Parity-Violating Interactions and Dark Currents in the Deuteron
We investigate parity-violating asymmetries in np radiative capture at thermal neutron energies and in deuteron electro-disintegration in quasi-elastic kinematics, using the DDH model for the parity-violating nucleon-nucleon interaction. We find dramatic cancellations between the asymmetries induced by the parity-violating interactions and those arising from the associated parity-violating pion-exchange currents. In the np capture, the model-dependence of the result is nevertheless quite small, because of constraints arising through the Siegert evaluation of the relevant E{sub 1} matrix elements. In quasi-elastic electron scattering these processes are found to be insignificant compared to the asymmetry produced by gamma-Z interference on individual nucleons. These two experiments, then, provide clean probes of different aspects of weak-interaction physics associated with parity violation in the np system.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 809872
- Report Number(s):
- JLAB-THY-02-64; DOE/ER/40150-2414; TRN: US0302638
- Resource Relation:
- Other Information: No journal information given for this postprint; PBD: 1 Dec 2002
- Country of Publication:
- United States
- Language:
- English
Similar Records
Parity-violating interaction effects in the np system
Parity-Violating Effects in Two-Nucleon Systems