molecular ions scatter from surfaces, many fundamental chemical processes can be observed, including electron transfer, dissociation, and atom abstraction. The interactions of Br+(3P2) with Pt(111), Br2+(2Pg3/2, v=0 and v=2) with Pt(111), and NO+(X1S+) with oxygen-covered Al(111) provide three unique systems to investigate various reaction processes activated within the 5 – 105 eV energy regime. In contrast to conventional charge transfer theory, the scattering of Br+(3P2) and Br2+(2Pg3/2) on Pt(111) show a dramatic enhancement in the formation of negative ions at an impact velocity near 8 km/s. Coincident with this resonance, the anions scatter with additional translational energy. For the Br+ projectiles a three-site model is developed to fit the product velocity–, energy–, and angular–distributions. The observed scattering behaviors are consistent with a surface site-specific collision-induced deformation of the lattice that rebounds in phase with the departing projectile. The sensitivity of the emergence of Br– to the Br2+ incident energy suggests a collision-induced dissociation mechanism at higher collision energies and dissociative resonant neutralization at lower collision energies. The latter mechanism is further supported by the reduction of the Br– yield when the initial vibrational state changes from n=0 to n=2 at low collision energies. The strong electronic coupling between the motion of the platinum lattice and the surface electronic states responsible for charge transfer is further evidenced by the unique relationship between the surface temperature and the formation of negative ions. Energetic collisions of NO+(X1S+) with O/Al(111) results in a highly improbable abstraction reaction. The relative ion yields and mean translational energies of scattered NO2– are presented as a function of oxygen exposure and NO+ collision energy. The formation of NO2– is assigned to the direct, Eley-Rideal abstraction of an adsorbed O– atom by an incident NO molecule. These results suggest further experimental and theoretical investigations are necessary to fully understand the transient couplings that operate when reactive projectiles scatter on clean and adsorbate-covered metal surfaces. Advisors/Committee Members: Dan Gezelter, Committee Member, Greg Hartland, Committee Member, S. Alex Kandel, Committee Member, Dennis Jacobs, Committee Member, Michael Hildreth, Committee Chair.

Subjects/Keywords: electron transfer

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Maazouz, P. L. (2004). Reaction Dynamics and Charge Transfer in the Scattering of State-Selected Ions on Surfaces</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/7h149p30z5r

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):

Maazouz, Patricia L.. “Reaction Dynamics and Charge Transfer in the Scattering of State-Selected Ions on Surfaces</h1>.” 2004. Thesis, University of Notre Dame. Accessed July 13, 2020. https://curate.nd.edu/show/7h149p30z5r.

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

MLA Handbook (7th Edition):

Maazouz, Patricia L.. “Reaction Dynamics and Charge Transfer in the Scattering of State-Selected Ions on Surfaces</h1>.” 2004. Web. 13 Jul 2020.

Vancouver:

Maazouz PL. Reaction Dynamics and Charge Transfer in the Scattering of State-Selected Ions on Surfaces</h1>. [Internet] [Thesis]. University of Notre Dame; 2004. [cited 2020 Jul 13]. Available from: https://curate.nd.edu/show/7h149p30z5r.

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

Council of Science Editors:

Maazouz PL. Reaction Dynamics and Charge Transfer in the Scattering of State-Selected Ions on Surfaces</h1>. [Thesis]. University of Notre Dame; 2004. Available from: https://curate.nd.edu/show/7h149p30z5r

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

.