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arXiv · 0907.4158

Direct gamma and gamma-jet measurement capability of ATLAS for Pb+Pb collisions

Mark D. Baker
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Abstract

The ATLAS detector at the LHC is capable of efficiently separating photons and neutral hadrons based on their shower shapes over a wide range in eta, phi, ET, either in addition to or instead of isolation cuts. This provides ATLAS with a unique strength for direct photon and gamma-jet physics as well as access to the unique capability to measure non-isolated photons from fragmentation or from the medium. We present a first look at the ATLAS direct photon measurement capabilities in Pb+Pb and, for reference, p+p collisions at sqrt(sNN)=5.5 TeV over the region |eta|<2.4.

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Mark D. Baker. 2009-09-16. Direct gamma and gamma-jet measurement capability of ATLAS for Pb+Pb collisions. https://doi.org/10.1016/j.nuclphysa.2009.09.040

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