Recoil Polarization for Delta Excitation in Pion Electroproduction
Kelly, J J and Fissum, Kevin LU
(2005)
In Physical Review Letters
95.
- Abstract
- We measured angular distributions of recoil-polarization response functions for neutral pion electroproduction for W=1.23 GeV at Q2=1.0 (GeV/c)2, obtaining 14 separated response functions plus 2 Rosenbluth combinations; of these, 12 have been observed for the first time. Dynamical models do not describe quantities governed by imaginary parts of interference products well, indicating the need for adjusting magnitudes and phases for nonresonant amplitudes. We performed a nearly model-independent multipole analysis and obtained values for Re (S1+/M1+)=-(6.84±0.15)% and Re (E1+/M1+)=-(2.91±0.19)% that are distinctly different from those from the traditional Legendre analysis based upon M1+ dominance and 1 truncation.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/713734
- author
- Kelly, J J
and Fissum, Kevin
LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 95
- article number
- 102001
- publisher
- American Physical Society
- external identifiers
-
- wos:000231615700008
- scopus:27144504173
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.95.102001
- project
- Production of Mesons with Electromagnetic Beams
- Investigations of and with Polarized Electromagnetic Beams
- language
- English
- LU publication?
- yes
- id
- 81c08aa9-c6d6-4412-b756-55c2b405d8d5 (old id 713734)
- date added to LUP
- 2016-04-04 14:03:14
- date last changed
- 2022-04-08 18:52:44
@article{81c08aa9-c6d6-4412-b756-55c2b405d8d5,
abstract = {{We measured angular distributions of recoil-polarization response functions for neutral pion electroproduction for W=1.23 GeV at Q2=1.0 (GeV/c)2, obtaining 14 separated response functions plus 2 Rosenbluth combinations; of these, 12 have been observed for the first time. Dynamical models do not describe quantities governed by imaginary parts of interference products well, indicating the need for adjusting magnitudes and phases for nonresonant amplitudes. We performed a nearly model-independent multipole analysis and obtained values for Re (S1+/M1+)=-(6.84±0.15)% and Re (E1+/M1+)=-(2.91±0.19)% that are distinctly different from those from the traditional Legendre analysis based upon M1+ dominance and 1 truncation.}},
author = {{Kelly, J J and Fissum, Kevin}},
issn = {{1079-7114}},
language = {{eng}},
publisher = {{American Physical Society}},
series = {{Physical Review Letters}},
title = {{Recoil Polarization for Delta Excitation in Pion Electroproduction}},
url = {{http://dx.doi.org/10.1103/PhysRevLett.95.102001}},
doi = {{10.1103/PhysRevLett.95.102001}},
volume = {{95}},
year = {{2005}},
}