The Diboson Excesses in Leptophobic $U(1{)}_{\mathrm{LP}}$ Models from String Theories

Abstract

The ATLAS Collaboration has reported excesses in the search for resonant diboson production with decay modes to hadronic final states at a diboson invariant mass around 2 TeV in boosted jets from $WZ$, $W^{+}{W}^{-}$, and $ZZ$ channels. Given potential contamination, we investigate the anomalies in leptophobic $U(1{)}_{\mathrm{LP}}$ models. We show that leptophobic models can be constructed in flipped $SU(5)\times U(1{)}_X$ models from free fermionic string constructions and Pati-Salam models from D-brane constructions. Additionally, we perform a collider phenomenological analysis to study production cross sections for $pp\to Z^{\prime }\to jj/t\bar{t}/WW/Zh$ and discover the excess can be interpreted in both the leptophobic flipped $SU(5)\times U(1{)}_X$ models and intersecting D-branes.

Physical Review D version; 19 pages, 1 figure, 9 tables; Additional comments included on an extended Higgs sector

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• Diboson resonances within a custodially protected warped extra-dimensional scenario
• Spinor-vector duality and light Z' in heterotic string vacua