674 citations · 3.2k across the 34 of their papers we have counts for
28 papers · 1 filter
Baryogenesis and Dark Matter in Multiple Hidden Sectors
Hassan Easa, Thomas Gregoire, Daniel Stolarski +1
We explore a mechanism for producing the baryon asymmetry and dark matter in models with multiple hidden sectors that are Standard-Model-like but with varying Higgs mass parameters…
Testing quasi-Dirac leptogenesis through neutrino oscillations
C. S. Fong, T. Gregoire, A. Tonero
The lightness of the Standard Model (SM) neutrinos could be understood if their masses were to be generated by new physics at a high scale, through the so-called seesaw mechanism i…
New Limits on Coloured Three Jet Resonances
Hassan Easa, Thomas Gregoire, Daniel Stolarski
We consider experimental limits on colour triplet fermions that decay dominantly to three jets via a scalar mediator that can be on- or off-shell. These fermions arise in top-partn…
Mirror Dirac leptogenesis
Kevin Earl, Chee Sheng Fong, Thomas Gregoire +1
We consider a mirror world scenario, in which light Dirac neutrinos are generated from a seesaw mechanism and leptogenesis occurs at high scale without violating lepton number. Aft…
Contributions to Anomalies from -Parity Violating Interactions
Kevin Earl, Thomas Gregoire
We examine the parameter space of supersymmetric models with -parity violating interactions of the form to explain the various anomalies observed in $b \rightarrow…
LHC phenomenology and baryogenesis in supersymmetric models with a baryon number
Hugues Beauchesne, Kevin Earl, Thomas Gregoire
We study the phenomenology of a supersymmetric extension of the Standard Model with an -symmetry under which -charges correspond to the baryon number. This identification all…
The spontaneous breaking Twin Higgs
Hugues Beauchesne, Kevin Earl, Thomas Grégoire
The Twin Higgs model seeks to address the little hierarchy problem by making the Higgs a pseudo-Goldstone of a global symmetry that is spontaneously broken to . Gaug…
LHC constraints on Mini-Split anomaly and gauge mediation and prospects for LHC 14 and a future 100 TeV pp collider
Hugues Beauchesne, Kevin Earl, Thomas Gregoire
Stringent experimental constraints have raised the lower limit on the masses of squarks to TeV levels, while compatibility with the mass of the Higgs boson provides an upper limit.…
Electroweak precision measurements in supersymmetric models with a U(1)R lepton number
Hugues Beauchesne, Thomas Gregoire
As experimental constraints on the parameter space of the MSSM and close variations thereof become stronger, the motivation to explore supersymmetric models that challenge some of…
Dirac gauginos, R symmetry and the 125 GeV Higgs
Enrico Bertuzzo, Claudia Frugiuele, Thomas Gregoire +1
We study a supersymmetric scenario with a quasi exact R-symmetry in light of the discovery of a Higgs resonance with a mass of 125 GeV. In such a framework, the additional adjoint…
"L=R" - as the Origin of Leptonic 'RPV'
Claudia Frugiuele, Thomas Gregoire, Piyush Kumar +1
A classification of phenomenologically interesting supersymmetric extensions of the Standard-Model with a symmetry is presented. Some of these are consistent with subsets…
"L=R" -- Lepton Number at the LHC
Claudia Frugiuele, Thomas Gregoire, Piyush Kumar +1
We perform a detailed study of a variety of LHC signals in supersymmetric models where lepton number is promoted to an (approximate) U(1)_R symmetry. Such a symmetry has interestin…
Exploring the heavy quark sector of the Bestest Little Higgs model at the LHC
Stephen Godfrey, Thomas Gregoire, Pat Kalyniak +2
We present discovery limits for heavy quarks in the Bestest Little Higgs model via pair production at the LHC running at . We study pair produced heavy t…
Dilaton constraints and LHC prospects
Baradhwaj Coleppa, Thomas Gregoire, Heather E. Logan
The Standard Model Higgs searches using the first 1-2 fb-1 of LHC data can be used to put interesting constraints on new scalar particles other than the Higgs. We investigate one s…
Making the Sneutrino a Higgs with a Lepton Number
Claudia Frugiuele, Thomas Gregoire
We present a supersymmetric extension of the Standard Model that posseses a continuous symmetry, which is identified with one of three lepton numbers, and where a sneutri…
Simplified Models for LHC New Physics Searches
Daniele Alves, Nima Arkani-Hamed, Sanjay Arora +92
This document proposes a collection of simplified models relevant to the design of new-physics searches at the LHC and the characterization of their results. Both ATLAS and CMS hav…
Toptet
Thomas Gregoire, Emanuel Katz, Veronica Sanz
Final states with four tops appear in various extensions of the Standard Model. Alas, top reconstruction faces combinatorial issues as they show up as large multiplicity events. In…
UV friendly T-parity in the SU(6)/Sp(6) little Higgs model
Tom Brown, Claudia Frugiuele, Thomas Gregoire
Electroweak precision tests put stringent constraints on the parameter space of little Higgs models. Tree-level exchange of TeV scale particles in a generic little Higgs model prod…
Discovering a Nonstandard Higgs in a Standard Way
Spencer Chang, Thomas Gregoire
In this note, we explore the Tevatron and LHC detection prospects for a nonstandard Higgs whose decays contain both missing and visible energy. In particular, we consider the decay…
A composite gluino at the LHC
Thomas Gregoire, Emanuel Katz
We investigate the decay of particles with the quantum numbers of the gluino. Besides SUSY, such particles may be present in models where the Higgs and top are composite. We find t…
Mirror World at the Large Hadron Collider
Riccardo Barbieri, Thomas Gregoire, Lawrence J. Hall
A mirror world can modify in a striking way the LHC signals of the Higgs sector. An exact or approximate Z_2 symmetry between the mirror world and our world allows large mixing bet…
D-type supersymmetry breaking and brane-to-brane gravity mediation
T. Gregoire, R. Rattazzi, C. A. Scrucca
We revisit the issue of gravitational contributions to soft masses in five-dimensional sequestered models. We point out that, unlike for the case of F-type supersymmetry breaking,…
What Precision Electroweak Physics Says About the SU(6)/Sp(6) Little Higgs
Thomas Gregoire, David R. Smith, Jay G. Wacker
We study precision electroweak constraints on the close cousin of the Littlest Higgs, the SU(6)/Sp(6) model. We identify a near-oblique limit in which the heavy W' and B' decouple…
Deconstructing six dimensional gauge theories with strongly coupled moose meshes
Thomas Gregoire, Jay G. Wacker
It has recently been realized that five dimensional theories can be generated dynamically from asymptotically free, QCD-like four dimensional dynamics via ``deconstruction.'' In th…