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Christoph Renner (Université de Genève), Eckhard Elsen (CERN)12/09/2016, 09:20Invited Contributions
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Margherita Primavera (Univ. + INFN), Margherita Primavera (Universita del Salento (IT))12/09/2016, 09:50
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Francesco Costanza (Deutsches Elektronen-Synchrotron (DE))12/09/2016, 10:10
With the increase in center-of-mass energy, a new energy frontier has been opened by the Large Hadron Collider. More than 25 fb^-1 of proton-proton collisions at sqrt(s)=13 TeV have been delivered to both ATLAS and CMS experiments during 2016. This enormous dataset can be used to test the Standard Model in a complete new regime with tremendous precision and it has the potential to unveil new...
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Ulrich Andreas Haisch (University of Oxford (GB))12/09/2016, 11:00
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Marc Schumann (University of Bern)12/09/2016, 11:30
There is overwhelming indirect evidence that dark matter exists, however, the dark matter particle has not yet been directly detected in laboratory experiments. In order to be able to identify the rare dark matter interactions with the target nuclei, such instruments have to feature a very low threshold and an extremely low radioactive background. They are therefore installed in underground...
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Igor Garcia Irastorza (Universidad de Zaragoza (ES))12/09/2016, 12:00
Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs are very well motivated candidates for the Dark Matter, and in addition would be copiously produced at the stellar cores....
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Iason Baldes12/09/2016, 14:00
I will discuss, in a model-independent way, how the nature of the electroweak phase transition is completely changed when the Standard Model Yukawas vary at the same time as the Higgs is acquiring its vacuum expectation value. (Large Yukawas before the electroweak phase transition also give an unsuppressed source of CP violation, see abstract/talk by Sebastian Bruggisser.) The thermal...
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Chang-Seong Moon (UNESP - Universidade Estadual Paulista (BR))12/09/2016, 14:00
DM searches using missing ET at LHC (CMS)
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Nicola Tomassetti (Perugia University & INFN- Perugia)12/09/2016, 14:00
We present a precision measurement of the cosmic-ray proton flux at rigidity from 1 GV to 1.8 TV and the helium flux at rigidity from 2 GV to 3 TV. The measurement is based on the data collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. The two fluxes are found to progressively harden at rigidities larger than 100 GV, while the proton-to-helium ratio is...
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Jürgen Knödlseder12/09/2016, 14:00
The field of gamma-ray astronomy has experienced impressive progress over the last decade. Thanks to the advent of a new generation of imaging air Cherenkov telescopes (H.E.S.S., MAGIC, VERITAS) and thanks to the launch of the Fermi-LAT satellite, several thousand gamma-ray sources are known today, revealing an unexpected ubiquity of particle acceleration processes in the Universe. Major...
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Sebastian Bruggisser (DESY Theory-Group)12/09/2016, 14:20
Varying Yukawas open new possibilities for electroweak baryogenesis. In this talk I will focus on the CP-violation and the baryon-asymmetry (for details on the strength of the phase transition, see abstract by Iason Baldes). Starting from first principles, I will derive the general form of the CP-violating semiclassical force and the diffusion equations for models with varying Yukawa...
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Nikolas Zimmermann (Rheinisch-Westfaelische Tech. Hoch. (DE))12/09/2016, 14:20
Precision measurements by the Alpha Magnetic Spectrometer on the International Space Station of the primary cosmic-ray electron flux in the range 0.5 to 700 GeV and the positron flux in the range 0.5 to 500 GeV are presented. The electron flux and the positron flux each require a description beyond a single power-law spectrum. Both the electron flux and the positron flux change their behavior...
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Rachel Christine Rosten (University of Washington (US))12/09/2016, 14:20
Searches for light dark matter through dijets and long-lived particles at the LHC
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John Tomsick (University of California, Berkeley), John Tomsick12/09/2016, 14:30
The Compton Spectrometer and Imager (COSI) is a balloon-borne, gamma ray imager, spectrometer, and polarimeter with sensitivity from 0.2 to 5 MeV. Utilizing a compact Compton telescope design with twelve cross-strip, high-purity germanium detectors, COSI has three main science goals: study the 511 keV positron annihilation line from the galactic plane, image diffuse emission from stellar...
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Andreas Bachlechner (Rheinisch-Westfaelische Tech. Hoch. (DE))12/09/2016, 14:40
A precision measurement by AMS of the antiproton flux and
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the antiproton-to-proton flux ratio in primary cosmic rays in the
absolute rigidity range from 1 to 450 GV is presented based on $3.49 \times 10^5$ antiproton events and $2.42 \times 10^9$ proton events. The
antiproton-to-proton flux ratio reaches a maximum at ∼20 GV and is
rigidity independent above 60.3 GV. -
Mr Bryan Zaldivar (LAPTh, Annecy)12/09/2016, 14:40
It has been recently shown that if dark matter is produced at the LHC via spin-0 mediators, multijet+MET searches are more sensitive than the standard monojet ones. We have recast the latest multijet+MET analysis using 13 TeV data, to show the present and future prospects of exclusion power of this signal. We apply these constraints to several DM well motivated models, including the...
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Frank Deppisch (University College London (UK))12/09/2016, 14:40
Interactions that manifest themselves as lepton number violating processes at low energies in combination with sphaleron transitions typically erase any pre-existing baryon asymmetry of the Universe. We demonstrate in a model independent approach that the observation of lepton number violation, namely in neutrinoless double beta decay and at the LHC, would impose a stringent constraint on...
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Sebastian Liem (GRAPPA, University of Amsterdam)12/09/2016, 15:00
Expensive detector simulations are in general required to assess the implications of LHC data on extensions of the Standard Model of particle physics, as they allow to directly compare the predicted phenomenology for a given point in (an often high-dimensional) theory parameter space, with actual data. We show here that a suitable application of advanced machine learning methods that can...
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Philippe Gros (Centre National de la Recherche Scientifique (FR))12/09/2016, 15:00
I will first describe the experimental setup with which we took data at different photon energies from 1.7MeV to 74MeV, and with different polarisation configurations.
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I will present the software I developed to reconstruct the photon conversion events, especially for low energies.
I will also introduce the complete detailed simulation I made of the detector.
Finally I will present the... -
Michael Korsmeier (RWTH Aachen University)12/09/2016, 15:00
Astroparticle physics of Galactic cosmic rays (CR) has entered a new level of precision with the measurements of AMS-02. On the other hand, uncertainties in CR production in the sources and in their propagation are still large. We thus perform a global analysis of injection and propagation parameters testing how the current diffusion models perform in the light of the new precise data. Using...
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Dr Daniele Teresi (Université Libre de Bruxelles)12/09/2016, 15:00
In this talk I will start by considering a question which curiously had not been properly considered so far: in the standard seesaw model what is the minimum value the mass of a right-handed (RH) neutrino must have for allowing successful leptogenesis via CP-violating decays? I show that, for low RH neutrino masses and thanks to thermal effects, leptogenesis turns out to proceed efficiently...
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Sergio Bruno Ricciarini (Universita e INFN, Firenze (IT))12/09/2016, 15:15
The CALET Gamma-ray Burst Monitor (CGBM) is the secondary scientific instrument of the CALET mission on the International Space Station (ISS), which was successfully launched and attached to the International Space Station (ISS) at the end of August 2015 and began scientific operations in October 2015.
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The CGBM consists of two LaBr3(Ce) and one BGO scintillators, each read by a single... -
Mikhail Ivanov (Ecole Polytechnique Federale de Lausanne (CH))12/09/2016, 15:20
One of the possible sources of hadronic cosmic rays (CRs) are newborn pulsars. If it is indeed the case, they should feature diffusive gamma-ray halos produced by interactions of CRs with interstellar gas. In my talk I will report on the attempts to identify extended gamma-ray emission around young pulsars making use of the 7-year Fermi-LAT data.
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I will describe the method and the selected... -
Mr Juraj Klaric (Technische Universität München)12/09/2016, 15:20
The extension of the Standard Model by heavy right-handed neutrinos can simultaneously explain the observed neutrino masses via the seesaw mechanism and the baryon asymmetry of the Universe via leptogenesis. If the mass of the heavy neutrinos is below the electroweak scale, they may be found at LHCb, BELLE II, the proposed SHiP experiment or a future high-energy collider. In this mass range,...
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Abhaya Kumar Swain (Physical Research Laboratory)12/09/2016, 15:20
After the monumental discovery of the Higgs boson, the LHC presently confronts the major challenge in searching for new physics. Any such observation necessitates the determination of mass and other quantum numbers like spin, polarization etc for the new resonance. Most of the BSM theories motivated from profound experimental indication of dark matter (DM), trying to accommodate them as some...
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Thomas Weisgarber (University of Wisconsin--Madison)12/09/2016, 15:30
The High Altitude Water Cherenkov (HAWC) Observatory has been fully operational since its inauguration on 20 March 2015. HAWC opens a new window for survey observations of gamma rays and cosmic rays in the very high energy (VHE) range from 100 GeV to 100 TeV, facilitating studies of Galactic and extragalactic particle accelerators, indirect dark matter searches, gamma-ray bursts, and many...
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Enrico Nardi12/09/2016, 15:40
- Present circumstantial evidences that seem to favour a scenario of baryogenesis via
leptogenesis from heavy particle decays - New experimental results that could further support this picture in the next future
- Difficulties for going beyond the level of "circumstantial evidences in favour...".
General no-go arguments forbidding leptogenesis scales sufficiently low to be directly
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- Present circumstantial evidences that seem to favour a scenario of baryogenesis via
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Dr Benjamin Farmer (Oskar Klein Centre)12/09/2016, 15:40
As above
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mattia di mauro (Stanford University)12/09/2016, 15:40
We present a combined analysis of the recent AMS-02 data on electrons, positrons, electrons plus positrons and positron fraction. We consider a self-consistent framework where we realize a theoretical modeling of all the astrophysical components that can contribute to the observed fluxes. The primary electron contribution is modeled through a smooth spatial distribution of distant supernova...
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Koji Ichikawa (Kavli IPMU)12/09/2016, 16:30
One of the most promising way to detect dark matter is to look for its annihilation or decay products among cosmic-rays. Especially, it is found that quite strong constraints can be imposed by the gamma-ray measurements of dwarf spheroidal galaxies. However, recent studies reveal that these constraints are largely affected by the uncertainty of the dark matter halo density. In this talk, we...
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David Jason Koskinen (University of Copenhagen)12/09/2016, 16:30
The Precision IceCube Next Generation Upgrade (PINGU) is a proposed low-energy in-fill extension to the IceCube Neutrino Observatory that will feature the world's largest effective mass of a few MTon for neutrinos at an energy threshold of a few GeV. The unprecedented statistical sample of GeV-scale atmospheric neutrinos will enable PINGU to quickly and at a modest cost investigate the...
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Prof. Jianglai Liu (Shanghai Jiao Tong University)12/09/2016, 16:30
The particle physics nature of the dark matter is one the top unknowns in physics. The Particle and Astrophysical Xenon (PandaX) project is a series of xenon-based experiments in the China Jin-Ping Underground Laboratory (CJPL). The first and second stage experiments (PandaX-I and II) both utilize dual-phase xenon time-projection chamber to carry out direct search for the dark matter...
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Dr Alberto Dominguez (Universidad Complutense de Madrid)12/09/2016, 16:30
We present the new Third Catalog of Hard Fermi-LAT Sources, dubbed 3FHL, which describes the sky at energies above 10 GeV. Relying on 7 years of data and the Pass 8 event level analysis, this catalog reports the detection of more than 1700 sources, representing a huge step forward relative to the 1FHL, which characterizes the sky at the same energies. The improved flux sensitivity (factor of...
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Mr Andrea Chiappo (Oskar Klein Center, Department of Physics, Stockholm University)12/09/2016, 16:50
We use the Maximum Likelihood technique to derive the density profile parameters of the the dark matter halos containing the Dwarf Spheroidal Galaxies of the Milky Way. This is done using the Jeans equation formalism on the the stellar kinematic data available for such systems. The method is validated on simulated data generated by the Gaia Challenge team.
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Prof. Jan Conrad (Stokcholm University)12/09/2016, 16:50
The XENON program aims at direct detection of Weakly Interacting Massive Particles (WIMPs) detection with dual phase xenon time projection chambers (TPCs), located at the Laboratori Nazionale de Gran Sasso. This contribution is going to review recent results of the still operational XENON-100 detector, as well as discuss the status and prospects for the presently commissioned XENON-1T...
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Jordan Hanson (The Ohio State University)12/09/2016, 16:50
The observation of EeV astrophysical neutrinos will be a significant scientific achievement, and the radio-frequency Antarctic neutrino observatories represent the cutting edge in the field of high-energy neutrino science. Being electrically neutral, astrophysical neutrinos propagate directly from the highest-energy objects in the cosmos, and could reveal the source of the highest energy...
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Vaidehi Paliya (Clemson University)12/09/2016, 17:00
A broadband study of high-z (z>3) blazars enables us to understand the evolution of the properties of relativistic jets over cosmic time. Moreover, it has been found in many studies that such high-z blazars host extremely massive black holes (M$_{BH}$> 1e9 M$_{\odot}$) and thus shed a new light on the formation of supermassive black holes in the early Universe. Here we report the first...
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Mattia Fornasa (GRAPPA Institute (University of Amsterdam))12/09/2016, 17:10
The Diffuse Gamma-Ray Background (DGRB) collects the radiation produced by all those sources that are not bright enough to be resolved individually. Therefore, it represents an essential tool to study faint gamma-ray emitters, like star-forming or radio galaxies and the exotic Dark Matter. The anisotropy pattern of the DGRB is extremely informative: I will review the recent measurement of the...
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Prof. Alex Murphy (Edinburgh)12/09/2016, 17:10
A brief introduction to two-phase xenon TPCs, the details of the LUX project, illustration of how signals are reconstructed, details of calibrations, analysis and background estimates, and presentation of the most recent results
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Javier Barrios Martí (IFIC (CSIC-UV))12/09/2016, 17:10
The KM3NeT Collaboration aims at the discovery and subsequent observation of high neutrino sources in the Universe (ARCA) and at the determination of the neutrino mass hierarchy (ORCA). The KM3NeT technologies, current status and expected performances are reported. In particular the ARCA detector is described and its perspectives for detection of high energy neutrinos signals from different...
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David Paneque (Max Planck Institute for Physics, Munich)12/09/2016, 17:15
The blazars Mrk421 and Mrk501 are among the brightest keV and TeV sources in the sky, and among the few sources whose (radio to VHE gamma-rays) Spectral Energy Distributions (SEDs) can be characterized by current instruments by means of relatively short observations (minutes to hours). Consequently, Mrk421 and Mrk501 can be studied with a larger degree of accuracy than most of the other...
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Fabrice Retiere (TRIUMF)12/09/2016, 17:30
DEAP-3600 is a liquid Argon detector with competitive sensitivity to dark matter interaction especially at high mass (above 100 GeV/c2). The detector is currently 25% full of liquid Argon and filling is expected to be completed in July 2016. When full, DEAP-3600 will hold 3600kg of liquid Argon within an acrylic sphere surrounded by 255 photo-multiplier tubes. Only the scintillation light is...
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Arti Goyal (AO-JU)12/09/2016, 17:30
The main results from our analysis are :
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(1) nature of processes generating
flux variability at optical/radio frequencies is different from
those at GeV freqeuncies ($\beta \sim $ 2 and 1, respectively); this could
imply, that $\gamma-$ray variability, unlike the Synchrotron (radio-to-optical) one,
is generated by superposition of two stochastic processes with different
relaxation... -
Marco Regis (INFN - National Institute for Nuclear Physics)12/09/2016, 17:30
Anisotropies in the electromagnetic emission produced by dark matter (DM) annihilation
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or decay in the extragalactic sky are a recent tool in the quest for a particle DM evidence.
In particular, the angular two-point cross-correlation signal between non-gravitational DM emissions and the gravitational manifestation of DM has been shown to be a promising novel technique to disentangle a WIMP... -
Dr Thierry PRADIER (IPHC)12/09/2016, 17:30
The ANTARES high energy neutrino telescope, the largest in the Northern Hemisphere and the first one ever built under the sea, has been running in its final configuration since 2008. It is located in the Mediterranean Sea 40 km off the Southern coast of France, at a depth of 2.5 km.
After the discovery of a cosmic neutrino diffuse flux by the IceCube detector, the search for its origin has...
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Julian Sitarek (University of Łódź)12/09/2016, 17:45
PKS1510-089 is a flat spectrum radio quasar with a redshift of 0.36 and is one of the few such sources detected in very-high-energy (VHE, >100 GeV) gamma rays. PKS1510-089 is highly variable at GeV energies, but until recently no variability in the VHE range has been observed.
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In 2015 May PKS1510-089 showed a high state in optical and in the GeV range. MAGIC observations performed at that... -
Dr Camilo Garcia-Cely (ULB)12/09/2016, 17:50
I will discuss a model-independent approach to calculate the spectra arising from dark matter annihilations or decays into intermediary particles with arbitrary spin, which subsequently produce neutrinos or photons via two-body decays. I illustrate this with two examples. First, with the neutrino spectra arising from dark matter annihilations into the massive Standard Model gauge bosons....
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Emilija Pantic (UC Davis)12/09/2016, 17:50
The DarkSide-50 experiment employs a dual-phase liquid argon time projection chamber inside a system of two active veto detectors to directly search for WIMP dark matter. DarkSide-50 has recently performed a background-free search using 70 live days of data with low radioactivity argon extracted from underground, setting the strongest limit to date on the WIMP-nucleon elastic cross section...
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Asen Christov (Universite de Geneve (CH))12/09/2016, 17:50
We performed a set of time dependent and multi-messenger searches for neutrino flaring emissions from astrophysical sources. We present the results of three searches applied to IceCube data measured between April 2008 and April 2015. The most generic search is an un-triggered scan for clustering of track like IceCube events simultaneously in both, time and direction. The second one is a...
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Wlodek Bednarek (University of Lodz)12/09/2016, 18:00
Massive black holes in active galaxies are surrounded by bulges of both evolved late type and also young luminous stars in nuclear stellar clusters. The luminous stars can enter a jet region which contain fast moving blobs filled with relativistic electrons. We calculate
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the gamma-ray spectra and light curves produced by these electrons in the Inverse Compton electron-positron pair cascade... -
Dr Atri Bhattacharya (University of Liege)12/09/2016, 18:10
We evaluate the prompt atmospheric neutrino flux at high energies using different QCD frameworks for calculating the heavy quark production cross section in collisions of cosmic ray protons and atmospheric nuclei. We use QCD parameters consistent with heavy quark production cross sections measured at fixed target experiments, such as RHIC and LHC, to deduce a band of uncertainty for charm and...
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Lina Necib (MIT)12/09/2016, 18:10
The morphology of dark matter annihilation/decay signals offers a handle for discrimination of dark matter against astrophysical backgrounds. Recent advances in N-body simulations allow us to map out the expected distribution of morphological parameters, rather than focusing on a small sample of halos which are assumed to be representative. In this talk, I will use data from the Illustris...
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Shin'ichiro Ando (University of Amsterdam)12/09/2016, 18:15
Angular power spectrum is getting more and more important in recent years to study components of the diffuse gamma-ray background. Understanding constituents through this and other measurements is extremely important for our generic knowledge on high-energy sky. If we are interested in searching for new physics such as dark matter annihilation, it is essential to address all possible...
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Alessandro Cuoco (RWTH Aachen TTK)12/09/2016, 18:30
will be based on
A.~Cuoco, J.~Q.~Xia, M.~Regis, E.~Branchini, N.~Fornengo and M.~Viel,
%``Dark Matter Searches in the Gamma-ray Extragalactic Background via Cross-correlations With Galaxy Catalogs,''
Astrophys.\ J.\ Suppl.\ {\bf 221} (2015) no.2, 29
doi:10.1088/0067-0049/221/2/29
[arXiv:1506.01030 [astro-ph.HE]]M.~Regis, J.~Q.~Xia, A.~Cuoco, E.~Branchini, N.~Fornengo...
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Prof. Justin Vandenbroucke (University of Wisconsin), Mr Vandenbroucke Justin (University of Wisconsin)12/09/2016, 18:30
Dwarf spheroidal galaxies are among the most important targets in the search for gamma rays from dark matter annihilation in the cosmos. In fact, joint likelihood analyses using dozens of dwarfs have recently reached the sensitivity necessary to test the putative dark matter signal detected from the Galactic center. While the gamma-ray flux from conventional astrophysical emission processes...
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Alain Blondel (Universite de Geneve (CH))12/09/2016, 18:30
Towards CP violation: from T2K to HyperK.
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Bruce Allen (Max Planck Society/Albert Einstein Institute Hannover)13/09/2016, 09:30
This talk follows announcements earlier this year by the LIGO and Virgo Scientific Collaborations, based on data from the first
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four-month observing run the advanced LIGO gravitational wave
detectors (aLIGO). In two instances, on 14.9.2015 and on 26.12.2015, we have directly detected the gravitational waves emitted by the final orbits and merger of massive black hole binary systems. I... -
Scott Hughes (Massachusetts Institute of Technology)13/09/2016, 10:00
In the past year, the LIGO-Virgo Collaboration announced the first secure detection of gravitational waves. This discovery heralds the beginning of gravitational wave astronomy: the use of gravitational waves as a tool for studying the dense and dynamical universe. In this talk, I will describe the full spectrum of gravitational waves, from Hubble-scale modes, through waves with periods of...
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Naoko Kurahashi (Drexel University)13/09/2016, 11:00
Abstract: IceCube's discovery of a diffuse flux of astrophysical neutrinos started a new era of neutrino astronomy.I will review the multiple diffuse analyses in IceCube that observe the astrophysical flux, and what each can tell us. Then I will focus on spatial analyses that aim to identify the sources of such astrophysical neutrinos. This will be followed by an attempt to reconcile all...
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Mark Vagins (Kavli IPMU/UTokyo)13/09/2016, 11:30
A core-collapse supernova is a nearly perfect neutrino bomb. While capable of outshining its entire host galaxy, this stunning light show represents just a small portion of the explosion. Indeed, each such cataclysmic event typically radiates two orders of magnitude more energy as low-energy neutrinos than it does as electromagnetic radiation or as kinetic shockwaves. Consequently, MeV-scale...
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Thomas Gaisser (Bartol Research Institute)13/09/2016, 12:00
The discovery of astrophysical neutrinos at high energy by IceCube raises a host of questions: What are the sources? Is there a Galactic as well as an extragalactic component? How does the astrophysical spectrum continue to lower energy where the dominant signal is from atmospheric neutrinos? Is there a measureable flux of cosmogenic neutrinos at higher energy? What is the connection to cosmic...
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Valentin Kozlov (KIT)13/09/2016, 14:00
EDELWEISS experiment performs direct dark matter search by means of Ge heat-and-ionization bolometers operated at 18 mK in the underground laboratory of Modane (LSM, France). The third phase of the experiment is accumulating data using an array of twenty-four 800-g detectors with improved resolution and rejection capabilities relative to EDELWEISS-II. The performance of these detectors and the...
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Matteo Martucci (Università di Roma Tor Vergata)13/09/2016, 14:00
Since June 2006 the PAMELA satellite-borne experiment has presented fundamental results on various aspects of cosmic-ray physics. Above all, PAMELA investigated the features present in the antiparticle component of galactic cosmic rays, which have been interpreted in terms of DM annihilation or pulsar contribution. The combination of a permanent magnet with a silicon-strip spectrometer and a...
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Daniel G. Figueroa (CERN)13/09/2016, 14:00
Under general circumstances, the Standard Model Higgs is excited in the form of a condensate during or towards the end of inflation. The Higgs condensate is then forced to decay afterwards — due to non-perturbative effects — into the rest of the SM species. I will present the cosmological implications of this primordial decay, quantifying the necessary conditions to achieve a successful...
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Diego Garcia-Gamez13/09/2016, 14:00
The global neutrino physics community is coming together to develop the Deep Underground Neutrino Experiment (DUNE). It is a groundbreaking science experiment for long-baseline neutrino oscillation studies and for neutrino astrophysics and nucleon decay searches. The facility required for DUNE, the Long-Baseline Neutrino Facility (LBNF), comprises an expansion of the underground infrastructure...
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Francesco Cefalà (University of Basel)13/09/2016, 14:20
We investigate the production of gravitational waves during the preheating process after inflation in the common case of field potentials that are asymmetric around the minimum where the universe reheats. In particular, we study the impact of oscillons, comparatively long lived and spatially localized regions where a scalar field (e.g. the inflaton) oscillates with large amplitude. Contrary to...
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Dr Alexandre Kozlov (Kavli IPMU)13/09/2016, 14:20
to be added
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Qi Yan (Massachusetts Inst. of Technology (US))13/09/2016, 14:20
The nuclei fluxes with rigidity and their ratios are important for understanding the production, acceleration and propagation mechanisms of cosmic rays. Latest result from the Alpha Magnetic Spectrometer on the International Space Station of the light nuclei measurement will be presented.
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Christian Strandhagen13/09/2016, 14:20
The CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) experiment, located in the Gran Sasso underground laboratory (LNGS) in Italy, searches for nuclear recoil events induced by the elastic scattering of dark matter particles in cryogenic detectors. The use of scintillating CaWO$_4$ crystals as absorbers allows the simultaneous measurement of a phonon and a light signal,...
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Manuela Vecchi (Universidade de Sao Paulo (BR))13/09/2016, 14:40
In view of the latest publications of the primary CR fluxes, namely proton and helium flux from AMS-02 and CREAM, we aim at re-evaluating the positron flux coming from conventional astrophysical processes, i. e. secondary positrons. Moreover, we plan to estimate how the experimental uncertainties on the primary CR fluxes affect the secondary positron flux, computed by means of a new...
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Dr Werner Maneschg (Max-Planck-Institut für Kernphysik)13/09/2016, 14:40
The search for neutrinoless double beta decay (0$\nu\beta\beta$) might be the only window to observe lepton number violation. Its observation would have many implications in neutrino physics (Majorana nature, mass scale and ordering, etc) and beyond.
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The GERmanium Detector Array (GERDA) experiment, located at the Laboratori Nazionali del Gran Sasso, has been constructed to search for this... -
Germano Nardini (DESY)13/09/2016, 14:40
Status of eLISA; Gravitational waves from first-order phase transitions; BSM physics with first-order phase transitions.
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Felix Kahlhoefer (DESY)13/09/2016, 14:40
The interpretation of dark matter direct detection experiments is complicated by the fact that neither the astrophysical distribution of dark matter nor the properties of its particle physics interactions with nuclei are known in detail. I will present a new framework that combines the full formalism of non-relativistic effective interactions with state-of-the-art halo-independent methods to...
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Jie Feng (Academia Sinica (TW))13/09/2016, 15:00
I will present the results of the scan of the parameter space for cosmic ray (CR) injection and propagation of Two-Halo-Model (THM). A Bayesian analysis is performed with Markov Chain Monte Carlo algorithm (MCMC). In THM, the propagation halo is divided into two different regions along the z-axis: inner and outer, where CRs will suffer from different propagation effects. We use proton and...
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Ciaran O'Hare (Nottingham), Ciaran O'Hare (Nottingham)13/09/2016, 15:00
The search for WIMP dark matter by direct detection faces an encroaching background due to coherent neutrino nucleus scattering. In this talk I will review the various types of neutrino that are backgrounds to direct detection - Solar, supernovae and atmospheric neutrinos - and explain how their presence results in the theoretical limit known as the neutrino floor. The proximity of the...
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David Weir (University of Stavanger)13/09/2016, 15:00
Gravitational waves are a promising new observational tool, not only for astrophysics but also for cosmology. In various extensions of the Standard Model the phase transition can be first order, and could produce copious gravitational waves from bubble collisions. Other possibilities, such as a tachyonic transition at the electroweak scale, produce a more subdued signature at higher...
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Marco Drewes (Technische Universitaet Muenchen (DE))13/09/2016, 15:00
based on 1502.00477
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Malcolm Fairbairn13/09/2016, 15:20
I will talk about ongoing research into aspects of the fact that the next generation of dark matter detectors will detect neutrinos. I will describe some of the physics which will be constrained using such detections and also new methods to both eliminate and study the neutrino background.
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yoann genolini (LAPTh)13/09/2016, 15:20
In the new “precision era” for cosmic ray astrophysics, theoretical predictions cannot content themselves with average trends,
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but need to correctly take into account intrinsic uncertainties. The space-time discreteness of the cosmic ray sources, joined with a
substantial ignorance of their precise epochs and locations (with the possible exception of the most recent and close ones) plays... -
Fa Peng Huang (IHEP)13/09/2016, 15:20
We report on the ?first joint analysis of observational signatures from the electroweak baryogenesis
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in both gravitational wave (GW) detectors and particle colliders to explore the nature of the electroweak phase transtion. Working with both the effective field theory and concrete models ,we show that a modified Higgs potential can keep the observed 125 GeV Higgs mass and produce a strong... -
Jacobo Lopez Pavon (INFN)13/09/2016, 15:20
We revisit the production of baryon asymmetries in the minimal type I seesaw model with heavy Majorana singlets in the GeV range. In particular we include for the first time "washout" effects from scattering processes with gauge bosons and higgs decays and inverse decays, besides the dominant top scatterings. We show that in the minimal model with two singlets, and for an inverted light...
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Johannes Herms (TUM)13/09/2016, 15:40
Antinuclei are a very promising discovery channel for exotic cosmic ray sources such as decaying or annihilating dark matter and evaporating primordial black holes. This talk will present an improved calculation of the antideuteron background including also collisions of primary cosmic rays in supernova remnants and will discuss the discovery potential for antideuterons in the light of present...
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Suchita Kulkarni (Austrian Academy of Sciences (AT))13/09/2016, 15:40
The direct detection experiments are reaching new limits in the upcoming searches. Among other things, they will be sensitive to the coherent neutrino scattering background. I will demonstrate the effect of new physics scenarios on the neutrino background at the direct detection experiments. I will further describe the impact on the dark matter constraints due to such a change in the neutrino...
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Chiara Caprini (CEA-Saclay)13/09/2016, 15:40
We investigate the capability of various configurations of the space interferometer eLISA to probe the late-time background expansion of the universe using gravitational wave standard sirens. We simulate catalogues of standard sirens composed by massive black hole binaries whose gravitational radiation is detectable by eLISA, and which are likely to produce an electromagnetic counterpart...
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Eric Baussan (Institut Pluridisciplinaire Hubert Curien (FR))13/09/2016, 15:40
Abstract
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The Jiangmen Underground Neutrino Observatory (JUNO) is a neu- trino reactor experiment at kt scale which will address the mass hierar- chy problem. The detector consists of a 20 kt Liquid Scintillator target and will be based in an deep underground laboratory (700 m) located at 53 km distance from the Yangjiang and Taishan nuclear power plant site in China. This specific location... -
Luigi Tibaldo (SLAC)13/09/2016, 16:30
Review talk on the high-energy interstellar gamma-ray emission from the Milky Way
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Kumiko Kotera (Institut d'Astrophysique de Paris)13/09/2016, 16:30
Newborn pulsars and magnetars turn out to be very promising sources to accelerate cosmic rays up to high and ultrahigh energies, thanks to their rotational and magnetic energy reservoirs. Interestingly, most scenarios that involve hadronic acceleration in these objects should lead to copious amount of neutrino production. Indeed, pulsars and magnetars are not born naked, but surrounded by a...
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Holger Martin Motz (Waseda University)13/09/2016, 16:30
The ISS-based CALET (Calorimetric Electron Telescope) detector is directly measuring the energy spectrum of electron+positron cosmic rays up to 20 TeV with an expected energy resolution of 2%. With an estimated proton rejection capability of 1 : 10$^5$ and an aperture of approximately 1200 cm$^2$ sr, it will provide good statistics even well above one TeV. This precise spectrum is going to be...
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Collaboration SHIP (CERN), Mario Campanelli (University College London (UK))13/09/2016, 16:30
SHIP is a new general purpose fixed target facility, whose Technical Proposal has been recently reviewed by the CERN SPS Committee and by the CERN Research Board. The two boards recommended that the experiment proceeds further to a Comprehensive Design phase in the context of the new CERN Working group "Physics Beyond Colliders", aiming at presenting a CERN strategy for the European Strategy...
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Wei Xue (MIT)13/09/2016, 16:50
Dark photons appear in many well-motivated dark matter scenarios, which
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leads to a worldwide effort to search for them. In this talk, I will present
two novel search methods for dark photons at the LHCb experiment. One is an exclusive
search in charm meson decay, and the other is a fully data-driven
inclusive search based on di-muon resonances. These searches advance particle physics... -
Keith Bechtol (University of Wisconsin-Madison)13/09/2016, 16:50
The cumulative emission resulting from hadronic cosmic-ray interactions in star-forming galaxies (SFGs) has been proposed as the dominant contribution to the astrophysical neutrino flux at TeV to PeV energies reported by IceCube.
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The same particle interactions also inevitably create gamma-ray emission that could be detectable as a component of the extragalactic gamma-ray background (EGB),... -
Mathieu Boudaud (LAPTh Annecy France)13/09/2016, 16:50
We developed a new semi-analytical method to better estimate the propagated cosmic-ray positron flux from a few hundreds MeV to 1 TeV.
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It allows us to take into account Galactic convection, energy losses inside the disc and diffusive reacceleration, that are often neglected or badly considered
as most of the analyses concentrate on energies above 10 GeV.
Therefore, we are now able to... -
Fabio Zandanel (University of Amsterdam)13/09/2016, 17:00
Despite several gamma-ray observational campaigns of clusters of galaxies in the last years, both by Fermi-LAT and Cherenkov telescopes, the diffuse high-energy emission that is expected to come from cosmic-ray hadronic interactions with the abundant ambient gas remains elusive. Nevertheless, we significantly improved our understanding of non-thermal phenomena in clusters. I will summarize the...
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P. Salati (Unite Reseaux du CNRS (FR))13/09/2016, 17:10
The antiproton-to-proton ratio is about to be published by the AMS collaboration. Any excess with respect to the astrophysical background could potentially be the eagerly awaited signal for the presence of WIMPs inside the Milky Way. These massive and weakly interacting species are natural candidates for the astronomical dark matter. Pervading the Galaxy, they are expected to pair-annihilate...
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NICHOLAS BENJAMIN SENNO (Penn State)13/09/2016, 17:10
The Antarctic neutrino observatory IceCube (IC) has detected a robust diffuse flux signal consistent with neutrinos of extragalactic origin. To date, none of the observed neutrinos have been associated with point sources or transient events. New analyses by the IC and Fermi collaborations have introduced tension between electromagnetic measurements and the gamma-ray signal theorized to...
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Prof. Diego Restrepo (Universidad de Antioquia)13/09/2016, 17:10
We analyze the present bounds of a scotogenic model, the Radiative Type III Seesaw (RSIII), in which an additional scalar doublet and at least two fermion triplets of $SU(2)_L$ are added to the Standard Model (SM). In the RSIII the new physics (NP) sector is odd under an exact global $Z_2$ symmetry. This symmetry guaranties that the lightest NP neutral particle is stable, providing a natural...
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Philip Von Doetinchem (University of Hawaii at Manoa)13/09/2016, 17:30
The GAPS experiment is foreseen to carry out a dark matter search by hunting for low-energy cosmic-ray antideuterons with a novel detection approach. The theoretically predicted antideuteron flux resulting from secondary interactions of primary cosmic rays, e.g. protons, with the interstellar medium is very low. So far not a single cosmic antideuteron has been detected by any experiment, but...
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Mauricio Bustamante (Ohio State University)13/09/2016, 17:30
Gamma-ray bursts (GRBs) are potential sources of high-energy (> 100 TeV) neutrinos and ultra-high-energy (> 10^9 GeV) cosmic rays (UHECRs). Recent neutrino searches have constrained the connection between them in the one-zone version of the internal shock model. It calculates the prompt particle emission from a single representative collision of plasma shells in the GRB jet, assuming that the...
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Dr Hannes Zechlin (University of Torino and INFN)13/09/2016, 17:30
Statistical properties of photon count maps have recently been proven to provide a sensitive observable for characterizing gamma-ray source populations and for measuring the composition of the gamma-ray sky with high accuracy. In this contribution, we generalize the use of the standard 1-point probability distribution function (1pPDF) to decompose the high-latitude gamma-ray emission observed...
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Michael Baker (JGU Mainz)13/09/2016, 17:30
We present a classification of simplified models of coannihilating dark matter. Assuming tree-level and renormalizable interactions we construct all possible simplified models (containing dark matter, its coannihilation partner and a mediator) which respect gauge and Lorentz invariance. We go on to identify the possible LHC signatures associated with these models and identify new search...
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Siddharth Mishra Sharma (Princeton University)13/09/2016, 17:45
In this talk, I will present an analysis of the extragalactic gamma-ray background (EGB) using data from the Fermi Large Area Telescope. The method takes advantage of photon-count statistics to determine the properties of resolved and unresolved gamma-ray sources that contribute to the EGB. I will present the source-count functions, as a function of energy, from 1.89 GeV to 2 TeV, as well as...
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Enrico Morgante (University of Geneva)13/09/2016, 17:50
I analyze the constraints on Dark Matter from direct and indirect detection and from the LHC in the case in which the interaction between the DM particle and the SM ones is spin-dependent. This can happen for example if the DM is a Majorana fermion and the interaction is mediated by a heavy Z’, or in the case in which the mediator is a pseudo-scalar (having in mind the possible 750 GeV...
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Are Raklev (University of Oslo (NO))13/09/2016, 17:50
Antideuterons are a potential messenger for dark matter annihilation or decay in our own galaxy, with very low backgrounds expected from astrophysical processes. The standard coalescence model of antideuteron formation, while simple to implement, has potentially large uncertainties from Monte Carlo modelling, and is under considerable strain by recent data from the LHC. We suggest two new...
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Dr Maria Petropoulou (Purdue University)13/09/2016, 17:50
Blazars are prime candidate sources for the high energy neutrinos recently detected by IceCube. Being intrinsically variable sources at almost all wavelengths, an accurate modeling of their neutrino emission in both quiescent and flaring states is vital for the interpretation of observations by neutrino telescopes. I will summarize our results on the neutrino emission obtained by the...
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Matthew Wood13/09/2016, 18:00
We present a comprehensive search for angular extension in high-latitude gamma-ray sources detected by the Fermi Large Area Telescope (LAT). While the majority of high-latitude LAT sources are extragalactic blazars that appear point-like within the LAT angular resolution, there are several physics scenarios that predict the existence of populations of spatially extended sources. Gamma-ray...
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Nicholas Rodd (Massachusetts Institute of Technology)13/09/2016, 18:10
Difficulties in explaining the origin of the high energy neutrinos observed by Icecube using traditional astroparticle physics have motivated ideas this flux could in part be due to the decay of PeV scale dark matter. In such scenarios, the decay is necessarily associated with the production of gamma rays at much lower energies that can be observed by Fermi-LAT. This is true even for decays...
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Ryosuke Sato13/09/2016, 18:10
The Sommerfeld enhancement is an important effect to modify the dark matter annihilation cross section if the dark matter couples with a force mediator whose mass is much smaller than the dark matter mass. Usually, the cross section is estimated as a product of the leading order cross section and the enhancement factor, which is calculated by solving Schrodinger equation with long range...
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Ksenia Ptitsyna (INR Moscow, MSU Moscow, ISDC Geneve)13/09/2016, 18:15
We consider particle acceleration in the vacuum gaps in split-monopole magnetospheres of slow and maximally rotating black holes, embedded in the radiatively-inefficient accretion flow (RIAF) environment. The gap height is limited by the onset of gamma-gamma pair production on the infrared photons originating in the RIAF.
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We numerically calculate the acceleration and propagation of charged ... -
Julie McEnery (NASA)14/09/2016, 09:30
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Lukasz Stawarz (Jagiellonian University)14/09/2016, 10:00
During the last decades, various classes of radio-loud active galactic nuclei have been established as sources of high-energy radiation extending over a very broad range from soft gamma-rays (photon energies E~MeV) up to very-high-energy gamma-rays (E>100 GeV). These include blazars of different types, as well as young and evolved radio galaxies. The observed gamma-ray emission from such...
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Stefano Gabici14/09/2016, 11:00
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Christoph Weniger (University of Amsterdam)14/09/2016, 11:30
Many theoretical ideas for the particle nature of dark matter exist. The most popular models often predict that dark matter particles self-annihilate or decay, giving rise to potentially detectable signatures in astronomical observations. I will summarize the current status of searches for such signatures and critically reassess recent claims for dark matter signals. I will further provide...
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Frank Linde (Nikhef National institute for subatomic physics (NL))14/09/2016, 12:00
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Vivian Poulin (LAPTh, Annecy-le-vieux and RWTH, Aachen)14/09/2016, 14:00
It is well known that CMB is a very powerful tool to constraints Dark Matter decays, even if this decay happens in some invisible -so called "dark"- radiation.
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I would like to show that, in multi-component models, or more generally for non-trivial dark sector decoupled from standard model, CMB can constraints both lifetime and abundance of decaying dark matter into dark radiation (that could... -
Sara Algeri (Imperial College London)14/09/2016, 14:00
The firm establishment of gamma-ray sources of dark matter is often impeded by source confusion. Conventional astrophysical sources can mimic hypothetical dark matter sources, manifested in unidentified sources in the Fermi-LAT catalogues or in the GC excess. In statistical terms, the question of whether a sources is dark matter or conventional astrophsyics is an example of a non-standard ...
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Floyd Stecker (NASA)14/09/2016, 14:00
Our direct results on the IBL are consistent with those from complimentary \gray analyses using observations from the {\it Fermi}-LAT \gray space telescope and the H.E.S.S. air \v{C}erenkov telescope. Figure \ref{Ackermann} indicates how well our opacity results for $z = 1$ overlap with those obtained by the {\it Fermi} collaboration (Ackermann et al. 2012). Our results are also compatible...
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Sergio Hernandez Cadena14/09/2016, 14:00
The HAWC Observatory is able to perfom dark matter (DM) searches for annihilation or decay of TeV candidates. In the case of annihilation of DM particles, sub-structure enhancement in highly extended sources is important, and it is described through the astrophysical J factor. A related quantity is the boost factor, which quantifies how large the enhancement can be due to sub-structure effects...
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Claire Guépin (IAP), Kumiko Kotera (Institut d'Astrophysique de Paris)14/09/2016, 14:00
The new generation of powerful instruments are reaching sensitivities and temporal resolutions that will allow a multi-messengers detection of transient phenomena. In this study, we explore the parameter-space of flaring sources (in particular in terms of luminosity, time-variability or emission energy band) that would enable the detection of transient neutrino signatures. We consider...
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Dr Mirza Satriawan (Physics Department, Universitas Gadjah Mada)14/09/2016, 14:00
One of a promising asymmetric dark matter model is the mirror model, where the gauge group is doubled the standard model (SM) gauge group, i.e. SU(3)$_1$$\otimes$SU(3)$_2$ $\otimes$SU(2)$_L$$\otimes$SU(2)$_R$ $\otimes$U(1)$_{Y1}$$\otimes$U(1)$_{Y2}$, and the particles content consist of the ordinary (o) SM particles (plus the right handed neutrinos) and their parity mirror (m) partners. To...
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Oscar Cata14/09/2016, 14:00
In the framework of the Standard Model extended with a dark matter particle in curved spacetime, we investigate the impact of terms in the Lagrangian linear in the dark matter field and proportional to the Ricci scalar on the dark matter stability. We show that this non-minimal coupling induces decay even if the dark matter particle only has gravitational interactions, and that the decay...
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Valera Frolov (LIGO lab)14/09/2016, 14:00
A worldwide network of kilometer-scale laser interferometers will come into operation during the next several years. Future terrestrial and space-based detectors have also been planned. We investigate the use of gravitational-wave observatories as detectors of dark matter in the process of direct interaction of DM objects with detectors. We will present the prospects for a detection based on...
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Alba Fernandez Barral (Institut de Fisica d'Altes Energies (IFAE))14/09/2016, 14:00
Cygnus X-1 is the prototype black hole high-mass microquasar.
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As a persistent and bright X-ray source is considered an optimal candidate
to study the disk-jet coupling. It displays the typical soft and hard X-ray
spectral states of black hole binaries where the emission is dominated by
the thermal black body radiation and by non-thermal emission from the inner
part of the disk and the... -
Andrea Vittino (TU Munich)14/09/2016, 14:00
In this talk we introduce DRAGON2, the new version of the public
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software package designed to study Cosmic Ray (CR) propagation in the Galaxy. Our
aim is to illustrate the approach followed in the writing of the code and to
present its most important features. We describe the properties of the numerical
scheme that has been adopted to implement all the processes related to CR
transport... -
Mr Bryan Zaldivar (LAPTh, Annecy)14/09/2016, 14:00
We consider a natural extension of the Minimal Dark Matter scenario where Dirac and Majorana SU(2)_L multiplets couple together via the Higss. We classify and study in a systematic way all the few possible models consistent with the absence of Landau poles up to very high scale, including the results for Direct Detection, and the Sommerfeld-enhanced annihilation. We demonstrate that, at...
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PRAVATA MOHANTY (Tata Institute of Fundamental Research, Mumbai, India)14/09/2016, 14:00
Extensive air shower (EAS) arrays with muon identification capability are ideal
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to investigate diffuse $\gamma$-rays at multi-TeV energies. The GRAPES-3
experiment at Ooty in India is equipped with a dense array of 400 scintillator
detectors and a large area (560 m$^2$) tracking compact muon detector. It is
designed to investigate $\gamma$-rays and cosmic ray nuclear composition in... -
Alberto Salvio (CERN)14/09/2016, 14:00
In this talk I will describe the main effects due to Einstein's general relativity on the stability of the electroweak vacuum. A perturbative (weak gravity) expansion will be discussed.
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Martin Stref (Montpellier University)14/09/2016, 14:00
Local measurements of Galactic cosmic-ray antiprotons are known to provide constraints on the properties of annihilating cold dark matter (CDM). It is also known that CDM candidates generically lead to the structuring of matter on scales much smaller than typical galaxies. This clustering translates into a very large population of subhalos in galaxies, which induces an enhancement of the...
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Koji Ichikawa (Kavli-IPMU)14/09/2016, 14:00
We estimate the annihilation (J) factors of non-spherical dark halos in the Galactic dwarf spheroidal (dSph) galaxies.
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This is motivated by the fact that most of such estimations have so far treated the dSphs and their dark halos as spherical systems for simplicity, even though the luminous parts of dSphs as well as the shapes of dark halos predicted by cold dark matter simulations are not... -
Mr Deepak Tiwari (INO, Harish Chandra Research Institute)14/09/2016, 14:00
Weakly Interactive Massive Particles (WIMPs) are among the most favored Dark Matter candidates.
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As the Solar System moves through Dark Matter halo, the WIMPs may scatter on the nuclei in the
Sun/Earth, lose energy, and get trapped by their gravitational potentials. Their capture and subsequent
annihilations in the core of Sun/ Earth may subsequently give rise to neutrinos, through various... -
Damien TURPIN (IRAP)14/09/2016, 14:00
ANTARES is currently the largest neutrino telescope operating in the Northern Hemisphere, aiming at the detection of high-energy neutrinos from astrophysical sources. Such observations would provide important clues about the processes at work in those sources, and possibly help to understand the sources of very high-energy cosmic rays. In this context, Antares is developing several programs to...
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Koji Noda (Max-Planck-Institute for Physics)14/09/2016, 14:00
The MAGIC telescopes can potentially detect very-high-energy gamma-rays emitted by multi-messenger sources.
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One such interesting target that has been found recently, is astrophysical neutrino events.
Gamma-ray observations of neutrino directions have a potential to find hadronic gamma-ray emissions from the neutrino directions and to identify neutrino sources.
The IceCube Collaboration has... -
Dr Antonio Marinelli (INFN-Pisa)14/09/2016, 14:00
Our galactic plane is a diffuse heterogeneous emitter at high and very high energies. Several gamma-ray campaigns, like that of Fermi-LAT in the GeV range and H.E.S.S. and Milagro in the TeV range, reported an enhanced diffuse emission from different regions of the plane. With a comprensive cosmic-ray transport model, able to reproduce the observed gamma-ray spectra from the galactic plane, we...
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Michael Feyereisen (University of Amsterdam)14/09/2016, 14:00
We perform a spectral and anisotropic one-point-fluctuation analysis of high-energy Icecube data, based on data-driven modelling of both galactic and extragalactic contributions to the flux.
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Prof. Sergey Troitsky (Institute for Nuclear Research, Russian Academy of Sciences (RU))14/09/2016, 14:00
In baseline scenarios, energetic astrophysical neutrinos are produced in decays of charged pions, which in turn originate from proton-proton or proton-gamma collisions. Neutral-pion decays produce an accompanying gamma-ray flux, and observational data on gamma rays and cosmic rays impose serious constraints on scenarios explaining the origin of IceCube high-energy events. I review these...
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Prof. Sergey Troitsky (Institute for Nuclear Research, Russian Academy of Sciences (RU))14/09/2016, 14:00
New observational tests of anomalies in absorption of gamma rays from distant sources, which may point to existence of light axion-like particles, are discussed. Constraints on parameters of the would-be axion-like particle are presented and various scenarios are tested.
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Dr Shan Gao (DESY)14/09/2016, 14:00
Recently a potential correlation between the discovery of the IceCube PeV-neutrino event (IC 35) and the outburst phase of the blazar PKS B1424-418 has been reported. In this study, we simulate both the multi-wavelength photon and neutrino emission for this source using a self-consistent one-zone model. After a study on the parameter space we find that the simple hadronic model fails to...
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Jagdish Joshi (Raman Research Institute)14/09/2016, 14:00
Detection of ~ 0.1-70 GeV prompt gamma-ray emission from the exceptionally bright gamma-ray burst (GRB) 130427A by the Fermi-Large Area Telescope provides an opportunity to explore the physical processes of GeV gamma-ray emission from the GRB jets. In this work we discuss interactions of Iron and Oxygen nuclei with observed keV-MeV photons in the jet of GRB 130427A in order to explain an...
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Dr Moon Moon Devi (Weizmann Institute of Science, Israel)14/09/2016, 14:00
The current large area cosmic ray detector surface arrays typically measure only the net flux and arrival-time of the charged particles produced in an extensive air shower (EAS). Measurement of the individual charged particles at a surface array will provide additional distinguishing parameters to identify the primary and to map the very high energy interactions in the upper layers of the...
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Javier Barrios Martí (IFIC (CSIC-UV))14/09/2016, 14:00
The main aim of the ANTARES neutrino telescope is to detect neutrinos from astrophysical sources. Due to its location, ANTARES has a privileged visibility of the Galactic Centre, which provides the most stringent sensitivities for this region for neutrino energies below 100 TeV. The latest results of the all-flavour neutrino analysis for point and extended sources using data from 2007 to 2015...
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Mauricio Bustamante (Ohio State University)14/09/2016, 14:00
High-energy astrophysical neutrinos are a novel arena to test for the presence of new neutrino physics. With them, we can look for new physics at scales of tens of TeV to a few PeV, far beyond the reach of laboratory experiments. Even tiny modifications from new physics might accumulate over the presumed cosmological-scale baselines and become detectable. New physics models include, for...
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Chin-Hao Chen14/09/2016, 14:00
Detecting ultra-high energy neutrinos (UHECNs) with energies above 10^17eV, or the GZK neutrinos, is a fundamental problem in neutrino astronomy. By finding GZK neutrinos, not only the GZK process can be verified, but also provides valuable insights of the ultra-high energy cosmic rays.
When UHECNs interact with ice, radio signals at the frequencies of few hundreds of MHz will be generated...
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Mr Rodrigo Gracia Ruiz (A.P.C.)14/09/2016, 14:00
We use a two point correlation analysis to look for inhomogeneities in the arrival directions of the high energy muon neutrino candidates detected by the ANTARES neutrino telescope. This
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approach is complementary to a point source likelihood-based search, which is mainly sensitive
to single point like sources and not to collective effects. We present the results of a search
based on this... -
Ms Jhilik Majumdar (Institut für Experimentalphysik, University of Hamburg)14/09/2016, 14:00
Abstract : Axion-like particles (ALPs) as an extension of the standard model define a generic class of light pseudo-sclars with a rich phenomenology because of their coupling to photons. Here we explore a so-far neglected opportunity to search for ALPs-photon coupling in the disappearance channel, i.e. a characteristic energy dependent suppression of gamma-rays. To verify this phenomenon...
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Dr Elena Orlando (HEPL/KIPAC, Stanford University)14/09/2016, 14:00
We present the software StellarICs in development since 2013, year of the first release.
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Anatoli Fedynitch (DESY Zeuthen)14/09/2016, 14:00
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Niki Klop (GRAPPA, University of Amsterdam)14/09/2016, 14:00
Dwarf spheroidals (dSphs) are low-luminosity satellite galaxies of the Milky Way highly dominated by dark matter. Therefore, they are prime targets to search for signals from dark matter annihilation using gamma-ray observations. Recent stellar kinematical data show that the dark matter density profiles are better described by axisymmetric profiles than by the traditionally used spherically...
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Dr Martin Vollmann (TU Munich)14/09/2016, 14:00
One of the key predictions of the “WIMP” paradigm for Dark Matter (DM) is that DM particles can annihilate into charged particles. These annihilations will proceed in e.g. Galactic subhalos such as dwarf Galaxies or, as recently pointed out, high velocity clouds such as the “Smith” cloud. In this talk I will argue that among the several messengers of the DM annihilations occurring in the Smith...
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Dmitry Prokhorov (Linnaeus University)14/09/2016, 14:00
Cen A is the nearest radio-galaxy detected as a VHE gamma-ray source. Discovered by the H.E.S.S. telescopes in Namibia, Cen A is a faint VHE gamma-ray emitter, and the flux derived from the H.E.S.S. data is much higher than that expected from a single zone SSC model which adequately describes the emission from Cen A at lower frequencies. New observations with H.E.S.S. were performed to...
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Thomas Edwards (University of Amsterdam)14/09/2016, 14:00
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Prof. Daniele Fargion (Rome University 1 Sapienza and INFN)14/09/2016, 14:00
The presence of large scale TeVs anisotropy in Milagro, ARGO, ICECUBE
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and today Hawc sky remain a mistery: how may charged cosmic rays at tens
TeV remain correlated while being bent by local solar and galactic
magnetic fields in an expected smeared nearly homogeneous maps? We
considered UHECR as mostly light (or partial heavy) radioactive nuclei
whose decay in flight may feed by alfa and... -
Dr Marina Manganaro (IAC (Instituto de Astrofísica de Canarias))14/09/2016, 14:00
S5 0716+714 is a well known BL-Lac object, characterized by an extreme variability across the whole electromagnetic spectrum. The discovery in the Very High Energy band (VHE, E> 100 GeV) by MAGIC happened in 2008, but at that time Fermi-LAT data were not yet available. During January 2015 the source went through the brightest optical state ever observed, triggering MAGIC follow-up...
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Dr Marina Manganaro (IAC (Instituto de Astrofísica de Canarias))14/09/2016, 14:00
The blazar S4 0954+65 (at a disputed redshift of z=0.368 or z>=0.45) underwent an exceptionally high state in optical during January and February 2015, as revealed by the Tuorla and St. Petersburg University blazar monitoring programs: a brightening of more than 3 magnitudes in the R-band from the average monitored states. Simultaneous data from the Fermi/LAT satellite at high energy gamma...
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Bruce Allen (Max Planck Society/Albert Einstein Institute Hannover)14/09/2016, 19:00
On 14 September 2015, the advanced LIGO gravitational wave instruments detected the gravitational wave signal emitted as two black holes, about one billion light years away from Earth, made a final few orbits around each other then merged together. This was big news around the world, because scientists have tried to make such observations for more than half a century. Before they merged, the...
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Julien Lesgourgues (TTK, RWTH Aachen University)15/09/2016, 09:30
The next generation of cosmological surveys (of large scale structures, CMB polarisation, 21cm line), approved (Euclid, SKA, ...) or submitted (COrE+, LiteBird), have the potential to return a lot of relevant information for particle physics. I will present and comment some of the most recent sensitivity forecasts related to neutrino physics, light relics and Dark Matter properties.
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Jesús Zavala Franco15/09/2016, 10:00
Although there is substantial gravitational evidence for the existence of dark matter, its particle nature remains one of the biggest mysteries in modern physics. The favourite theoretical model, Cold Dark Matter (CDM), assumes that non-gravitational dark matter interactions are irrelevant for galaxy formation and evolution.
Surprisingly, current astronomical observations allow significant...
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Stefan Schael (Rheinisch-Westfaelische Tech. Hoch. (DE))15/09/2016, 11:00
The Alpha Magnetic Spectrometer, AMS, is a general purpose high energy particle phys- ics detector. It was installed on the International Space Station, ISS, on 19 May 2011 to conduct a unique long duration mission of fundamental physics research in space. Knowledge of the precise rigidity dependence of the proton and helium flux is important in understanding the origin, acceleration, and...
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Torii Shoji15/09/2016, 11:30
The CALorimetric Electron Telescope (CALET) on the International Space Station is an experiment
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aimed at precise measurements of the various components of the cosmic-ray spectrum. Its main
scientific goal is to measure the electron + positron flux above 1 GeV and to explore the TeV region
where the energy resolution is of the order of 2-3%, which can provide valuable data for dark... -
Roger Blandford (Stanford University)15/09/2016, 12:00
Over the past decade, gamma ray astrophysics has entered the astrophysical mainstream. Extremely successful space-borne (GeV) and ground-based (TeV) detectors, combined with a multitude of partner telescopes, have revealed a fascinating “astroscape" of active galactic nuclei, pulsars, gamma ray bursts, supernova remnants, binary stars, star-forming galaxies, novae much more, exhibiting major...
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Maria Archidiacono15/09/2016, 14:00
Neutrinos deeply affect cosmological observables, such as the cosmic microwave background and the power spectrum of matter fluctuations. Thanks to these fingerprints cosmology can detect the cosmic neutrino background and constrain the number of neutrino species and the neutrino mass sum with greater precision than current laboratory experiments. However cosmological bounds are model...
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Prof. Elliott Bloom (KIPAC-SLAC, Stanford University)15/09/2016, 14:00
I will present recent results on the Galactic Center from the Fermi-LAT Collaboration using 6.5 years of LAT Pass 8 data, and comparisons with previous works. My talk will focus on our new analysis of the Galactic Center that includes the Fermi Bubbles in some detail; in particular I will show the effect on the previously reported Galactic excess from low-latitude emission from the Fermi...
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Mikko Laine (U. Bern)15/09/2016, 14:00
The standard WIMP freeze-out analysis, based on Boltzmann equations,
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contains unknown theoretical uncertainties, which may start to matter
now that many benchmark scenarios are strongly constrained by data.
In this talk a few issues which are not always included in
phenomenological analyses are elaborated upon. In particular the
potential importance of strongly interacting bound states (e.g.... -
Björn Herrmann (LAPTh, CNRS / Université Savoie Mont Blanc)15/09/2016, 14:00
Calculating the neutralino relic density is a strong possibility to identify favoured and disfavoured regions of the parameter space of a supersymmetric theory such as the MSSM. With the latest results of the Planck mission, the cosmological parameters including the dark matter abundance are determined to an unprecedented precision. In order to reduce the theoretical uncertainty in the...
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Walter Winter (DESY)15/09/2016, 14:20
Modern proposed atmospheric neutrino oscillation experiments, such as PINGU in the Antarctic ice or ORCA in Mediterranean sea water, aim for precision measurements of the oscillation parameters including the ordering of the neutrino masses. They can, however, go far beyond that: Since neutrino oscillations are affected by the coherent forward scattering with matter, neutrinos can provide a new...
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Dr Tim Linden (The Ohio State University)15/09/2016, 14:20
Fermi-LAT observations have discovered a gamma-ray excess emanating from the Galactic center of the Milky Way. While this excess may be explained by populations of gamma-ray pulsars or by dark matter annihilation, it is worth noting that the intensity of this excess is comparable to the systematic uncertainties in the diffuse astrophysical gamma-ray emission near the Galactic plane. Thus, a...
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Felix Kahlhoefer (DESY)15/09/2016, 14:20
A new Z' boson with couplings to quarks and dark matter offers an intriguing possibility for setting the dark matter relic abundance via thermal freeze-out. Hadron colliders are a promising tool for probing this set-up using searches for dijet resonances. Nevertheless, there are various ways to hide the new mediator: the Z' could couple so strongly to dark matter that it decays almost always...
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Djuna Croon (University of Sussex)15/09/2016, 14:20
A trilinear coupling between an inflaton and the Standard Model Higgs boson opens up an exponentially enhanced decay channel. Such a coupling is for instance generically present in a combined Goldstone Inflation and Composite Higgs scenario. Here I will discuss our analysis of such a scenario and its constraints, paying attention to both the feasibility of the production of Standard Model...
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Stefan Vogl (Karlsruhe Institute of Technology)15/09/2016, 14:40
We show that simplified models used to describe the interactions of dark matter with Standard Model particles do not in general respect gauge invariance and that perturbative unitarity may be violated in large regions of the parameter space. The modifications necessary to cure these inconsistencies may imply a much richer phenomenology and lead to stringent constraints on the model. We...
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Carlos Arguelles (MIT)15/09/2016, 14:40
The IceCube neutrino telescope at the South Pole has measured the atmospheric muon neutrino spectrum as a function of zenith angle and energy. We have performed a search for eV-scale sterile neutrinos by looking at distortion in those distributions. Such a sterile neutrino, motivated by the anomalies in short-baseline experiments, is expected to have a significant signature in the...
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Guillermo Ballesteros Martinez (CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))15/09/2016, 14:40
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Emma Storm (GRAPPA, University of Amsterdam)15/09/2016, 14:40
The nature of the Galactic diffuse gamma-ray emission as measured by the Fermi Gamma-ray Space Telescope has remained an active area of research for the last several years. In particular, the discovery of a GeV excess towards the Galactic center has generated enormous interest in trying to understand its origins, whether astrophysical or more exotic. While most analyses of the GeV excess...
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Mrs Roberta Diamanti (University of Amsterdam)15/09/2016, 15:00
A mixed dark matter model consists of a cold dark matter (CDM) fraction and a fraction given by another dark component (non-cold). The free-streaming length increases with the velocity of the dark matter particle, varying from a scale value of Mpc for a warm dark matter component up to the size of Universe for a relativistic species that we label as dark radiation.
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We study these models... -
mattia di mauro (Stanford University)15/09/2016, 15:00
Several groups have demonstrated the existence of an excess in the gamma-ray emission around the Galactic Center (GC) with respect to the predictions from a variety of Galactic Interstellar Emission Models (GIEMs) and point source catalogs. The origin of this excess, peaked at a few GeV, is still under debate. A possible interpretation is that it comes from a population of unresolved...
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Thomas David Jacques (Scuola Int. Superiore di Studi Avanzati (IT))15/09/2016, 15:00
As results from Run II of the LHC continue to be released, it is important to evaluate the ways in which we study DM at colliders. EFTs can be a useful tool to constrain DM in a semi-model-independent way, but it is now clear that this approach has limitations.
EFTs are now supplemented by simplified models of dark matter, and it is important to approach these models in a logical and...
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Aldo Serenelli (Institute of Space Sciences (IEEC-CSIC))15/09/2016, 15:00
In this talk I will present the most recent generation of standard solar models (SSM) that include the latest developments in the input physics entering its calculations, most notably updated nuclear reaction rates and radiative opacity calculations and experimental results. I will describe the impact on SSM predictions for helioseismic diagnostics and solar neutrino fluxes and, in the light...
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Michael Duerr (DESY)15/09/2016, 15:20
A reliable comparison of different dark matter searches requires models that satisfy certain consistency conditions like gauge invariance and perturbative unitarity. These conditions can easily be satisfied in U(1)' extensions of the Standard Model, where a fermionic dark matter candidate as well as a new Z' gauge boson obtain their mass from the spontaneous breaking of the U(1)' by a dark...
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Dr Helene Dupuy (Universite de Geneve (CH))15/09/2016, 15:20
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Shayne Reichard (Purdue University)15/09/2016, 15:20
The dark matter experiment XENON1T is now operational and sensitive to all flavors of neutrinos emitted from a supernova through coherent elastic neutrino-nucleus scattering. We show that the proportional scintillation signal (S2) allows for a clear observation of the neutrino signal and guarantees a particularly low energy threshold, while the backgrounds are rendered negligible during the SN...
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Wim De Boer (KIT - Karlsruhe Institute of Technology (DE))15/09/2016, 15:20
An excess of diffuse gamma-rays towards the Galactic Center (GC) is usually assumed to originate from the GC with the most exciting interpretations being the contributions from dark matter (DM) annihilation and/or unresolved sources, like millisecond pulsars.
Up to now no studies have been undertaken to see if the excess occurs in other regions of the Galactic plane, which is a challenge,...
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Jan Heisig (RWTH Aachen University)15/09/2016, 15:40
We present an interpretation of the excess in the gamma-ray emission from the center of our galaxy observed by Fermi-LAT in terms of dark matter annihilation within the scalar singlet Higgs portal model. In particular, we include the astrophysical uncertainties from the dark matter distribution and allow for unspecified additional dark matter components. We demonstrate through a detailed...
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Dr Lucas Lombriser (University of Edinburgh)15/09/2016, 15:40
Scalar-tensor modifications of gravity have long been considered as an alternative explanation for the late-time accelerated expansion of our Universe. I will first show that a rigorous discrimination between acceleration from modified gravity and from a cosmological constant or dark energy is not possible with observations of the large-scale structure alone. I will then demonstrate how...
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Alessandro Mirizzi15/09/2016, 15:40
We present the physics potential of a future galactic supernova observation in probing neutrino properties. Particular attention will be devoted to neutrino oscillations in supernovae. It will be also discussed the modification of the observable supernova neutrino signal induced by the
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Dr marcos López Moya15/09/2016, 16:15
Most of the 200 gamma-ray pulsars detected by the Fermi-LAT space telescope exhibit sharp spectral cutoffs around a few GeV. This can be explained by classical pulsar models, in which gamma-ray emission originates from curvature radiation emitted by e-/+ pairs, accelerated either close to the neutron star surface or to the pulsar light cylinder. These models naturally predict the observed...
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Atsushi Takeda (University of Tokyo)15/09/2016, 16:30
Super-Kamiokande (SK), a large water Cherenkov detector located
underground at the Kamioka Observatory in Japan,
can search for weakly interacting massive particles (WIMPs)
by detecting WIMP-induced neutrinos from the Sun and the Milky Way.An excess of neutrinos from the Sun and Milky Way direction were
searched for compared to the expected atmospheric neutrino background.For the...
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Damiano Caprioli (Princeton University)15/09/2016, 16:30
I present the results of large kinetic (particle-in-cells) plasma simulations of particle acceleration at non-relativistic collisionless shocks, which in particular allow a first-principles investigation of diffusive acceleration at the blast waves of supernova remnants, the most prominent sources of Galactic cosmic rays (CRs).
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Ion acceleration efficiency and magnetic field amplification are... -
Dr Edward Porter (The LIGO-Virgo Collaboration)15/09/2016, 16:30
Advanced LIGO's first scientific run, between September 2015 and January 2016, will be
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historically remembered for the first direct detection of gravitational waves from an
astrophysical source. This run also provided the first direct evidence for the existence
of stellar-mass black hole binaries. In this talk, we will present details of the
detected sources, their astrophysical... -
Lara Nava15/09/2016, 16:45
The mechanism through which cosmic rays (CRs) propagate away from their accelerators still remains an open issue. The main difficulty is the high non-linearity of the problem: CRs themselves excite the magnetic turbulence that confines them close to their sources. We solve numerically the coupled differential equations describing the evolution in space and time of the escaping particles and of...
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Thomas Edwards (University of Amsterdam)15/09/2016, 16:45
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Morten Medici15/09/2016, 16:50
The IceCube Neutrino Observatory is a cubic kilometer neutrino detector located in the deep clear ice below the surface at the geographic South Pole. In the pursuit of a better understanding of particle physics, IceCube can be used to detect dark matter indirectly through the self-annihilation to neutrinos. In this talk I will discuss the dark matter searches in IceCube, and present the latest results.
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Vivien RAYMOND (Max Planck Institute for Gravitational Physics)15/09/2016, 16:50
Gravitational-wave astronomy has made a tremendous stride forward with detections during the first observing run of the Advanced Laser Interferometer Gravitational-wave Observatory (LIGO). The signals have been identified as originating from the merger of black holes, whose parameters it was possible to infer.
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In this talk I will explain how the parameter inference from gravitational-wave... -
Dr Carmelo Evoli (Gran Sasso Science Institute)15/09/2016, 17:00
Low-latitude Fermi-LAT data, together with the high resolution gas (CO & HI) and the dust opacity maps, has been recently exploited to study the radial emissivity of γ-rays induced by interactions of cosmic rays (CRs) with the interstellar medium along the Galactic Plane.
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Both the absolute emissivity and the energy spectra of γ-rays exhibit significant variations along the galactic... -
Philipp Mertsch15/09/2016, 17:00
The discovery of the Fermi bubbles - a huge bi-lobular structure seen in GeV gamma-rays above and below the Galactic center - implies the presence of a large reservoir of cosmic rays up to ~ 10 kpc from the disk. Diffuse shock acceleration, which is at work in known sources of cosmic rays, cannot explain the cosmic rays in the bubbles since there is no evidence for the presence of a strong...
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Leo Singer (NASA/Goddard)15/09/2016, 17:10
Advanced LIGO's direct observation of gravitational radiation from a binary black hole merger has sent quakes through the physics and astronomy community. In a few short years, the search for gravitational waves will complete its transformation from an experimental effort into a new discipline of observational astronomy as we rapidly build a sample of merging compact binaries. However, the...
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Mr Marco Chianese (Università di Napoli Federico II & INFN, Sezione di Napoli)15/09/2016, 17:10
IceCube evidence for extraterrestrial neutrinos poses the intriguing puzzle concerning their origin. The 4-years IceCube HESE data show a 2-sigma excess at low energy (60 - 100 TeV) with respect to an astrophysical power-law with spectral index -2, predicted by the standard Fermi mechanism. Moreover, the IceCube MESE data exhibit an excess located in the same energy range in both southern and...
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Daniele Gaggero15/09/2016, 17:15
We present DRAGON2, the new version of the well-known numerical package designed to simulate all processes related to cosmic-ray (CR) transport: diffusion (treated in a general, position-dependent way), reacceleration, advection, energy losses, nuclear processes.
This talk is focused on the propagation of hadrons, both from steady-state and transient sources in the Galaxy, discussing in...
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Mr Axel Donath (Max Planck Institute for Nuclear Physics, Heidelberg)15/09/2016, 17:15
A.Donath on behalf of the H.E.S.S. collaboration.
H.E.S.S. (High Energy Stereoscopic System) is a hybrid array of five imaging
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atmospheric Cherenkov telescopes in Namibia, operating in the very-high-energy (VHE) gamma-ray energy range between ~20 GeV and 100 TeV. In the past decade H.E.S.S. has conducted deep observations of Galactic regions of utmost importance for understanding... -
Dr Mariangela Settimo (CNRS)15/09/2016, 17:30
The nature and the origin of ultra-high energy cosmic rays (UHECRs), above 10^{17} eV, is still unknown. The Pierre Auger Observatory has been operating for more then 10 years obtaining a number of major breakthroughs. To answer the open questions on UHECRs the Observatory was conceived as an hybrid detector consisting of fluorescence telescopes overlooking an array of water Cherenkov stations...
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Graham Woan15/09/2016, 17:30
We have entered the advanced era for ground-based gravitational wave detectors in dramatic fashion. The improvement in sensitivity also benefits searches for continuous gravitational waves. Here I summarize the current activities, and plans for the future, of continuous wave searches in Advanced LIGO and Virgo data.
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Marco Drewes (Technische Universitaet Muenchen (DE))15/09/2016, 17:30
This talk is based on the recent review 1602.04816, which contains contributions from many different authors. Rather than focusing on any particular aspect, I aim to give a condensed summary of the status of the field.
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Alba Fernández-Barral (Institut de Fisica d'Altes Energies-IFAE)15/09/2016, 17:30
There are several types of Galactic sources that can potentially accelerate charged particles up to GeV and TeV energies. These accelerated particles can produce Very High Energy (VHE) gamma-ray emission through different processes like inverse Compton scattering of ambient photon fields by accelerated electrons.
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We present here the results of our observations on X-ray and gamma-ray binaries... -
Mr Marcel Strzys (Max Planck Institute for Physics, Germany)15/09/2016, 17:45
Gamma Cygni SNR (G78.2+2.1) is one of the first supernova remnants (SNR) detected in the high-energy gamma-ray band. It is a middle-aged SNR (~7000 years old) situated in the Cygnus region. The high-energy observations by VERITAS and Fermi-LAT revealed a complex, energy-dependent morphology of the SNR in the GeV-TeV band, different from that observed in X-rays. G78.2+2.1 also hosts the pulsar...
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John Belz (University of Utah)15/09/2016, 17:45
The Telescope Array (TA) is an observatory for the study of the highest energy cosmic rays (HECR). Located in Utah, U.S.A., TA consists of a surface scintillator array and a set of nitrogen fluorescence detectors which jointly allow hybrid reconstruction of cosmic ray induced extensive air showers. In this talk we will describe the cosmic ray energy spectrum as measured by TA over five orders...
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Vivian Poulin (LAPTh, Annecy-le-vieux and RWTH, Aachen)15/09/2016, 17:50
In this talk, I would like to review how the combination of CMB power spectra, spectral distortions and BBN can be used to put stringeant constraints on the lifetime and abundance of exotic particles (such as dark matter but not only) with electromagnetic decay products. I will emphasize that this has the major advantages over cosmic rays of beeing (almost) free of theoritical uncertainties...
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Dr Chris Van Den Broeck (Nikhef)15/09/2016, 17:50
The direct detection of gravitational waves with Advanced LIGO has opened up the possibility of probing the genuinely strong-field dynamics of pure spacetime for the first time. Several tests of general relativity (GR) were carried out with the gravitational wave events GW150914 and GW151226. In the case of GW150914, the merger itself was in the most sensitive part of the detectors' frequency...
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denise boncioli15/09/2016, 18:05
Ultra high energy cosmic rays (UHECRs) are expected to be accelerated in astrophysical sources and to travel through extragalactic space before hitting the Earth atmosphere. They interact both with the environment in the source and with the intergalactic photon fields they encounter, causing different processes at various scales depending on the photon energy in the nucleus rest...
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Manuel Meyer (Stockholm University)15/09/2016, 18:10
Axionlike particles (ALPs) are dark-matter candidates that occur in a variety of extensions of the Standard Model. Signatures of these particles could be detected at gamma-ray energies with the Fermi Large Area Telescope (LAT) due to the coupling of ALPs to photons in external electromagnetic fields. To date, Fermi-LAT observations provide the strongest constraints on the photon-ALP coupling...
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Dr Giancarlo Cella (INFN sez. Pisa)15/09/2016, 18:10
A stochastic background of gravitational waves can be described as a superposition of several uncorrelated contributions. It can be of both cosmological and astrophysical origin. In the first case, it can constitute potentially a unique probe of the primordial universe. In the second, it can give precious information on stellar populations.
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After discussing how this kind of signal can be... -
Jonas Heinze (DESY)15/09/2016, 18:20
We fit the recent UHECR spectrum measurements from the Telescope Array
experiment under the assumption of pure proton composition, as assumed by the proton dip model.We present a a full scan of the three main physical model parameters of
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UHECR-injection: source redshift evolution, injected maximal proton energy
and spectral power-law index. We discuss how the result... -
Ralf Matthias Ulrich (KIT - Karlsruhe Institute of Technology (DE))16/09/2016, 09:30
Many LHC measurements are already used to improve hadronic interaction models used in cosmic ray analyses. This already had a positive effect on the model dependence of crucial data analyses. Some of the data and the model tuning is reviewed. However, the LHC still has a lot more potential to provide crucial information. Since the start of Run2 the highest accelerator beam energies are reached...
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Xin Wu (Universite de Geneve (CH))16/09/2016, 10:00
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Fiorenza Donato (INFN - National Institute for Nuclear Physics)16/09/2016, 11:00
The data we are receiving from galactic cosmic rays are reaching an unprecedented precision, over very wide energy ranges. Nevertheless, many problems are still open, while new ones seem to appear when data happen to be redundant. We will discuss some paths to possible progress in the theoretical modelling and experimental exploration of the galactic cosmic
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radiation. -
Michelangelo Mangano (CERN)16/09/2016, 11:30
I outline the goals of the future LHC programme, and the current understanding of the physics potential of the possible next generation of lepton and hadron colliders.
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16/09/2016, 12:00
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Dr David PANEQUE16/09/2016, 13:45
Discovering the nature of dark matter (DM) is one of the fundamental challenges of the modern physics. Indirect DM searches are looking for signatures from annihilation and/or decay of DM particles into standard matter in highly DM dominated cosmic regions, such as the Galactic Center, clusters of galaxies, and dwarf spheroidal satellite galaxies (dSphs) of the Milky Way.
In the widely...
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Hamish Silverwood (University of Amsterdam)16/09/2016, 14:00
An accurate determination of the local dark matter (DM) density is crucial to interpreting data from direct detection and certain indirect detection experiments, as it is degenerate with the DM-nucleon interaction strength. Here I give an update to our ongoing project to make a determination of the local DM density. Our method uses the positions and velocities of a set of tracer stars...
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Daniel Fiorino (University of Maryland College Park)16/09/2016, 14:00
The HAWC Observatory in Sierra Negra, Mexico has recently recorded its trillionth cosmic-ray air shower in just over 1 year of operation. Using this high statistics data set, we have studied the arrival direction distribution of ~1-100 TeV cosmic rays. The sub-degree angular resolution of the air shower reconstruction allows us to examine the known features of the Northern TeV cosmic-ray sky...
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Paolo Salucci (SISSA)16/09/2016, 14:00
The nature of dark matter is perhaps the most intriguing and open issue in Physics, whose resolution is likely to bring us beyond the Standard Model. The experimental energy scale of TeV is most pivotal for the recent advances in the booming field of astroparticle. On the other side, recent astrophysical observations have revealed, in the distribution of matter in Galaxies, some extremely...
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Prof. Brian Humensky (Columbia University)16/09/2016, 14:00
VERITAS is an array of imaging atmospheric Cherenkov telescopes devoted to the study of the gamma-ray sky in the energy range between 85 GeV and > 30 TeV. VERITAS observations enable a broad program of scientific inquiry, including the study of extreme astrophysical sources both within and beyond our galaxy, the search for dark matter, and a number of topics in astroparticle physics. We...
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Frank McNally (University of Wisconsin - Madison)16/09/2016, 14:20
The IceCube Neutrino Observatory has accumulated a total of 318 billion cosmic-ray induced muon events between May 2009 and May 2015. This data set was used for a detailed analysis of the cosmic-ray arrival direction anisotropy in the TeV to PeV energy range. The observed global anisotropy features large regions of relative excess and deficit, with amplitudes on the order of $10^{-3}$ up to...
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James Thomas Linnemann (Michigan State University (US))16/09/2016, 14:20
The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a continuously operated, wide field-of-view (FOV) observatory sensitive to 100 GeV - 100 TeV gamma rays. HAWC has been making observations since summer 2012 and officially commenced data-taking operations with the full detector in March 2015. With an instantaneous FOV of 2 steradians, HAWC observes 2/3 of the sky in 24 hours and...
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Ms Melissa Corona Van Beekveld (IMAPP Radboud University (NL))16/09/2016, 14:20
Observations with the Fermi Large Area Telescope indicate an excess in gamma rays originating from the center of our Galaxy. A possible explanation for this excess is the annihilation of Dark Matter (DM) particles. We have investigated the annihilation of neutralinos as DM candidates within the phenomenological Minimal Supersymmetric Standard Model (pMSSM) and found solutions that are not...
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Giovanni Rosa (Universita e INFN, Roma I (IT))16/09/2016, 14:30
NEWS collaboration submitted Letter of Intent to the Gran Sasso Scientific
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Committee last year. Since a few years a lot of R&D is undertaken in emulsion and scanning technologies in the collaboration. We would like to report ongoing activities; reporting the update on our sensitivity including the direction information. Please consider abstract below for oral presentation in the TeV particle... -
Aldo Morselli (INFN)16/09/2016, 14:40
The nature of dark matter (DM) is a longstanding enigma of physics; it may consist of particles beyond the Standard Model that are still elusive to experiments.
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Indirect DM searches with the Fermi Gamma-ray Space Telescope and Imaging Atmospheric Cherenkov Telescopes (IACTs) are playing a crucial role in constraining the nature of the DM particle through the study of their annihilation into... -
Stefan Zeissler (KIT - Karlsruhe Institute of Technology (DE))16/09/2016, 14:40
The search for cosmic positron anisotropy has been performed using particles collected by the Alpha Magnetic Spectrometer on the International Space Station. The positron to electron ratio is consistent with isotropy at all energies and angular scales. The analysis of the positron to proton ratio yields consistent results.
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Sebastian Bruggisser (DESY Theory-Group)16/09/2016, 14:40
Effective theories are a great tool to present constraints on broad BSM assumptions in a rather model-independent fashion. However, effective theories have a limited range of validity which can, especially in collider searches, complicate an analysis. We argue that in order to achieve a consistent analysis more specific hypotheses about BSM physics are needed and can subsequently be tested....
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Alan Robinson (Fermilab)16/09/2016, 14:50
The particle nature of dark matter is being investigated vigorously by searches for its production, annihilation, decay, and scattering. Assuming dark matter is produced thermally, dark matter particle masses must lie within a wide range of masses between the keV and TeV scales. Theoretical simplicity and the available technology motivated most existing direct searches for dark matter...
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Markus Ahlers16/09/2016, 15:00
Recent measurements of the dipole anisotropy in the arrival directions of Galactic cosmic rays (CRs) indicate a strong energy dependence of the dipole amplitude and phase in the TeV-PeV range. We argue here that these observations can be well understood within standard diffusion theory as a combined effect of (i) one or more local sources at Galactic longitude 120deg < l < 300deg dominating...
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Richard Bartels (University of Amsterdam)16/09/2016, 15:00
The past two decades have seen a rapid development of $\gamma$-ray astronomy, in particular at energies above a few hundred MeV where Fermi-LAT has revolutionised the field. As a result, extensive studies have been undertaken to characterise gamma-ray annihilation spectra of dark matter with masses above $\sim 1 \mathrm{\,GeV}$. However, due to the lacking sensitivity of current experiments at...
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Dr Narendra Sahu (IIT HYderabad, India)16/09/2016, 15:00
Recent data from CMS and ATLAS experiments at CERN LHC suggest a diphoton excess of invariant mass around 750 GeV. Apparently the width of the resonance is around 45 GeV. To explain this anomaly we introduce a singlet scalar and a dark sector comprising of a vector-like lepton doublet and a singlet which are odd under a Z_2 symmetry. As a result the dark matter emerges as an admixture of the...
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Sridhara Dasu (University of Wisconsin-Madison (US))16/09/2016, 15:10
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Andi Hektor (Nat. Inst. of Chem.Phys. & Biophys. (EE))16/09/2016, 15:20
Standard Model and Dark sector can be related via a (pseudo)scalar mediator particle, 'messenger'. The scenario belongs to a wider class of 'simplified models' of DM. One can think the models expand the pure effective operator interactions including the degrees of freedom of a mediator particle. We will present some physical scenarios having a TeV scale messenger (for example, 750 GeV). We...
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Ranjan Laha (Stanford University)16/09/2016, 15:20
Dark matter decays or annihilations that produce line-like spectra may be smoking-gun signals. However, even such distinctive signatures can be mimicked by astrophysical or instrumental causes. We show that velocity spectroscopy-the measurement of energy shifts induced by relative motion of source and observer-can separate these three causes with minimal theoretical uncertainties. The...
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Silvia Manconi (INFN - National Institute for Nuclear Physics)16/09/2016, 15:20
High energy cosmic ray electrons and positrons probe the local properties of
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our Galaxy. In fact, regardless of the production mechanism, electromagnetic
energy losses limit the typical propagation scale of GeV-TeV electrons and
positrons to a few kpc.
In the diffusion model, the presence of nearby and dominant sources may produce
an observable dipole anisotropy in the cosmic ray... -
Dr Alexander Kish (University of Zurich)16/09/2016, 15:30
In this talk I will present the concept of the DARWIN detector, discuss its physics reach in various channels, the main sources of backgrounds, as well as the ongoing detector design and R&D efforts.
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Jia Liu (Johannes Gutenberg University Mainz)16/09/2016, 15:40
It is well known that a star can capture dark matter (DM) particles, which
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condense close to its center and eventually annihilate. In this work, we
trace capture, evaporation and annihilation rates
throughout the life of a massive star and show that it culminates in an
intense annihilation burst coincident with the death of the star in a core
collapse supernova. The reason is... -
Dr GOUDELIS Andreas (HEPHY - Vienna)16/09/2016, 15:40
Momentum-dependent couplings between dark matter and the visible sector can appear in models where dark matter is a pseudo-Nambu-Goldstone boson, a scalar field associated with the spontaneous breaking of a global symmetry at a given energy scale. From a low-energy perspective, these couplings appear as non-renormalizable operators involving derivatives at the effective Lagrangian level. The...
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Dr Gwenael Giacinti (MPIK Heidelberg)16/09/2016, 15:40
IceTop and IceCube have observed a mysterious cold spot in the angular distribution of high energy ($\ge 100$ TeV) cosmic rays (CR), thereby placing interesting constraints on their transport properties. We examine here these constraints by comparing the observations with the predictions of pitch-angle diffusion in various kinds of turbulence. In the case of Alfvenic turbulence with a...
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Torsten Bringmann (University of Oslo)
We introduce a radically new version of the widely used DarkSUSY package, which allows to compute the properties of dark matter particles numerically. With DarkSUSY 6 one can accurately predict a large variety of astrophysical signals from dark matter, such as direct detection in low-background counting experiments and indirect detection through antiprotons, antideuterons, gamma-rays and...
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Dr Marco Ajello (Clemson University)
Models of the extragalactic gamma-ray background (EGB) show that its intensity can be ascribed to the integrated emission of source populations already detected by the Fermi Large Area Telescope (LAT). Taking advantage of the sensitivity increase yielded by Pass 8, the new event-level analysis, we tested this hypothesis employing a photon fluctuation analysis above 50 GeV. For the first time...
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Xiaojun Bi (Institute of High Energy Physics, CAS)
The Alpha Magnetic Spectrometer (AMS-02) has published the unprecedentedly precise measurement of the cosmic electron and positron spectra， as well as the positron fraction and anti-proton fraction. We have given a quantitative study on the AMS-02 results by a global fitting to the electron and positron spectra, together with the positron fraction data. The primary electron spectrum and the...
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Dr Bjorn Herrmann (Unite Reseaux du CNRS (FR))
The model T12A addresses two major questions of modern particle physics: by adding fermionic and bosonic singlets and doublets to the Standard Model particle content, this model allows to radiatively generate neutrino masses, while at the same time it includes viable candidates for the cold dark matter in our Universe.
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We present the first extensive study of the parameter space of this model...
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