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Article
Report number	MPP--2015--155 ; LMU-ASC-45-15 ; arXiv:1507.05299 ; MPP-2015-155 ; LMU-ASC 45-15
Title	Stringy origin of diboson and dijet excesses at the LHC
Author(s)	Anchordoqui, Luis A. (Lehman Coll. ; CUNY, Graduate School - U. Ctr. ; Amer. Museum Natural Hist.) ; Antoniadis, Ignatios (Paris, LPTHE ; CERN ; U. Bern, AEC) ; Goldberg, Haim (Northeastern U.) ; Huang, Xing (Taiwan, Natl. Normal U.) ; Lust, Dieter (Munich U., ASC ; Munich, Max Planck Inst.) ; Taylor, Tomasz R. (Northeastern U.)
Publication	2015-08-15
Imprint	19 Jul 2015
Number of pages	5
Note	References added. To be published in PLB
In:	Phys. Lett. B 749 (2015) 484-488
DOI	10.1016/j.physletb.2015.08.033
Subject category	Particle Physics - Phenomenology
Abstract	Very recently, the ATLAS and CMS collaborations reported diboson and dijet excesses above standard model expectations in the invariant mass region of 1.8 -2.0 TeV. Interpreting the diboson excess of events in a model independent fashion suggests that the vector boson pair production searches are best described by WZ or ZZ topologies, because states decaying into W^+W^- pairs are strongly constrained by semileptonic searches. We show that both the diboson and dijet excesses can be steered by an anomalous U(1) field with very small coupling to leptons. The Drell-Yan bounds are then readily avoided because of the leptophobic nature of the massive Z' gauge boson. The non-negligible decay into ZZ required to accommodate the data is a characteristic footprint of intersecting D-brane models, wherein the Landau-Yang theorem can be evaded by anomaly-induced operators involving a longitudinal Z. The model presented herein can be viewed purely field-theoretically, although it is particularly well motivated from string theory. Should the excesses become statistically significant at the LHC13, the associated Z\gamma{} topology would become a signature consistent only with a stringy origin.
Copyright/License	arXiv nonexclusive-distrib. 1.0 publication: © 2015-2025 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³

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