We perform a general analysis of new physics interpretations of the recent
ATLAS diboson excesses over Standard Model expectations in LHC Run I
collisions. Firstly, we estimate a likelihood function for the true signal in
the WW, WZ, and ZZ channels, finding that the maximum has zero events in
the WZ channel, though the likelihood is sufficiently flat to allow other
scenarios. Secondly, we survey the possible effective field theories containing
the Standard Model plus a new resonance that could explain the data, finding
just two possibilities, viz., a vector that is either a left- or right-handed
SU(2) triplet. Finally, we compare these models with other experimental data
and determine the parameter regions in which they provide a consistent
explanation
