Advanced search    

Search: authors:"Bogdan A. Dobrescu"

11 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

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...

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...

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...

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

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 neutral...

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