Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Merchand, Marco"'
In this paper, we study a non-minimal gauged $U(1)_{L_{\mu}-L_{\tau}}$ model, where we add two complex singlet scalars, three right-handed Majorana neutrinos (RHN), and a vector-like dark fermion to the Standard Model (SM), all non-trivially charged
Externí odkaz:
http://arxiv.org/abs/2406.16460
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. The maximal symmetry guarantees the finiteness of the radiatively ge
Externí odkaz:
http://arxiv.org/abs/2406.14633
Different computational techniques for cosmological phase transition parameters can impact the Gravitational Wave (GW) spectra predicted in a given particle physics model. To scrutinize the importance of this effect, we perform large-scale parameter
Externí odkaz:
http://arxiv.org/abs/2403.03769
Autor:
Caprini, Chiara, Jinno, Ryusuke, Lewicki, Marek, Madge, Eric, Merchand, Marco, Nardini, Germano, Pieroni, Mauro, Pol, Alberto Roper, Vaskonen, Ville
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 signals, prototype their searches, and forecast their reconstruction.
Externí odkaz:
http://arxiv.org/abs/2403.03723
We study the vacuum dynamics of pseudo-Nambu-Goldstone bosons (pNGBs) for $SO(N+1) \rightarrow SO(N)$ spontaneous and explicit symmetry breaking. We determine the magnitude of explicit symmetry breaking consistent with an EFT description of the effec
Externí odkaz:
http://arxiv.org/abs/2309.15749
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 scalar singlet field without a $\mathbb{Z}_2$ symmetry. We first analyze t
Externí odkaz:
http://arxiv.org/abs/2210.16305
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 asymmetry of the universe and the spectrum of gravitational waves. By
Externí odkaz:
http://arxiv.org/abs/2111.02393
Publikováno v:
Phys. Rev. D 101, 115032 (2020)
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 other successful ones based on the double tetrahedral group, but the
Externí odkaz:
http://arxiv.org/abs/2004.02040
Autor:
Merchand, Marco, Sher, Marc
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 softly broken $Z'_2$ symmetry and we consider type I and type II Yukawa st
Externí odkaz:
http://arxiv.org/abs/1911.06477
Publikováno v:
Phys. Rev. D 100, 035006 (2019)
We extend the work of Carone, Chaurasia and Vasquez on non-supersymmetric models of flavor based on the double tetrahedral group. Three issues are addressed: (1) the sector of flavor-symmetry-breaking fields is simplified and their potential studied
Externí odkaz:
http://arxiv.org/abs/1904.11059