Polarized 3He as a probe for short-range spin-dependent interactions

Details Polarized 3He as a probe for short-range spin-dependent interactions Polarized 3He as a probe for short-range spin-dependent interactions

2010-09-17

arxiv.org/abs/1009.3434v2

Phys.Rev.Lett.105:170401,2010

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevLett.105.170401

We have studied the relaxation of a spin-polarized gas in a magnetic field, in the presence of short-range spin-dependent interactions. As a main result we have established a link between the specific properties of the interaction and the dependence of the spin-relaxation rate on the magnitude of the holding magnetic field. This allows us to formulate a new, extremely sensitive method to study (pseudo-) magnetic properties at the sub-millimeter scale, which are difficult to access by other means. The method has been used as a probe for nucleon-nucleon axion-like P,T violating interactions which yields a two-order-of-magnitude improved constraint on the coupling strength ($g_s g_p$) as a function of the force range ($\lambda$): $g_s g_p \lambda^2 < 3 \times 10^{-27}$ m$^2$.

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