Neutralinos are the natural well-motivated candidates to provide the non-baryonic dark matter of the universe which may produce detectable signals through their annihilation into neutrinos, photons or positrons. Due to its high flux sensitivity and low energy threshold, the MAGIC Cherenkov telescope could potentially detect the neutralino annihilation high energy photon products. In the framewo...

The decay ω(782) → 5π in chiral theory. Abstract The arguments are put forward that the many pion decays ω → 2π + 2π − π 0 and π + π − 3π 0 provide an ideal test site for testing the predictions of chiral models of the vector meson decays into many pions. Using the approach based on the Weinberg Lagrangian or, in a new language, the Lagrangian of hidden local symmetry added with the term induce...

An exploration of dislocation microstructure evolution with different misorientation angles was performed using phase field crystal method (PFC). The microcosmic process grain boundaries under external stress, as well the corresponding energy curve and stress–strain curve, are analyzed. relationship between angle dislocations emission frequency is discussed. Three forms reaction on 6° 10° analy...

We present a complete calculation of the cross section for neutralino annihilation into the two-gluon final state. This channel can be quite important for the phenomenology of neutralino annihilation due to the well-known helicity suppression of neutralino annihilation into light quarks and leptons. In addition, we calculate the cross section for annihilation of neutralinos into a gluon and qua...

Positron annihilation spectroscopy is nowadays well recognised as a powerful tool of microstructure investigations of condensed matter. An overview of the method aimed for users from other fields is given and supplemented with several examples of applications.

In the generalized off-shell free energy landscape, black holes can be treated as thermodynamic topological defects. The local properties of spacetime reflected by winding numbers at defects, while global nature classified number which is sum all numbers. We propose that calculated via residues isolated one-order pole points characterized functions constructed from energy. Using residue method,...

Recent claims of a line in the Fermi-LAT photon spectrum at 130 GeV are suggestive of dark matter annihilation in the galactic center and other dark matter-dominated regions. If the Fermi feature is indeed due to dark matter annihilation, the best-fit line cross-section, together with the lack of any corresponding excess in continuum photons, poses an interesting puzzle for models of thermal da...