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Collider tests of the Renormalizable Coloron Model

AbstractThe coloron, a massive version of the gluon present in gauge extensions of QCD, has been searched for at the LHC as a dijet or top quark pair resonance. We point out that in the Renormalizable Coloron Model (ReCoM) with a minimal field content to break the gauge symmetry, a color-octet scalar and a singlet scalar are naturally lighter than the coloron because they are...

Higgs–photon resonances

We study models that produce a Higgs boson plus photon (\(h^0\gamma \)) resonance at the LHC. When the resonance is a \(Z'\) boson, decays to \(h^0\gamma \) occur at one loop. If the \(Z'\) boson couples at tree level to quarks, then the \(h^0\gamma \) branching fraction is typically of order \(10^{-5}\) or smaller. Nevertheless, there are models that would allow the observation...

Signals of a 2 TeV W′ boson and a heavier Z′ boson

We construct an SU(2) L × SU(2) R × U(1) B−L model with a Higgs sector that consists of a bidoublet and a doublet, and with a right-handed neutrino sector that includes one Dirac fermion and one Majorana fermion. This model explains the Run 1 CMS and ATLAS excess events in the e + e − jj, jj, Wh 0 and WZ channels in terms of a W′ boson of mass near 1.9 TeV and of coupling g R in...

Dark matter beams at LBNF

High-intensity neutrino beam facilities may produce a beam of light dark matter when protons strike the target. Searches for such a dark matter beam using its scattering in a nearby detector must overcome the large neutrino background. We characterize the spatial and energy distributions of the dark matter and neutrino beams, focusing on their differences to enhance the...

Heavy Higgs bosons and the 2 TeV W ′ boson

The hints from the LHC for the existence of a W ′ boson of mass around 1.9 TeV point towards a certain SU(2) L × SU(2) R × U(1) B−L gauge theory with an extended Higgs sector. We show that the decays of the W ′ boson into heavy Higgs bosons have sizable branching fractions. Interpreting the ATLAS excess events in the search for same-sign lepton pairs plus b jets as arising from W...

GeV-scale dark matter: production at the Main Injector

Assuming that dark matter particles interact with quarks via a GeV-scale mediator, we study dark matter production in fixed target collisions. The ensuing signal in a neutrino near detector consists of neutral-current events with an energy distribution peaked at higher values than the neutrino background. We find that for a Z ′ boson of mass around a few GeV that decays to dark...

W′ signatures with odd Higgs particles

Abstract We point out that W ′ bosons may decay predominantly into Higgs particles associated with their broken gauge symmetry. We demonstrate this in a renormalizable model where the W ′ and W couplings to fermions differ only by an overall normalization. This “meta-sequential” W ′ boson decays into a scalar pair, with the charged one subsequently decaying into a W boson and a...

Higgs mass from compositeness at a multi-TeV scale

Within composite Higgs models based on the top seesaw mechanism, we show that the Higgs field can arise as the pseudo Nambu-Goldstone boson of the broken U(3) L chiral symmetry associated with a vector-like quark and the t-b doublet. As a result, the lightest CP-even neutral state of the composite scalar sector is lighter than the top quark, and can be identified as the newly...

Coupling spans of the Higgs-like boson

Bogdan A. Dobrescu 0 Joseph D. Lykken 0 0 Theoretical Physics Department , Fermilab, P.O. Box 500, Batavia, IL 60510, U.S.A Using the LHC and Tevatron data, we set upper and lower limits on the

Heavy octets and Tevatron signals with three or four b jets

Yang Bai 1 Bogdan A. Dobrescu 0 Open Access 0 Theoretical Physics Department , Fermilab, Batavia, IL 60510, U.S.A 1 SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, CA 94025

Semileptonic decays of the standard Higgs boson

Bogdan A. Dobrescu 0 Joseph D. Lykken 0 0 Theoretical Physics Department , Fermilab, Batavia, IL 60510, U.S.A The Higgs boson decay into a pair of real or virtual W bosons, with one of them