@article{3097333,
    title = "Recoil polarization for Delta excitation in pion electroproduction -
art. no. 102002",
    author = "Kelly, JJ and Roche, RE and Chai, Z and Jones, MK and Gayou, O and and Sarty, AJ and Frullani, S and Aniol, K and Beise, EJ and Benmokhtar, F and and Bertozzi, W and Boeglin, WU and Botto, T and Brash, EJ and Breuer, H and and Brown, E and Burtin, E and Calarco, JR and Cavata, C and Chang, CC and and Chant, NS and Chen, JP and Coman, M and Crovelli, D and De Leo, R and and Dieterich, S and Escoffier, S and Fissum, KG and Garde, V and and Garibaldi, F and Georgakopoulus, S and Gilad, S and Gilman, R and and Glashausser, C and Hansen, JO and Higinbotham, DW and Hotta, A and and Huber, GM and Ibrahim, H and Iodice, M and de Jager, CW and Jiang, X and and Klimenko, A and Kozlov, A and Kumbartzki, G and Kuss, M and Lagamba, L and and Laveissiere, G and LeRose, JJ and Lindgren, RA and Liyanage, N and and Lolos, GJ and Lourie, RW and Margaziotis, DJ and Marie, F and Markowitz, and P and McAleer, S and Meekins, D and Michaels, R and Milbrath, BD and and Mitchell, J and Nappa, J and Neyret, D and Perdrisat, CF and Potokar, M and and Punjabi, VA and Pussieux, T and Ransome, RD and Roos, PG and and Rvachev, M and Saha, A and Sirca, S and Suleiman, R and Strauch, S and and Templon, JA and Todor, L and Ulmer, PE and Urciuoli, GM and Weinstein, and LB and Wijesooriya, K and Wojtsekhowski, B and Zheng, X and Zhu, L and and Jefferson Lab E91011 Collaboration and Hall A Collaboration",
    journal = "Physical Review and Physical Review Letters Index",
    year = "2005",
    volume = "95",
    number = "10",
    publisher = "AMER PHYSICAL SOC",
    issn = "0094-0003",
    doi = "10.1103/PhysRevLett.95.102001",
    abstract = "We measured angular distributions of recoil-polarization response
functions for neutral pion electroproduction for W=1.23 GeV at Q(2)=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 l(pi)<= 1 truncation."
}