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Showing 1 to 13 of 13 for “"Parton Model"”.
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Finite-temperature quantum field theory and the structure functions of the nucleon
… of leptons off a proton in the statistical model is considered. The interior of the nucleon is viewed as 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 …
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Calculating the Q-Square(perpendicular)-Dependence in Drell-Yan Processes
… sets the scale of the quark distributions in parton model applications. We show that there are two sources of scale-breaking, one controlled by the mass of the photon, one by the kinematics of the particular process. Our final results indicate the presence of a contribution due to the …
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Inclusive and Exclusive Compton Processes in Quantum Chromodynamics
… analyze the process in the framework of the QCD parton model, in which the usual parton distributions emerge as a tool to describe the nucleon in terms of quark and gluonic degrees of freedom. To study its exclusive version, a new class of phenomenological functions is required, namely, …
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Hadron production in high energy muon scattering
… is discussed within the framework of the quark-parton model.
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A Precision Measurement of the Neutron d2: Probing the Color Force
… contains information beyond the simple parton model description of the nucleon. It provides insight into quark-gluon correlations and a path to access the confining local color force a struck quark experiences just as it is hit by the virtual photon due to the remnant di-quark. The …
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Deeply Virtual Compton Scattering off unpolarised deuterium at HERMES
… high precision measurements of ∆Σ in the Quark Parton Model, the fraction of the spin carried by the current quarks. Following the link of another piece of the puzzle, the orbital angular momentum of quarks and gluons, to the Generalised Parton Distribution (GPD) theoretical framework, HERMES …
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On Extracting Hadron Multiplicities and Unpolarized Nucleon Structure Ratios From SIDIS Data at the HERMES Experiment
… to extract unpolarized information about the parton momentum distribution functions (PDFs) inside the nucleon via the flavor tagging technique within the quark-parton model. In particular, one can exploit certain factorization assumptions and fragmentation symmetries to extract the valence …
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Topics in the generalized vector dominance model
… two topics in the Generalized Vector Dominance Model. In the first topic we construct a model for dilepton production in hadron·hadron interactions based on the idea of generalized vectordominance. We argue that in the high-mass region the generalized vectordominance model and the Drell-Yan …
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J/ψ production and polarization with the inclusion of transverse momentum effects
… allow to discern among different hadronization models is extremely valuable. One remarkable example is given by the analysis of J/ψ polarization states. In particular, we consider the J/ψ yield in semi-inclusive deep-inelastic scattering (SIDIS) processes and its subsequent decay into a lepton …
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Calculating the q²-dependence in Drell-Yan processes
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T17:36:58Z No. of bitstreams: 1 1980_mckitterick.pdf: 2088916 bytes, checksum: a4c1c034aebd58895f8e9e301857c873 (MD5)
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Two particle distributions in jets
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T21:13:03Z No. of bitstreams: 1 1980_willen.pdf: 3939411 bytes, checksum: 1194b34dfce854bcbde571876c62b6a6 (MD5)
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QCD jet evolution at high and low scales
… for merging tree-level matrix elements and parton showers. In the second part the main project is documented comprising the definition, realization and verification of a new QCD colour-dipole cascade. Finally, a new cluster-hadronization model is introduced.