Parity nonconservation in zero-momentum transfer lepton-hadron interactions

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5794746

Smith, D D

An experiment is performed with a lepton-hadron bound state system which yields an upper limit on parity nonconservation in the electron-proton interaction. Electric dipole transition rates are measured between perturbed hyperfine states of metastable H(2S). The primary effect of a PNC electron-proton interaction is to mix S and P states. Since a transition electric dipole moment, E1/sub PNC/, induced by such an interaction is expected to be extremely small, an experiment has been designed to observe it in interference with a parity-conversing (PC) electric dipole amplitude, E1/sub PC/, induced by the Stark effect, in a transition region which breaks inversion symmetry. Microwave (f approx. 1600 MHz) electric dipole transitions are observed between the Zeeman hyperfine substrates /sup 1//sub 0/ and ..beta../sub 0/ of H(2S) in a dc electric field (E vector) and a dc magnetic field (B vector) set near the level crossings of the ..beta.. substates and the substates e of the strong damped 2P/sub 1/2/ state. The detected final state is ..beta../sub 0/ as it is the only state at this level crossing which is mixed with a nearby P state (epsilon/sub 0/) by the PNC interaction.

• Research Organization: Michigan Univ., Ann Arbor (USA)
• OSTI ID: 5794746
• Country of Publication: United States
• Language: English

Related Subjects

651213* -- Nuclear Properties & Reactions
A=1-5
Theoretical-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOUND STATE
DATA
E1-TRANSITIONS
ELECTRON-NUCLEON INTERACTIONS
ELECTRON-PROTON INTERACTIONS
ENERGY-LEVEL TRANSITIONS
EXPERIMENTAL DATA
HYPERFINE STRUCTURE
INFORMATION
INTERACTIONS
INVARIANCE PRINCIPLES
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MAGNETIC FIELDS
MULTIPOLE TRANSITIONS
NUMERICAL DATA
P INVARIANCE
PARTICLE INTERACTIONS
STARK EFFECT