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Recoil polarization...
Recoil polarization measurements for neutral pion electroproduction at Q(2)=1(GeV/c)(2) near the Delta resonance
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Kelly, J. J. (author)
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Gayou, O. (author)
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Roche, R. E. (author)
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show more...
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Chai, Z. (author)
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Jones, M. K. (author)
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Sarty, A. J. (author)
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Frullani, S. (author)
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Aniol, K. (author)
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Beise, E. J. (author)
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Benmokhtar, F. (author)
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Bertozzi, W. (author)
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Boeglin, W. U. (author)
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Botto, T. (author)
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Brash, E. J. (author)
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Breuer, H. (author)
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Brown, E. (author)
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Burtin, E. (author)
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Calarco, J. R. (author)
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Cavata, C. (author)
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Chang, C. C. (author)
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Chant, N. S. (author)
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Chen, J. -P. (author)
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Coman, M. (author)
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Crovelli, D. (author)
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De Leo, R. (author)
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Dieterich, S. (author)
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Escoffier, S. (author)
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- Fissum, Kevin (author)
- Lund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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Garde, V. (author)
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Garibaldi, F. (author)
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Georgakopoulos, S. (author)
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Gilad, S. (author)
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Gilman, R. (author)
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Glashausser, C. (author)
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Hansen, J. -O. (author)
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Higinbotham, D. W. (author)
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Hotta, A. (author)
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Huber, G. M. (author)
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Ibrahim, H. (author)
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Iodice, M. (author)
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de Jager, C. W. (author)
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Jiang, X. (author)
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Klimenko, A. (author)
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Kozlov, A. (author)
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Kumbartzki, G. (author)
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Kuss, M. (author)
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Lagamba, L. (author)
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Laveissiere, G. (author)
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LeRose, J. J. (author)
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Lindgren, R. A. (author)
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Liyange, N. (author)
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Lolos, G. J. (author)
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Lourie, R. W. (author)
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Margaziotis, D. J. (author)
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Marie, F. (author)
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Markowitz, P. (author)
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McAleer, S. (author)
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Meekins, D. (author)
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Michaels, R. (author)
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Milbrath, B. D. (author)
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Mitchell, J. (author)
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Nappa, J. (author)
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Neyret, D. (author)
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Perdrisat, C. F. (author)
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Potokar, M. (author)
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Punjabi, V. A. (author)
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Pussieux, T. (author)
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Ransome, R. D. (author)
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Roos, P. G. (author)
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Rvachev, M. (author)
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Saha, A. (author)
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Sirca, S. (author)
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Suleiman, R. (author)
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Strauch, S. (author)
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Templon, J. A. (author)
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Todor, L. (author)
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Ulmer, P. E. (author)
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Urciuoli, G. M. (author)
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Weinstein, L. B. (author)
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Wijsooriya, K. (author)
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Wojtsekhowski, B. (author)
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Zheng, X. (author)
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Zhu, L. (author)
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(creator_code:org_t)
- 2007
- 2007
- English.
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In: Physical Review C (Nuclear Physics). - 0556-2813. ; 75:2
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- We measured angular distributions of differential cross section, beam analyzing power, and recoil polarization for neutral pion electroproduction at Q(2)=1.0 (GeV/c)(2) in 10 bins of 1.17 <= W <= 1.35 GeV across the Delta resonance. A total of 16 independent response functions were extracted, of which 12 were observed for the first time. Comparisons with recent model calculations show that response functions governed by real parts of interference products are determined relatively well near the physical mass, W=M-Delta approximate to 1.232 GeV, but the variation among models is large for response functions governed by imaginary parts, and for both types of response functions, the variation increases rapidly with W > M-Delta. We performed a multipole analysis that adjusts suitable subsets of center dot(pi)<= 2 amplitudes with higher partial waves constrained by baseline models. This analysis provides both real and imaginary parts. The fitted multipole amplitudes are nearly model independent-there is very little sensitivity to the choice of baseline model or truncation scheme. By contrast, truncation errors in the traditional Legendre analysis of N ->Delta quadrupole ratios are not negligible. Parabolic fits to the W dependence around M-Delta for the multiple analysis gives values for Re(S1+/M1+)=(-6.61 +/- 0.18)% and Re(E1+/M1+)=(-2.87 +/- 0.19)% for the p pi(0) channel at W=1.232 GeV and Q(2)=1.0 (GeV/c)(2) that are distinctly larger than those from the Legendre analysis of the same data. Similarly, the multipole analysis gives Re(S0+/M1+)=(+7.1 +/- 0.8)% at W=1.232 GeV, consistent with recent models, while the traditional Legendre analysis gives the opposite sign because its truncation errors are quite severe.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
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Kelly, J. J.
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Gayou, O.
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Roche, R. E.
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Chai, Z.
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Jones, M. K.
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Sarty, A. J.
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show more...
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Frullani, S.
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Aniol, K.
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Beise, E. J.
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Benmokhtar, F.
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Bertozzi, W.
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Boeglin, W. U.
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Botto, T.
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Brash, E. J.
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Breuer, H.
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Brown, E.
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Burtin, E.
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Calarco, J. R.
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Cavata, C.
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Chang, C. C.
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Chant, N. S.
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Chen, J. -P.
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Coman, M.
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Crovelli, D.
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De Leo, R.
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Dieterich, S.
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Escoffier, S.
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Fissum, Kevin
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Garde, V.
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Garibaldi, F.
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Georgakopoulos, ...
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Gilad, S.
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Gilman, R.
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Glashausser, C.
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Hansen, J. -O.
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Higinbotham, D. ...
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Hotta, A.
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Huber, G. M.
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Ibrahim, H.
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Iodice, M.
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de Jager, C. W.
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Jiang, X.
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Klimenko, A.
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Kozlov, A.
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Kumbartzki, G.
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Kuss, M.
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Lagamba, L.
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Laveissiere, G.
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LeRose, J. J.
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Lindgren, R. A.
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Liyange, N.
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Lolos, G. J.
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Lourie, R. W.
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Margaziotis, D. ...
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Marie, F.
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Markowitz, P.
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McAleer, S.
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Meekins, D.
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Michaels, R.
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Milbrath, B. D.
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Mitchell, J.
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Nappa, J.
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Neyret, D.
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Perdrisat, C. F.
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Potokar, M.
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Punjabi, V. A.
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Pussieux, T.
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Ransome, R. D.
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Roos, P. G.
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Rvachev, M.
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Saha, A.
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Sirca, S.
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Suleiman, R.
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Strauch, S.
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Templon, J. A.
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Todor, L.
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Ulmer, P. E.
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Urciuoli, G. M.
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Weinstein, L. B.
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Wijsooriya, K.
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Wojtsekhowski, B ...
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Zheng, X.
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Zhu, L.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
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Physical Review ...
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Lund University