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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 20 of 472 for “"Quark"”.
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Cold, dense quark matter
This thesis discusses the properties of cold quark matter as exists in the core of massive neutron stars, with baryon densities several times of nuclear saturation density, n_0 ≈ 0.16 fm^-3, at zero temperature. Specifically, we study effective quark models, the symmetry pattern of different quark …
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Analysis of Beauty Quark Hadronization in Vacuum and Quark-Gluon Plasma with CMS
… These results will help elucidate the beauty quark hadronization mechanisms in vacuum and quark-gluon plasma at the LHC energy. Significant B-meson signals have also been observed at low very 𝑝ₜ and high event multiplicity in 𝑝𝑝 collisions, which will allow us to study beauty quark …
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HADRONIZATION VIA QUARK COALESCENCE OF THE QUARK GLUON PLASMA AT ULTRARELATIVISTIC HEAVY-ION COLLISIONS
… of strongly interacting particles and has quarks and gluons as elementary constituents, they represent the fundamental degrees of freedom of the theory carrying the "color" charge. The QCD have two peculiar features: colour confinement and asymptotic freedom. The asymptotic freedom allow us …
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Tracking the quark-gluon plasma
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Monte Carlo simulation of the nuclear to quark matter deconfinement transition of three quark nucleons
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1986.
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Perturbative calculations and the top quark
Submitted by Elizabeth Kent (eckent2@illinois.edu) on 2012-05-17T17:34:22Z No. of bitstreams: 1 1998_Smith.pdf: 1562557 bytes, checksum: 155cebb27389d86711a7d7d56bea2899 (MD5)
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The mass of the strange quark
… sum rules are used to determine the strange-quark mass. We use improved QCD input and experimental data to obtain for the invariant mass: mₛ= 266 ± 29 MeV, or for the running mass at 1 GeV: mₛ(1 GeV) = 194 ± 4 MeV.
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A quark model for nuclear matter
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1985.
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Aspects of Nonperturbative Heavy Quark Physics
The properties of charm and bottom quarks are an interesting corner of Quantum Chromo-Dynamics (QCD) due to the fact that their masses are much heavier than the typical QCD interaction energy ΛQCD. Due to this scale separation, it is possible to describe these heavy quarks by Effective Field …
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Quark masses : an environmental impact statement
… be possible constrains the values of the quark masses. Specifically, we choose a slice through the parameter space of the Standard Model in which quark masses vary so that as many as three quarks play a role in the formation of nuclei, while keeping fixed the average mass of the two …
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Studies of lepton and quark interactions
… + Linear potential works not only for c and b quarks, but s quark as well. The leptonic decay constants of various (Qq̅) mesons together with their masses are predicted. The topponium states are also discussed.
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Search for supersymmetric partners of the top quark with the CMS detector and novel top quark tagging algorithms.
… for evidence that the superpartner of the top quark was produced then decayed into an undetected particle and a top quark that decayed to hadronic jets. No statistically significant deviation from standard model expectations is observed. Limits are placed on the production cross section in the …
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Theoretical models of many-quark bound states
… the properties of many-fermion bound states. The quark implementation of MFD (MFDq) was extensively tested on the 2-body problem against the established nucleon implementation of MFD (MFDn). We were able to perform a limited set of self-consistency checks of MFDq in the 4-body problem to test a …
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Effective field theory for top quark physics
The top quark plays an important role in the search for physics beyond the standard model because of its large mass. In the situation where new physics exist at an energy scale higher than the scale we can probe directly, it is desirable to have a model-independent approach, which we can use to …
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Strangeness production in a quark-gluon plasma
… two possible explanations. One is that strange quarks, being relatively light, are easily produced, creating an abundance of strange particles in the experiment. On the other hand, hadron gas models use only thermodynamics, strangeness neutrality and baryon number conservation to predict the …
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Massive quark self-energy in cavity QCD
… divergent. So far the self-energy of a massive quark in cavity quantum chromodynamics has only been calculated for the lowest cavity mode ls1/2. The methods used so far, have been based on the multiple reflection formalism, in which the zero reflection term is extracted out analytically and …
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The crystallography of three flavor quark matter
The nature of cold three-flavor quark matter at the large (but not asymptotic) densities relevant to neutron star phenomenology is not resolved. The gapless CFL phase, which was previously believed to have the lowest free energy, was recently shown to be unstable in the sense that some phase must …
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Testing the Standard Model With Top Quark Production
… the possibilities for studying single-top-quark production at the Tevatron and LHC. We find that there may be evidence for single-top-quark production in Run I data. Run II at the Tevatron should allow the W-gluon fusion cross section to be measured to $\pm$22% with 2 fb$\sp{-1}$ of data. …
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Multiple quark scattering analysis of proton-proton scattering
… in a model in which the protons are composed of quarks and the scattering is due to multiple collisions of the quarkso By including spin in the calculation it was hoped that the differential cross section data could be described without resorting to quark amplitudes with t-dependent phas.es to …
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Testing the Standard Model with Top-Quark Production
Now that the existence of the top quark is firmly established, attention turns to measuring its properties. Because of its large mass, the top quark may be sensitive to physics beyond the standard model. A promising candidate for this new physics is supersymmetry. Hence, we calculate the …
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