Direct experimental limit on neutron-mirror-neutron oscillations.
نویسندگان
چکیده
In case a mirror world with a copy of our ordinary particle spectrum would exist, the neutron n and its degenerate partner, the mirror neutron n', could potentially mix and undergo nn' oscillations. The interaction of an ordinary magnetic field with the ordinary neutron would lift the degeneracy between the mirror partners, diminish the n' amplitude in the n wave function and, thus, suppress its observability. We report an experimental comparison of ultracold neutron storage in a trap with and without superimposed magnetic field. No influence of the magnetic field is found and, assuming negligible mirror magnetic fields, a limit on the oscillation time taunn' > 103 s (95% C.L.) is derived.
منابع مشابه
neutron–mirror neutron oscillations
The existence of a mirror world holding a copy of our ordinary particle spectrum could lead to oscillations between the neutron (n) and its mirror partner (n0). Such oscillations could manifest themselves in storage experiments with ultracold neutrons whose storage lifetime would depend on the applied magnetic field. Here, extended details and measurements from the first dedicated experimental ...
متن کاملOn the experimental search for neutron→mirror neutron oscillations
Fast neutron→mirror neutron (n → n′) oscillations were proposed recently as the explanation of the GZK puzzle. We discuss possible laboratory experiments to search for such oscillations and to improve the present very weak constraints on the value of the n → n′ oscillation probability. PACS: 11.30.Er; 95.35.+d; 14.20.Dh; 28.20.-v
متن کاملThe safety of a landmine detection system using graphite and polyethylene moderator
Background: Several landmine detection methods, based on nuclear techniques, have been suggested up to now. Neutron-induced gamma emission, neutron and gamma attenuation, and fast neutron backscattering are the nuclear methods used for landmine detection. In this paper an optimized (safe and effective) moderating structure using an 241Am-Be neutron source for detecting landmines has been invest...
متن کاملSearching for Mirror Neutron - Neutron Oscillations
The corner stone of standard model of particle physics is the Lorentz symmetry (a special result of which is Einstein’s special theory of relativity). It was shown by G. Lüders and Pauli that Lorentz symmetry translates to the join conservation of the three discrete symmetries of Charge inversion, Parity inversion and Time inversion [1, 2]. This equivalence is known as CPT theorem. Weak nuclear...
متن کاملImplementation of neutron radiography in the MNSR Low Power Research Reactor
Neutron radiography is an unique, advanced and useful non-destructive test method in various industries and researches. Nuclear reactors are powerful and stable neutron sources for the neutron radiography system. In this research, the MNSR research reactor has been used as a neutron source for a neutron radiography system, and its neutron beam parameters have been evaluated. Also, using the dir...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 99 16 شماره
صفحات -
تاریخ انتشار 2007