99 citations · 269 across the 15 of their papers we have counts for
16 papers
From friction scaling to an efficient method for estimating bubble wall velocity
Tomasz Krajewski, Marek Lewicki, Marco Merchand +2
We present a unified description of first-order cosmological phase transition dynamics that links the phenomenological friction model employed in hydrodynamic simulations to the mi…
Imprints of Reheating Dynamics on Gravitational Waves from Phase Transitions
Basabendu Barman, Maciej Kierkla, Marek Lewicki +1
We investigate how perturbative reheating after inflation modifies the primordial gravitational wave (GW) spectrum generated by cosmological phase transitions. Within a specific in…
Exploring Ultra-Slow-Roll Inflation in Composite Pseudo-Nambu-Goldstone Boson Models: Implications for Primordial Black Holes and Gravitational Waves
Marco Merchand
We study inflation driven by a scalar potential arising from composite-sector dynamics, inspired by generalized composite Higgs models. The introduction of a non-minimal coupling,…
Hunting for heavy with IceCube neutrinos and gravitational waves
Basabendu Barman, Arindam Das, Suruj Jyoti Das +1
In the minimal gauged B-L extension of the Standard Model, we demonstrate that PeV-scale dark matter (DM) and the baryon asymmetry of the Universe (BAU) can be simultaneously expla…
Constraining dark matter from strong phase transitions in a model: Implications for neutrino masses and muon
Sandhya Choubey, Sarif Khan, Marco Merchand +1
In this paper, we study a non-minimal gauged model, where we add two complex singlet scalars, three right-handed Majorana neutrinos (RHN), and a vector-like dark f…
Phase transition and gravitational waves in maximally symmetric composite Higgs model
Avik Banerjee, Marco Merchand, Ignacy Nałęcz
In this paper we study phase transitions in a maximally symmetric composite Higgs model with next-to-minimal coset, where a pseudoscalar singlet emerges alongside the Higgs doublet…
Impact of theoretical uncertainties on model parameter reconstruction from GW signals sourced by cosmological phase transitions
Marek Lewicki, Marco Merchand, Laura Sagunski +2
Different computational techniques for cosmological phase transition parameters can impact the Gravitational Wave (GW) spectra predicted in a given particle physics model. To scrut…
Gravitational waves from first-order phase transitions in LISA: reconstruction pipeline and physics interpretation
Chiara Caprini, Ryusuke Jinno, Marek Lewicki +6
We develop a tool for the analysis of stochastic gravitational wave backgrounds from cosmological first-order phase transitions with LISA: we initiate a template databank for these…
Phases of Pseudo-Nambu-Goldstone Bosons
Fotis Koutroulis, Matthew McCullough, Marco Merchand +2
We study the vacuum dynamics of pseudo-Nambu-Goldstone bosons (pNGBs) for spontaneous and explicit symmetry breaking. We determine the magnitude of expl…
The Scalar Singlet Extension of the Standard Model: Gravitational Waves versus Baryogenesis
John Ellis, Marek Lewicki, Marco Merchand +2
We study the possible gravitational wave signal and the viability of baryogenesis arising from the electroweak phase transition in an extension of the Standard Model (SM) by a scal…
Electroweak bubble wall expansion: gravitational waves and baryogenesis in Standard Model-like thermal plasma
Marek Lewicki, Marco Merchand, Mateusz Zych
Computing the properties of the bubble wall of a cosmological first order phase transition at electroweak scale is of paramount importance for the correct prediction of the baryon…
Models with High Quality Flaxions
Christopher D. Carone, Marco Merchand
The "gauged'' Peccei-Quinn (PQ) mechanism of Fukuda, Ibe, Suzuki and Yanagida is implemented in the flavorful axion model of Carone and Merchand. This model of flavor is similar to…
Constraints on the Parameter Space in an Inert Doublet Model with two Active Doublets
Marco Merchand, Marc Sher
We study a three Higgs doublet model where one doublet is inert and the other two doublets are active. Flavor changing neutral currents are avoided at tree-level by imposing a soft…
Is the radion a bulk Higgs doublet?
Marco Merchand, Marc Sher, Keith Thrasher
In 2013, Geller, Bar-Shalom and Soni (GBS) proposed a Randall-Sundrum model with a bulk SU(2) doublet. They found that the doublet could both stabilize the extra dimension and brea…
Radion-Higgs Mixing in 2HDMs
Marco Merchand, Marc Sher, Keith Thrasher
We study the custodial Randall-Sundrum model with two Higgs doublets localized in the $\TeV $ brane. The scalar potential is CP- conserving and has a softly broken symmetry.…
A Three Doublet Lepton-Specific Model
Marco Merchand, Marc Sher
In the lepton-specific version of two Higgs doublet models, a discrete symmetry is used to couple one Higgs, , to quarks and the other, , to leptons. The symmetry elimina…