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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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(91)

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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(44)

Search for a light Higgs boson in single-photon decays of $\Upsilon(1S)$ using $\Upsilon(2S) \to \pi^+ \pi^- \Upsilon(1S)$ tagging method / Belle Collaboration
We search for a light Higgs boson ($A^0$) decaying into a $\tau^+\tau^-$ or $\mu^+\mu^-$ pair in the radiative decays of $\Upsilon(1S)$. The production of $\Upsilon(1S)$ mesons is tagged by $\Upsilon(2S)\to \pi^+ \pi^- \Upsilon(1S)$ transitions, using 158 million $\Upsilon(2S)$ events accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. [...]
arXiv:2112.11852; Belle Preprint 2021-30; KEK Preprint 2021-35.- 2022-02-23 - 9 p. - Published in : Phys. Rev. Lett. 128 (2022) 081804 Fulltext: PDF;

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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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(39)

Measurements of partial branching fractions of inclusive B→Xuℓ+νℓ decays with hadronic tagging / Belle Collaboration
We present measurements of partial branching fractions of inclusive semileptonic $B \to X_u \, \ell^+\, \nu_{\ell}$ decays using the full Belle data set of 711 fb$^{-1}$ of integrated luminosity at the $\Upsilon(4S)$ resonance and for $\ell = e, \mu$. Inclusive semileptonic $B \to X_u \, \ell^+\, \nu_{\ell}$ decays are CKM suppressed and measurements are complicated by the large background from CKM-favored $B \to X_c \, \ell^+\, \nu_{\ell}$ transitions, which have a similar signature. [...]
arXiv:2102.00020; Belle Preprint 2020-22; KEK Preprint 2020-39.- 2021-07-01 - 34 p. - Published in : Phys. Rev. D 104 (2021) 012008 Fulltext: PDF;

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(28)

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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(28)

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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Measurements of the $\nu_{\mu}$ and $\bar{\nu}_{\mu}$-induced coherent charged pion production cross cections on $^{12}C$ by the T2K experiment / T2K Collaboration
We report an updated measurement of the $\nu_{\mu}$-induced, and the first measurement of the $\bar{\nu}_{\mu}$-induced coherent charged pion production cross section on $^{12}C$ nuclei in the T2K experiment. This is measured in a restricted region of the final-state phase space for which $p_{\mu,\pi} > 0.2$ GeV, $\cos(\theta_{\mu}) > 0.8$ and $\cos(\theta_{\pi}) > 0.6$, and at a mean (anti)neutrino energy of 0.85 GeV using the T2K near detector. [...]
arXiv:2308.16606.- 2023-11-01 - 15 p. - Published in : Phys. Rev. D 108 (2023) 092009 Fulltext: 2308.16606 - PDF; Publication - PDF;

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Axion induced SUSY breaking and focus point gaugino mediation / Harigaya, Keisuke (LBNL, Berkeley ; UC, Berkeley ; CERN) ; Yanagida, Tsutomu T. (Tsung-Dao Lee Inst., Shanghai ; Tokyo U., IPMU) ; Yokozaki, Norimi (Hangzhou, Zhejiang U. ; Tohoku U.)
We consider a scenario where the supersymmetry breaking and its mediation, and the cancellation of the theta parameter of SU(3)c are all caused by a single chiral multiplet. The string axion multiplet is a natural candidate of such a single superfield. [...]
arXiv:1710.02204; IPMU17-0134; TU-1047.- 2022-10-10 - 9 p. - Published in : Phys. Lett. B 833 (2022) 137386 Fulltext: Publication - PDF; 1710.02204 - 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 p.
Fermilab Library Server - eConf - Fulltext - Fulltext

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