Angle and energy dependence of the superratio for. pi. sup + and. pi. sup minus elastic scattering from sup 3 H and sup 3 He: Evidence for charge-symmetry violation

Journal Article · Sun Mar 31 23:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.43.1838· OSTI ID:5654352

Pillai, C; Barlow, D B; Berman, B L; Briscoe, W J; Mokhtari, A; Nefkens, B M.K.; Sadler, M E ^[1]

---

1. Department of Physics, University of California, Los Angeles, California 90024 (USA) Department of Physics, The George Washington University, Washington, D.C. 20052 (USA) Department of Physics, Abilene Christian University, Abilene, Texas 79699 (USA)

Data are presented on the energy and angle dependence of the charge-symmetry superratio {ital R} and simple ratios {ital r}{sub 1}{sup {prime}} and {ital r}{sub 2}{sup {prime}} for {pi}{sup {plus minus}} elastic scattering from {sup 3}H and {sup 3}He. {ital r}{sub 1}{sup {prime}} and {ital r}{sub 2}{sup {prime}} were normalized with respect to {pi}{sup +}{ital d} and {pi}{sup {minus}}{ital d} elastic scattering, which is assumed to have the ratio 1.0. The beam energies are {ital T}{sub {pi}}=142, 180, and 220 MeV, and the scattering angle, {theta}{sub {ital L}}, ranges from 40{degree} to 110{degree}. In all cases measured it is found that {ital R}{gt}1, {ital r}{sub 1}{sup {prime}}{congruent}1, and {ital r}{sub 2}{sup {prime}}{gt}1. These results provide substantial evidence for charge-symmetry violation. The angular distributions for {pi}{sup {plus minus}} H and {pi}{sup {plus minus}} {sup 3}He elastic scattering also have been measured and comparisons are made with various model calculations.

• DOE Contract Number: AS03-81ER40021; AS05-81ER40036; FG05-86ER40285
• OSTI ID: 5654352
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 43:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651220* -- Nuclear Properties & Reactions
A=1-5
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
ELASTIC SCATTERING
HADRON REACTIONS
HELIUM 3 TARGET
MESON REACTIONS
NUCLEAR REACTIONS
PION REACTIONS
SCATTERING
SYMMETRY BREAKING
TARGETS
TRITIUM TARGET