Eur. Phys. J. C (2009) 64: 19-23
https://doi.org/10.1140/epjc/s10052-009-1150-8

Regular Article - Experimental Physics

Limits on a nucleon–nucleon monopole–dipole coupling from spin relaxation of polarized ultra-cold neutrons in traps

Joint Institute for Nuclear Research, 141980, Dubna, Moscow Region, Russia

^* e-mail: pokot@nf.jinr.ru

Received: 26 June 2009
Published online: 19 September 2009

Abstract

A new limit is presented on the axion-like monopole–dipole P, T-non-invariant interaction in a range (10⁻⁴–1) cm. The spin-dependent nucleon–nucleon potential between neutrons and nucleons of the walls of the cavity containing ultra-cold neutrons should affect the neutron depolarization probability at their reflection from the walls. The limit is obtained from existing data on the ultra-cold neutron depolarization probability per one collision with the walls.