منابع مشابه
Monopoles, Axions and Intermediate Mass Dark Matter
We present a solution to the cosmological problem encountered in (supersymmetric) grand unified theories due to copious monopole production at the end of hybrid inflation. By employing thermal inflation “driven” by the U(1) axion symmetry, the superheavy monopole flux can be naturally suppressed to values that should be accessible to dedicated large scale experiments. The U(1) axion symmetry al...
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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 ...
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A cosmological model in which the primordial perturbations are provided by global monopoles and in which the dark matter is cold has several interesting features. The model is normalized by choosing its single parameter within the bounds obtained from gravitational wave constraints and by demanding coherent velocity f1ows of about 600km/sec on scales of 50hMpc. Using this normalization, the mod...
متن کاملDark-Matter Electric and Magnetic Dipole Moments
We consider the consequences of a neutral dark-matter particle with a nonzero electric and/or magnetic dipole moment. Theoretical constraints, as well as constraints from direct searches, precision tests of the standard model, the cosmic microwave background and matter power spectra, and cosmic gamma rays, are included. We find that a relatively light particle with mass between an MeV and a few...
متن کاملEnergy Loss of Slowly Moving Magnetic Monopoles in Matter
Mal.vin A. Ruderman DePaxtment of Physics, CoEunzbia University, Ne York, Nezo York 10027 (Received 29 November 1982) The cross section for exciting simple atoms by slowly moving magnetic monopoles is calculated. Includirg the effects of the monopole magnetic field on the atomic energy levels, an energy loss per unit density is obtained that is much larger than previous studies. For helium (1/p...
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ژورنال
عنوان ژورنال: Journal of Experimental and Theoretical Physics
سال: 2018
ISSN: 1063-7761,1090-6509
DOI: 10.1134/s1063776118100011