Phys. Rev. Lett. 76, 4488 - 4491 (1996)Spin Decomposition of the Δ Resonance Cross Section Using the 12C(p→,n→) Reaction at Ep = 795 MeV |
D. L. Prout1, S. DeLucia1, D. Cooper1, B. Luther1, E. Sugarbaker1, T. N. Taddeucci2, L. J. Rybarcyk2, J. Rapaport3, B. K. Park4, C. D. Goodman5, G. Edwards6, C. Glashausser6, T. Sams7, T. Udagawa8, and F. Osterfeld9
1The Ohio State University, Columbus, Ohio 43210
2Los Alamos National Laboratory, Los Alamos, New Mexico 87545
3Ohio University, Athens, Ohio 45701
4New Mexico State University, Las Cruces, New Mexico 88003
5Indiana University Cyclotron Facility, Bloomington, Indiana 47405
6Rutgers University, Piscataway, New Jersey 08855
7Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark
8University of Texas, Austin, Texas 78712
9Institut für Kernphysik, Kenforschungsanlage Jülich GmbH, 52425 Jülich, Germany
Received 18 January 1996
The first (p,n) polarization-transfer measurements for delta production on a nuclear target are presented for the 12C(p→,n→) reaction at 0° and 795 MeV. Polarization observables are used to extract the spin-longitudinal, spin-transverse, and spin-independent partial cross sections. In the spin-longitudinal channel, fair agreement is found between experiment and a model which includes a strongly attractive residual interaction. A large unexpected enhancement in the spin-transverse cross section is observed.
©1996 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v76/p4488
DOI: 10.1103/PhysRevLett.76.4488
PACS: 25.40.Hs, 14.20.Gk, 24.70.+s
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