Prospectives of the hadron program in ATLAS

on behalf; of the; ATLAS collaboration

doi:10.1088/1674-1137/34/9/042

Chinese Physics C> 2010, Vol. 34> Issue(9) : 1360-1363 DOI: 10.1088/1674-1137/34/9/042

Prospectives of the hadron program in ATLAS

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Abstract：
One of the first measurements that will be made at the LHC by ATLAS deals with the
properties of inelastic collisions, namely the central charged particle density and transverse momentum distributions. Current predictions of these distributions have large uncertainties in the LHC energy range. We describe the ATLAS minimum bias triggers, designed to select all kind of inelastic interactions, and the performance of the track reconstruction software which was adapted to soft particle track reconstruction. The precision with which the minimum bias distributions can be measured with early data is presented and the uncertainties on the inelastic distributions due to trigger bias is discussed.

References

[1]

. The ATLAS collaboration, Expected Performance ofthe ATLAS Experiment, Detector, Trigger and Physics,CERN-OPEN-2008-020, Dec. 20082. Sjostrand T, Mrenna S, Skands P Z. JHEP, 2006, 0605:0263. Engel R. PHOJET manual (ver. 1.05c, June 1996)4. Aaltonen T et al [CDF collaboration]. Phys. Rev. D, 2009,79: 112005 [arXiv:0904.1098 [hep-ex]]5. Technical Design Report, ATLAS High-Level Trigger Data Aquisition and Controls, CERN/LHCC/2003-22, ATLASTDR 016, 30 June 20036. Inner Detector Technical Design Report, ATLAS TDR 5,CERN/LHCC/97-17, ISBN 92-9083-103-0, 30. April 19977. Moraes A, Buttar C, Clements D. CERN-ATL-PHYS-PUB-2005-0158. Hara K. ATLAS collaboration. This conference

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on behalf, of the and ATLAS collaboration. Prospectives of the hadron program in ATLAS[J]. Chinese Physics C, 2010, 34(9): 1360-1363. doi: 10.1088/1674-1137/34/9/042

on behalf, of the and ATLAS collaboration. Prospectives of the hadron program in ATLAS[J]. Chinese Physics C, 2010, 34(9): 1360-1363. doi: 10.1088/1674-1137/34/9/042 shu

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Received: 2010-03-04
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Prospectives of the hadron program in ATLAS

Received Date: 2010-03-04
Accepted Date: 1900-01-01
Available Online: 2010-09-05

Abstract:

One of the first measurements that will be made at the LHC by ATLAS deals with the
properties of inelastic collisions, namely the central charged particle density and transverse momentum distributions. Current predictions of these distributions have large uncertainties in the LHC energy range. We describe the ATLAS minimum bias triggers, designed to select all kind of inelastic interactions, and the performance of the track reconstruction software which was adapted to soft particle track reconstruction. The precision with which the minimum bias distributions can be measured with early data is presented and the uncertainties on the inelastic distributions due to trigger bias is discussed.