Claudio Kopper
18/07/2013, 09:00
Astroparticle Physics
Talk presentation
Observing astrophysical neutrinos can provide a unique insight into the acceleration mechanism of cosmic ray sources: because neutrinos should be produced in hadronic interactions and are neither absorbed nor deflected so they point directly back to their sources. This talk will give a short overview of the field of neutrino astronomy, including a summary of recent results from the ANTARES...
Rikard Enberg
(Uppsala University)
18/07/2013, 09:30
Astroparticle Physics
Talk presentation
Atmospheric neutrinos 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 neutrino 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...
Ugo Giaccari
(Universidade Federal do Rio De Janeiro)
18/07/2013, 09:45
Astroparticle Physics
Talk presentation
We report recent results of the distribution of the arrival directions of ultra high energy cosmic rays recorded by the surface detector array of the Pierre Auger Observatory.
We discuss the search for large scale anisotropies expressed in terms of dipolar and quadrupolar coefficients as a function of the right ascension and declination at the EeV energy scale.
For cosmic rays at highest...
Annarita Margiotta
(Universita e INFN (IT))
18/07/2013, 10:00
Astroparticle Physics
Talk presentation
More than one hundred years after the first observations of cosmic rays, problems connected with their origin and propagation have not been completely solved.
Astrophysical objects such as Supernova Remnants, Active Galactic Nuclei, Quasars and Microquasars, which are likely sources of high energy cosmic rays and gamma rays, could emit high energy neutrinos as well. The detection and the...
Stefan Westerhoff
(University of Wisconsin-Madison)
18/07/2013, 10:15
Astroparticle Physics
Talk presentation
The High-Altitude Water Cherenkov Gamma-Ray Observatory (HAWC) is currently under construction 4,100 meters above sea level on the slope of Pico de Orizaba, Mexico. HAWC is a large field-of-view instrument capable of continuously monitoring the gamma-ray sky between roughly 50 GeV and 100 TeV. The detector will be used to record both steady and transient gamma-ray sources and to provide an...
Brandon Anderson
(U)
18/07/2013, 11:00
Astroparticle Physics
Talk presentation
The nature of dark matter (DM) remains obscure. On Earth, we have been unable to observe its production at high-energy facilities, and direct, matter-interaction signals are tentative at best. There are regions of the galaxy, however, where the DM density is expected to be many times greater than the local value. Weak self-interaction in such places that produces photons could be observable...
Matthias Danninger
18/07/2013, 11:30
Astroparticle Physics
Talk presentation
The cubic-kilometer sized IceCube neutrino observatory, constructed in the glacial ice at the South Pole, offers new opportunities for neutrino physics with its in-fill array "DeepCore". IceCube searches indirectly for dark matter via neutrinos from dark matter self-annihilations and has a high discovery potential through striking signatures. We report on the latest results from searches for...
Jelena Aleksic
(IFAE)
18/07/2013, 11:45
Astroparticle Physics
Talk presentation
Discovering the nature of dark matter is one of the most exciting tasks of modern science. Among the targets suitable for dark matter searches, dwarf spheroidal galaxies are considered to be excellent candidates and, among them, Segue 1 stands out with mass-to-light ratio estimated to order of 1000. We present the results of the first stereoscopic observations of Segue 1 with MAGIC Telescopes,...
Dorota Sokolowska
(University of Warsaw)
18/07/2013, 12:00
Astroparticle Physics
Talk presentation
We consider a scalar Dark Matter candidate from the Inert Doublet Model in the light of the discovery of the 125 GeV SM-like Higgs boson at LHC.
Using the relic density constraints we explore potential of LHC to determine the properties of the Dark Matter particles independently on the direct and indirect DM detection experiments.
Talk based on arXiv:1303.7102, 1212.4100, 1209.5725 and...
Pat Scott
(McGill University)
18/07/2013, 12:15
Astroparticle Physics
Talk presentation
A deal of recent effort has gone into creating generic astroparticle likelihood functions that can be directly included in global fits to Beyond the Standard Model (BSM) theories. I will detail new generalised constraints from the cosmic microwave background on dark matter annihilation into any combination of SM particles, and discuss methods for including event-level data from neutrino...
Osamu Seto
18/07/2013, 12:30
Astroparticle Physics
Talk presentation
We propose a model for vector dark matter with an extra U(1) gauge symmetry broken by the VEV of a complex singlet scalar. Due to the mixing between the singlet scalar and the Standard Model Higgs doublet, the relic density of vector dark matter can be consisitent. The model may contain a charged scalar. the annihilation of vector dark matter into two photons can be sizable enough to account...
Guey-Lin Lin
(National Chiao-Tung University)
18/07/2013, 12:45
Astroparticle Physics
Talk presentation
We study the sensitivity of IceCube/DeepCore detector to dark matter (DM) annihilations in the Earth core. We focus on annihilation modes DM DM-->nu anti-nu, tau^+ tau^-, b anti-b, and W^+W^-. Both track and cascade events are considered in our analysis.
By fixing the DM annihilation cross section at some nominal values, we study the sensitivity of IceCube/DeepCore detector to DM...
Jean-Côme Lanfranchi
(T)
18/07/2013, 14:30
Astroparticle Physics
Talk presentation
Latest results from precision measurements of the cosmic microwave background (CMB) indicate that about a quarter of the Universe consists of Dark Matter (DM). Well motivated particle candidates to account for DM are Weakly Interacting Massive Particles (WIMPs) which should be directly detectable in ultra-low background experiments on Earth. After a brief introduction to the field of Dark...
Ms
Annika Behrens
(University of Zurich)
18/07/2013, 15:00
Astroparticle Physics
Talk presentation
The XENON100 experiment is a direct dark matter search experiment using a dual-phase xenon time projection chamber situated at the Laborati Nazionali de Gran Sasso (LNGS) underground laboratory. Due to its ultra-low background level it has been able to set the most stringent excluding level for the cross-section of scattering of weakly interacting massive particles (WIMPs) off nucleons.
In...
Kristjan Kannike
(Nat. Inst. of Chem.Phys. & Biophys. (EE))
18/07/2013, 15:15
Astroparticle Physics
Talk presentation
Scalar dark matter models invariant under a discrete Z_3 or Z_4 symmetry are studied. Unlike in the usual Z_2 case, their phenomenology can contain semi-annihilations -- processes in which two dark sector particles scatter into a dark sector and a SM particle. The simplest such model has complex scalar singlet DM stabilised by Z_3. Compared to the well-known Z_2 case, the new processes can...
Mr
Theopisti Dafni
(Universidad de Zaragoza (ES))
18/07/2013, 15:30
Astroparticle Physics
Talk presentation
The status of the solar axion search with the CERN Axion Solar Telescope (CAST) will be discussed. Recent results from the second part of CAST phase II where the magnet bores were filled with 3He gas at variable pressure achieving sensibilities on the axion mass up to 1.2 eV will be presented. In the next two years CAST is expecting to improve sensitivity to solar axions with rest mass below...
Manuel Meyer
(University of Hamburg)
18/07/2013, 15:45
Astroparticle Physics
Talk presentation
Very high energy (VHE) gamma-rays undergo pair production
with low energy photons of background radiation fields.
This leads to an attenuation of the primary gamma-ray flux of extragalactic sources
in the interaction with the extragalactic background light
which stretches from ultraviolet to far-infrared wavelengths.
In the presence of magnetic fields, gamma-rays could oscillate into...
Melanie Heil
(KIT - Karlsruhe Institute of Technology (DE))
18/07/2013, 16:30
Astroparticle Physics
Talk presentation
The Alpha Magnetic Spectrometer (AMS-02) is a state of the art particle detector, measuring the cosmic rays on the International Space Station (ISS) since May 19th 2011.
AMS-02 measures all the compounds of cosmic rays up to iron in an energy range from MeV to TeV. The seven subsystems of the detector allow for redundant particle identification with unprecedented accuracy.
With its proton...
Sofia Andringa Dias
(LIP Laboratorio de Instrumentaco e Fisica Experimental de Particulas)
18/07/2013, 17:00
Astroparticle Physics
Talk presentation
The Pierre Auger Observatory measures cosmic rays with energies between 10^17.5 eV and 10^20 eV, based on air shower sampling at ground, complemented with shower development measurements with a smaller 12% duty-cycle.
The cross-section for the primary interaction of 10^18 eV protons with air has been measured by analysing the maximum of shower development in the atmosphere. This...
Ioana Maris
18/07/2013, 17:15
Astroparticle Physics
Talk presentation
We report the measurement of the flux of cosmic rays with unprecedented precision and statistics using data collected at the Pierre Auger Observatory until 31 December 2012. The fluorescence observation of the air-showers provide intrinsically a calorimetric energy measurement. Based on the hybrid nature of the experiment, the energy scale for the surface detector is obtained with minimal...
Alessia Tricomi
(Universita e INFN (IT))
18/07/2013, 17:30
Astroparticle Physics
Talk presentation
The LHCf experiment has been installed at +/- 140 m from the Atlas LHC interaction region, to precisely measure the
neutral particle energy spectra (mainly photons, neutral pions and neutrons) produced very forward in the LHC collisions.
The experiment has successfully taken data both in p-p collisions (at 900 GeV, 2.76 TeV, and 7 TeV center of mass energy)
and in the p-Pb collisions at...
Andreas Haungs
(Karlsruhe Institute of Technology)
18/07/2013, 17:45
Astroparticle Physics
Talk presentation
With KASCADE-Grande, the detection of high-energy cosmic rays above a few hundred TeV is realized by the observation of extensive air-showers. By using a multi-detector setup, energy spectrum, elemental composition, and anisotropies of high-energy cosmic rays in the energy range from below the knee up to 2 EeV are investigated. In addition, the large high-quality data set permits distinct...
Dr
Paolo Camarri
(University of Roma "Tor Vergata")
18/07/2013, 18:00
Astroparticle Physics
Talk presentation
The ARGO-YBJ experiment, located in the Tibet region of China at 4300 meters a.s.l., has run uninterruptedly for over 5 years, namely from November 2007 till the beginning of 2013. It was designed to study astronomical gamma-ray sources in the energy range from a few hundred GeV up to about 100 TeV, and cosmic-ray physics in the energy range from about 1 TeV up to few PeV. The full-coverage...
Ho-Chin Tsai
18/07/2013, 18:15
Astroparticle Physics
Talk presentation
We take into account a generic form of a Dirac fermionic dark matter (DM), which communicates with the Standard Model quarks via a scalar mediator, in a model-independent way. Four special interaction scenarios are investigated, where one is parity conserving and the other three are parity violating. Three of them result in the v suppressed DM-nucleon cross sections, where v ~10^-3c is the...
