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CERN Document Server Pronađeno je 3 zapisa  Pretraživanje je potrajalo 0.51 sekundi 
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;
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)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;
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 Z2 symmetry. We first analyze the velocity of the expanding true-vacuum bubbles during the phase transition, confirming our previous finding in the unbroken Z2 symmetry scenario, where the bubble wall velocity can be computed from first principles only for weak transitions with strength parameters α0.05, 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
1 Merchand, Marco,
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