Search for quadrupole strength in the electroexcitation of the Delta(+)(1232)
Publication Date
2001
Journal or Book Title
Physical Review Letters
Abstract
High-precision H(e,e'p)pi0 measurements at Q2=0.126 (GeV/c)2 are reported, which allow the determination of quadrupole amplitudes in the gamma* N->Delta transition; they simultaneously test the reliability of electroproduction models. The derived quadrupole-to-dipole amplitude ratios, Rsm=(-6.5 +- 0.2{stat+sys} +- 2.5{mod}) % and Rem=(-2.1 +- 0.2{stat+sys} +- 2.0{mod}) %, are dominated by model error. Previous Rsm and Rem results should be reconsidered after the model uncertainties associated with the method of their extraction are taken into account.
DOI
https://doi.org/10.1103/PhysRevLett.86.2963
Volume
86
Issue
14
Pages
2963-2966
Recommended Citation
Mertz, C; Vellidis, CE; Alarcon, R; Barkhuff, DH; Bernstein, AM; Bertozzi, W; Burkert, V; Chen, J; Comfort, JR; Dodson, G; Dolfini, S; Dow, K; Farkhondeh, M; Finn, JM; Gilad, S; Gothe, RW; Jiang, X; Joo, K; Kaloskamis, NI; Karabarbounis, A; Kelly, JJ; Kowalski, S; Kunz, C; Lourie, RW; McIntyre, JI; Milbrath, BD; Miskimen, R; Mitchell, JH; Papanicolas, CN; Perdrisat, CF; Sarty, AJ; Shaw, J; Soong, SB; Tieger, D; Tschalaer, C; Turchinetz, W; Ulmer, PE; Van Verst, S; Warren, GA; Weinstein, LB; Williamson, S; Woo, RJ; and Young, A, "Search for quadrupole strength in the electroexcitation of the Delta(+)(1232)" (2001). Physical Review Letters. 44.
https://doi.org/10.1103/PhysRevLett.86.2963