Prof.
Mary Hall Reno
(University of Iowa)
08/05/2017, 14:30
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
As the leading high energy neutrino background to the diffuse astrophysical neutrino flux, the flux of neutrinos produced in the PeV energy range by cosmic ray interactions in the atmosphere is of particular interest. The prompt atmospheric neutrino flux is evaluated in three frameworks: next to leading order QCD, kT factorization including low-x resummation, and in the dipole model. A...
Ali Kheirandish
(o=research,ou=Institutions,dc=icecube,dc=wisc,dc=edu)
08/05/2017, 14:45
Multi-Messenger - Convenor: Elisa Resconi, TUM
We evaluate the prospects for detecting the neutrino emission from sources in the Galactic plane assuming that the highest energy photons originate from the decay of pions, which yields a straightforward prediction for the neutrino flux from the decay of the associated production of charged pions. Four promising sources are identified based on having a large flux and a flat spectrum. We...
Shirley Li
(The Ohio State University)
08/05/2017, 15:00
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
We are entering a new era of neutrino astronomy with the recent IceCube discovery of high-energy astrophysical neutrinos. Important questions, such as what their sources are, arise with these events. The flavor composition of these neutrinos has been identified as a rich observable, containing information about the production processes and neutrino properties. So far, only $\nu_\mu$ charged...
Prof.
Thomas Weiler
(Vanderbilt University)
08/05/2017, 15:15
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
already given
Ms
Natasha Atkins
(University of Adelaide)
08/05/2017, 15:30
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
IceCube has observed a diffuse flux, for which we now need to determine the origin - which could possibly be a combination of galactic and extra-galactic sources. A number of authors have suggested that our galaxy can account for the whole IceCube flux. However, we know that our galaxy is not unique and that there must be other similar galaxies in the rest of the Universe producing neutrinos...
Dr
Zhuo Li
(Peking University)
08/05/2017, 15:45
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
The sources of IceCube detected high energy neutrinos are unknown. During the processes of high energy neutrino production, there should be accompanying gamma-ray emission from neutral pion decay or secondary charged particle emission. Even in the processes that gamma-ray emission is dominated by accelerated electrons, there could be a relation between gamma-ray and neutrino emission....
Dr
Ranjan Laha
(KIPAC, Stanford University and SLAC National Accelerator Laboratory, USA)
08/05/2017, 16:30
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
The IceCube neutrino discovery was punctuated by three showers with $E_\nu$ ~ 1-2 PeV. Interest is intense in possible fluxes at higher energies, though a marked lack of $E_\nu$ ~ 6 PeV Glashow resonance events implies a spectrum that is soft and/or cutoff below ~few PeV. However, IceCube recently reported a through-going track event depositing 2.6 $\pm$ 0.3 PeV. A muon depositing so much...
Dr
Antoine Kouchner
(APC-University Paris Diderot)
08/05/2017, 16:45
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
ANTARES, the largest underwater neutrino telescope, has been continuously operating since 2007 in the Mediterranean Sea. The transparency of the water allows for a very good angular resolution in the reconstruction of neutrino events of all flavors. This results in unprecedented sensitivity for neutrino source searches in the Southern Sky at TeV energies, so that already valuable constraints...
Mike Richman
(o=drexel,ou=Institutions,dc=icecube,dc=wisc,dc=edu)
08/05/2017, 17:00
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
The IceCube neutrino observatory has observed a flux of high-energy astrophysical neutrinos using both track events from muon neutrino interactions and cascade events from interactions of all neutrino flavors. Searches for astrophysical neutrino sources have focused on track events due to the significantly better angular resolution of track reconstructions. To date, no such sources have been...
Christian Haack
(o=rwth,ou=Institutions,dc=icecube,dc=wisc,dc=edu)
08/05/2017, 17:15
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
The origin of high-energy astrophysical neutrinos measured by the IceCube Neutrino Observatory remains a mystery despite extensive searches for multimessenger correlations. In particular, no point sources have been identified so far. However a likely source for diffuse neutrino emission are cosmic-ray interactions in the galactic plane. Due to the excellent pointing of their track-like...
Mr
René Reimann
(RWTH Aachen)
08/05/2017, 17:30
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
Using a sample of neutrino-induced muon track events, IceCube has confirmed the high-energy diffuse astrophysical neutrinos flux, first found in a sample of high energy starting events. In order to identify the sources of this diffuse flux, these muon-neutrino events are ideal because of their excellent angular resolution. Here we present a search for point-like neutrino sources based on the...
Sam Fahey
(o=uwmad,ou=Institutions,dc=icecube,dc=wisc,dc=edu)
08/05/2017, 17:45
Multi-Messenger - Convenor: Elisa Resconi, TUM
Fast radio bursts (FRBs) are bright millisecond-duration radio transients with high dispersion measures, suggesting extragalactic origin. Since their first discovery in 2007, FRBs have been observed at more than a dozen unique locations, with one source producing many repeated bursts. This repeating burst is the only FRB to which the distance has been measured. Many emission models have been...
Dr
Donglian Xu
(University of Wisconsin-Madison)
09/05/2017, 16:30
Accelerator-Based Neutrinos - Convenor: Jennifer Thomas, University College London
The IceCube Neutrino Observatory has observed a diffuse astrophysical neutrino flux, consistent with equal mixture of neutrino flavors. Regardless of the production mechanism at the source, an appreciable amount of tau neutrinos is expected via mixing over astronomical distances. Identification of tau neutrinos is essential for the precise measurement of the astrophysical neutrino flavor...
Kyle Jero
(o=uwmad,ou=Institutions,dc=icecube,dc=wisc,dc=edu)
09/05/2017, 16:45
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
The IceCube analyses that identify the astrophysical neutrino flux from the southern hemisphere must reject muons and neutrinos from the atmosphere. To do this, the analyses use the outer regions of the detector to identify and reject penetrating muon tracks produced by cosmic ray interactions with the atmosphere. In doing so they can remove atmospheric neutrinos and muons. By using the outer...
Sally Robertson
(o=adelaide,ou=Institutions,dc=icecube,dc=wisc,dc=edu)
09/05/2017, 17:00
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
The IceCube neutrino observatory relies on the ability to reconstruct the energies of muon events for a wide range of analyses, including all astrophysical diffuse analyses. Current methods use the mean energy loss rate of the events with good results found after effectively truncating the largest losses. Here we discuss a new energy reconstruction method which uses topological information of...
Gabriel Collin
(o=mit,ou=Institutions,dc=icecube,dc=wisc,dc=edu)
09/05/2017, 17:15
Multi-Messenger - Convenor: Elisa Resconi, TUM
The Non-Poissonian Template Fitting (NPTF) technique has been used to show that the excess of gamma rays observed by Fermi is likely due to a population of unresolved point sources rather than dark matter emission. The IceCube experiment has positively identified neutrinos of astrophysical origin, but as yet, no point sources have been resolved. We present an analysis that applies NPTF to...
Ke Fang
(o=umd,ou=Institutions,dc=icecube,dc=wisc,dc=edu)
09/05/2017, 17:30
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
The origin of astrophysical neutrinos remains a mystery. The isotropic spacial distribution of the observed events implies that to detect point sources, both order-of-magnitude more statistics and more advanced search tools are needed. Here we introduce a maximum-likelihood method for search of point-like sources using event pairs. We show that when a decent angular resolution is available,...
Eric Oberla
(KICP University of Chicago)
09/05/2017, 17:45
Neutrino Astronomy - Convenor: Gisela Anton, FAU / ECAP
Ground-based radio arrays offer a promising future for the detection of high energy neutrinos, including the prospect of reducing the energy threshold of the radio detection technique to a level necessary to overlap with the high-energy range probed by IceCube ($\sim$10-100~PeV). Contemporary ground-based radio arrays, such as ARIANNA and ARA, are designed primarily to detect coherent radio...
