arXiv subjects

Zh. -A. Dzhilkibaev

Publications and source records attributed to Zh. -A. Dzhilkibaev.

4 recordsLinked to original sources

arXiv2009

Acoustic search for high-energy neutrinos in Lake Baikal: status and perspectives

We report theoretical and experimental results of on-going feasibility studies to detect cosmic neutrinos acoustically in Lake Baikal. In order to examine ambient noise conditions and to develop respective pulse detection techniques a prototype device was created. The device is operating at a depth of 150 m at the site of the Baikal Neutrino Telescope and is capable to detect and classify acoustic signals with different shapes, as well as signals from neutrino-induced showers.

astro-ph.HE↗

arXiv2009

Search for a diffuse flux of high-energy neutrinos with the Baikal neutrino telescope NT200

We present the results of a new analysis of data taken in 1998-2002 for a search for high-energy extraterrestrial neutrinos. The analysis is based on a full reconstruction of high-energy cascade parameters: vertex coordinates, energy and arrival direction. Upper limits on the diffuse fluxes of all neutrino flavors, predicted by several models of AGN-like neutrino sources are derived. For an ${\bf E^{-2}}$ behavior of the neutrino spectrum, our limit is ${\bf E^{2} F_ν(E) < 2.9 \times 10^{-7}}$ cm${\bf ^{-2}}$ s${\bf ^{-1}}$ sr${\bf ^{-1}}$ GeV over a neutrino energy range ${\bf 2 \times 10^4 ÷2 \times 10^7}$ GeV. This limit is by a factor of 2.8 more stringent than a limit obtained with a previous analysis.

astro-ph.HE↗

arXiv2009

Survey of the Sun in the Lake Baikal Neutrino Experiment

Upward through-going muons in the Lake Baikal Neutrino Experiment arriving from the ecliptic plane have been analyzed using NT200 data samples of the years 1998-2002 (1007 live days). We derive upper limits on muon fluxes from annihilation processes of hypothetical WIMP dark matter particles in the center of the Sun.

astro-ph.HE↗

arXiv2001

A search for very high energy neutrinos with the Baikal Neutrino Telescope

We present the results of a search for high energy neutrinos with the Baikal underwater Cherenkov detector {\it NT-200.} An upper limit on the ($ν_e+\tilde{ν_e}$) diffuse flux of $E^2 Φ_ν(E)<(1.3 ÷1.9)\cdot 10^{-6} {cm}^{-2} {s}^{-1} {sr}^{-1} {GeV}$ within a neutrino energy range $10^4 ÷10^7 {GeV}$ is obtained, assuming an $E^{-2}$ behaviour of the neutrino spectrum and flavor ratio $(ν_e+\tilde{ν_e}):(ν_μ+\tilde{ν_μ})$=1:2.

astro-ph↗