Q2 dependence of quadrupole strength in the γ*p → Δ+(1232) → pπ0 transition Article

Joo, K, Smith, LC, Burkert, VD et al. (2002). Q2 dependence of quadrupole strength in the γ*p → Δ+(1232) → pπ0 transition . PHYSICAL REVIEW LETTERS, 88(12), 1220011-1220015.

cited authors

  • Joo, K; Smith, LC; Burkert, VD; Minehart, R; Aznauryan, IG; Elouadrhiri, L; Stepanyan, S; Adams, GS; Amaryan, MJ; Anciant, E; Anghinolfi, M; Armstrong, DS; Asavapibhop, B; Audit, G; Auger, T; Avakian, H; Barrow, S; Bagdasaryan, H; Battaglieri, M; Beard, K; Bektasoglu, M; Bertozzi, W; Bianchi, N; Biselli, AS; Boiarinov, S; Bonner, BE; Brooks, WK; Calarco, JR; Capitani, GP; Carman, DS; Carnahan, B; Cole, PL; Coleman, A; Cords, D; Corvisiero, P; Crabb, D; Crannell, H; Cummings, J; de Sanctis, E; de Vita, R; Degtyarenko, PV; Demirchyan, RA; Denizli, H; Dennis, LC; Deppman, A; Dharmawardane, KV; Dhuga, KS; Djalali, C; Dodge, GE; Doughty, D; Dragovitsch, P; Dugger, M; Dytman, S; Eckhause, M; Efremenko, YV; Egiyan, H; Egiyan, KS; Farhi, L; Feuerbach, RJ; Ficenec, J; Fissum, K; Forest, TA; Funsten, H; Gai, M; Gavrilov, VB; Gilad, S; Gilfoyle, GP; Giovanetti, KL; Girard, P; Griffioen, KA; Guidal, M; Guillo, M; Gyurjyan, V; Hancock, D; Hardie, J; Heddle, D; Heisenberg, J; Hersman, FW; Hicks, K; Hicks, RS; Holtrop, M; Hyde-Wright, CE; Ito, MM; Jenkins, D; Kelley, JH; Khandaker, M; Kim, KY; Kim, W; Klein, A; Klein, FJ; Klusman, M; Kossov, M; Kuang, Y; Kuhn, SE; Laget, JM; Lawrence, D; Longhi, A; Loukachine, K; Lucas, M; Major, RW

authors

abstract

  • The dependence of quadrupole strength in the γ*p → δ+ (1232) → pπ0 transition was discussed. Experimental values for the ratios E1+/M1+ and S1+/M1+ over the range Q2 = 0.4-1.8 GeV2, were extracted from precision p(e, e'p)π0 data using a truncated multipole expansion. It was found that the typical (worst) absolute truncation error (including model dependence) was 0.3(0.7)% for REM and 0.1(0.5)% for RSM over the Q2 range of this experiment, with the error generally increasing with Q2 due to the larger relative importance of neglected nonresonant multipoles.

publication date

  • March 25, 2002

published in

start page

  • 1220011

end page

  • 1220015

volume

  • 88

issue

  • 12