Author: Cornelis Pieter Louwerse
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
Book Description
Dispersion relation calculations for pion electroproduction and...
Author: Cornelis Pieter Louwerse
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
Book Description
Dispersion Relation Calculations for Pion Electroproduction and Compton Scattering
Author: Cornelis Pieter Louwerse
Publisher:
ISBN:
Category :
Languages : en
Pages : 145
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 145
Book Description
Low Momentum Transfer Measurements of Pion Electroproduction and Virtual Compton Scattering at the Delta Resonance
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 123
Book Description
Non-spherical components of the nucleon wave function are measured through p(e, e'p)[pi]0 experiment at the [Delta]+(1232) resonance for Q2 = 0.04, 0.09, and 0.13 (GeV=c)2 utilizing the Jefferson National Accelerator Facility (JLab) pulsed beam and Hall A spectrometers. The new data extend the measurements of the Coulomb quadrupole amplitude to the lowest momentum transfer ever reached. The results disagree with predictions of constituent quark models and are in reasonable agreement with dynamical calculations that include pion cloud effects, chiral effective field theory and lattice calculations. The reported measurements indicate that improvement is required to the theoretical calculations and provide valuable input that will allow their refinements. The Coulomb to magnetic multipole ratio (CMR) and generalized polarizability (GP) of the nucleon are also measured through virtual Compton scattering (VCS) for Q2 = 0.2(GeV=c)2 utilizing the Mainz Microtron (MAMI) continuous beam and A1 spectrometers. This data represents the first low Q2 GP measurement at the [Delta]+(1232) resonance. The GP measurement explores a region where previous data and theoretical calculations disagree. The CMR measurement will be the first VCS extraction to compare with world data generated through pion electroproduction. The Dispersion Relation (DR) model used for the VCS extraction provides a new theoretical framework for the data signal and backgrounds that is largely independent from the pion electroproduction models. The independence of the DR from the traditional models provides a strong crosscheck on the ability of the models to isolate the data signal.
Publisher:
ISBN:
Category :
Languages : en
Pages : 123
Book Description
Non-spherical components of the nucleon wave function are measured through p(e, e'p)[pi]0 experiment at the [Delta]+(1232) resonance for Q2 = 0.04, 0.09, and 0.13 (GeV=c)2 utilizing the Jefferson National Accelerator Facility (JLab) pulsed beam and Hall A spectrometers. The new data extend the measurements of the Coulomb quadrupole amplitude to the lowest momentum transfer ever reached. The results disagree with predictions of constituent quark models and are in reasonable agreement with dynamical calculations that include pion cloud effects, chiral effective field theory and lattice calculations. The reported measurements indicate that improvement is required to the theoretical calculations and provide valuable input that will allow their refinements. The Coulomb to magnetic multipole ratio (CMR) and generalized polarizability (GP) of the nucleon are also measured through virtual Compton scattering (VCS) for Q2 = 0.2(GeV=c)2 utilizing the Mainz Microtron (MAMI) continuous beam and A1 spectrometers. This data represents the first low Q2 GP measurement at the [Delta]+(1232) resonance. The GP measurement explores a region where previous data and theoretical calculations disagree. The CMR measurement will be the first VCS extraction to compare with world data generated through pion electroproduction. The Dispersion Relation (DR) model used for the VCS extraction provides a new theoretical framework for the data signal and backgrounds that is largely independent from the pion electroproduction models. The independence of the DR from the traditional models provides a strong crosscheck on the ability of the models to isolate the data signal.
Dispersion Relation Calculations for Pion Elektroproduction and Compton Scattering
Author: Cornelis Pieter Louwerse
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
High Energy Physics
Author: E Burhop
Publisher: Elsevier
ISBN: 0323157254
Category : Science
Languages : en
Pages : 295
Book Description
High Energy Physics, Volume V is a collection of papers that discusses photo- and electro-production processes, Reggae phenomenology, and quantum electrodynamics. The book explains the details involved in pion photo-production and electro-production, such as the kinematics, the choice of invariant amplitudes, the multipole amplitude, helicity amplitude expansions of the transition matrix, cross section, polarization formulas. The text also discusses high energy phenomenology using Regge poles, particularly on finite energy sum rules (FESR), duality, the Veneziano model, and Regge cuts. The Veneziano model, a form of amplitude combining low energy resonances and high energy Regge behavior in an analytic and crossing-symmetric ways, satisfies FESR. The model also provides a true realization of duality. The book analyzes evidence on the validity of quantum electrodynamics showing no grave discrepancies that are present between quantum electrodynamics and experiments. The text then describes the low energy tests and the high energy tests (including those with storage rings). The book can prove useful for theoretical physicists, investigators of quantum mechanics, and professors of advance physics.
Publisher: Elsevier
ISBN: 0323157254
Category : Science
Languages : en
Pages : 295
Book Description
High Energy Physics, Volume V is a collection of papers that discusses photo- and electro-production processes, Reggae phenomenology, and quantum electrodynamics. The book explains the details involved in pion photo-production and electro-production, such as the kinematics, the choice of invariant amplitudes, the multipole amplitude, helicity amplitude expansions of the transition matrix, cross section, polarization formulas. The text also discusses high energy phenomenology using Regge poles, particularly on finite energy sum rules (FESR), duality, the Veneziano model, and Regge cuts. The Veneziano model, a form of amplitude combining low energy resonances and high energy Regge behavior in an analytic and crossing-symmetric ways, satisfies FESR. The model also provides a true realization of duality. The book analyzes evidence on the validity of quantum electrodynamics showing no grave discrepancies that are present between quantum electrodynamics and experiments. The text then describes the low energy tests and the high energy tests (including those with storage rings). The book can prove useful for theoretical physicists, investigators of quantum mechanics, and professors of advance physics.
A Study of the Partial Wave Dispersion Relations for Pion-nucleon Scattering
Author: Leonard Micajah Simmons
Publisher:
ISBN:
Category : Mesons
Languages : en
Pages : 154
Book Description
Publisher:
ISBN:
Category : Mesons
Languages : en
Pages : 154
Book Description
A Proposal for Determining the Electromagnetic Form Factor of the Pion
Author: William Robert Frazer
Publisher:
ISBN:
Category : Form factor (Nuclear physics)
Languages : en
Pages : 70
Book Description
Publisher:
ISBN:
Category : Form factor (Nuclear physics)
Languages : en
Pages : 70
Book Description
Dispersion Relations
Author: G. R. Screaton
Publisher:
ISBN:
Category : Dispersion
Languages : en
Pages : 312
Book Description
Publisher:
ISBN:
Category : Dispersion
Languages : en
Pages : 312
Book Description