Pierre SALATI
(Laboratoire d'Annecy-le-Vieux de Physique Théorique LAPTh)
6/5/14, 9:10 AM
As one of the crazy guys who started working in the field, I will present a short historical introduction to the production and propagation of antinuclei in space. I will summarize the essential ingredients -- the factorization scheme, the coalescence momentum, the importance of kinematics in disentangling between secondary and dark matter antideuterons, spherical versus boosted coalescence --...
Prof.
Nicolao Fornengo
(University of Torino and INFN)
6/5/14, 9:40 AM
I will discuss the current understanding and open questions in the theoretical determination of the cosmic antideuteron dark matter signal.
Mr
Sebastian Wild
(Technical University Munich)
6/5/14, 10:10 AM
The search for cosmic antideuterons has been proposed as a promising and clean method to indirectly detect dark matter, due to the very small background flux from spallations expected at the energies relevant to experiments. In this talk I will first present an updated calculation of the background flux, and then discuss the prospects to observe antideuterons from dark matter annihilations or...
Dr
Michael Grefe
(Universität Hamburg)
6/5/14, 11:10 AM
I will discuss antiprotons and antideuterons produced in the decays of gravitino dark matter in the Milky Way. The gravitino in models with bilinear (or trilinear) R-parity violation is a well-motivated candidate for decaying dark matter in supergravity theories. I will show that observations of cosmic-ray antiprotons allow to set stringent constraints on the gravitino lifetime. Moreover, I...
Dr
Mirko Boezio
(Istituto Nazionale di Fisica Nucleare - Sezione di Trieste)
6/5/14, 12:10 PM
Antiparticles are a natural component of the cosmic radiation being produced in the interaction between cosmic rays and the interstellar matter. They have been shown to be extremely interesting for understanding the propagation mechanisms of cosmic rays. Furthermore, positrons and antiprotons may also be created by dark matter particle annihilations in the galactic halo. Positrons can also be...
Dr
Makoto Sasaki
(NASA/GSFC/CRESST/UMCP)
6/5/14, 2:00 PM
The BESS collaboration carried out 11 scientific balloon flights including two long-duration flights over Antarctica during 16 years from 1993 to 2008. Taking advantage of the quick turnaround between balloon flights, the instrument was improved and adapted to our specific scientific objectives flight by flight. The evolution of BESS antiproton measurements is a great example. These started...
Dr
Julia Hoffman
(National Central University, Taiwan)
6/5/14, 3:00 PM
The second generation of the Alpha Magnetic Spectrometer - AMS-02 - is a state-of-the-art detector that has been operating onboard the International Space Station (ISS) for the last 3 years; since then, more than 48 billion events have been detected. One of the goals of AMS-02 is to search for antimatter and dark matter. The AMS-02 detector is composed of several sub-detectors, which can be...
Dr
Antje Putze
(LAPTh/LAPP)
6/5/14, 4:00 PM
The propagation of cosmic rays (CRs) is still poorly understood, but it plays a key role in the physical processes of our Galaxy. By understanding CR propagation, we can determine which objects produce and accelerate them, and gain insights into the nature of dark matter. Anti-deuterons are a very promising and timely CR channel in which to look for indirect evidence of dark matter...
Nicolao Fornengo
(University of Torino and INFN)
6/5/14, 4:30 PM
Galactic dark matter annihilations (or decay) can produce cosmic-ray anti-nuclei via the nuclear coalescence of the anti-protons and anti-neutrons originated directly from the annihilation process. Since anti-deuterons have been shown to offer a distinctive dark matter signal, with potentially good prospects for detection in large portions of the dark matter particle parameter space, we...
Mr
Eric Carlson
(University of California Santa Cruz)
6/5/14, 5:00 PM
Cosmic-ray anti-nuclei provide a promising discovery channel for the indirect detection of particle dark matter. Hadron showers produced by the pair-annihilation or decay of Galactic dark matter generate anti-nucleons which can in turn form light anti-nuclei. Previous studies have only focused on the spectrum and flux of low energy antideuterons which, although very rarely, are occasionally...
Prof.
Gregory Tarlé
(University of Michigan)
6/6/14, 9:00 AM
I present a simple analytic model for the diffusion of cosmic rays through intergalactic space. Estimates for the intergalactic magnetic field provide severe constraints on the mean free path for cosmic ray diffusion. For reasonable models and energies below 10^6 GeV, a completely negligible number of particles can enter our Galaxy from distances greater than ~100 Mpc. Particle destruction...
Philipp Mertsch
(KIPAC, Stanford University)
6/6/14, 9:30 AM
Recently, the AMS-02 collaboration has presented data on cosmic ray protons, Helium, electrons and positrons as well as the boron-to-carbon ratio. We present the first consistent modelling of these data, paying particular attention to the contribution due to production and acceleration of secondary electrons and positrons in nearby supernova remnants. This process results in an additional,...
Dr
Fiorenza Donato
(Torino University)
6/6/14, 10:00 AM
oral
I will review the effects of propagation of antideuterons in the Milky Way. The discussion will touch both the primary sources, such as the dark matter annihilating in the galactic halo, and the secondary ones, due to spallation of relativistic cosmic rays on the interstellar medium.
Dr
Rui Miguel Faisca Rodrigues Pereira
(University of Hawaii at Manoa)
6/6/14, 11:00 AM
AMS (Alpha Magnetic Spectrometer) is an experiment designed to perform a very precise measurement of the cosmic-ray spectrum at the top of the Earth's atmosphere, covering the energy range from hundreds of MeV to the TeV. The AMS-02 detector was installed aboard the International Space Station on 19 May 2011. The rate of event collection is approximately 500 Hz or 1.6*10^10 events per year. An...
Dr
Stefania Bufalino
(INFN-Sezione di Torino)
6/6/14, 11:30 AM
The unprecedented high collision energies at the Large Hadron Collider give rise to a significant production of
light nuclei and anti-nuclei in proton-proton, proton-lead, and particularly in Pb-Pb collisions.
With its excellent particle identification capabilities based on the specific energy loss (dE/dx)
in the Time Projection Chamber and time-of-flight measurements, ALICE
is very...
Dr
Brian Hamilton
(University of Maryland)
6/6/14, 12:00 PM
As limits on their flux improves, cosmic ray antideuterons are expected to be a powerful low-background probe of dark matter annihilation to colored particles. Despite their promise in this field, the spectrum and rate of production of antideuterons from hadronization processes is still highly uncertain. We present measurements of the production rates of antideuterons in Upsilon (nS)...
Dr
Sergey Ostapchenko
(Stanford University)
6/6/14, 2:30 PM
I shall briefly review Monte Carlo models of hadronic and nuclear interactions, used in the high energy cosmic ray field. In particular, I'll illustrate the possibility to push some of those models into the low energy range, with potential applications for calculations of gamma-ray and antiproton fluxes. A special attention will be devoted to the calculation of the so-called nuclear...
Lars Andreas Dal
(University of Oslo)
6/6/14, 3:00 PM
I will discuss the influence of hadronization on antideuteron formation.
Antideuteron production in the coalescence model depends on momentum
differences between nucleons that are small compared to ΛQCD, which makes the process highly sensitive to the hadronization model employed.
I will further discuss the prospects of reducing the uncertainty from hadronization by tuning Monte Carlo...
Mr
Sebastian Wild
(Technical University Munich)
6/6/14, 3:45 PM
One key ingredient in the calculation of the antideuteron yield from both dark matter annihilations and cosmic ray spallations is the coalescence model, which is the phenomenological description of the formation of antideuterons from antiproton-antineutron pairs. In this talk, I will discuss the status and challenges of the coalescence model, as well as the resulting uncertainties in the...
Prof.
Kevork Abazajian
(University of California, Irvine)
6/6/14, 4:15 PM
I will give an overview of potential signals from indirect dark matter detection and commensurate constraints, including the cosmic ray positron fraction and gamma rays from the Galactic Center. Both are very statistically significant signals that also have astrophysical interpretations. I will tie in some implications for antideuteron cosmic ray searches.
Prof.
Philip von Doetinchem
(University of Hawaii)
6/6/14, 4:45 PM
Prof.
Philip von Doetinchem
(University of Hawaii)
This talk will give a short overview of experiments other than ALICE and BaBar with capabilities to study antideuteron physics.
