title: Constraints on short-range spin-dependent interactions from scalar spin-spin coupling in deuterated molecular hydrogen.
abstract: A comparison between existing nuclear magnetic resonance measurements and calculations of the scalar spin-spin interaction (J coupling) in deuterated molecular hydrogen yields stringent constraints on anomalous spin-dependent potentials between nucleons at the atomic scale (∼ 1 Å). The dimensionless coupling constant g(P)(p)g(P)(N)/4 π associated with the exchange of pseudoscalar (axionlike) bosons between nucleons is constrained to be less than 3.6 × 10(-7) for boson masses in the range of 5 keV, representing improvement by a factor of 100 over previous constraints. The dimensionless coupling constant g(A)(p)g(A)(N)/4 π associated with the exchange of an axial-vector boson between nucleons is constrained to be g(A)(p)g(A)(N)/4 π<1.3 × 10(-19) for bosons of mass ≲ 1000 eV, improving constraints at this distance scale by a factor of 100 for proton-proton couplings and more than 8 orders of magnitude for neutron-proton couplings.
authors.affiliation: Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA.
authors.forename: M P
authors.initials: MP
authors.lastname: Ledbetter
authors.affiliation: Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: M V
authors.initials: MV
authors.lastname: Romalis
authors.affiliation: Department of Physics, California State UniversityEast Bay, Hayward, California 94542-3084, USA.
authors.forename: D F Jackson
authors.initials: DF
authors.lastname: Kimball