THEME02-0-1007-94/2005

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02-0-1007-94/2005

Priority:

Status:

Approved for completion
in 2005

A T L A S
General-purpose pp Experiment at CERN's
Large Hadron Collider

Leader:

N.A. Russakovich

Scientific Programme:
The ATLAS Collaboration prepares a general-purpose pp experiment which would be operational at the start-up of the Large Hadron Collider (LHC) in order to exploit its full discovery potential. The LHC offers a large range of physics opportunities, among which the origin of mass at the electroweak scale is a major focus of interest. The detector optimization is therefore guided by physics issues such as sensitivity to the largest possible Higgs mass range, but also, for example, by detailed studies of very high multiplicity physics and of top quark decays, supersymmetry searches, and sensitivity to large compositeness scales. The ability to cope with a broad variety of expected physics processes also demonstrates most importantly the detector's potential for unexpected new physics.
Many of the interesting physics questions at the LHC require high luminosity, and so the primary goal of the experiment is to operate at the standard high luminosity for the LHC of 1.7· 10 ³⁴cm ^-2 s ^-1 with a detector that provides as many signatures as possible of new physics using electron, gamma, muon, jet, and missing transverse energy measurements.
Emphasis is also placed on the performance necessary for physics accessible during the initial lower luminosity running. The experiment will address more complex signatures including tau detection and heavy flavour tags to as high a luminosity as practicable.
Finally, for a restricted set of signatures, the detector is conceived for safe performance even at the highest possible luminosities which could be delivered by the LHC.

Expected main results in 2005:

Further production of muon chambers. Chambers testing and starting of assembly of the muon spectrometer.
Tile calorimeter and LAr end-cap modules calibration. Software development for particles and jets energy reconstruction in the ATLAS detector. Assembly of calorimeters in the ATLAS pit with high-precision metrological support.
Further production and testing of the transition radiation tracker (TRT) elements.
Development and tests of the common software on the computing form at LIT JINR.
Simulation of a number of final states in the ATLAS detector. Development of new proposals to the ATLAS physics program.

List of projects:
	Project	Leader	Priority (period of realisation)
1.	ATLAS	N.A. Russakovich	1 (1995-2005)

Collaboration
Country or international organization	City	Institute or Laboratory
Armenia	Yerevan	YerPhI
Azerbaijan	Baku	IP ANAS
Belarus	Minsk	IP NASB
		BSU
		NC PHEP BSU
		ISSP NASB
		RINP BSU
	Gomel	GSTU
Canada	Vancouver	TRIUMF
	Montreal	UdeM
CERN	Geneva
Czech Republic	Prague	CU
France	Clermont-Ferrand	LPC-CF
	Orsay	LAL
Georgia	Tbilisi	HEPI TSU
Germany	Munich	MPI-P
Greece	Athens	Univ.
Israel	Rehovot	WIS
Italy	Pisa	Univ.
The Netherlands	Amsterdam	NIKHEF
Russia	Moscow	LPI RAS
		MEPhI
		SSC-ITEP
		CC RAS
		MSU
	Protvino	SRC-IHEP
Slovak Republic	Bratislava	CU
		IP SAS
Spain	Barcelona	IFAE
The USA	Argonne, IL	ANL
Uzbekistan	Samarkand	SSU

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A T L A S General-purpose pp Experiment at CERN's Large Hadron Collider

A T L A S
General-purpose pp Experiment at CERN's
Large Hadron Collider