FIZIKA B 13 (2004)  1, 179-184

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HELICITY-DEPENDENT ANGULAR DISTRIBUTIONS IN DOUBLE-CHARGED-PION PHOTOPRODUCTION

S. STRAUCH
for the CLAS Collaboration

The George Washington University, Washington, D.C. 20052, USA

Received 28 August 2003;     Accepted 26 April 2004
Online 10 October 2004

Two-pion photoproduction in the reaction gp pp+p- has been studied at Jefferson Lab Hall B using a circularly polarized tagged-photon beam in the energy range between 0.6 GeV and 2.3 GeV. Owing to the large angular acceptance of the CLAS detector, complete beam-helicity-dependent angular distributions of the final-state particles were measured. The large cross-section asymmetries exhibit strong sensitivity to the kinematics of the reaction and provide valuable information on the reaction dynamics. Preliminary results are presented.

PACS numbers: 13.60.-4, 13.60.Le, 13.88.+e
UDC 539.12

Keywords: double-charged pion photoproduction, circularly polarized photons

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