1,720,997 research outputs found
Recommended from our members
The atmospheric neutrino flavor ratio in Soudan 2
Get PDFThe Soudan 2 collaboration has measured the atmospheric neutrino flavor ratio with 2.63 kiloton years of exposure. The measured flavor ratio is 0.67 {+-} 0.15(stat) + 0.04--0.06(syst). The neutrino induced horizontal muon flux has been measured to be {Phi}{sub {mu}} = (4.12 {+-} 1.1 {+-} 0.58) {times} 10{sup {minus}13} cm{sup {minus}2} sr{sup {minus}1} s{sup {minus}1}
Recommended from our members
Underground Muons From the Direction of Cygnus X-3 During the January 1991 Radio Flare
No full textMuons recorded in the Soudan 2 underground nucleon decay detector from January 1989 to February 1991 have been examined for any correlation with the radio flares of Cyguns X-3 observed during this period. On two nearby days during the radio flare of January 1991 a total of 32 muons within 2.0{degrees} of the Cyguns X-3 direction were observed when 11.4 were expected
Recommended from our members
Interactions of atmospheric {nu}{sub {mu}} and {nu}{sub e} observed in Soudan 2
No full textWe present preliminary measurements of the relative rates of atmospheric {nu}{sub {mu}} and {nu}{sub e} interactions from the first 0.5 kton-year exposure of the Soudan 2 experiment. The results are consistent with deficit of {nu}{sub {mu}} relative to {nu}{sub e} reported by the water Cerenkov experiments, which may be evidence for neutrino oscillations
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Recommended from our members
Nucleon decay in Soudan 2.
Get PDFThe Soudan 2 detector is used to search for evidence of nucleon decay. Particular emphasis is put on searches for modes with multiple-charged particles in the final state, and for modes suggested by super-symmetric theories
Recommended from our members
Seasonal variations in Soudan 2.
Get PDFSeasonal Variations in an underground detector may be a signature for Dark Matter. The Soudan 2 detector searches for nucleon decay and atmospheric neutrinos. The trigger rate is about 0.5 Hertz. It is dominated by approximately equal numbers of atmospheric muons and low level radioactivityy. The muon rate has a seasonal variation of {+-}2%, which is consistent with a similar effect at MACRO. The MACRO effect has been correlated with temperature in the upper atmosphere. Our trigger rate has a seasonal variation of {+-}15% which we believe is due to radon in the mine, and variations in air flow with outside temperature
Recommended from our members
Neutrino induced muons in Soudan 2.
Get PDFThe neutrino-induced muon rate underground has been measured at Soudan 2. To discriminate from the intense background of atmospheric muons we consider only the through-going muons which originate from horizontal direction ({minus}0.14 < cos{theta} < 0.14). We calculate the horizontal, neutrino-induced muon rate at Soudan 2 from an exposure of 1.23 x 10{sup 8} s as {Phi}{sub {nu}{mu}} = (3.45 {+-} 0.52 {+-} 0.61) x 10{sup {minus}13} (cm{sup 2} sr s){sup {minus}1}
Recommended from our members
Search for AGN neutrinos with the Soudan 2 detector
No full textSeveral authors have presented models for neutrino production from Active Galactic Nuclei (AGN) that allow for the possibility of AGN neutrinos outnumbering the atmospheric neutrino flux for energies in excess of 30 TeV. Preliminary results from a search for high energy neutrinos from AGN using the underground Soudan 2 Detector are presented
Recommended from our members
The Soudan-2 honeycomb calorimeter
Get PDFSoudan 2 is an 1100-ton honeycomb tracking calorimeter which is being constructed to search for nucleon decay. The detector consists of finely segmented iron instrumented with long drift tubes, and records three spatial coordinates and dE/dx for every gas crossing. Excellent event reconstruction capability, particle identification and muon sign and direction determination give superior rejection of the neutrino background to nucleon decay in many modes. The first 620 tons of Soudan 2 are now in steady operation, with completion planned for 1992. Detector performance has been studied using cosmic ray tracks and a charged test beam calibration. Results on detector performance and detector response are described in this paper. 2 refs. , 11 figs
- …
