Limits on composition-dependent interactions using a laboratory source: Is there a ''fifth force'' coupled to isospin

Journal Article · Mon Feb 06 00:00:00 EST 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.62.609· OSTI ID:6527360

Stubbs, C W; Adelberger, E G; Heckel, B R; Rogers, W F; Swanson, H E; Watanabe, R; Gundlach, J H; Raab, F J

Previous ''fifth-force'' experiments searched for differential acceleration of test bodies placed near terrestrial sources. Because these sources have Napprox. =Z the results had little sensitivity to forces coupled to B-2L = N-Z. We searched for such forces by placing a 1-ton Pb source close to a Be/Al torsion balance. Our null results rule out (at 2sigma) the possibility that all previous composition-dependence results could be due to a force coupling predominantly to B-2L with a range lambda<100 m. We also set improved constraints on new interactions with 0.3less than or equal tolambdaless than or equal to10 m.

• Research Organization: Physics Department, University of Washington, Seattle, Washington 98195
• OSTI ID: 6527360
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 62:6
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GRAVITATIONAL FIELDS
EXPERIMENTAL DATA
ISOSPIN
LEAD
MEASURING METHODS
PENDULUMS
TORSION
DATA
ELEMENTS
INFORMATION
METALS
NUMERICAL DATA
PARTICLE PROPERTIES
657003* - Theoretical &amp; Mathematical Physics- Relativity &amp; Gravitation