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Showing 1 to 20 of 88 for “"gluons"”.
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Transport theory for scalar quarks and gluons
… equations for a theory of scalar quarks and gluons with self-interactions. Special care has been taken in particular in understanding how the transport equation, taken on its own, leads to a Boltzmann-like equation when considered in the quasiparticle approximation. Through the analysis of …
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ΕΞΑΓΩΓΗ ΣΥΝΑΡΤΗΣΕΩΝ ΔΟΜΗΣ GLUONS ΤΟΥ ΠΙΟΝΙΟΥ ΚΑΙ ΑΝΤΙΠΡΩΤΟΝΙΟΥ ΑΠΟ ΜΕΛΕΤΗ ΠΑΡΑΓΩΓΗΣ Ψ
A COMPARISON OF THE MEASURED BY ES37 OF FERMILAB XF DISTRIBUTION OF Ψ WITH THEPREDICTED BY Q.C.D. MODELS DEFINE THE GLUON STRUCTURE FUNCTION INTO THE HADRON. IN THE COMPARISON ALL THE SECONDARY EFFECTS WERE INCLUDED.
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The Runny Gauge Plasma: shear viscosity to entropy for quarks and gluons
Heavy ion experiments at the LHC and RHIC have supported the existence of a quark-gluon plasma (QGP), which is strongly coupled and behaves as an almost ideal fluid. We shall discuss both bulk thermodynamic and off-equilibrium transport properties of the QGP, within the theory of quantum …
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Particles Inside Particles: The Flow of Energy in Quarks, Gluons, and Jets
… QCD and the scattering of partons (quarks and gluons), discussing jets as theoretical and experimental proxies for partonic physics, and presenting the partonic cascade model of jet formation and jet substructure. Noting the ubiquitous presence of low-energy pollution in particle collision …
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Measuring the contribution of low Bjorken-x gluons to the proton spin with polarized proton-proton collisions
Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2013-11-12T14:41:03Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 wolin_scott.pdf: 29387679 bytes, checksum: f8dc36cd5021b9d3f03851d3d9ba5b7a (MD5)
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Finite-temperature quantum field theory and the structure functions of the nucleon
… a thermalized assembly of up and down quarks and gluons. This enables the incorporation of features which are absent in the parton model. These include the presence of identical quarks and gluons in initial and final states and of quantum statistical correlations which have a role to play in the …
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Towards the quark gluon plasma via MHV techniques
… one, two and three soft and collinear radiative gluons from a hard struck quark. Our MHV results exhibit non-Abelian information about the correlation of gluons. As a phenomenological analysis, we study the energy spectrum for emitting radiative gluons using our MHV results. By comparing the MHV …
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Exploring Hadron Structure Through Monte-Carlo Fits and Model Calculations
… of even smaller particles known as quarks and gluons, there has been a concerted effort to understand the proton's internal structure. There still remain many mysteries about the proton and the theory that describes the interactions within: Quantum Chromodynamics (QCD). The distributions of …
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The structure of hadrons and other potential phases of QCD
… describing subatomic particles called quarks and gluons, and the strong force that binds them together into protons and neutrons. This thesis centers on two major thrusts of modern QCD research: (1) uncovering the inner quark and gluon structure of the proton, and (2) mapping out other phases of …
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A measurement of the contribution of the gluon to the spin of the nucleon
… contribution to the spin of the nucleon from the gluons mediating the strong force within the nucleon. The experimental data was obtained using the HERMES instrument at the Deustches Elektronen-Synchroton (DESY) in Hamburg, Germany during the year 2000. The effort was motivated by an earlier …
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Determination of the gluon polarisation in the nucleon using hadron pairs with high transverse momentum at COMPASS
… has been measured, the contributions from gluons and orbital angular momentum are not constrained. <br> <br>This thesis is dedicated to the determination of the gluon polarisation in the nucleon. The analysis is based on the data taken by the COMPASS experiment at CERN during the years 2002 …
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Hadronic productions of a Higgs boson in association with two jets at next-to-leading order
… effective theory in which the Higgs couples to gluons in the limit of a large top quark mass. We treat the Higgs as the real part of the complex field φ that couples to the self-dual field strengths. We use modern on-shell inspired methods to calculate helicity amplitudes and we give a detailed …
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Probing the Frontiers of the Standard Model with Lattice QCD
… Standard Model interactions of the quarks and gluons that compose them, made difficult by the fact that quantum chromodynamics is non-perturbative at low energies. In the face of the breakdown of perturbation theory, lattice QCD – a discretization of the Feynman path integral on a …
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Gluon polarization in the proton: constraints at low x from the measurement of the double longitudinal spin asymmetry for forward-rapidity hadrons with the PHENIX detector at RHIC
… of how to account for the remaining spin. As gluons carry roughly 50\% of the proton's momentum, it seemed most logical to look to the gluon spin as another significant contributor. However, lepton-nucleon scattering experiments only access the gluon helicity distribution, $\Delta g$, through …
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Charged hadron transverse momentum spectra in Au+Au and d+Au collisions at 200 GeV per nucleon pair
… at very high energy densities the quarks and gluons within hadrons will become deconfined and form a Quark-Gluon Plasma (QGP). These densities are thought to be achievable with Au+Au collisions at RHIC energies. Another prediction theorizes that before the collision, the very high energies of …
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Maxima in strangeness observed in heavy ion collisions using statistical models
… to a state of deconfined fundamental quarks and gluons known as quark gluon plasma (QGP).
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MEASUREMENTS OF TRANSVERSE SPIN DEPENDENT DI-PION AZIMUTHAL CORRELATION ASYMMETRY AND UNPOLARIZED DI-PION CROSS-SECTION IN PROTON-PROTON COLLISIONS AT A CENTER-OF-MASS ENERGY OF 200 GeV AT STAR
… FFs, $D_1^{h_1h_2/q(g)}$ for quarks, \emph{q} (gluons, \emph{g}). Extraction of these FFs requires measurements of the unpolarized dihadron cross-section in $pp$ collisions, which are urgently needed. In $pp$ collisions, the unpolarized cross-section measurement provides access to the …
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Exotic States in Quarkonium Physics: Effective Theories of Heavy Mesonic Molecules and an AdS/QCD Model of Hybrid Quarkonium
… chromodynamics (QCD), the theory of quarks and gluons, is known to be</p><p>the correct description of strong nuclear interactions. At high energy and momenta,</p><p>one can use QCD directly to compute quantities of physical interest related to the</p><p>strong force. At low energies and …
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Perturbative and non perturbative effects in the Standard Model and orbifolded ADS/CFT based theories
… of the Green functions associated to reggeized gluons. Here the eigenvalues of the BKP kernel for states of more than three reggeized gluons are unknown in general, contrary to the large Nc limit (planar limit) case where the problem becomes integrable. In this contest we consider a 4-gluon …
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