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Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
Search For Contact Interactions Using The Dimuon Mass Spectrum In P-P Collisions At Sqrt(S) = 8 Tev At Cms, Chamath Kottachchi
Search For Contact Interactions Using The Dimuon Mass Spectrum In P-P Collisions At Sqrt(S) = 8 Tev At Cms, Chamath Kottachchi
Wayne State University Dissertations
The mass hierarchy problem associated with the standard model suggests that there might be more fundamental particles in nature. If quarks and leptons have substructures, known as preons, the manifestation of compositeness can be a four-fermion contact interaction. The experimental signal for contact interactions is a non-resonant enhancement of the number of events in the high-mass region of the dimuon mass spectrum. This dissertation describes a detailed search strategy for contact interactions using the Compact Muon Solenoid experiment. The dimuon mass spectrum above 300 GeV has been studied using the data collected in 2012 at sqrt(s) = 8 TeV corresponding …
Collective Flow And Azimuthally Differential Pion Femtoscopy With The Alice Experiment At The Lhc, Vera Reneee Loggins
Collective Flow And Azimuthally Differential Pion Femtoscopy With The Alice Experiment At The Lhc, Vera Reneee Loggins
Wayne State University Dissertations
Since 2009, the Large Hadron Collider (LHC) at European Organization
for Nuclear Research (CERN) has been conducting experiments in $pp$,
Pb-Pb, as well as $p$-Pb collisions with the center of mass energy
ranging $\sqrt{{s}_{NN}}=0.9-5.05$~TeV. In this thesis, both,
estimates of background correlations in anisotropic flow, $v_1-v_5$,
measurements
in Pb-Pb collisions at
$\sqrt{{s}_{NN}}=2.76$~TeV, and azimuthally differential pion femtoscopy
of Pb-Pb collisions are reported.
Two particle azimuthal correlations are statistically the most precise
method of measuring anisotropic flow. The main drawback of this method
is its sensitivity to the non-flow correlations, which unlike real
flow, do not have geometrical origin. Non-flow contribution …
Using Large-Angle Beamstrahlung To Detect And Diagnose Colliding Beams For Luminosity Optimization, Hussein Farhat
Using Large-Angle Beamstrahlung To Detect And Diagnose Colliding Beams For Luminosity Optimization, Hussein Farhat
Wayne State University Dissertations
The large-angle-beamstrahlung is a very effective technique that can be used to monitor two crossing beams. Monitoring the beam helps in analyzing and studying the beams profiles, allowing beams adjustments, and eventually leading to a perfect beams collision. The perfect beam collision results in a higher luminosity; as a result, a high particles production rate and new physics can be discovered.
Correlation Effects In Nanoparticle Composites: Percolation, Packing And Tunneling, Rupam Mukherjee
Correlation Effects In Nanoparticle Composites: Percolation, Packing And Tunneling, Rupam Mukherjee
Wayne State University Dissertations
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Nanostrucured Lithium Iron Phosphate As Cathode Material For Lithium Ion-Batteries, Khadije Bazzi
Nanostrucured Lithium Iron Phosphate As Cathode Material For Lithium Ion-Batteries, Khadije Bazzi
Wayne State University Dissertations
Lithium-ion batteries are the power source of choice for portable electronics, power tools and electric-based transportation. This outstanding commercial success has spawned great international interest in applying this technology to systems that demand higher power, such as the electric component of hybrid, extended range, and electric vehicles. This would require new electrode materials that are less expensive, more energetic, and more environmentally friendly than the present ones. Of particular interest is the olivine-structured LiFePO4 cathode developed by Goodenough and co-workers, which offers several appealing features, such as a high, flat voltage profile and relatively high theoretical specific capacity (170 mAhg−1), …
Large-Angle Beamstrahlung: Simulation And Diagnostics, Ryan Stephen Gillard
Large-Angle Beamstrahlung: Simulation And Diagnostics, Ryan Stephen Gillard
Wayne State University Dissertations
LARGE-ANGLE BEAMSTRAHLUNG: SIMULATION AND DIAGNOSTICS
by
RYAN S. GILLARD
May 2014
Advisor: Dr. Giovanni Bonvicini
Major: Physics
Degree: Doctor of Philosophy
Luminosity is paramount in high energy physics research, therefore it is critical to optimize it. Particle beams are complex and orbit in a complicated fashion therefore they don't always collide as intended thus reducing our chance of discovery. Simulations and calculations of the beam-beam radiation or beamstrahlung can provide crucial insight into the collision geometry. Combined with an optics box that can collect and analyze this radiation, this could be an extremely valuable tool leading to correction of the …
Multiparticle Correlations In Pb--Pb Collisions At \Snn=2.76 Tev, Jocelyn Mlynarz
Multiparticle Correlations In Pb--Pb Collisions At \Snn=2.76 Tev, Jocelyn Mlynarz
Wayne State University Dissertations
Quantum Chromodynamics, which describe the interactions of quarks and gluons, have been found not to violate global parity symmetry. However, the possibility
of local parity violations due to transitions in the vacuum state of QCD is not excluded. The effects of these parity violations could be measured in the
hot and dense medium created in the ultrarelativistic heavy ion collisions experiment conducted at the Large Hadron Collider, called a Quark-Gluon Plasma, in which
the quarks that compose most of ordinary matter are deconfined. In the strong magnetic fields which permeate the QGP in non-central collisions, parity violation
would express itself …
Weak Decay Studies From An Effective Theory Standpoint, Aditya Yechan Gunja
Weak Decay Studies From An Effective Theory Standpoint, Aditya Yechan Gunja
Wayne State University Dissertations
In this doctoral dissertation I discuss the phenomenology of some weak interaction decays using a model independent approach by employing effective field theories. I discuss the soft photon contribution and background effect to the rare dimuonic decay of the neutral B meson. I also study some radiative exclusive W boson decays in the standard model in the context of pQCD and SCET. Additionally I invoke leptonic decays of charged mesons to constrain two general models of light dark matter.
Measurement Of Branching Fractions Of Rare Semi-Leptonic Ds Decays Ds → Π0 L Ν, Ds →Ρ L Ν, Ds →Ks L Ν (Near ϒ (4s), ϒ (5s)) At Belle, Sudeshna Ganguly
Measurement Of Branching Fractions Of Rare Semi-Leptonic Ds Decays Ds → Π0 L Ν, Ds →Ρ L Ν, Ds →Ks L Ν (Near ϒ (4s), ϒ (5s)) At Belle, Sudeshna Ganguly
Wayne State University Dissertations
In Particle physics, a flavor-less meson whose constituents are a quark and an anti-quark is known as quarkonium. Mesons which are formed by a bound state of charm quark and anti-charm quark are known as charmonium states. Different inspections of exotic charmonium states have been understood as 4-quark states. Charmonium states are produced via e+e− annihilation. We search at Belle, based on 119000 tagged events in the ϒ (4S) and ϒ (5S) energy regions, to look for Ds → π0 l ν, Ds →ρ l ν, Ds →Ks l ν ; considering the electron candidates as well the heavy electron …