Dr
Gianpiero Mangano
(INFN)
20/06/2017, 11:20
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
I will review the present status of BBN predictions, new ab initio calculations for deuterium destruction processes and the overall compatibility of theory versus data also in light of Planck results.
Dr
Juliana Kwan
(University of Tokyo)
20/06/2017, 11:50
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The Dark Energy Survey (DES) is an ongoing photometric survey that
will cover 5000 sq deg of the Southern sky over five years with the
aim of determining the origin of cosmic acceleration. Two of the key
probes involved in achieving this goal are the large scale clustering
of galaxies and weak gravitational lensing, which are more powerful
when taken in combination, since the dependence...
Dr
Amol Upadhye
(Argonne National Lab)
20/06/2017, 12:10
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Current and near-future measurements of cosmic structure will provide unprecedented constraints on the initial density field. A sharply blue-tilted isocurvature component of the density fluctuations, indicative of an evolving mass during inflation, can evade CMB constraints but is accessible to large-scale structure observations. I discuss an axionic spectator field model whose power...
Volodymyr Takhistov
(UCLA)
20/06/2017, 12:30
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
We show that some or all of the observed inventory of r-process nucleosynthesis can be produced in interactions of primordial black holes (PBHs) with neutron stars (NSs) if PBHs of 10^(−14) to 10^(−8) solar masses make up a few percent or more of the dark matter. A PBH captured by a neutron star (NS) sinks to the center of the NS and consumes it from the inside. When this occurs in a rotating...
Maximilian Totzauer
(Max-Planck-Institut für Physik)
20/06/2017, 14:30
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Among their many connections to open issues of particle or astro physics, sterile neutrinos in the keV mass range are very well motivated dark matter candidates. Unlike the famous WIMP, dark matter in the keV mass range would by far overclose the universe if it was produced in a standard thermal freeze-out scenario. A variety of non-thermal production mechanisms for keV sterile neutrinos can...
Dr
Rasmus Sloth Lundkvist Hansen
(Max-Planck-Institut fuer Kernphysik)
20/06/2017, 15:00
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Sterile neutrinos produced through resonant or non-resonant oscillations are a well motivated dark matter candidate, but recent constraints from observations have ruled out most of the parameter space. On the one hand, observations of large scale structures by using the Lyman-alpha forest put strong constraints on warm dark matter, and puts a lower limit on the sterile neutrino mass. On the...
Mr
Stefano Gariazzo
(IFIC-CSIC)
20/06/2017, 15:20
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The Cosmic Neutrino Background is a prediction of the standard cosmological model, but it has been never observed directly. Experiments with the aim of detecting relic CNB neutrinos are under development. The expected event rate in these detectors depends on the local density of relic neutrinos. Since massive neutrinos can be attracted by the gravitational potential of our galaxy and cluster...
Dr
Ye-Ling Zhou
(IPPP, Durham University)
20/06/2017, 15:40
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
This talk will focus on a totally new mechanism of leptogenesis we proposed recently. It requires only the Weinberg operator and a phase transition at a sufficiently high scale. While the Weinberg operator is used to generate light neutrino masses, phase transition is strongly motivated by the breaking of some underlying symmetries, such as B-L symmetry and flavour symmetries. During the phase...
Dr
Francesco Villante
(University of L'Aquila)
20/06/2017, 16:30
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The interaction of cosmic rays with the gas contained in our Galaxy is a guaranteed source of diffuse high energy neutrinos. We provide expectations for this component by considering different assumptions for the cosmic ray distribution in the Galaxy which are intended to cover the large uncertainty in cosmic ray propagation models. We calculate the angular dependence of the diffuse galactic...
Prof.
INA SARCEVIC
(UNIVERSITY OF ARIZONA)
20/06/2017, 16:50
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The IceCube detection of High Energy Starting Events (HESE) and
the upward muon track events (6 year data) are presently hard to
explain with the single power-law astophysical flux for
energies above 30TeV. We investigate the possibility that a
significant component of the additional neutrino flux originates
due to the decay of a very heavy dark matter particle via several
possible...
Ali Kheirandish
(University of Wisconsin, Madison)
20/06/2017, 17:10
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
IceCube’s discovery of cosmic neutrinos has opened a new window to explore the high-energy Universe. IceCube has continued to observe cosmic neutrinos since their discovery. The origin of the observed neutrinos is still unknown, and their arrival directions are compatible with an isotropic distribution. This observation, together with dedicated studies of Galactic plane correlations, suggest a...
Regina Caputo
(CERN)
20/06/2017, 17:30
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The era of precision cosmology has revealed that ~80% of the total amount of matter in the universe is dark matter. One promising candidate, motivated by both particle physics and astrophysics, is the Weakly Interacting Massive Particle (WIMP). WIMPs are predicted to produce gamma rays via annihilation or decay which are detectable by the Fermi Large Area Telescope (Fermi-LAT). Indirect...
Dr
Ranjan Laha
(KIPAC, Stanford University and SLAC)
20/06/2017, 17:50
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
ark 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 principal...
Gary Binder
(Lawrence Berkeley National Laboratory/University of California Berkeley)
20/06/2017, 18:10
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
At the IceCube Neutrino Observatory, atmospheric and astrophysical neutrino fluxes become attenuated after passing through the Earth at energies above 40 TeV. This provides a unique method to measure the neutrino-nucleon cross section at energies significantly beyond previous accelerator-based approaches that reach 400 GeV. Here we report on the first measurement of neutrino absorption in the...
Dr
Spencer Klein
(LBNL & UC Berkeley)
21/06/2017, 11:30
Astroparticle Physics and Cosmology Working Group
High-energy (above 10^17 eV) neutrinos that interact in rock or ice will produce an intense pulse of radio waves via the Askaryan effect. These pulses are an attractive signal for experiments to search for high-energy astrophysical neutrinos. After introducing the Askaryan effect, I will present results from existing experiments that use the Moon and Antarctic ice as targets, and then...
Prof.
Antonio Capone
(Physics Department University "La Sapienza" and INFN - Roma)
21/06/2017, 12:00
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
ANTARES latest results and KM3NeT status and perspectives
Morten Medici
(Niels Bohr Institute, University of Copenhagen)
21/06/2017, 12:20
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The IceCube Neutrino Observatory searches for a neutrino signal from dark matter self-annihilations in the sun, the earth, and the galactic halo. The signal neutrinos are identified as events with reconstructed energies and arrival directions that correspond to the distribution expected in dark matter self-annihilations. The latest results from IceCube will be presented with focus on the...
Ms
Katarzyna Frankiewicz
(National Centre for Nuclear Research)
21/06/2017, 12:40
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Indirect searches for dark matter (DM) were performed based on atmospheric neutrino data collected with the Super-Kamiokande (SK) detector in years 1996-2016. The excess of neutrinos from possible DM sources such as Sun, Earth and Galactic Center, compared to the expected atmospheric neutrino background was searched. All event samples (fully-contained, partially-contained along with...
Prof.
Dinesh Loomba
(University of New Mexico)
21/06/2017, 14:30
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The WIMP direction at Earth undergoes a diurnal modulation that, if detected, would provide one of the most powerful and unambiguous signatures for discovery of Galactic dark matter. The number of experiments aimed at detecting this signature have greatly expanded in the last decade. Besides traditional technologies used to measure tracks of WIMP induced nuclear recoils in the detector, a...
Dr
Sara Diglio
(Subatech)
21/06/2017, 15:00
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Understanding of the nature of the Dark Matter is one of the biggest challenges in frontier science today.
Astrophysical and cosmological observations provide strong evidences for its existence. A number of proposed candidates have been put forward over time: one of the most compelling are Weakly Interacting Massive Particles (WIMPs). The XENON1T dark matter experiment aims at finding direct...
Dr
Mengjiao Xiao
(University of Maryland, College Park)
21/06/2017, 15:20
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The nature of dark matter is one of the most fundamental problems in physics. One compelling class of dark matter particles are the so-called WIMPs (Weakly Interacting Massive Particles), which can be searched in deep underground direct detection experiments. The PandaX (Particle AND Astrophysical Xenon) project is a staged xenon-based underground experiment at the China Jin-Ping Underground...
Dr
Katsuki Hiraide
(ICRR, the University of Tokyo)
21/06/2017, 15:40
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
XMASS is a multi-purpose experiment using a single-phase liquid-xenon scintillator detector located underground at Kamioka Observatory in Japan. We started the first data taking in December 2010 and conducted various dark matter searches such as light WIMPs, WIMP-129Xe inelastic scattering, and bosonic super-WIMPs. We are continuously taking data since November 2013. With these long-term data,...
Dr
Yasuo Takeuchi
(Dept. of Physics, Grad. School of Science, Kobe Univ.)
21/06/2017, 16:30
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Super-Kamiokande (SK) has been observing astrophysical neutrino interaction, such as solar neutrinos, for more than 20 years. SK has great sensitivity to measure supernova neutrino interactions. Currently, the 4th phase of the experiment (SK-IV) is running with an analysis energy threshold of 3.5 MeV electron kinetic energy. The accumulated live time for solar neutrino observation of all...
Ms
Huiling Li
(Shandong University)
21/06/2017, 16:50
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The Jiangmen Underground Neutrino Observatory(JUNO) is a multi-purpose neutrino experiment, currently under construction in China. Its central detector is designed as a liquid scintillator detector of a 20kton fiducial mass with energy resolution of $3\%/\sqrt{E(MeV)}$, deployed in a laboratory 700 meters underground shielded by rock. Measuring the neutrino burst from the next nearby...
Juergen Reichenbacher
(South Dakota School of Mines and Technology)
21/06/2017, 17:10
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The Deep Underground Neutrino Experiment (DUNE) experiment, a 40-kton underground liquid argon time-projection-chamber detector, will have unique sensitivity to the electron flavor component of a core-collapse supernova neutrino burst. We present expected capabilities of DUNE for measurements of neutrinos in the few-tens-of-MeV range relevant for supernova detection, and the corresponding...
Steven Gardiner
(University of California, Davis)
21/06/2017, 17:30
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The next galactic core-collapse supernova will be an exciting opportunity for the neutrino physics and astrophysics communities. The successful detection of many neutrinos from this event would allow us to test models of supernova dynamics, perform neutrino oscillation measurements over astronomical distances, and search for a variety of exotic physics beyond the Standard Model. While many of...
Prof.
John Gregory Learned
(University of Hawaii, Manoa)
21/06/2017, 17:50
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Electron anti-neutrinos have been studied now for more than half a century, starting with the first observation of electron antineutrinos from reactors by Reines and Cowan. Neutrinos from Supernovae were see in SN1987A in several large detectors. Solar neutrinos remained problematic until the SNO detector results in 2002. The long anticipated observations of neutrinos from radioactive...
Francesco Lombardi
(University of California, San Diego)
21/06/2017, 18:10
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The Borexino experiment is running at the “Laboratorio del Gran Sasso” in Italy since 2007. Its technical distinctive feature is the unprecedented ultralow background of the inner scintillating core, which is the basis of the outstanding achievements accumulated by the experiment.
In this talk, after recalling the main features of the detector, the impressive solar data gathered so far by...
Dr
Mathew Madhavacheril
(Princeton University)
23/06/2017, 09:00
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Cosmological observations are sensitive to the sum of neutrino masses and the number of light relativistic species in the early universe. In particular, high-resolution measurements of the cosmic microwave background (CMB) are approaching the sensitivity required to rule out an inverted neutrino hierarchy. Through parallel probes including lensing of the CMB and the counting of galaxy...
Dr
Yuji Chinone
(University of California, Berkeley)
23/06/2017, 09:20
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
POLARBEAR is a ground-based experiment which is designed to measure the Cosmic Microwave Background (CMB) B-mode polarization at arcminute resolution in the Atacama Desert of Northern Chile. We started our science observations in early 2012 at 150 GHz with an array of 1,274 polarization sensitive antenna-coupled Transition Edge Sensor (TES) bolometers. The CMB B-mode polarization on degree...
Dr
Christian Reichardt
(University of Melbourne)
23/06/2017, 09:40
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Measurements of the polarization of the cosmic microwave background (CMB) are rapidly becoming an important tool to test the standard LCDM model of cosmology. Future CMB experiments take aim at questions such as: Did inflation occur, and what physics was responsible for it? What are the neutrino masses? Are there new particle species (such as sterile neutrinos) that we can detect...
Dr
Tomohiro Nakama
(Johns Hopkins University)
23/06/2017, 10:10
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The small-scale crisis, discrepancies between observations and
N-body simulations, may imply suppressed matter
fluctuations on subgalactic distance scales. Such a suppression
could be caused by some early-universe mechanism (e.g., broken
scale-invariance during inflation), leading to
a modification of the primordial power spectrum at the onset of
the radiation-domination era. ...
Prof.
Bhaskar Dutta
(Texas A&M University)
23/06/2017, 11:20
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
The recent results from the ongoing Large Hadron Collider, various direct and indirect dark matter detection experiments and data from PLANCK satellite observations have introduced considerable constraints on the particle physics model ideas. This talk will address the current status of the surviving particle physics models and their predictions.
Mr
Carsten Krauss
(University of Alberta)
23/06/2017, 11:50
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
Dark matter searches with fluorinated target materials have an excellent sensitivity for spin dependent interactions. Bubble chambers can hold large amounts of fluorine and have an extraordinary ability to suppress gamma backgrounds and reject alpha background. A bubble chamber can also be operated with varying target liquids allowing to test different dark matter couplings.
The PICO 60...
Jay Hyun Jo
(Yale University)
23/06/2017, 12:10
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
COSINE-100 is a dark matter direct detection experiment using low-background NaI(Tl) crystals to test the DAMA collaboration's claimed detection of the dark matter annual modulation. The first phase of the experiment, situated at Yangyang Underground Laboratory in South Korea, consists of 8 NaI(Tl) crystals with a total mass of ~106 kg and ~2000 liters of liquid scintillator as an active veto....
Dr
Michael Willers
(Technical University of Munich)
23/06/2017, 12:30
Astroparticle Physics and Cosmology Working Group
Working Group Sessions
CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) is a direct dark matter (DM) search experiment located in the Gran Sasso underground laboratory (LNGS, Italy). The third stage of CRESST (CRESST-III) which successfully started in summer of 2016 and is currently taking data, aims at a significant improvement of the sensitivity in the low mass (< 10 GeV/c2) parameter space...