Results of a search for physics beyond the Standard Model in events containing an energetic photon and large missing transverse momentum with the ATLAS detector at the Large Hadron Collider are reported. As the number of events observed in data, corresponding to an integrated luminosity of 36.1 fb  −1−1   of proton–proton collisions at a centre-of-mass energy of   13 TeV13 TeV , is in agreement with the Standard Model expectations, model-independent limits are set on the fiducial cross section for the production of events in this final state. Exclusion limits are also placed in models where dark-matter candidates are pair-produced. For dark-matter production via an axial-vector or a vector mediator in the s-channel, this search excludes mediator masses below 750–  1200 GeV1200 GeV  for dark-matter candidate masses below 230–  480 GeV480 GeV  at 95% confidence level, depending on the couplings. In an effective theory of dark-matter production, the limits restrict the value of the suppression scale   M∗M∗  to be above   790 GeV790 GeV  at 95% confidence level. A limit is also reported on the production of a high-mass scalar resonance by processes beyond the Standard Model, in which the resonance decays to   ZγZγ  and the Z boson subsequently decays into neutrinos.

Title

European Physical Journal C

Publisher

Springer New York LLC

Publisher Country

United States of America

Indexing

Thomson Reuters

Impact Factor

14.691

Publication Type

Prtinted only

Volume

77

Year

2017

Pages

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