Parity violating weak neutral current effects in elastic e- sup 12 C scattering
Recently we completed a measurement of the Poutry nonconservation (PNC) asymmetry in elastic e{sup {minus}12}scattering at the Bates Electron Accelerator Center in which we achieved a precision at the level of approximately 10{sup {minus}7}, and improvement of a factor of five beyond that of the best previous experimental result. Moreover, the asymmetry we determined, A {equivalent to} ({sigma}{sub R} {minus} {sigma}{sub L})/({sigma}{sub R} + {sigma}{sub L}), where{equivalent to}{sub R}and{equivalent to}{sub L}represent the differential cross sections for the scattering of electrons with right and left helicity respectively, unlike the quantities determined in many other PNC experiments, suffers no anmbiguity in the theoretical interpretation of its meaning, a result which follows from the spinless, isoscalar nature of the {sup {minus}12}C nucleus. These properties permit the relevant nuclear physics in the elastic e{sub {minus}12}C interaction to be described by a single form factor, which cancels precisely in the asymmetry given. This paper discusses this work.
- Research Organization:
- City Coll., New York, NY (USA). Dept. of Physics
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- FG02-86ER40304
- OSTI ID:
- 6964838
- Report Number(s):
- DOE/ER/40304-6; ON: DE90011185
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALGEBRAIC CURRENTS
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
CURRENTS
DOCUMENT TYPES
ELASTIC SCATTERING
ELECTRON REACTIONS
FORM FACTORS
INVARIANCE PRINCIPLES
LEPTON REACTIONS
NEUTRAL CURRENTS
NUCLEAR REACTIONS
P INVARIANCE
PARTICLE PROPERTIES
PROGRESS REPORT
SCATTERING
TARGETS
WEAK NEUTRAL CURRENTS
WEINBERG ANGLE