|
|
IIHE Seminars in 2009-2010 |
| 18th June 2010 |
Supernova Detection with the AMANDA/IceCube neutrino telescopes
| talk in pdf
|
| 14:00 |
Dr. Thomas Kowarik (Physics Institute, Mainz University, Germany)
|
|
Abstract:
The core collapse of a massive star in the Milky Way is likely to produce a neutrino burst that is sufficiently intense to be registered by the AMANDA and IceCube neutrino telescopes. Different supernova models as well as the impact of neutrino oscillations will be discussed in view of their signatures in IceCube and some preliminary results will be shown for the 9 year AMANDA supernova search.
|
| 08th June 2010 |
The heavy ions program of the CMS experiment
| talk in pdf
|
| 14:00 |
Dr. Raphael Granier de Cassagnac (LLR - Ecole Polytechnique, Paris, France )
|
|
Abstract:
I present the capabilities of the CMS experiment to explore the heavy-ion physics program offered by the CERN Large Hadron Collider (LHC). Collisions of lead nuclei at energies up to sqrt{s_{NN}} = 5.5 TeV will probe quark and gluon matter at unprecedented values of energy density. The prime goal of this research is to study the fundamental theory of the strong interaction (QCD) in extreme conditions of temperature, density and parton momentum fraction. I give the overview of the potential of CMS to carry out a full set of representative Pb-Pb measurements both in "soft" and "hard" regimes.
Measurements include "bulk" observables -- charged hadron multiplicity, low pT inclusive hadron identified spectra and elliptic flow -- which provide information on the collective properties of the system; as well as perturbative processes -- such as quarkonia, heavy-quarks, jets, gamma-jet, and high pT hadrons --- which yield "tomographic" information of the hottest and densest phases of the reaction. In addition, the corresponding measurements that have been performed on early p+p collision data will be reviewed.
|
| 28th May 2010 |
Decisive results of the BABAR experiment
| talk in pdf
|
| 11:00 |
Prof. Jacques Chauveau (LPNHE Universite Pierre et Marie Curie, Paris-VI, France)
|
|
Abstract:
The BABAR experiment installed on the PEP-II B-factory at SLAC (Stanford Linear Accelerator National Laboratory) has taken data from 1999 until April 7, 2008. The main result of BABAR and the competing experiment Belle on KEK-B in Japan is the establishment of CP-violation in the b-quark decays. The wealth of all measurements since then is the foundation of the Cabibbo Kobayashi and Maskawa (CKM) model as the sector of the electroweak standard model which describes the quark flavors. Furthermore, at the electron-positron collision energies of the B-factories, a rich collection of results have been obtained about charm (D- mixing), tau leptons, quarkonia (the eta_b discovery, and new charmonium states) as well as at lower energy by using the initial state radiation. I will summarize the confrontation between experiments and the standard model for these topics and try to give an idea of the room left for new physics at a time when LHC has started and new projects are being prepared.
|
| 29th April 2010 |
High energy scattering at strong coupling from AdS/CFT: Progress and perils
| talk in pdf
|
| 14:00 |
Dr. Edmond IANCU (Service de Physique Theorique CEA/DSM/Saclay, Paris, France)
|
|
Abstract:
Motivated by the experimental results at RHIC, which suggest that the deconfined QCD
matter (`quark-gluon plasma') produced in the intermediate stages of a heavy ion collision
might be strongly interacting, there is currently a large effort towards understanding
high energy scattering at strong coupling using string theory methods, via the AdS/CFT
correspondence. In my talk, I will briefly review the experimental evidence at RHIC and
then focus on the recent theoretical progress. I will describe the peculiar parton structure
which emerges at strong coupling together with its consequences for high energy scattering.
I will explain the danger with using such results outside of the context of heavy ion collisions.
|
| 25th March 2010 |
Synchrotron light sources in Trieste and Data analysis in the Pierre Auger Observatory
| talk in pdf
|
| 14:00 |
Dr. Sophie FERRY (Sincrotrone Trieste, Italy)
|
|
Abstract:
Elettra is a storage ring synchrotron light facility in Trieste. It has been upgraded with a booster allowing to operate in top-up mode. After a short introduction, I will present the studies to verify that no radioprotection hazard could occur while operating. A side of elettra, Fermi, a Free Electron Light source is being build and commissioned. I will review the current stage of the project and a new twiss parameter measurement tool.
The second part of the talk will be about ultra-high energy cosmic rays. I will present the Pierre Auger Observatory (PAO) and the data analysis I performed in its early stage of data taking. It includes various methods to search for anisotropies and to find correlation with extra-galactic sources. The PAO recent results will be also presented.
|
| 12th March 2010 |
Recent developments in laser wakefield acceleration
| talk in pdf
|
| 11:00 |
Dr. Arnd SPECKA (Laboratoire Leprince-Ringuet, Ecole Polytechnique CNRS/IN2P3, France) |
|
Abstract:
Strong plasma waves created by high-intensity, ultra-short laser pulses exhibit a longitudinal electric field suitable for the accelaration of electrons at high gradients up to tens of GV/m. Although this technique is still far away from being employed on a realistic accelerator, recent developments have demonstrated many promising features, among which a good "beam" quality. We will report on recent progress in this field and discuss the future challenges in the context of future laser installations.
|
| 10th December 2009 |
Radio detection of Neutrino above 10^22 eV from the Westerbork Synthesis
Radio Telescope (WSRT) and LOFAR
| talk in pdf
|
| 15:30 |
Dr. Kalpana SINGH (KVI Institute, Groningen, Netherlands) |
|
Abstract:
Ultra-High Energy Cosmic Ray particles (UHECR) are known to reach
energies at least up to 10^20 eV, providing potential insight into physics that
cannot be studied by current or upcoming particle accelerators. However,
those particles are extremely rare and large natural detector volumes are
needed to detect them. Here radio detection techniques provide interesting
possibilities. Particle cascades initiated by ultrahigh energy neutrinos in the
lunar regolith will emit an electromagnetic pulse with a time duration of the
order of nanoseconds through a process known as the Askaryan effect. It has
been shown that in an observing window around 150 MHz there is a
maximum chance for detecting this radiation with radio telescopes commonly
used in astronomy. In 50 hrs of observation time with the Westerbork
Synthesis Radio Telescope array we have set a new limit on the flux of
neutrinos, summed over all flavors, with energies in excess of 4*10^22 eV
which is almost an order of magnitude lower than the current limit set by
FORTE. In addition LOFAR will be able to observe the moon with high
sensitivity by forming several independent tied array beams to cover the
moons surface. This will give it unprecedented sensitivity to UHECR above
10^20 eV and it will be able to lower down flux limit further by at least one
or two order of magnitude.
|
| 30th October 2009 |
Radio Detection of Cosmic Ray Air Showers and Neutrinos
| talk in pdf
|
| 14:00 |
Dr. John KELLEY (Radboud University, Nijmegen, Netherlands) |
|
Abstract:
The use of radio techniques in particle astrophysics is undergoing a renaissance, setting the stage for the next generation of cosmic ray and neutrino experiments. In particular, detection of nanosecond-timescale radio pulses from cosmic ray air showers has already been demonstrated by the LOPES, MAXIMA, and CODALEMA experiments. I will discuss the most recent results regarding this radio emission, as well the status of AERA, the Auger Engineering Radio Array to be co-located with the Pierre Auger Observatory in Argentina. In addition to providing much-needed information on open questions of cosmic ray primary composition, radio methods also offer a scalable platform for next-generation neutrino detectors, leading to a measurement of the cosmogenic (GZK) neutrino flux.
|
Past seminars in:
[2003-2004]
[2004-2005]
[2005-2006]
[2006-2007]
[2007-2008]
[2008-2009]
|
