Impact of atomic parity violation measurements on precision electroweak physics

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.2724· OSTI ID:279189

Rosner, J L ^[1]

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1. Institute for Nuclear Theory, University of Washington, Seattle, Washington 98195 (United States)

The impact of atomic parity violation experiments on the determination of the weak mixing parameter sin{sup 2}{theta} and the Peskin-Takeuchi parameters {ital S} and {ital T} is reassessed in the light of recent electroweak measurements at CERN LEP, SLAC, and Fermilab. Since the weak charge {ital Q}{sub {ital W}} provides unique information on {ital S}, its determination with a factor of 4 better accuracy than present levels can have a noticeable effect on global fits. However, the measurement of {Delta}{ital Q}{sub {ital W}}/{ital Q}{sub {ital W}} for two different isotopes provides primarily information on sin{sup 2}{theta}. To specify this quantity to an accuracy of {plus_minus}0.0004, comparable to that now provided by other electroweak experiments, one would have to determine {Delta}{ital Q}{sub {ital W}}/{ital Q}{sub {ital W}} in cesium to about 0.1{percent} of its value, with comparable demands for other nuclei. The relative merits of absolute measurements of {ital Q}{sub {ital W}} and isotope ratios for discovering effects of new gauge bosons are noted briefly. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: University of Chicago
• DOE Contract Number: FG02-90ER40560
• OSTI ID: 279189
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ATOMS
CERN
FERMILAB TEVATRON
ISOTOPES
MIXING
PARITY
STANFORD LINEAR ACCELERATOR CENTER
VIOLATIONS