We discuss a way of observing intermediate-mass black holes which may exist in the Galaxy. We show that these black holes form clusters which could be identified as gamma-ray sources.
The possibility of identifying some of Galactic gamma-ray sources as clusters of primordial black holes is discussed. The known scenarios of supermassive black hole formation indicate the multiple formation of lower-mass black holes. Our analysis demonstrates that due to Hawking evaporation the cluster of black holes with masses about 1015g could be observed as a gamma-ray source. The total mass of typical cluster is ∼10M⊙. Detailed calculations have been performed on the basis of specific model of primordial black hole formation.
The Life and Legacy of Pomeranchuk (L B Okun) Cosmology at the Turn of the Century (A D Dolgov) Anisotropic Colored Superfluids (J Hosek) String Models and Hadron-Excited States on the Regge Trajectories (G S Sharov) Spherical Spinors on the Sphere (Jr A A Abrikosov) Induced Quantum Long-Range Interactions in General Relativity (I B Khriplovich & G G Kirilin) Radiation from Chiral Cosmic Strings (E O Babichev & V I Doluchaev) Massive Primordial Black Holes in Hybrid Inflation (S G Rubin) Metallic Conductivity in Disordered Electron Systems (B N Narozhny) Quasi-Solvable Quantum Many-Body Systems of Inozemtsev Type (T Tanaka) and other papers
Expressions are obtained for angular and energy distributions in the processes e/sup +/e/sup -/..--> nu..nu-barH, e/sup +/e/sup -/H which proceed via ''fusion'' of gauge W and Z/sup 0/ bosons. The possibility is noted of observing the non-standard charged Higgs boson in the reaction e/sup +/e/sup -/..-->..H/sup +- /e/sup minus-or-plus/nu-bar(..nu..).
Exact expressions are obtained for the energy spectra of secondary leptons e and ..mu.. from the decays of heavy leptons L/sup + -/produced in the reaction e/sup +/+e/sup -/..-->..L/sup +/+L/sup -/. It is shown that the specific properties of these spectra make it possible to identify the reaction of heavy-lepton production in the e/sup +/e/sup -/ annihilation process and to determine the masses of the heavy lepton L/sup + -/and its neutral partner ..nu../sub L/(nu-bar/sub L/). Calculations are carried out under the assumption that the current (L-bar..nu../sub L/) has a V +- A structure.
It is shown that the singularities of the energy spectrum of the muons or electrons from leptonic decays of heavy leptons produced in the process e/sup +/e/sup -/..-->..L/sup +/L/sup -/ make it possible to distinguish this process from others and to determine the mass of the heavy leptons from the position of the maximum of the spectrum. (AIP)