6533b825fe1ef96bd128327a
RESEARCH PRODUCT
Constraint on the coupling of axionlike particles to matter via ultracold neutron gravitational experiment
K.v. ProtasovA. Yu. VoroninValery NesvizhevskyS. Baeßlersubject
Nuclear and High Energy PhysicsParticle physicsPhysics::Instrumentation and DetectorsFOS: Physical sciencesElementary particle01 natural sciencesHigh Energy Physics - Phenomenology (hep-ph)Gravitational field14.80.Mz 04.80.-ygravitational experiments0103 physical sciencesultracold neutronsNeutron010306 general physicsNuclear ExperimentAxionPhysics010308 nuclear & particles physicsFermionCoupling (probability)Quantum numbergravityCP invarianceHigh Energy Physics - Phenomenology[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Ultracold neutronsdescription
We present a new constraint for the axion monopole-dipole coupling in the range of 1 micrometer to a few millimeters, previously unavailable for experimental study. The constraint was obtained using our recent results on the observation of neutron quantum states in the Earth's gravitational field. We exploit the ultimate sensitivity of ultra-cold neutrons (UCN) in the lowest gravitational states above a material surface to any additional interaction between the UCN and the matter, if the characteristic interaction range is within the mentioned domain. In particular, we find that the upper limit for the axion monopole-dipole coupling constant is (g_p g_s)/(\hbar c)<2 x 10^{-15} for the axion mass in the ``promising'' axion mass region of ~1 meV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-10-25 |