|
|
Date |
|
||
|
September
2011 |
|||
|
9/08/2011 |
Karl Giboni (Shanghai Jiao Tong
University) “Panda-X – A New Detector for Dark Matter Search” With the XENON100 and the XMAS experiments taking data, the Dark Matter Search field is preparing for the next generation of experiments. There will be an additional project, Panda-X. This project started last year to bring a sizeable LXe dual phase detector to work in the just finished Jin Ping laboratory in southern China, Szechuan province. In the initial implementation the mass will be about 25 kg of xenon after a 5 cm all around fiducial cut. The detector is housed in a passive lead/poly shield. The shield, but also the detector vessels are dimensioned sufficient for a future version. The great depth (7500 m.w.e.) of the lab reduces the background to a level which does not require an external muon veto any longer. The TPC is optimized towards high light yield for a low trigger threshold, and a high drift field for enhanced gamma ray discrimination. The design is completed, and all major parts are ordered or have already been received. Presently we set up a full-scale test module in our lab in Shanghai. |
||
|
9/12/2011 |
Andre
de Gouvea (Northwestern
University), neutrino physics "Looking for
The Origin of Neutrinos Masses: from neV to YeV" |
||
|
9/19/2011 |
Reina Maruyama (U of Wisconsin), DM-Ice DM-Ice: a direct detection experiment for dark matter at the South
Pole I will
describe DM-Ice, a direct detection dark matter experiment at the South Pole.
The aim of the experiment is to test the
claim for an observation of dark
matter by the DAMA collaboration by carrying out an experiment with the same
detector technology, but in the southern hemisphere. By going to the
opposite hemisphere, many of the suspected backgrounds would produce annual
modulation with the opposite phase whereas the dark matter signature should
stay the same. DMIce-17, a 17-kg
detector was installed in the Antarctic ice at the South Pole in December 2010 at the depth of ~2200 m.w.e. and is currently taking data. A 250-kg scale
experiment that can test DAMA's claim is currently being designed. I will report on the status of DMIce-17
and the plans for the 250 kg-scale experiment. |
||
|
9/26/2011 |
Jianming Qian
(University of Michigan) Higgs boson search at ATLAS |
||
|
October 2011 |
|||
|
10/04/2011 |
Eva Halkiadakis
(Rutgers University) Searches for Hadronic Resonances at CDF and CMS Most searches for
new physics at high energy hadron colliders use
signatures that require leptons, photons, or missing transverse energy in
order to suppress backgrounds from QCD. I will present two searches
for new physics in an entirely hadronic
channel with no MET signature using data collected with the CDF detector
at Fermilab and the CMS detector at
CERN. They represent the first dedicated model independent
searches for three-jet hadronic resonances in a multijet environment. These
searches utilizes a novel approach: an ensemble of all possible jet
triplets within an event consisting of at
least six jets is used to extract a signal from the multijet QCD backgrounds. In both analyses, the
number of
expected standard model background events is found to be in good
agreement with the observed events. Limits on the cross
section times branching ratio are set in a model of gluino pair
production with an R-parity-violating decay to three quarks. |
||
|
10/10/2011 |
Daniel Whiteson (UC Irvine) A Year of
Searching the Energy Frontier with ATLAS The
Large Hadron Collider's first year of proton
collisions at 7 TeV has opened a virgin energy
territory to exploration. I will discuss a strategy for searching the
new territory for unexpected new particles or interactions. I will present
recent results from the ATLAS experiment, focussing
on events with four or more charged leptons. |
||
|
10/17/2011 |
Lei Xia
(Argonne Lab) Imaging
Calorimeter for the Future Lepton Collider Particle
Flow Algorithms (PFAs) have been applied to existing detectors to improve the
measurement of hadronic jets in colliding beam
experiments. For future experiments, such as a TeV
lepton collider, detector concepts optimized for the application of PFAs are
being developed. These concepts require so-called imaging calorimeters, with
unprecedented granularity. I will review the various recent developments
of such highly granular calorimeters. |
||
|
10/24/2011 |
Mark Devlin
(University of Pennsylvania) Where Did Half the Starlight in the
Universe Go? We believe that
approximately half of all the light from stars is absorbed and reprocessed by
dust. The resulting emission is grey body with a temperature near 30 Kelvin.
The COBE satellite made the first measurements of the resulting Far Infrared
Background (FIRB), but since that time, we have been unable to resolve the
background into individual galaxies. The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) was designed to do this
job. Its three bands at 250, 350, and 500 microns span the peak in emission
for galaxies at z=1. I will discuss the BLAST experiment and present results
from our measurements of resolved and unresolved galaxies. |
||
|
10/31/2011 |
|||
|
November 2011 |
|||
|
11/7/2011 |
Elke-Cariline Aschenauer (Brookhaven Lab) Spin physics - results from RHIC and future research |
||
|
11/14/2011 |
Christian Reichardt (UC Berkeley) Probing reionization and large-scale structure with the South
Pole Telescope |
||
|
11/21/2011 |
Tanya Rindler-Daller (U of Texas) |
||
|
11/28/2011 |
Natalia
Panikashvili (U of Michigan) |
||
|
December 2011 |
|||
|
12/05/2011 |
Aurelio
Juste (IFAE) Searches for the
Higgs boson at the Tevatron |
||
|
12/12/2011 |
Jim
Buckley (Washington University) Detector Technology for Indirect and Direct
Detection of Dark Matter A comprehensive
program for detecting and identifying dark matter should include both direct
and indirect detection experiments. Direct detection techniques can provide
important upper limits, but very clean discrimination of nuclear recoil
events and good statistics are required to distinguish dark matter from
background and to constrain the dark matter properties. If dark matter is a
thermal relic like the neutralino, future gamma-ray
searches could perform particle identification through measurements of the
annihilation spectrum, and measurements of the halo distribution by imaging
the central halos of nearby galaxies. I will discuss some of the
technical drivers for both approaches, and how these are shaping the design
of next generation experiments. For indirect detection, I will describe
the design requirements for a next-generation gamma-ray observatory (e.g.,
CTA or a future space-based pair telescope). UV-blue sensitive
photon-counting detectors are a key enabling technology for both ground-based
gamma-ray experiments as well as liquid-nobel
direct detection experiments. I will describe work by the Washington
University group on the development of crystalline and amorphous AlGaN-InGaN photocathodes and
solid state detectors as well as the design of very low background PMTs. |
||
|
12/19/2011 |
Jadranka Sekaric (U
of Kansas) The measurement of WW and WZ
production in W + jets final states
and study of the dijet invariant mass distribution
at D0 experiment |
||