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A new experimental limit on neutron-antineutron oscillations


The experimental search for neutron-antineutron oscillations has been completed at the ILL high flux reactor at Grenoble. A neutron beam of intensity 1011 n s−1 was propagated for a timet≅0.1 s in vacuum in a region shielded against the external magnetic field. No antineutron was detected in 2.4·107 s running time. The lower limit\(\tau _{n\bar n} \mathbin{\lower.3ex\hbox{$\buildrel>\over{\smash{\scriptstyle=}\vphantom{_x}}$}} 0.86 \cdot 10^8 \) s for\(n\bar n\) transitions was established at 90% C.L.

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Baldo-Ceolin, M., Benetti, P., Bitter, T. et al. A new experimental limit on neutron-antineutron oscillations. Z. Phys. C - Particles and Fields 63, 409–416 (1994).

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  • Magnetic Field
  • Field Theory
  • Elementary Particle
  • Lower Limit
  • Quantum Field Theory