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Full-Text Articles in Physics

Final Muon Cooling For A Muon Collider, John Gabriel Acosta Castillo Jan 2017

Final Muon Cooling For A Muon Collider, John Gabriel Acosta Castillo

Electronic Theses and Dissertations

To explore the new energy frontier, a new generation of particle accelerators is needed. Muon colliders are a promising alternative if muon cooling can be made to work. Muons are 200 times heavier than electrons, so they produce less synchrotron radiation, and they behave like point particles. However, they have a short lifetime of 2.2 μs and the beam is more difficult to cool than an electron beam. The Muon Accelerator Program (MAP) was created to develop concepts and technologies required by a muon collider. An important effort has been made in the program to design and optimize a muon …


Effective Interactions Between Local Hopping Modulations On The Square Lattice, Huu T. Do Jan 2017

Effective Interactions Between Local Hopping Modulations On The Square Lattice, Huu T. Do

Electronic Theses and Dissertations

No abstract provided.


Compact Objects In Relativistic Theories Of Gravity, Hector Okada Da Silva Jan 2017

Compact Objects In Relativistic Theories Of Gravity, Hector Okada Da Silva

Electronic Theses and Dissertations

In this dissertation we discuss several aspects of compact objects, i.e. neutron stars and black holes, in relativistic theories of gravity. We start by studying the role of nuclear physics (encoded in the so-called equation of state) in determining the properties of neutron stars in general relativity. We show that low-mass neutron stars are potentially useful astrophysical laboratories that can be used to constrain the properties of the equation of state. More specifically, we show that various bulk properties of these objects, such as their quadrupole moment and tidal deformability, are tightly correlated. Next, we develop a formalism that aims …


Low-Frequency Emission Enhancement By Resonant Acoustic Metamaterials, Maryam Landi Jan 2017

Low-Frequency Emission Enhancement By Resonant Acoustic Metamaterials, Maryam Landi

Electronic Theses and Dissertations

Omnidirectional and directional acoustic emission enhancements, at low frequencies as well as broad frequency bands, are highly demanded in audio, medical ultrasonics, and underwater acoustics. Emission enhancement and controlling the directivity of an acoustic source is however restricted to the properties of the source. In particular, the size of the source, in comparison with the wavelength of the sound, plays a very dominant role in determining the quality of the emitted acoustic wave. Most problems arise when there is a small acoustic source emitting very low frequency sound with large wavelength. Prior studies have proposed several solutions to this problem …


Design Of A High Luminosity 100 Tev Proton Antiproton Collider, Sandra Jimena Oliveros Tautiva Jan 2017

Design Of A High Luminosity 100 Tev Proton Antiproton Collider, Sandra Jimena Oliveros Tautiva

Electronic Theses and Dissertations

Currently new physics is being explored with the Large Hadron Collider at CERN and with Intensity Frontier programs at Fermilab and KEK. The energy scale for new physics is known to be in the multi-TeV range, signaling the need for a future collider which well surpasses this energy scale. A 10 34 cm-2 s-1 luminosity 100 TeV proton-antiproton collider is explored with 7× the energy of the LHC. The dipoles are 4.5 T to reduce cost. A proton-antiproton collider is selected as a future machine for several reasons. The cross section for many high mass states is 10 times higher …


A Thermal Enclosure Prototype For A Suspended Inertial Sensor, Mohammad Afrough Jan 2017

A Thermal Enclosure Prototype For A Suspended Inertial Sensor, Mohammad Afrough

Electronic Theses and Dissertations

Although Ligo has detected six gravitational waves so far, people are still conducting research to improve the sensitivity of the detectors in different aspects. At low frequency band, one of the main sources of noise is seismic vibration. Lowering the noise level in this band, helps us to follow the coalescence of compact binary systems earlier in their transformation and increase the signal-to-noise ratio. It also allows us to detect merger of more massive objects. Hence, an isolation system is required to reduce the seismic noise. As a part of isolation system (which can be a passive or an active …


Searching For New Physics In The B-Quark’S And Higgs’ Sectors Via Kinematic And Angular Distributions, Shanmuka Shivashankara Jan 2017

Searching For New Physics In The B-Quark’S And Higgs’ Sectors Via Kinematic And Angular Distributions, Shanmuka Shivashankara

Electronic Theses and Dissertations

The kinematic and angular distributions are calculated for the decay Λ b → Λclν l. Deviations from the standard model are expected given the apparent lepton flavor violation in the process B → D(*)+ τ – ντ. Including these measured deviations from the SM, the upper and lower bounds for R Λb = B(Λ b → Λcτ ντ) / B(Λ b → Λcl νl) are calculated along with other observables for a variety of new physics Lorentz structures. Distributions are also calculated for H → W –W+*(or H +*) → τ–ν ττ+ντ via Type II and leptophilic 2HDM’s. Although, the …