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Project List » ATLAS Experiment at LHC:beginning of data taking

ATLAS Experiment at LHC:beginning of data taking
Extended website: http://www.nipne.ro/dpp/Collab/ATLAS/15EU-ATLAS-web/15EU-ATLAS/index.htm

Acronym: ATLAS
Contracting Authority: Executive Agency for Higher Education, Research, Development and Innovation Funding (UEFISCDI)
Number / Date of the contract: 15 EU / 06.04.2009
Project Manager: Sanda Dita
Partners: 1. National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca 2. University Polithehnica of Bucharest
Starting date / finishing date: 2009-04-06 / 0000-00-00
Project value: 1219900 RON
Abstract: ATLAS is a particle physics experiment that will exploit at maximum the discovery potential of LHC. The main goals of the ATLAS programme include precise measurements of the Standard Model (SM) parameters but also search for new phenomena. The nucleus-nucleus collisions at the LHC energy will provide a useful opportunity to study the properties of strongly interacting matter at extreme energy density, including the possible phase transition to a colour deconfined state, the quark gluon plasma.
The discovery of Higgs boson, predicted by the SM to explain the electroweak symmetry breaking, has been used as a benchmark to establish the performance of the detector. The ATLAS experiment will search for Higgs boson predicted by SM in the full mass interval up to 1 TeV, taking into account various mechanisms for its production and decay. Searches for Higgs bosons beyond the SM, the Higgs bosons predicted by the Minimal Supersymmetric Standard Model in the full parameter space are also among the main goals of ATLAS.
The search for new particles, superpartners of the already known particles is an important objective of the ATLAS physics programme. Supersymmetry is a very interesting theoretical concept as it offers the only presently known mechanism for incorporating gravity in the quantum theory of particle interactions, and postulates the existence of a high number of new particles, superpartners for all the presently observed particles. Thus, there are predictions about the bosonic superpartners of fermions - squarks and sleptons - and the fermionic superpartners of bosons – gluinos and gauginos. ATLAS is also searching for new quark and lepton families as well as for new heavy gauge bosons with masses much higher than the masses of W and Z bosons.
The high energy domain, available at LHC, allows searching for signatures characterizing quark compositeness, a very important and fundamental question. New models propose the existence of extra dimensions leading to a characteristic energy scale of quantum gravity in the TeV region. The emission of gravitons which escape into extra dimensions generating high missing transverse energy or Kaluza-Klein excitations which manifest as Z-like resonances with ~ TeV separations in mass are predicted and will be searched in ATLAS.
LHC being a top factory with a production of 8 millions of top-antitop pairs in a year, even at low luminosity, will allow systematic studies of top quark properties and comparison of the SM predictions with precise measurements involving the top quark.
The high rate of B particle production at LHC provides very good conditions for CP symmetry violation studies and allows a complex study of B meson physics.


1. Phenomenological studies concerning precise predictions in Standard Model and its extensions (2009-06-30)
2. Monitoring the functionality of Tilecal-ATLAS calorimeter in the interval March-September 2009 (2009-09-30)
3. Monitoring the functionality of Tilecal-ATLAS calorimeter in the interval September-December 2009 (2009-12-10)

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