177 citations · 1k across the 38 of their papers we have counts for
38 papers
Classical constant electric fields and the Schwinger effect in de Sitter
Mar Bastero-Gil, Paulo B. Ferraz, António Torres Manso +2
We study constant classical electric fields and the Schwinger effect in de Sitter space, with potential implications for magnetogenesis and inflationary dark matter production. Tre…
Global fits and the 95 GeV diphoton excesses in the Supersymmetric Georgi-Machacek Model
Yingnan Xu, Dikai Li, Roberto Vega +2
Recently the ATLAS and CMS experiments have reported modest excesses in the diphoton channel at around 95 GeV.~A number of recent studies have examined whether these could be due t…
Schwinger Current in de Sitter Space
Mar Bastero-Gil, Paulo B. Ferraz, António Torres Manso +2
We study classical background electric fields and the Schwinger effect in de Sitter space. We show that having a constant electric field in de Sitter requires the photon to have a…
Schwinger dark matter production
Mar Bastero-Gil, Paulo B. Ferraz, Lorenzo Ubaldi +1
Building on recently constructed inflationary vector dark matter production mechanisms as well as studies of magnetogenesis, we show that an inflationary dark Schwinger mechanism c…
Super heavy dark matter from inflationary Schwinger production
Mar Bastero-Gil, Paulo B. Ferraz, Lorenzo Ubaldi +1
We consider a simple setup with a dark sector containing dark electrons charged under an abelian gauge symmetry. We show that if the massless dark photon associated to the…
Dark photon dark matter from a rolling inflaton
Mar Bastero-Gil, Jose Santiago, Lorenzo Ubaldi +1
We study in detail a recently proposed mechanism for producing non-thermal dark photon dark matter at the end of inflation in the mass range $μ\,{\rm eV} \lesssim m \lesssim 10\,{\…
On New Physics Contributions to the Higgs Decay to
Paul Archer-Smith, Daniel Stolarski, Roberto Vega-Morales
We explore models of new physics that can give rise to large (100% or more) enhancements to the rate of Higgs decay to while still being consistent with other measurements. We…
A Golden Probe of Nonlinear Higgs Dynamics
Da Liu, Ian Low, Roberto Vega-Morales
The most salient generic feature of a composite Higgs boson resides in the nonlinearity of its dynamics, which arises from degenerate vacua associated with the pseudo-Nambu-Goldsto…
The Full Lepton Flavor of the Littlest Higgs Model with T-parity
F. del Aguila, Ll. Ametller, J. I. Illana +3
We re-examine lepton flavor violation (LFV) in the Littlest Higgs model with T--parity (LHT) including the full T--odd (non-singlet) lepton and Goldstone sectors. The heavy leptons…
Vector dark matter production at the end of inflation
Mar Bastero-Gil, Jose Santiago, Lorenzo Ubaldi +1
It has been shown that the longitudinal mode of a massive vector boson can be produced by inflationary fluctuations and account for the dark matter content of the Universe. In this…
Light (and darkness) from a light hidden Higgs
Roberto Vega, Roberto Vega-Morales, Keping Xie
We examine light diphoton signals from extended Higgs sectors possessing (approximate) fermiophobia with Standard Model (SM) fermions as well as custodial symmetry. This class of H…
The Supersymmetric Georgi-Machacek Model
Roberto Vega, Roberto Vega-Morales, Keping Xie
We show that the well known Georgi-Machacek (GM) model can be realized as a limit of the recently constructed Supersymmetric Custodial Higgs Triplet Model (SCTM) which in general c…
Golden Probe of the di Threshold
Yi Chen, Roberto Vega-Morales
Recent studies indicate that the ground state of a QCD four bottom quark system may form a resonance in the range GeV, near the di- threshold, which may be observa…
Lepton Flavor Changing Higgs decays in the Littlest Higgs Model with T-parity
F. del Aguila, Ll. Ametller, J. I. Illana +3
We calculate loop induced lepton flavor violating Higgs decays in the Littlest Higgs model with T-parity. We find that a finite amplitude is obtained only when all contributions fr…
Golden Probe of Electroweak Symmetry Breaking
Yi Chen, Joe Lykken, Maria Spiropulu +2
The ratio of the Higgs couplings to and pairs, , is a fundamental parameter in electroweak symmetry breaking as well as a measure of the (approximate) custodial s…
Les Houches 2015: Physics at TeV colliders - new physics working group report
G. Brooijmans, C. Delaunay, A. Delgado +78
We present the activities of the 'New Physics' working group for the 'Physics at TeV Colliders' workshop (Les Houches, France, 1-19 June, 2015). Our report includes new physics stu…
Diphoton and Diboson Probes of Fermiophobic Higgs Bosons at the LHC
Antonio Delgado, Mateo Garcia-Pepin, Mariano Quiros +2
Extensions of the Standard Model Higgs sector with electroweak charged scalars can possess exotic `Higgs' bosons with vanishing or suppressed couplings to Standard Model fermions.…
The Virtual Diphoton Excess
Daniel Stolarski, Roberto Vega-Morales
Interpreting the excesses around 750 GeV in the diphoton spectra to be the signal of a new heavy scalar decaying to photons, we point out the possibility of looking for correlated…
Golden Probe of the Top Yukawa
Yi Chen, Daniel Stolarski, Roberto Vega-Morales
We describe how the Higgs decay to four leptons can be used to probe the nature and structure of the top Yukawa coupling.
New vector bosons and the diphoton excess
Jorge de Blas, Jose Santiago, Roberto Vega-Morales
We consider the possibility that the recently observed diphoton excess at GeV can be explained by the decay of a scalar particle () to photons. If the scalar is the r…
Into the multi-TeV scale with a Higgs golden ratio
Abdelhak Djouadi, Jérémie Quevillon, Roberto Vega-Morales
With the upgrade of the LHC, the couplings of the observed Higgs particle to fermions and gauge bosons will be measured with a much higher experimental accuracy than current measur…
Golden Probe of the Top Yukawa
Yi Chen, Daniel Stolarski, Roberto Vega-Morales
We perform a preliminary study of the ability of the Higgs decay to four leptons to shed light on the top quark Yukawa couplings. In particular we examine whether the …
New Opportunities in
Yi Chen, Roni Harnik, Roberto Vega-Morales
The Higgs decay has played an important role in discovering the Higgs and measuring its mass thanks to low background and excellent resolution. Current cuts in this ch…
Technical Note for 8D Likelihood Effective Higgs Couplings Extraction Framework in the Golden Channel
Yi Chen, Emanuele DiMarco, Joe Lykken +3
In this technical note we present technical details on various aspects of the framework introduced in arXiv:1401.2077 aimed at extracting effective Higgs couplings in the $h\to 4\e…