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Wash-in leptogenesis after axion inflation / Domcke, Valerie (CERN) ; Kamada, Kohei (Tokyo U., RESCEU) ; Mukaida, Kyohei (KEK, Tsukuba ; Sokendai, Tsukuba) ; Schmitz, Kai (CERN ; Munster U.) ; Yamada, Masaki (Tohoku U. ; Tohoku U., Astron. Inst.)
CP violation and the violation of baryon-minus-lepton number B-L do not necessarily have to occur simultaneously in order to accomplish successful leptogenesis. Instead, it suffices if new CP-violating interactions at high energies result in primordial charge asymmetries, which are then reprocessed into a nonvanishing B-L asymmetry by right-handed neutrinos (RHNs) at lower energies. [...]
arXiv:2210.06412; CERN-TH-2022-162; RESCEU-17/22; KEK-TH-2455; MS-TP-22-37; TU-1170.- 2023-01-12 - 56 p. - Published in : JHEP 2301 (2023) 053 Fulltext: 2210.06412 - PDF; document - PDF;

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Snowmass Theory Frontier: Astrophysics and Cosmology / Green, Daniel (UC, San Diego) ; Ruderman, Joshua T. (New York U., CCPP) ; Safdi, Benjamin R. (UC, Berkeley) ; Shelton, Jessie (Illinois U., Urbana) ; Achucarro, Ana (Leiden U.) ; Adshead, Peter (Illinois U., Urbana) ; Akrami, Yashar (Case Western Reserve U. ; Imperial Coll., London) ; Baryakhtar, Masha (Washington U., Seattle) ; Baumann, Daniel (Taiwan, Natl. Taiwan U. ; U. Amsterdam, GRAPPA) ; Berlin, Asher (Fermilab) et al.
We summarize progress made in theoretical astrophysics and cosmology over the past decade and areas of interest for the coming decade. [...]
arXiv:2209.06854 ; FERMILAB-PUB-22-721-T. - 57.
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New Constraint on Primordial Lepton Flavor Asymmetries / Domcke, Valerie (CERN ; EPFL, Lausanne, LPPC) ; Kamada, Kohei (Tokyo U., RESCEU) ; Mukaida, Kyohei (KEK, Tsukuba ; Sokendai, Tsukuba) ; Schmitz, Kai (Munster U.) ; Yamada, Masaki (Tohoku U., Astron. Inst. ; Tohoku U.)
A chiral chemical potential present in the early universe can source helical hypermagnetic fields through the chiral plasma instability. If these hypermagnetic fields survive until the electroweak phase transition, they source a contribution to the baryon asymmetry of the universe. [...]
arXiv:2208.03237; CERN-TH-2022-134; RESCEU-13/22; KEK-TH-2441; MS-TP-22-23; TU-1164.- 2023-06-30 - 7 p. - Published in : Phys. Rev. Lett. 130 (2023) 261803 Fulltext: 2208.03237 - PDF; Publication - PDF;

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Early-Universe Model Building / Asadi, Pouya (MIT, Cambridge, CTP) ; Bansal, Saurabh (Cincinnati U.) ; Berlin, Asher (Fermilab ; New York U.) ; Co, Raymond T. (Minnesota U., Theor. Phys. Inst.) ; Croon, Djuna (Durham U., IPPP) ; Cui, Yanou (UC, Riverside) ; Curtin, David (Toronto U.) ; Cyr-Racine, Francis-Yan (New Mexico U.) ; Davoudiasl, Hooman (BNL, NSLS) ; Rose, Luigi Delle (Barcelona, IFAE ; BIST, Barcelona) et al.
Theoretical investigations into the evolution of the early universe are an essential part of particle physics that allow us to identify viable extensions to the Standard Model as well as motivated parameter space that can be probed by various experiments and observations. [...]
arXiv:2203.06680 ; FERMILAB-CONF-22-158-T. - 206.
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Baryon Asymmetry of the Universe from Lepton Flavor Violation / Mukaida, Kyohei (KEK, Tsukuba ; Sokendai, Tsukuba) ; Schmitz, Kai (CERN) ; Yamada, Masaki (Tohoku U., Astron. Inst. ; Tohoku U.)
Charged-lepton flavor violation (CLFV) is a smoking-gun signature of physics beyond the Standard Model. The discovery of CLFV in upcoming experiments would indicate that CLFV processes must have been efficient in the early Universe at relatively low temperatures. [...]
arXiv:2111.03082; KEK-TH-2364; CERN-TH-2021-183; TU-1137.- 2022-06-28 - 10 p. - Published in : Phys. Rev. Lett. 129 (2022) 011803 Fulltext: PDF; Fulltext from publisher: PDF;

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Wash-In Leptogenesis / Domcke, Valerie (CERN ; EPFL, Lausanne, LPPC) ; Kamada, Kohei (Tokyo U., RESCEU) ; Mukaida, Kyohei (CERN ; DESY) ; Schmitz, Kai (CERN) ; Yamada, Masaki (Tohoku U., IIAIR ; Tohoku U.)
We present a leptogenesis mechanism based on the standard type-I seesaw model that successfully operates at right-handed-neutrino masses as low as a few 100 TeV. This mechanism, which we dub "wash-in leptogenesis", does not require any CP violation in the neutrino sector and can be implemented even in the regime of strong wash-out. [...]
arXiv:2011.09347; CERN-TH-2020-196; RESCEU-22/20; DESY-20-202; TU-1112.- 2021-05-21 - 7 p. - Published in : Phys. Rev. Lett. 126 (2021) 201802 Article from SCOAP3: PDF; Fulltext: PDF;

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Spontaneous Baryogenesis from Axions with Generic Couplings / Domcke, Valerie (DESY ; CERN ; EPFL, Lausanne, LPPC) ; Ema, Yohei (DESY) ; Mukaida, Kyohei (DESY) ; Yamada, Masaki (Tohoku U. (main) ; Tohoku U.)
Axion-like particles can source the baryon asymmetry of our Universe through spontaneous baryogenesis. Here we clarify that this is a generic outcome for essentially any coupling of an axion-like particle to the Standard Model, requiring only a non-zero velocity of the classical axion field while baryon or lepton number violating interactions are present in thermal bath. [...]
arXiv:2006.03148; DESY 20-100; DESY-20-100; CERN-TH-2020-088; TU-1102.- 2020-08-20 - 48 p. - Published in : JHEP 2008 (2020) 096 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;

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