Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at $$\sqrt{s}=8~$$ s = 8 TeV with the ATLAS detector

Abstract

Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb of TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between GeV and GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presented.

ALPs effective field theory and collider signatures

“…Table 2 summarises the couplings which may a priori con- [104] tribute to a mono-Z signal among those in the chiral basis, Eqs. (47) and (49). It will be argued next that only cW may be expected to be seriously tested by this signal.…”

“…[42][43][44][45][46][47][48][49][50][51][52][53]), including as well their impact at colliders for the case f a ∼ O(TeV) [35,36]. Additionally, constraints on the linear coupling of the ALP to W ± gauge bosons have recently been obtained in Refs.…”

“…(24). Limits of order g agg 10 −4 GeV −1 (95% CL) for m a 0.1 GeV, (27) were obtained [35] by recasting 8 TeV LHC analyses [48,49]. …”

Strongly Interacting Light Dark Matter

“…Here the LHC constraints have been derived from the data of Ref. [35], imposing an additional cut in the centre-of-mass energyŝ < M 2 . This cut, and the representation in the (g * , M )-plane, help us establishing consistency of the EFT assumption [27,36,37].…”

Possibility of hypothetical stable micro black hole production at future 100 TeV collider

“…In these theories the value of the higher-dimensional Panck mass can be as low as several TeV. Existing constraints on the parameters of the models with extra dimensions come from the direct measurements of Newton's law of gravitation at small distances [8,29] and from the LHC searches [4,24] for the missing transverse energy of jets due to gravitonemission processes: the radii of the extra dimensions R D < 37 µm and the Planck mass M D > 3.5 TeV. In this work we will conservatively assume M D > 3 TeV.…”