Search for Quadrupole Strength in the Electro-excitation of the Delta(1232)

C. Mertz , C. Vellidis , R. Alarcon , D.H. Barkhuff , A.M. Bernstein , W. Bertozzi , V. Burkert , J. Chen

show 35 more authors

J.R. Comfort G. Dodson S. Dolfini K. Dow M. Farkhondeh J.M. Finn S. Gilad R.W. Gothe X. Jiang K. Joo N.I. Kaloskamis A. Karabarbounis J.J. Kelly S. Kowalski C. Kunz R.W. Lourie J.I. McIntyre B.D. Milbrath R. Miskimen J.H. Mitchell C.N. Papanicolas C.F. Perdrisat A.J. Sarty J. Shaw S.-B. Soong D. Tieger C. Tschalaer W. Turchinetz P.E. Ulmer S. Van Verst G.A. Warren L.B. Weinstein S. Williamson R.J. Woo A. Young

Authors on Pith no claims yet

classification ⚛️ nucl-ex

keywords deltamodelquadrupolestataccountallowamplitudeamplitudes

0 comments

read the original 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.

This paper has not been read by Pith yet.

Search for Quadrupole Strength in the Electro-excitation of the Delta(1232)

discussion (0)