# CHIPP PhD Winter School 2010

17-24 January 2010
Europe/Zurich timezone
Home > Contribution List
Displaying 21 contributions out of 21
Session: Student talks
The general-purpose Belle dectector is located at the KEK $B$ factory (Tsukuba, Japan). This asymmetric $e^+e^-$ collider was designed to produce a large number of $B0$ and $B^+$ meson pairs by running at a center-of-mass energy near the $\Upsilon(4S)$ resonance ($\sqrt s\approx10.58$ GeV). By increasing the energy above the $B_s0\bar B_s0$ threshold, the large potential of the $B$ factories for e ... More
Presented by Remi LOUVOT on 20 Jan 2010 at 16:30
Session: Student talks
ArDM is an experiment for direct detection of weakly interacting massive particles in the universe with a double phase liquid argon calorimeter / TPC. The detector discussed in this talk has a fiducial volume of about 1 ton of liquid argon and the detection is done independently by the collection of ionizing charge as also of scintillation light. In this talk I'll presents an overview over newly b ... More
Presented by Lukas EPPRECHT on 23 Jan 2010 at 10:00
Session: Student talks
on 20 Jan 2010 at 17:30
Session: Student talks
The Compact Muon Solenoid (CMS) experiment is one of the four detectors exploiting the proton- The pixel detector is the innermost detector of CMS that is essential in measuring the trajectories of charged particles with high precision. The detector was installed in summer 2008 and commissioned with cosmic data. First data, arriving at the end of 2009, will be used for further commissioning. In th ... More
Presented by Andreas JAEGER on 24 Jan 2010 at 10:00
Session: Student talks
In this talk I will describe construction and operation of a 3 litre chamber based on the new concept of double phase pure argon Large Electron Multiplier Time Projection Chamber (LAr LEM-TPC): after drifting in liquid argon, the ionization electrons are extracted from the liquid to the vapour phase, where multiplication occurs due to high electric fields in the vicinity of the LEM holes. The mult ... More
Presented by Devis Orlando LUSSI on 23 Jan 2010 at 10:40
Session: Student talks
At the Paul Scherrer Institute (PSI) in Villigen, Switzerland, the construction of a high intensity ultra-cold neutron source is nearing completion. It uses a 1.3 MW proton beam for the production of neutrons in a spallation target. After moderation the UCN enter a ~2 m3 storage volume inside a biological shield. From there they can be transported to the experiments via UCN guides. A detection sy ... More
Presented by Leonard GOELTL on 23 Jan 2010 at 12:10
Session: Student talks
The EXO collaboration aims to detect the neutrino-less double beta decay using xenon isotopically enriched in the isotope 136. R&D is being conducted in Bern, Switzerland, towards the construction of a ton-class detector. A high-resolution micropattern (MicroMegas) readout system is being studied. The scheme offers full tracking capabilities and 3D event reconstruction for possible application in ... More
Presented by Guillaume GIROUX on 23 Jan 2010 at 11:30
Session: Student talks
EXO-200 (Enriched Xenon Observatory - 200kg) is an underground double-beta decay experiment that uses 200kg of Xenon isotopically enriched to 80% in Xenon-136. The Xenon is contained in an ultra-low background TPC where there is simultaneous collection of scintillation light (using Large Area Avalanche Photodiodes (LAAPD’s)) and ionization charge in order to significantly enhance the energy reso ... More
Presented by Martin AUGER on 23 Jan 2010 at 11:50
Session: Student talks
An overview to the alignment of the inner tracker is given together with a brief description of alignment approaches and algorithms used. Results from cosmic runs in 2008 and 2009 will be presented as well as some impacts of alignment to physics analyses.
Presented by Frank MEIER on 21 Jan 2010 at 09:40
Session: Student talks
A study of hadronic event shapes in QCD events at the Large Hadron Collider (LHC) is shown. The study is based on a Geant detector simulation of the Compact are robust under variations of the jet energy scale and resolution effects, which makes them Calorimetric jet momenta are used as input for calculating various event-shape variables, which probe Muon Solenoid (CMS) detector. the structure of t ... More
Presented by Matthias Artur WEBER on 20 Jan 2010 at 16:50
Session: Student talks
Jet veto systematics in the WW decay channel of the Higgs boson search with the CMS experiment. The tt_bar production is contributing a large fraction of the background in the WW channel. It can be drastically reduced with a jet veto. Therefore detailed studies of the jet systematics of the tt_bar pair production and the impact on the Higgs search are needed and will be discussed. These studies ha ... More
Presented by Thomas PUNZ on 20 Jan 2010 at 17:10
Session: Student talks
Preliminary results for the Lorentz angle in the silicon barrel pixel detector of the CMS experiment are presented. Two different methods are used to extract the Lorentz angle from the first LHC collision data and from cosmic data.
Presented by Mirena Ivova RIKOVA on 21 Jan 2010 at 09:20
Session: Student talks
We analyse CMB data in a manner which is as model-independent as possible. We encode the effects of late-time cosmology into a single parameter which describes the distance to the last scattering surface, similar to the shift parameter, and exlude low multipoles, up to l 40 from the analysis. We consider the WMAP five-year as well as ACBAR 2008 observations. We obtain constraints on !b, !m and n ... More
Presented by Marc VONLANTHEN on 20 Jan 2010 at 15:00
Session: Student talks
The (planned) SLHC upgrade will make it necessary to handle up to 10 times higher muon rates. For this purpose the development of additional sub-detectors is needed. One option would be the use of fast scintillation detectors as muon taggers for a L1 trigger support. Because of the high B-field and the strongly limited space, it seems evident to use SiPMs as readout devices. Simulations and protot ... More
Presented by Paul PAPACZ on 21 Jan 2010 at 09:00
Session: Student talks
I will briefly review the current status of magnetic field observations in galaxies and clusters. These experimental observations can be explained assuming that the primordial Universe was permeated by a seed magnetic field. Several mechanisms have been proposed to generate such a primordial field. I will explain how to obtain usefull constraints on the amplitude of seed magnetic fields by stu ... More
Presented by Elisa FENU on 20 Jan 2010 at 15:40
Session: Student talks
Generic signatures of supersymmetry with R-parity conservation include same-sign isolated dielectron pairs, accompanied by energetic jets and missing transverse energy. The detection of these signatures relies on the observation of an excess of events over Standard Model background expectations. In this study we present different methods to control and estimate Standard Model backgrounds for same- ... More
Presented by Predrag MILENOVIC on 20 Jan 2010 at 18:00
Session: Student talks
Towards the end of 2009 the first collisions are expected to take place at the Large Hadron Collider at CERN. After about four years of operation, the accelerator will be upgraded to the so-called Phase 1: a peak luminosity of 2x10^34 cm^(-2)s^(-1) is expected, resulting in an increase by a factor of two with respect to the initial specifications. In this occasion, the CMS pixel detector will be r ... More
Presented by Carlotta FAVARO on 24 Jan 2010 at 10:20
Session: Student talks
The XENON100 detector, which has replaced the XENON10 prototype in the same shield and location at the Gran Sasso Undergound Laboratory, is a dual phase (liquid-gas) xenon time-projection chamber for particle detection. The total amount of liquid xenon is 165 kg, of which 65 kg are in the active target enclosed in a teflon/copper structure, the rest being in the surrounding active veto. The direc ... More
Presented by Alexander KISH on 23 Jan 2010 at 10:20
Session: Student talks
The formation and evolution of low-mass stars within dense halos of dark matter (DM) leads to evolution scenarios quite different from the classical stellar evolution. For high DM densities, these stars stop their gravitational collapse before reaching the main sequence. Such stars remain indefinitely in an equilibrium state with lower effective temperatures, the annihilation of captured DM partic ... More
Presented by Jordi CASANELLAS on 20 Jan 2010 at 15:20
Session: Student talks
on 24 Jan 2010 at 10:40
Session: Student talks
To recognise supersymmetric decays or other rare processes, the standard model background for these signatures have to be predicted as precisely as possible. At the CMS experiment the reference analysis 2 is looking for supersymmetry in the purely hadronic channel. In this talk a data driven background estimate to this analysis for the ttbar and W+jet channel with muons or electrons in the final s ... More
Presented by Jan Detlef THOMSEN on 20 Jan 2010 at 17:40