21 research outputs found
The search for transient astrophysical neutrino emission with IceCube-DeepCore
We present the results of a search for astrophysical sources of brief transient neutrino emission using IceCube and DeepCore data acquired between 2012 May 15 and 2013 April 30. While the search methods employed in this analysis are similar to those used in previous IceCube point source searches, the data set being examined consists of a sample of predominantly sub-TeV muon-neutrinos from the Northern Sky (-5 degrees < delta < 90 degrees) obtained through a novel event selection method. This search represents a first attempt by IceCube to identify astrophysical neutrino sources in this relatively unexplored energy range. The reconstructed direction and time of arrival of neutrino events are used to search for any significant self-correlation in the data set. The data revealed no significant source of transient neutrino emission. This result has been used to construct limits at timescales ranging from roughly 1 s to 10 days for generic soft-spectra transients. We also present limits on a specific model of neutrino emission from soft jets in core-collapse supernovae
Working Group Report on the Structure of the Proton
We summarize the developments on the structure of the proton that were
studied at the Workshop on "HERA Physics" that was held in Durham in September
1995. We survey the latest structure function data; we overview the QCD
interpretations of the measurements of the structure functions and of final
state processes; we discuss charm production and the spin properties of the
proton.Comment: 45 pages, latex file using epsfig and ioplppt macros. Figures
included, but full resolution figure files and postscript file of the whole
paper are available via anonymous ftp at
ftp://cpt1.dur.ac.uk/pub/preprints/dtp96/dtp962
Search for dark matter annihilations in the Sun with the 79-string IceCube detector
We have performed a search for muon neutrinos from dark matter annihilation in the center of the Sun with the 79-string configuration of the IceCube neutrino telescope. For the first time, the DeepCore subarray is included in the analysis, lowering the energy threshold and extending the search to the austral summer. The 317 days of data collected between June 2010 and May 2011 are consistent with the expected background from atmospheric muons and neutrinos. Upper limits are set on the dark matter annihilation rate, with conversions to limits on spin-dependent and spin-independent scattering cross sections of weakly interacting massive particles (WIMPs) on protons, for WIMP masses in the range 20-5000ââGeV/c2. These are the most stringent spin-dependent WIMP-proton cross section limits to date above 35ââGeV/c2 for most WIMP models
Finite volume method to solve electromagnetic diffraction problem
Communication to : ICOLSE'99 international conference on lightning and static electricity, Toulouse (France), June 22-24, 1999Available from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1999 n.65 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueSIGLEFRFranc