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Searches for the Zγ decay mode of the Higgs boson and for new high-mass resonances in pp collisions at √s=13 TeV with the ATLAS detector

Publication ,  Journal Article
Aaboud, M; Aad, G; Abbott, B; Abdinov, O; Abeloos, B; Abidi, SH; AbouZeid, OS; Abraham, NL; Abramowicz, H; Abreu, H; Abreu, R; Abulaiti, Y ...
Published in: Journal of High Energy Physics
October 1, 2017

This article presents searches for the Zγ decay of the Higgs boson and for narrow high-mass resonances decaying to Zγ, exploiting Z boson decays to pairs of electrons or muons. The data analysis uses 36.1 fb−1 of pp collisions at s=13 recorded by the ATLAS detector at the CERN Large Hadron Collider. The data are found to be consistent with the expected Standard Model background. The observed (expected — assuming Standard Model pp → H → Zγ production and decay) upper limit on the production cross section times the branching ratio for pp → H → Zγ is 6.6. (5.2) times the Standard Model prediction at the 95% confidence level for a Higgs boson mass of 125.09 GeV. In addition, upper limits are set on the production cross section times the branching ratio as a function of the mass of a narrow resonance between 250 GeV and 2.4 TeV, assuming spin-0 resonances produced via gluon-gluon fusion, and spin-2 resonances produced via gluon-gluon or quark-antiquark initial states. For high-mass spin-0 resonances, the observed (expected) limits vary between 88 fb (61 fb) and 2.8 fb (2.7 fb) for the mass range from 250 GeV to 2.4 TeV at the 95% confidence level.

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Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

October 1, 2017

Volume

2017

Issue

10

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics
 

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Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abidi, S. H., … Armitage, L. J. (2017). Searches for the Zγ decay mode of the Higgs boson and for new high-mass resonances in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics, 2017(10). https://doi.org/10.1007/JHEP10(2017)112
Aaboud, M., G. Aad, B. Abbott, O. Abdinov, B. Abeloos, S. H. Abidi, O. S. AbouZeid, et al. “Searches for the Zγ decay mode of the Higgs boson and for new high-mass resonances in pp collisions at √s=13 TeV with the ATLAS detector.” Journal of High Energy Physics 2017, no. 10 (October 1, 2017). https://doi.org/10.1007/JHEP10(2017)112.
Aaboud M, Aad G, Abbott B, Abdinov O, Abeloos B, Abidi SH, et al. Searches for the Zγ decay mode of the Higgs boson and for new high-mass resonances in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics. 2017 Oct 1;2017(10).
Aaboud, M., et al. “Searches for the Zγ decay mode of the Higgs boson and for new high-mass resonances in pp collisions at √s=13 TeV with the ATLAS detector.” Journal of High Energy Physics, vol. 2017, no. 10, Oct. 2017. Scopus, doi:10.1007/JHEP10(2017)112.
Aaboud M, Aad G, Abbott B, Abdinov O, Abeloos B, Abidi SH, AbouZeid OS, Abraham NL, Abramowicz H, Abreu H, Abreu R, Abulaiti Y, Acharya BS, Adachi S, Adamczyk L, Adelman J, Adersberger M, Adye T, Affolder AA, Agatonovic-Jovin T, Agheorghiesei C, Aguilar-Saavedra JA, Ahlen SP, Ahmadov F, Aielli G, Akatsuka S, Akerstedt H, Åkesson TPA, Akilli E, Akimov AV, Alberghi GL, Albert J, Albicocco P, Alconada Verzini MJ, Alderweireldt SC, Aleksa M, Aleksandrov IN, Alexa C, Alexander G, Alexopoulos T, Alhroob M, Ali B, Aliev M, Alimonti G, Alison J, Alkire SP, Allbrooke BMM, Allen BW, Allport PP, Aloisio A, Alonso A, Alonso F, Alpigiani C, Alshehri AA, Alstaty MI, Alvarez Gonzalez B, Álvarez Piqueras D, Alviggi MG, Amadio BT, Amaral Coutinho Y, Amelung C, Amidei D, Amor Dos Santos SP, Amoroso S, Amundsen G, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders JK, Anderson KJ, Andreazza A, Andrei V, Angelidakis S, Angelozzi I, Angerami A, Anisenkov AV, Anjos N, Annovi A, Antel C, Antonelli M, Antonov A, Antrim DJ, Anulli F, Aoki M, Aperio Bella L, Arabidze G, Arai Y, Araque JP, Araujo Ferraz V, Arce ATH, Ardell RE, Arduh FA, Arguin JF, Argyropoulos S, Arik M, Armbruster AJ, Armitage LJ. Searches for the Zγ decay mode of the Higgs boson and for new high-mass resonances in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics. 2017 Oct 1;2017(10).
Journal cover image

Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

October 1, 2017

Volume

2017

Issue

10

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics