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

• Published in: The journal of high energy physics 2018, Vol.12
• Main Authors: Aaboud, Morad, Aad, Georges, Abbott, Brad, Abdinov, Ovsat, Abeloos, Baptiste, Abhayasinghe, Deshan Kavishka, Abidi, Syed Haider, Abouzeid, Ossama, Abraham, Nicola, Abramowicz, Halina, Abreu, Henso, Abulaiti, Yiming, Acharya, Bobby Samir, Adachi, Shunsuke, Adam, Lennart, Adamczyk, Leszek, Adelman, Jahred, Adersberger, Michael, Adiguzel, Aytul, Adye, Tim, Affolder, Tony, Afik, Yoav, Agheorghiesei, Catalin, Aguilar Saavedra, Juan Antonio, Ahmadov, Faig, Aielli, Giulio, Akatsuka, Shunichi, Akesson, Torsten Paul Ake, Akilli, Ece, Akimov, Andrei, Alberghi, Gian Luigi, Albert, Justin, Albicocco, Pietro, Alconada Verzini, Maria Josefina, Alderweireldt, Sara Caroline, Aleksa, Martin, Aleksandrov, Igor, Alexa, Calin, Alexopoulos, Theodoros, Alhroob, Muhammad, Ali, Babar, Alimonti, Gianluca, Alison, John, Alkire, Steven Patrick, Allaire, Corentin, Allbrooke, Benedict, Allen, Benjamin William, Allport, Phillip, Aloisio, Alberto, Alonso, Alejandro, Alonso, Francisco, Alpigiani, Cristiano, Alshehri, Azzah Aziz, Alstaty, Mahmoud, Alvarez Gonzalez, Barbara, Alvarez Piqueras, Damian, Alviggi, Mariagrazia, Amadio, Brian Thomas, Amaral Coutinho, Yara, Ambler, Alessandro, Ambroz, Luca, Amelung, Christoph, Amidei, Dante Eric, Amor dos Santos, Susana Patricia, Amoroso, Simone, Amrouche, Cherifa Sabrina, Anastopoulos, Christos, Ancu, Lucian Stefan, Andari, Nansi, Andeen, Timothy, Anders, Christoph Falk, Anders, John Kenneth, Anderson, Kelby, Andreazza, Attilio, Andrei, George Victor, Anelli, Christopher Ryan, Angelidakis, Stylianos, Angelozzi, Ivan, Angerami, Aaron, Anisenkov, Alexey, Annovi, Alberto, Antel, Claire, Anthony, Matthew Thomas, Antonelli, Mario, Antrim, Daniel Joseph, Anulli, Fabio, Aoki, Masato, Aparisi Pozo, Javier Alberto, Aperio Bella, Ludovica, Arabidze, Giorgi, Araque Espinosa, Juan Pedro, Araujo Ferraz, Victor, Araujo Pereira, Rodrigo, Arce, Ayana, Ardell, Rose Elisabeth, Arduh, Francisco Anuar, Arguin, Jean-Francois, Argyropoulos, Spyridon, Armbruster, Aaron James, Armitage, Lewis James
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 1126-6708; 1029-8479
• DOI: 10.1007/JHEP12(2018)010

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 $ \sqrt{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.