Photon-induced Background for Dilepton Searches and Measurements in pp\n Collisions at 13 TeV Article Swipe
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· 2016
· Open Access
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· DOI: https://doi.org/10.48550/arxiv.1606.00523
· OA: W4300505413
The production of high invariant mass opposite sign lepton pairs in\nproton-proton collisions at the LHC is dominated by the Drell-Yan process. In\naddition to this photon or Z exchange mediated mechanism, gamma-gamma\ncollisions, where photons radiated by the incoming protons collide, can produce\nlepton pairs. This is an important additional source of background for high\nmass resonant (like Z') or non-resonant (like contact interactions) searches.\nIn this paper detailed calculations of the Drell-Yan and photon-induced cross\nsections in the typical acceptance of a multi-purpose LHC detector at center of\nmass energy 13 TeV are presented. The hint for a diphoton excess at a mass\naround 750 GeV, reported by the ATLAS and CMS experiments from the analysis of\nthe 2015 data at 13 TeV, raises the possibility that such an excess could be\nproduced through gamma-gamma collisions. A good theoretical understanding and\nmeasurements in the dilepton channels at these energies can help to elucidate\nthis production hypothesis.\n
