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Agenda
for the plenary workshop sessions in Dark Matter.
All links marked with a⇓ can be used to show/hide the abstracts and presentations.
Click here to show/hide all presentations and abstracts and here for a print version.
You may also download the compact program booklet (PDF, 1.9 MB)
and an abstract booklet (PDF, 0.4 MB).
As long as authors provided us with PDF versions of their slides, the corresponding downloads are available on this page.
Monday – Sep 5, 2011
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10:10 – 10:45 |
Dark Matter I
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Plenary Session (Festsaal) – Chair:
Georg Raffelt
10:10
(25' + 10')
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Alternatives to WIMPs and alternative uses of WIMP detectors⇓
slides
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Maxim Pospelov (University of Victoria and Perimeter Institute)
Although perfectly motivated, WIMP dark matter candidates do not exhaust even a small fraction of dark matter particle mass/couplings. Over the years, a number of appealing alternatives has been developed by the theory community. These include superweakly interacting particles such as sterile neutrinos, and hidden vectors and scalars; supercold dark matter such as axions, as well as even more exotic possibilities. After reviewing a fraction of these ideas, I will concentrate on alternative uses of WIMP dark matter detectors and show how their results can be interpreted as constraints on properties of super-WIMPs, solar axions and solar neutrinos.
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11:15 – 11:50 |
Dark Matter II
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Plenary Session (Festsaal) – Chair:
Takaaki Kajita
11:15
(25' + 10')
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Status of indirect detection⇓
slides
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Pasquale Serpico (LAPTh)
I will review the status of indirect detection of dark matter (charged cosmic rays, gamma rays, neutrinos, cosmology), which remains a cornerstone for the dark matter particle identification program. I will stress the importance of accounting for astrophysical backgrounds, especially when moving from setting constraints in parameter space to the more challenging ambition of detection. I will argue that, barring some exception, we are close to the limits of blind searches for indirect dark matter evidence due to systematic limitations to our understanding of astrophysical backgrounds. Guidance from collider/direct detection is needed to perform a much more fruitful "a priori" search for correlated signatures in many indirect channels.
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Tuesday – Sep 6, 2011
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09:00 – 10:35 |
Direct Dark Matter Searches I
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Plenary Session (Festsaal) – Chair:
Alessandro Bottino
09:00
(25' + 10')
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Direct WIMP searches and theoretical scenarios⇓
slides
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Carlos Muñoz (Universidad Autónoma Madrid UAM & Instituto de Fisica Teorica UAM/CSIC)
Theoretical models and WIMP candidates for dark matter will be discussed in the light of recent experimental results.
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09:35
(20' + 10')
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Status of XENON100⇓
slides
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Rafael Lang (Purdue University)
XENON100 is a two-phase time projection chamber with a 62kg liquid xenon target to search for Dark Matter interactions. Both scintillation and ionization signals are recorded to allow interaction vertex reconstruction in three dimensions. Fiducialization of the target volume results in the lowest background level of any Dark Matter search running. In a 48kg fiducial target and 100 days of live time, no evidence for Dark Matter is found. This allows to place some of the strongest limits on Dark Matter interactions. The XENON100 detector is presented together with latest results from the search for Dark Matter.
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10:05
(20' + 10')
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Dark matter search with CDMS and SuperCDMS⇓
slides
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Wolfgang Rau (Queen's University)
The CDMS experiment operated cryogenic Ge and Si detectors for several years in a well shielded underground environment searching for signals from Weakly Interacting Massive dark matter Particles (WIMPs). Due to the low background and excellent background discrimination power, CDMS has provided the best sensitivity for WIMP-nucleon interactions for most of the past decade.
New detectors with larger mass and further improved background discrimination, developed for the successor experiment SuperCDMS, are currently being studied; WIMP search measurements are foreseen to resume later this year.
We will discuss the results from CDMS, in particular the constraints on low mass WIMPs recently proposed to explain results from other dark matter experiments, and present the status of SuperCDMS.
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11:00 – 13:00 |
Direct Dark Matter Searches II
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Plenary Session (Festsaal) – Chair:
Lothar Oberauer
11:00
(20' + 10')
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Latest results from the CRESST dark matter search⇓
slides
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Federica Petricca (MPI für Physik)
The CRESST-II experiment is searching for Dark Matter particles in the form of WIMPs via their elastic scattering off nuclei in a target material. The CRESST target consists of scintillating CaWO4 crystals which are operated as cryogenic calorimeters. For each interaction a phonon signal in the target crystal and the scintillation light produced are measured.
In the talk we present the latest results of the experiment, obtained from a net exposure of 734kg days acquired with 9 detectors between July 2009 and January 2011. The data has shown a considerable number of oxygen recoil candidates in our signal region which is difficult to explain by known backgrounds. We discuss the significance of this excess of events over the known backgrounds and the compatibility with a WIMP signal.
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11:30
(20' + 10')
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CoGENT and COUPP⇓
slides
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Juan Collar (University of Chicago)
Recent results from CoGeNT will be discussed. Sources of uncertainty affecting searches in principle sensitive to low mass WIMPs will be considered, in particular any irreducible surface event contamination in CoGeNT PPCs and those arising from quenching factor and the possibility of channeling in NaI[Tl]. Preliminary results from a measurement of ion channeling in NaI[Tl] at energies relevant for dark matter searches will be presented, concluding with an overview of the present landscape of experimental constraints and anomalies affecting searches for few-GeV WIMPs. The status of COUPP will be briefly discussed, and plans for both CoGeNT and COUPP will be mentioned.
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12:00
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EDELWEISS status report⇓
slides
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Eric Armengaud (IRFU/SPP)
The EDELWEISS-II experiment, operated at the Frejus laboratory in a low-background environment, uses cryogenic germanium detectors to look for WIMPs. We present the results of a WIMP search carried out recently with ten so-called InterDigit detectors. This technology enables a high level of gamma radioactivity rejection within a controled fiducial volume. A cross-section of 4.4×10-8 pb could be excluded for a WIMP mass of 85 GeV. We also present the status of the EDELWEISS-III project, which will operate 40 newly-designed FID detectors in an upgraded installation to improve significantly the sensitivity to low WIMP scattering cross-sections.
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12:30
(20' + 10')
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DAMA/LIBRA results and perspectives⇓
slides
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Antonella Incicchitti (INFN Roma)
The DAMA/LIBRA set-up (about 250 kg highly radiopure NaI(Tl)) is running at the Gran Sasso National Laboratory of the I.N.F.N..
The results obtained in 6 annual cycles have been already released; the cumulative exposure with the former DAMA/NaI data is 1.17 ton x yr, corresponding to 13 annual cycles. The data further
confirm the model independent evidence for the presence of Dark Matter particles in the galactic halo on the basis of the Dark Matter annual
modulation signature (8.9 sigma C.L.). A further annual cycle has been collected before the new upgrading performed at the end of 2010.
The set-up has now started the data taking
and optimizations in this new configuration.
Results and perspectives will be summarized.
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Updated 4 August 2012
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