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Abstract
Recently, the ATLAS Collaboration recorded an interesting anomaly in diboson production with excesses at the diboson invariant mass around 2 TeV in boosted jets of all the WZ, W+W−, and ZZ channels. We offer a theoretical interpretation of the anomaly using a phenomenological right-handed model with extra W′ and Z′ bosons. Constraints from narrow total decay widths, dijet cross sections, and W/Z+H production are taken into account. We also comment on a few other possibilities.
Highlights
The ATLAS Collaboration [1] reported an experimental anomaly in diboson production with apparent excesses in boosted jets of the W + W −, W ± Z, and Z Z channels at around 2 TeV invariant mass of the boson pair
The experiment used the method of jet substructure to discriminate the hadronic decays of the W and Z bosons from the usual QCD dijets
We have considered a phenomenological SU(2)R model that contains extra W and Z bosons, which mix with the SM W
Summary
The ATLAS Collaboration [1] reported an experimental anomaly in diboson production with apparent excesses in boosted jets of the W + W −, W ± Z , and Z Z channels at around 2 TeV invariant mass of the boson pair. It is intriguing because the excesses are all around 2 TeV. We shall show that the W decay into W Z dominates if the mixing angle is larger than 10−2 It can explain the excess in the W Z channel without violating the leptonic cross sections [3,4,5,6] and the dijet-mass search at the LHC [7,8]. One possibility to relax this constraint is to employ the leptophobic Z model, which is achievable in a number of GUT models [10] In such a case, the constraint on the mixing angle can be relaxed to 8 × 10−3 [10], which is close to the value required to explain the diboson anomaly. We shall consider the dilepton constraint, as well as the dijet constraint using the most recent data from the LHC
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