Jun 10 – 15, 2019
Marmara University Sultanahmet Campus
Europe/Istanbul timezone

First evidence of single top production in association with a photon in proton-proton collisions at \sqrt{13} TeV

Jun 10, 2019, 10:50 AM
Marmara University Sultanahmet Campus

Marmara University Sultanahmet Campus



Seyed Mohsen Etesami (Institute for Research in Fundamental Sciences (IR))


In this analysis, the first evidence of events consistent with the production of a single top quark in association with a photon is reported. The analysis is based on proton-proton collisions at s√= 13 TeV and recorded by the CMS experiment in 2016, corresponding to an integrated luminosity of 35.9 fb−1. Events are selected by requiring the presence of a muon (μ), a photon (γ), an imbalance in transverse momentum from an undetected neutrino (ν), and at least two jets (j) of which exactly one is identified as associated to the hadronization of a b quark. An excess above the background-only hypothesis is observed, with a significance of 4.4 standard deviations, which is consistent with the SM prediction

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