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CERN Document Server Encontrados 3 registros  La búsqueda tardó 0.55 segundos. 
1.
Gravitational waves from first-order phase transitions in LISA: reconstruction pipeline and physics interpretation / Caprini, Chiara (Geneva U., Dept. Theor. Phys. ; CERN) ; Jinno, Ryusuke (Tokyo U., RESCEU) ; Lewicki, Marek (Warsaw U.) ; Madge, Eric (Weizmann Inst.) ; Merchand, Marco (Royal Inst. Tech., Stockholm ; Stockholm U., OKC) ; Nardini, Germano (Stavanger U.) ; Pieroni, Mauro (CERN) ; Roper Pol, Alberto (Geneva U., Dept. Theor. Phys.) ; Vaskonen, Ville (INFN, Padua ; INFN, Italy ; Unlisted, EE) /LISA Cosmology Working Group
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. The templates encompass the gravitational wave signals sourced by bubble collisions, sound waves and turbulence. [...]
arXiv:2403.03723; LISA-COSWG-24-01; CERN-TH-2024-029.- 2024-10-04 - 54 p. - Published in : JCAP 2410 (2024) 020 Fulltext: document - PDF; 2403.03723 - PDF;
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2.
Phases of Pseudo-Nambu-Goldstone Bosons / Koutroulis, Fotis (Warsaw U.) ; McCullough, Matthew (CERN) ; Merchand, Marco (Warsaw U. ; Royal Inst. Tech., Stockholm ; Stockholm U., OKC) ; Pokorski, Stefan (Warsaw U.) ; Sakurai, Kazuki (Warsaw U.)
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 effective potential at zero and finite temperatures. [...]
arXiv:2309.15749.- 2024-05-09 - 29 p. - Published in : JHEP 2405 (2024) 095 Fulltext: 2309.15749 - PDF; document - PDF;
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3.
The Scalar Singlet Extension of the Standard Model: Gravitational Waves versus Baryogenesis / Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Lewicki, Marek (Warsaw U.) ; Merchand, Marco (Warsaw U.) ; No, José Miguel (Madrid, IFT ; Madrid, Autonoma U.) ; Zych, Mateusz (Warsaw U.)
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 the velocity of the expanding true-vacuum bubbles during the phase transition, confirming our previous finding in the unbroken $\mathbb{Z}_2$ symmetry scenario, where the bubble wall velocity can be computed from first principles only for weak transitions with strength parameters $\alpha \lesssim 0.05$, and the Chapman-Jouguet velocity defines the maximum velocity for which the wall is stopped by the friction from the plasma. [...]
arXiv:2210.16305; CERN-TH-2022-150; KCL-PH-TH/2022-48; IFT–UAM/CSIC–22-133.- 2023-01-18 - 36 p. - Published in : JHEP 2301 (2023) 093 Fulltext: document - PDF; 2210.16305 - PDF;
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1 Merchand, M
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