Semi-visible jets, with a significant contribution to the event’s missing transverse momentum, can arise in
strongly interacting dark sectors. This results in an event topology where one of the jets can be aligned with
the direction of the missing transverse momentum. The first search for semi-visible jets produced via a ????-channel
mediator exchange is presented. The analysis uses proton-proton collisions with an integrated luminosity of
139 fb−1 and a centre-of-mass energy of 13 TeV, collected with the ATLAS detector during the Run 2 of the
LHC. No excess over Standard Model predictions is observed. Assuming a coupling strength of unity between the
mediator, a Standard Model quark and a dark quark, mediator masses up to 2.7 TeV are excluded at the 95%
confidence level. Upper limits on the coupling strength are also derived.

Title

Physics letters B

Publisher

Elsevier's

Publisher Country

Netherlands

Indexing

Scopus

Impact Factor

4.3

Publication Type

Prtinted only

Volume

--

Year

--

Pages

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