Conveners
Neutrinos: IceCube Neutrino Signal
- Walter Winter (Wurzburg University)
Neutrinos: Astrophysics Neutrino Searches
- Carlos de los Heros (Uppsala University)
Neutrinos: Neutrino Physics, Atmospheric Neutrinos
- Walter Winter (Wurzburg University)
Neutrinos: Future Prospects
- Carlos de los Heros (Uppsala University)
Neutrinos: Sterile Neutrinos
- Carsten Rott (Sungkyunkwan University)
Neutrinos: Neutrino Properties
- Carsten Rott (Sungkyunkwan University)
Markus Ahlers
6/24/14, 2:30 PM
Neutrinos
Presentation
The recent IceCube observation of astrophysical neutrinos in the TeV-PeV energy range has opened a new window to the high-energy Universe. The origin of this flux is unknown. Cosmic neutrinos at PeV energies are produced by hadronic interactions of cosmic ray (CR) nucleons at 20-30 PeV and can possibly be related to a Galactic source population. I will review Galactic candidate sources of...
Julia Tjus
6/24/14, 2:50 PM
Neutrinos
Presentation
Recently, the IceCube collaboration has announced a first evidence of a high-energy neutrino signal from astrophysical sources. The signal, based on a number of 28 events, is at a level of approximately $E^{2}*dN/dE\sim 10^{-8}$ GeV/(s sr cm$^{2}$) and at this point does not show any directional correlation. In this talk, the different cosmic ray emitting source candidates are reviewed in the...
Mauricio Bustamante
(DESY Zeuthen / Universität Würzburg)
6/24/14, 3:10 PM
Neutrinos
Presentation
The origin of ultra-high energy cosmic rays (UHECRs), with energies above $10^{18}$ eV, remains unknown fifty years after their discovery. Gamma-ray bursts (GRBs) are arguably among the most likely sources: their high luminosities (> $10^{52}$ erg/s) hint at the possibility that strong magnetic fields in them are able to shock-accelerate protons to the high energies that are necessary to...
Irene Tamborra
6/24/14, 3:30 PM
Neutrinos
Presentation
Star-forming galaxies are predicted to contribute considerably to the cosmic gamma-ray background as they are the most numerous population of gamma-ray sources. The hadronic
interactions responsible for high-energy gamma rays also produce high-energy neutrinos. We discuss the expected intensity of the diffuse high-energy neutrinos from star-forming galaxies and conclude that such a population...
Viviana Niro
(U)
6/24/14, 3:45 PM
Neutrinos
Presentation
We revisit the prospect of observing the sources of the Galactic cosmic rays. In particular, we update the predictions for the neutrino flux expected from sources in the nearby star-forming region in Cygnus, considering the recent TeV gamma ray measurements of their spectra. We focus on three Milagro sources: MGRO J2019+37, MGRO J1908+06 and MGRO J2031+41 and calculate the confidence level...
Asen Christov
(Universite de Geneve (CH))
6/24/14, 4:30 PM
Neutrinos
Presentation
We have performed a variety of searches for neutrino emission from astrophysical sources using multiple years of IceCube data collected between April 2008 and May 2011 by the partially-completed IceCube detector, as well as the first year of data from the completed 86-string detector. Utilizing spatial, energy and time information, an unbinned maximum likelihood method is used to distinguish...
Anna Bernhard
(TU München)
6/24/14, 4:50 PM
Neutrinos
Presentation
The IceCube neutrino observatory built in the antarctic ice offers unique opportunities for studying high energy neutrino emission from galactic and extragalactic sources. Detecting such neutrino emission could give invaluable information about the origin of cosmic rays. Recently, the first evidence for astrophysical neutrinos in the PeV range was found with IceCube. No identification of point...
Mr
Achim Stoessl
(DESY)
6/24/14, 5:05 PM
Neutrinos
Presentation
Recent results from IceCube show evidence for a diffuse, highly energetic flux of astrophysical neutrinos. The analysis to select neutrino candidate events employ veto techniques which use the outer part of the detector to suppress the atmospheric muon background. Shower-like events comprise an important part of observed evidence for extraterrestrial neutrino induced events for the veto...
aart heijboer
(nikhef)
6/24/14, 5:20 PM
Neutrinos
Presentation
Operating off the coast of France since 2007, the ANTARES neutrino telescope
is the most sensitive high energy neutrino telescope in the Northern
Hemisphere. I will present an overview of the science output, including
searches for neutrinos from the Fermi bubbles regions and GRBs. Emphasis
will be on results from a recent time-integrated search for point-like sources
of neutrinos. At...
Florian Folger
(University of Erlangen)
6/24/14, 5:40 PM
Neutrinos
Presentation
The ANTARES neutrino telescope, located in the deep sea offshore the French Mediterranean coast, aims at the detection of cosmic neutrinos in the TeV/PeV range. It has been continuously taking data since 2007. In this contribution a search for a diffuse cosmic neutrino flux is presented. The focus is laid on a recently finished analysis of showering events induced by all three neutrino...
Agustín Sánchez Losa
(IFIC (Spain))
6/24/14, 5:55 PM
Neutrinos
Presentation
ANTARES is currently the largest operating neutrino telescope in the Northern Hemisphere, mainly sensitive to TeV neutrinos. Its main goal is the detection of high energy neutrinos from astrophysical sources, which would provide important insights about the processes powering their engines and would help understand the origin of high energy cosmic rays.
To identify unambiguously such...
Erwin Visser
(Nikhef)
6/24/14, 6:10 PM
Neutrinos
Presentation
A guaranteed source of neutrinos is the production in cosmic ray interactions with the interstellar matter in our galaxy. The Antares neutrino telescope located in the Mediterranean Sea offers a high visibility of the central region of the Milky Way where most of this diffuse neutrino flux is expected. Antares data from 2007-2012 were used to compare the flux from a region centered around the...
Dr
Antonio Palazzo
(MPI)
6/25/14, 2:30 PM
Neutrinos
Presentation
I will present the current status of the global neutrino data analysis, pointing out its unique role in constraining the two crucial (still) unknown parameters: the CP-violating phase delta and the theta_23 octant. In this context, I will discuss the slight overall preference for theta_23 in the first octant and for non-zero CP violation with sin delta < 0. The (in-)stability of such...
Edward Kearns
(Boston University)
6/25/14, 2:50 PM
Neutrinos
Presentation
I will review the latest results in neutrino physics from the Super-Kamiokande experiment, on behalf of the collaboration. Super-Kamiokande is a 50-kton water Cherenkov detector located in Kamioka Japan, operational since 1996. The Super-K collaboration studies atmospheric neutrinos, solar neutrinos, supernova neutrinos, and neutrinos from possible dark matter annihilation.
Benjamin Büttner
(University of Hamburg)
6/25/14, 3:05 PM
Neutrinos
Presentation
The OPERA experiment is designed to search for $ \nu_\mu \rightarrow \nu_\tau $ oscillations in appearance mode through the direct observation of the $ \tau $ lepton in $ \nu_\tau $ Charged Current interactions. The $ \nu_\tau $ CC interaction is identified through the detection of the $ \tau $ lepton decay topology in the so called Emulsion Cloud Chamber (ECC), passive lead plates...
Rikard Enberg
(Uppsala University)
6/25/14, 3:20 PM
Neutrinos
Presentation
Atmospheric neutrinos and muons are produced in interactions of cosmic rays with Earth's atmosphere. At very high energy, the contribution from semi-leptonic decays of charmed hadrons, known as the prompt flux, dominates over the conventional flux from pion and kaon decays. This is due to the very short lifetime of the charmed hadrons, which therefore do not lose energy before they decay. The...
Prof.
Michele Maltoni
(Instituto de Fisica Teorica UAM/CSIC)
6/25/14, 3:40 PM
Neutrinos
Presentation
In this talk we will discuss the physics reach of present and future atmospheric neutrino experiments, both in the context of the standard three-neutrino oscillations scenario and in the presence of New Physics. A particular attention will be devoted to the impact on the determination of the neutrino mass hierarchy.
Mikko Meyer
(University of Hamburg)
6/25/14, 4:30 PM
Neutrinos
Presentation
The Borexino experiment is a 300 t liquid scintillator detector located at the LNGS in Italy. The main task of the experiment is the real time detection of solar neutrinos. This talk will give an overview of the recent results from the first phase of the experimental program including the measurement of solar neutrinos as well as geoneutrinos.
Furthermore an overview of the SOX project is...
Hiroyuki Sekiya
(University of Tokyo)
6/25/14, 4:50 PM
Neutrinos
Presentation
Hyper-Kamiokande (Hyper-K) will be a next generation underground water Cherenkov detector with the total (fiducial) mass
of 0.99 (0.56) million metric tons, which is approximately 20 (25) times larger than that of Super-Kamiokande.
One of the main goals of Hyper-K is the study of CP asymmetry in the lepton sector using accelerator
neutrino and anti-neutrino beams. With a total exposure...
Dr
Carl Gilbert Pfendner
(Ohio State University (USA))
6/25/14, 5:10 PM
Neutrinos
The cosmic ray flux cut off above primary energies of $10^{19.5}$ eV leads us to expect an ultra-high energy (UHE) neutrino flux due to the GZK effect. The detection of these UHE cosmic neutrinos will add to the understanding of the sources and physics of UHE cosmic rays.
On interacting within a dense medium, a UHE neutrino will produce an extended particle shower, which in turn produces a...
Dr
Harm Schoorlemmer
(University of Hawaii at Manoa)
6/25/14, 5:30 PM
Neutrinos
Presentation
The Antarctic Impulsive Transient Antenna (ANITA) is a balloon-borne ultra-high-energy particle observatory. At a cruising altitude of $\sim$36 km, it provides a panoramic view of the Antarctic ice sheet in the 200-1200 MHz band. ANITA has been designed to detect Askaryan radiation from ultra-high-energy ($>10^{18}$ eV) neutrino interactions in the ice. Two successful flights have led to...
Thomas Schwetz-Mangold
(Stockholm University (SE))
6/27/14, 2:30 PM
Neutrinos
I will discuss the status of several hints for sterile neutrinos at the eV scale. While those hints point towards a similar neutrino mass scale various constraints on the mixing angles make it difficult to obtain a good description of all data simultaneously. I will review the situation from oscillation experiments and mention briefly additional constraints from cosmology.
Maria Archidiacono
(Aarhus University)
6/27/14, 2:50 PM
Neutrinos
Presentation
In the last few years the imprint of light sterile neutrinos on cosmological data sets has been deeply investigated within the framework of different theoretical scenarios. Nevertheless the question whether cosmology can accommodate the existence of additional neutrinos is still open. The strong dependence of the results on the underlined cosmological model and on the included data sets...
Arman Esmaili Taklimi
6/27/14, 3:10 PM
Neutrinos
Presentation
Atmospheric neutrino data collected by huge neutrino telescopes, such as IceCube, provide the opportunity to probe new physics unprecedentedly, both due to high statistics and the high energy range. In this talk I discuss the effect of sterile neutrinos on atmospheric neutrino flux. I present the current constraints on active-sterile mixing obtained from IC-40 and IC-79 data sets. Also the...
Jacob Lamblin
(U)
6/27/14, 3:30 PM
Neutrinos
Presentation
All previous neutrino oscillation experiments at short distance from reactors have measured a small deficit of neutrinos with respect to predictions. This deficit could be explained either by a systematic error on the flux prediction, either by the existence of a new neutrino state, a light sterile neutrino. This new neutrino with no ordinary weak interaction would not be directly detected but...
Valentina De Romeri
(CNRS)
6/27/14, 3:45 PM
Neutrinos
Presentation
We investigate the contribution of sterile states to the anomalous magnetic and electric dipole moments of charged leptons. Furthermore, as a specific example, we study this effect in a low-scale seesaw model. We perform a complete numerical study scanning the relevant parameter space of the models.
Douglas Cowen
(Pennsylvania State University)
6/27/14, 4:30 PM
Neutrinos
Presentation
The Precision IceCube Next Generation Upgrade (PINGU) is a proposed IceCube in-fill array designed to measure the neutrino mass hierarchy using atmospheric neutrino interactions in the ice cap at the South Pole. PINGU will have a neutrino energy threshold of a few GeV with a multi-megaton effective volume. We present PINGU's expected sensitivity to the hierarchy with optimized geometry and...
Michael Schmidt
(The University of Melbourne)
6/27/14, 4:50 PM
Neutrinos
Presentation
To unravel the mystery of neutrino masses and mixing angles, we adopt a bottom-up approach based on effective operators which violate lepton number by two units. By opening the effective operators, we can find the corresponding minimal UV completions. We discuss how the minimal UV completions of the dimension-7 operators can be tested at the LHC as well as one example based on a dimension-9 operator.
Aurora Meroni
(Università Roma Tre/LNF)
6/27/14, 5:10 PM
Neutrinos
Presentation
Determining the nature - Dirac or Majorana - of massive neutrinos, possibly related to a New Physics scale beyond that predicted by the Standard Model is a fundamental problem under study. Significant experimental efforts have been made to unveil the possible Majorana nature of massive neutrinos by searching for neutrinoless double beta decay with increasing sensitivity. These constraints,...
Stefano Morisi
6/27/14, 5:30 PM
Neutrinos
Presentation
Sterile neutrino is the most straightforward example connecting neutrino physics and DM. But there are different possibilities. For instance if neutrino masses are generated radiatively then new fields must be assumed and they could be good DM candidates. Another example is in the context of flavor symmetries. Spontaneous breaking of flavor symmetries can give an explanation for the stability...
Dr
Kwang-Chang Lai
(Chang Gung University)
6/27/14, 5:50 PM
Neutrinos
Presentation
The determination of neutrino flavor transition mechanism by neutrino telescopes is presented. With a model-independent parametrization, we are able to classify flavor transitions (such as standard three-flavor oscillations, neutrino decays or others) of astrophysical neutrinos propagating from their sources to the Earth. We demonstrate how one can constrain parameters of the above...
170.
Determination of (sterile/active) neutrino absolute masses in Hyper-K by detecting SN neutrinos
Kazunori Kohri
(K)
6/27/14, 6:10 PM
Neutrinos
Presentation
TBD
