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Measurement of the Z γ → ν ν ¯ γ $$ Z\gamma \to \nu \overline{\nu}\gamma $$ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector and limits on anomalous triple gauge-boson couplings

CollaborationWith : Akilli, Ece / Amrouche, Cherifa Sabrina / Ancu, Lucian Stefan / Benoit, Mathieu / Calace, Noemi / Clark, Allan Geoffrey / Della Volpe, Domenico / Di Bello, Francesco / Dubreuil, Arnaud / Ferrere, Didier / Gadatsch, Stefan / Golling, Tobias / Gonzalez Sevilla, Sergio / Iacobucci, Giuseppe / Iizawa, Tomoya / Jansky, Roland / Khoo, Teng Jian / Kiehn, Moritz / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nessi, Marzio / Paolozzi, Lorenzo / Poggi, Riccardo / Raine, Johnny / Salamani, Dalila / Schramm, Steven / Sfyrla, Anna / Sultan, D M S / Valente, Marco / Vicente Barreto Pinto, Mateus / Wu, Xin / Zaffaroni, Ettore
Published in Journal of High Energy Physics. 2018, vol. 1812, p. 010
Collection Open Access - SCOAP3
Abstract The production of Z bosons in association with a high-energy photon ( Zγ production) is studied in the neutrino decay channel of the Z boson using pp collisions at √s = 13 TeV. The analysis uses a data sample with an integrated luminosity of 36.1fb −1 collected by the ATLAS detector at the LHC in 2015 and 2016. Candidate Zγ events with invisible decays of the Z boson are selected by requiring significant transverse momentum ( p T ) of the dineutrino system in conjunction with a single isolated photon with large transverse energy ( E T ). The rate of Zγ production is measured as a function of photon E T , dineutrino system p T and jet multiplicity. Evidence of anomalous triple gauge-boson couplings is sought in Zγ production with photon E T greater than 600 GeV. No excess is observed relative to the Standard Model expectation, and upper limits are set on the strength of ZZγ and Zγγ couplings.
Keywords Hadron-Hadron scattering (experiments)
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arXiv: 1810.04995
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ATLAS COLLABORATION. Measurement of the Z γ → ν ν ¯ γ $$ Z\gamma \to \nu \overline{\nu}\gamma $$ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector and limits on anomalous triple gauge-boson couplings. In: Journal of High Energy Physics, 2018, vol. 1812, p. 010. https://archive-ouverte.unige.ch/unige:113935

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Deposited on : 2019-02-07

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