Measurements of the γ*p→Δ reaction at low Q2:: Probing the mesonic contribution

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • S Stave
  • N Sparveris
  • MO Distler
  • I Nakagawa
  • P Achenbach
  • C Ayerbe Gayoso
  • D Baumann
  • J Bernauer
  • AM Bernstein
  • R Boehm
  • D Bosnar
  • T Botto
  • A Christopoulou
  • D Dale
  • M Ding
  • L Doria
  • J Friedrich
  • A Karabarbounis
  • M Makek
  • H Merkel
  • U Mueller
  • R Neuhausen
  • L Nungesser
  • CN Papanicolas
  • A Piegsa
  • J Pochodzalla
  • M Potokar
  • M Seimetz
  • S Sirca
  • S Stiliaris
  • Th Walcher
  • M Weis
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000259368700062&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1103/PhysRevC.78.025209
eISSN
1089-490X
Externe Identifier
  • Clarivate Analytics Document Solution ID: 350QR
ISSN
0556-2813
Ausgabe der Veröffentlichung
2
Zeitschrift
PHYSICAL REVIEW C
Artikelnummer
ARTN 025209
Datum der Veröffentlichung
2008
Status
Published
Titel
Measurements of the γ*<i>p</i>→Δ reaction at low Q<SUP>2</SUP>:: Probing the mesonic contribution
Sub types
  • Article
Ausgabe der Zeitschrift
78

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Autoren
  • S Stave
  • N Sparveris
  • MO Distler
  • I Nakagawa
  • P Achenbach
  • C Ayerbe Gayoso
  • D Baumann
  • J Bernauer
  • AM Bernstein
  • R Böhm
  • D Bosnar
  • T Botto
  • A Christopoulou
  • D Dale
  • M Ding
  • L Doria
  • J Friedrich
  • A Karabarbounis
  • M Makek
  • H Merkel
  • U Müller
  • R Neuhausen
  • L Nungesser
  • CN Papanicolas
  • A Piegsa
  • J Pochodzalla
  • M Potokar
  • M Seimetz
  • S Širca
  • S Stiliaris
  • Th Walcher
  • M Weis
DOI
10.1103/physrevc.78.025209
eISSN
1089-490X
ISSN
0556-2813
Ausgabe der Veröffentlichung
2
Zeitschrift
Physical Review C
Sprache
en
Artikelnummer
025209
Online publication date
2008
Status
Published online
Herausgeber
American Physical Society (APS)
Herausgeber URL
http://dx.doi.org/10.1103/physrevc.78.025209
Datum der Datenerfassung
2017
Titel
Measurements of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>γ</mml:mi><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mi>Δ</mml:mi></mml:mrow></mml:math>reaction at low<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>Q</mml:mi><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>: Probing the mesonic contribution
Ausgabe der Zeitschrift
78

Datenquelle: Crossref

Abstract
The determination of non-spherical angular momentum amplitudes in nucleons at long ranges (low Q^{2}), was accomplished through the $p(\vec{e},e'p)\pi^0$ reaction in the Delta region at $Q^2=0.060$, 0.127, and 0.200 (GeV/c)^2 at the Mainz Microtron (MAMI) with an accuracy of 3%. The results for the dominant transition magnetic dipole amplitude and the quadrupole to dipole ratios have been obtained with an estimated model uncertainty which is approximately the same as the experimental uncertainty. Lattice and effective field theory predictions agree with our data within the relatively large estimated theoretical uncertainties. Phenomenological models are in good agreement with experiment when the resonant amplitudes are adjusted to the data. To check reaction model calculations additional data were taken for center of mass energies below resonance and for the $\sigma_{TL'}$ structure function. These results confirm the dominance, and general Q^2 variation, of the pionic contribution at large distances.
Autoren
  • S Stave
Autoren-URL
http://arxiv.org/abs/0803.2476v2
Zeitschrift
Phys.Rev.C
Schlüsselwörter
  • hep-ex
  • hep-ex
  • hep-ph
  • nucl-ex
  • nucl-th
Notes
22 pages, 16 figures. Accepted for publication in Phys. Rev. C Minor changes in figures and text based upon referee commentary
Paginierung
025209
Datum der Veröffentlichung
2008
Herausgeber URL
http://dx.doi.org/10.1103/PhysRevC.78.025209
Datum der Datenerfassung
2008
Datum, an dem der Datensatz öffentlich gemacht wurde
2008
Titel
Measurements of the gamma*p->Delta Reaction At Low Q^2: Probing the Mesonic Contribution
Ausgabe der Zeitschrift
78

Files

0803.2476v2.pdf

Datenquelle: arXiv

Beziehungen:
Eigentum von

Werkzeuge