| Numéro |
J. Phys. Colloques
Volume 46, Numéro C2, Février 1985
6th International Symposium on High Energy Spin Physics
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|
|---|---|---|
| Page(s) | C2-115 - C2-120 | |
| DOI | https://doi.org/10.1051/jphyscol:1985211 | |
6th International Symposium on High Energy Spin Physics
J. Phys. Colloques 46 (1985) C2-115-C2-120
DOI: 10.1051/jphyscol:1985211
1 Brookhaven National Laboratory, Upton, New York 11973, U.S.A.
2 University of Minnesota, Minneapolis, Minnesota 55455, U.S.A
3 Southeastern Massachusetts University, North Dartmouth, Massachusetts 02747, U.S.A.
J. Phys. Colloques 46 (1985) C2-115-C2-120
DOI: 10.1051/jphyscol:1985211
HARD QUARK-QUARK SCATTERING WITH EXCLUSIVE REACTIONS*
D.S. Barton1, G.M. Bunce1, A.S. Carroll1, Y.I. Makdisi1, B. Baller2, G.C. Blazey2, H. Courant2, K.J. Heller2, S. Heppelmann2, M.L. Marshak2, E.A. Peterson2, M.A. Shupe2, D.S. Wahl2, S. Gushue3 et J.J. Russell31 Brookhaven National Laboratory, Upton, New York 11973, U.S.A.
2 University of Minnesota, Minneapolis, Minnesota 55455, U.S.A
3 Southeastern Massachusetts University, North Dartmouth, Massachusetts 02747, U.S.A.
Résumé
Nous présentons les résultats pour les réactions π-p → π-p et π-p → [MATH]-p à θc.m. = 90° ou -t = 9 GeV2/c2. On observe un important signal ρ-p et le ρ- est fortement polarisé. Cette polarisation teste la prédiction de QCD selon laquelle les quarks ne peuvent pas renverser l'hélicité. Ce test est extrêmement mauvais.
Abstract
We present data from π-p → elastic and ρ-p final states for scattering at 90° center of mass, -t = 9 GeV2/c2. A large ρ-p signal is seen and the ρ- are strongly polarized. This polarization tests a QCD prediction that quarks cannot flip helicity. The test fails dramatically.