نتایج جستجو برای: magnetic monopole
تعداد نتایج: 342521 فیلتر نتایج به سال:
We describe a search method for fast moving (β > 5×10) magnetic monopoles using simultaneously the scintillator, streamer tube and track-etch subdetectors of the MACRO apparatus. The first two subdetectors are used primarily for the identification of candidates while the track-etch one is used as the final tool for their rejection or confirmation. Using this technique, a first sample of more th...
There have been many searches for magnetic monopoles in ight, but few for monopoles in matter. We have searched for magnetic monopoles in meteorites, schists, ferromanganese nodules, iron ores and other materials. The detector was a superconducting induction coil connected to a SQUID (Superconducting Quantum Interference Device) with a room temperature bore 15 cm in diameter. We tested a total ...
We consider static U(1) monopole in non-commutative space. Up to the second order in the non-commutativity scale θ, we find no non-trivial corrections to the Dirac solution, the monopole mass remains infinite. We argue the same holds for any arbitrary higher order. Some speculation about the nature of non-commutative spacetime and its relation to the cosmological constant is made. Non-commutati...
A high precision numerical analysis of the static, spherically symmetric SU (2) magnetic monopole equations is carried out. Using multi-shooting and multi-domain spectral methods , the mass of the monopole is obtained rather precisely as a function of β = M H /M W for a large β-interval (M H and M W denote the mass of the Higgs and gauge field respectively). The numerical results necessitated t...
We address the problem of string arbitrariness in the quantum field theory of Dirac magnetic monopoles. Different prescriptions are shown to yield different physical results. The constraints due to the discrete symmetries (C and P) are derived for the process of electron-positron annihilation into the monopole-antimonopole pair. In the case of the annihilation through the one-photon channel, th...
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