학술논문
Limits on composition-dependent interactions using a laboratory source: Is there a ''fifth force'' coupled to isospin
Document Type
Journal Article
Author
Source
Phys. Rev. Lett.; (United States); 62:6
Subject
Language
English
Abstract
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.