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Showing 1 to 20 of 26 for “"Vector Meson"”.
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Vector meson dominance and pion photoproduction
A detailed theoretical treatment is given of the vector mesondominance approximation of a k2 dispersion relation for any of a large number of sets of invariant amplitudes for pion photoproduction. The resulting cross section always has a kinematic singularity; whether or not it is in the physical …
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A Dual-Resonance Model of Inclusive Vector-Meson Production
Made available in DSpace on 2015-05-12T22:39:09Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7500409.PDF: 3386951 bytes, checksum: 8f3381d69399437b179e166157ccb859 (MD5) Previous issue date: 1974
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A Dual Resonance Model of Inclusive Vector Meson Production
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-11T20:02:45Z No. of bitstreams: 1 1974_randa.pdf: 3856188 bytes, checksum: fbeef8510c8ae0398452366e2c70e13c (MD5)
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Studies in deep inelastic scattering and vector meson photoproduction
The first part of this thesis is devoted to a space-time analysis of deep inelastic scattering fran protons at rest. Techniques are developed for identifying important space-time regions. These are then applied to obtain a space-time picture of deep inelastic scattering in the leading logarithmic …
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Electroproduction of the Phi(1020) Vector Meson at 4 GeV
… expected t-slope dependence on Q² and Δ𝜏 in 𝜙 vector meson production. We find that the width of the forward 𝜙-meson diffraction peak increases rapidly as the interaction time decreases below cΔ𝜏 ≈ 1 fm. Within a simple optical model framework, the data show that 𝜙 meson has a smaller size than …
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Light vector meson production at forward rapidity in pp collisions at the LHC with the ALICE detector
Low-mass vector mesons (ρ,ω and Φ) give us information on the hot and dense state of strongly interacting matter produced in heavy ion collisions. In fact, in the QGP an enhancement of the strange particle production should be present (strangeness enhancement), which means a Nø/Nρ+ω ratio …
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Field Theoretic Models of Deep Inelastic Lepton-Nucleon Scattering
… non-trivial functions of ω) in our neutral vector meson ladder model and our pseusoscalar meson model because of the appearance of factors of ln|q<sup>2</sup>|. We also find the neutrino-nucleon structure functions in analogous ladder models and they exhibit the same non-scaling behavior. In …
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Soliton interactions and bound states
… model containing a baby skyrmion coupled to a vector meson. This is an analogue of the (3 + 1)-dimensional Skyrme theory containing a vector meson. We use this lower-dimensional analogue to numerically justify the use of a rational map ansatz in the analysis of the (3 + 1)-dimensional skyrmion. …
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Exclusive J/Ψ Vector-Meson production in high-energy nuclear collisions: a cross-section determinaton in the Colour Glass Condensate effective field theory and a feasibility study using the STARlight Monte Carlo event generator
The cross-section calculation for exclusive J /Ψ vector-meson production in ultra-peripheral heavy ion collisions is approached in two ways. First, the setup for a theoretical calculation is done in the context of the Colour Glass Condensate effective field theory. Rapidity-averaged n-point …
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Application of the relativistic Schrödinger equation to the bootstrap problem
… Schrodinger equation is used to investigate the meson bootstrap problem. The forces are computed from the usual Feynman graphs for single particle exchanges. At first, pseudoscalar-pseudoscalarmeson scattering is considered in a multichannel calculation. The vector mesons obtained are recombined …
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Microscopic Calculations in Diffractive Deep Inelastic Scattering
… between diffraction into low-mass continuum and vector meson production, and calculate the diffractive contribution to the spin structure functions.
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Pion electromagnetic form factor in the Kroll-Lee-Zumino model at zero and finite temperature
… to the pion electromagnetic form factor in vector meson dominance. At zero temperature the predictions for both the form factor and electromagnetic radius are found to improve greatly over the tree level result, and are in good agreement with the experimental data. A calculation of the …
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Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory
… field theory of charged pions and a neutral ρ meson, provides a framework to compute corrections to the tree-level Vector-Meson-Dominance model. Despite a large ρππ coupling (gρππ ≈ 5), the loop suppresion factor of 1=(4π)² helps give reasonably small NLO (one-loop) corrections. When it comes …
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Two-loop corrections to the rho-propagator in the Kroll-Lee-Zumino theory
… field theory of charged pions and neutral rho-mesons. It provides the quantum field theory platform for the vector meson dominance model, allowing for a systematic computation of quantum corrections in perturbation theory (the ρ-π-π coupling is small enough for perturbation theory to make …
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Incoherent Photoproduction of $\phi$ Mesons in Ultra-Peripheral Pb+Pb Collisions at $\sqrt{s_{NN}}$ = 5.02 TeV
… interacts with the other nucleus, with a single vector meson the most common final state. The $\phi$ meson is a vector meson composed of a strange and a anti-strange quark, with $\phi\rightarrow K^+ K^-$ as the dominant decay mode. The photoproduction of $\phi$ mesons has been studied in …
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Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES
… invoking in-medium modifications of the $\rho$ meson. To distinguish between different theoretical explanations of the enhancement the experiment was upgraded in 1998 by the addition of a radial TPC to improve the mass resolution in the vector meson region. In this thesis, the analysis of the …
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Upgrades to the eSTARlight Monte Carlo Event Generator
… can produce a range of particles including vector mesons. The eSTARlight Monte Carlo event generator simulates these collisions and calculates the cross sections of vector meson production reactions. This thesis describes the upgrades I made to eSTARlight for better simulation of …
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Calculations on production reactions using the absorptive peripheral model
… is used in the calculations; only two body meson induced reactions are treated. A comparison between the partial wave summation method~ which is used here, and the earlier impact parameter formalism is given. The reaction K p -> K*N is treated in detail, as both pseudoscalar and vector meson …
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Regge pole and K-matrix models for two particle reactions
… cross sections and decay correlations for the vector meson are calculated for a comparison to experiment, The K+p reactions near 1 BeV/c are studied using the Kmatrix formalism. It is found that the general features of the experimental data, including the I = 1 peak in the total cross section …
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Electroproduction of Phi(1020) Mesons at High Q² with CLAS
… which is compatible within errors to the Vector Meson Dominance prediction of 1/Q⁴ as well as to the expected behavior of a quark and gluon exchange-dominated model described by Generalized Parton Distributions of 1/Q⁶. The differential cross section dσ/dφ was used to determine that the …
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