Neutral Pion Electroproduction In The Resonance Region
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Neutral Pion Electroproduction In The Resonance Region
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Author :
language : en
Publisher:
Release Date : 2007
Neutral Pion Electroproduction In The Resonance Region written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
The electroproduction of baryon resonances at high Q2 is examined. Analysis focuses on the ?(1232) resonance via exclusive pseudoscalar meson production of ?0 particles. Differential cross sections are extracted for exclusive ?0 electroproduction. In the central invariant mass (W) region the cross sections are used to extract resonant multipole amplitudes. In particular, the ratio of the electric quadrupole to magnetic dipole amplitudes (E2/M1) will be discussed for the ?(1232) resonance. The transition to pQCD is discussed in terms of E2/M1 and other multipoles. The helicity amplitude A3/2 can be used as a baryon helicity conservation meter in this context and will be discussed. The fast shrinking of the resonant contribution in the ? region is observed at this high momentum transfer. Apart from the observables related to pQCD scaling, the transition form factor G$*\atop{M}$ is extracted along with the scalar to magnetic dipole ratio C2/M1.
Neutral Pion Electroproduction In The Resonance Region At High Q 2
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Author :
language : en
Publisher:
Release Date : 2009
Neutral Pion Electroproduction In The Resonance Region At High Q 2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
The process $ep \to e^{\prime}p^{\prime}\pi^0$ has been measured at $Q^2$ = 6.4 and 7.7 \ufourmomts in Jefferson Lab's Hall C. Unpolarized differential cross sections are reported in the virtual photon-proton center of mass frame considering the process $\gamma^{\ast}p \to p^{\prime}\pi^0$. Various details relating to the background subtractions, radiative corrections and systematic errors are discussed. The usefulness of the data with regard to the measurement of the electromagnetic properties of the well known $\Delta(1232)$ resonance is covered in detail. Specifically considered are the electromagnetic and scalar-magnetic ratios $R_{EM}$ and $R_{SM}$ along with the magnetic transition form factor $G_M^{\ast}$. It is found that the rapid fall off of the $\Delta(1232)$ contribution continues into this region of momentum transfer and that other resonances.
Neutral Pion Electroproduction In The Delta Resonance Region
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Author : Anthony Nicholas Villano
language : en
Publisher: ProQuest
Release Date : 2007
Neutral Pion Electroproduction In The Delta Resonance Region written by Anthony Nicholas Villano and has been published by ProQuest this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Physics categories.
Neutral Pion Electroproduction In The Delta Resonance Region
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Author :
language : en
Publisher:
Release Date : 2007
Neutral Pion Electroproduction In The Delta Resonance Region written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
The electroproduction of baryon resonances at high Q2 is examined. Analysis focuses on the Delta(1232) resonance via exclusive pseudoscalar meson production of À0 particles. Differential cross sections are extracted for exclusive À0 electroproduction. In the central invariant mass (W) region the cross sections are used to extract resonant multipole amplitudes. In particular, the ratio of the electric quadrupole to magnetic dipole amplitudes (E2/M1) will be discussed for the Delta(1232) resonance. The transition to pQCD is discussed in terms of E2/M1 and other multipoles. The helicity amplitude A3/2 can be used as a baryon helicity conservation meter in this context and will be discussed. The fast shrinking of the resonant contribution in the Delta region is observed at this high momentum transfer. Apart from the observables related to pQCD scaling, the transition form factor GM is extracted along with the scalar to magnetic dipole ratio C2/M1.
Electroproduction Of Neutral Pions In The Resonance Region
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Author :
language : en
Publisher:
Release Date : 1975
Electroproduction Of Neutral Pions In The Resonance Region written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.
Virtual Compton Scattering And Neutral Pion Electroproduction In The Resonance Region Up To The Deep Inelastic Region At Backward Angles
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Author :
language : en
Publisher:
Release Date : 2009
Virtual Compton Scattering And Neutral Pion Electroproduction In The Resonance Region Up To The Deep Inelastic Region At Backward Angles written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
We have made the first measurements of the virtual Compton scattering (VCS) process via the H(e, e'p)? exclusive reaction in the nucleon resonance region, at backward angles. Results are presented for the W-dependence at fixed Q2=1 GeV2, and for the Q2-dependence at fixed W near 1.5 GeV. The VCS data show resonant structures in the first and second resonance regions. The observed Q2-dependence is smooth. The measured ratio of H(e, e'p)? to H(e, e'p)?0 cross sections emphasizes the different sensitivity of these two reactions to the various nucleon resonances. Finally, when compared to Real Compton Scattering (RCS) at high energy and large angles, our VCS data at the highest W (1.8-1.9 GeV) show a striking Q2-independence, which may suggest a transition to a perturbative scattering mechanism at the quark level.
Electroproduction Of Neutral Pions At Energies Above The Resonance Region
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Author :
language : en
Publisher:
Release Date : 1975
Electroproduction Of Neutral Pions At Energies Above The Resonance Region written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.
Virtual Compton Scattering And Neutral Pion Electro Production From The Proton In The Nucleon Resonance Region
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Author : Luminita Todor
language : en
Publisher:
Release Date : 2003
Virtual Compton Scattering And Neutral Pion Electro Production From The Proton In The Nucleon Resonance Region written by Luminita Todor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The experiment (E93-050) at Jefferson Lab measured the ep {yields} ep{gamma} and ep {yields} ep{pi}{sup 0} cross sections in the nucleon resonance region, from the threshold to W = 1.9 GeV at Q{sup 2} = 1 GeV{sup 2} for backward emission of the {gamma} or {pi}{sup 0}.
Virtual Compton Scattering And Neutral Pion Electro Production From The Proton In The Nucleon Resonance Region
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Author :
language : en
Publisher:
Release Date : 2004
Virtual Compton Scattering And Neutral Pion Electro Production From The Proton In The Nucleon Resonance Region written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The experiment (E93-050) at Jefferson Lab measured the ep [yields] ep[gamma] and ep [yields] ep[pi][sup 0] cross sections in the nucleon resonance region, from the threshold to W = 1.9 GeV at Q[sup 2] = 1 GeV[sup 2] for backward emission of the [gamma] or [pi][sup 0].
Electroproduction Of Neutral Pions In The Region Of The First Nucleon Resonance
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Author : R. Siddle
language : en
Publisher:
Release Date : 1971
Electroproduction Of Neutral Pions In The Region Of The First Nucleon Resonance written by R. Siddle and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with categories.