Improved luminosity determination in pppppp collisions at √s = 7 TeV using the ATLAS detector at the LHC

Aad, G. and Abajyan, T. and Abbott, B. and Abdallah, J. and Khalek, S. A. and Abdelalim, A. A. and Abdinov, O. and Aben, R. and Abi, B. and Abolins, M. and AbouZeid, O. S. and Abramowicz, H. and Abreu, H. and Acerbia, E. and Acharya, B. S. and Adamczyk, L. and Adams, D. L. and Addy, T. N. and Adelman, J. and Adomeit, S. and Adragna, P. and Adye, T. and Aefsky, S. and Aguilar-Saavedra, J. A. and Agustoni, M. and Aharrouche, M. and Ahlen, S. P. and Ahles, F. and Ahmad, A. and Ahsan, M. and Krasznahorkay, Attila and Pásztor, Gabriella and Tóth, József (2013) Improved luminosity determination in pppppp collisions at √s = 7 TeV using the ATLAS detector at the LHC. EUROPEAN PHYSICAL JOURNAL C, 73 (8). ISSN 1434-6044

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Abstract

The luminosity calibration for the ATLAS detector at the LHC during pp collisions at √s = 7 TeV in 2010 and 2011 is presented. Evaluation of the luminosity scale is performed using several luminosity- sensitive detectors, and comparisons are made of the long-term stability and accuracy of this calibra- tion applied to the pp collisions at √s = 7 TeV. A luminosity uncertainty of δ L /L = ±3.5% is obtained for the 47 pb−1 of data delivered to ATLAS in 2010, and an uncertainty of δ L /L = ±1.8% is obtained for the 5.5 fb−1 delivered in 2011.

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