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CERN Document Server 79 Datensätze gefunden  1 - 10nächsteEnde  gehen zum Datensatz: Die Suche hat 0.55 Sekunden gedauert. 
1.
Metastable cosmic strings / Buchmuller, Wilfried (DESY) ; Domcke, Valerie (CERN) ; Schmitz, Kai (Munster U.)
Many symmetry breaking patterns in grand unified theories (GUTs) give rise to cosmic strings that eventually decay when pairs of GUT monopoles spontaneously nucleate along the string cores. These strings are known as metastable cosmic strings and have intriguing implications for particle physics and cosmology. [...]
arXiv:2307.04691; CERN-TH-2023-118; MS-TP-23-37; DESY-23-117.- 2023-11-08 - 28 p. - Published in : JCAP 2311 (2023) 020 Fulltext: document - PDF; 2307.04691 - PDF;
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2.
Stochastic gravitational-wave background from metastable cosmic strings / Buchmuller, Wilfried (DESY) ; Domcke, Valerie (CERN ; Ecole Polytechnique, Lausanne) ; Schmitz, Kai (CERN)
A metastable cosmic-string network is a generic consequence of many grand unified theories (GUTs) when combined with cosmic inflation. Metastable cosmic strings are not topologically stable, but decay on cosmic time scales due to pair production of GUT monopoles. [...]
arXiv:2107.04578; CERN-TH-2021-107; DESY 21-101.- 2021-12-03 - 31 p. - Published in : JCAP 2112 (2021) 006 Fulltext: 2107.04578 - PDF; document - PDF;
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3.
From NANOGrav to LIGO with metastable cosmic strings / Buchmuller, Wilfried (DESY) ; Domcke, Valerie (CERN ; EPFL, Lausanne, LPPC) ; Schmitz, Kai (CERN)
We interpret the recent NANOGrav results in terms of a stochastic gravitational wave background from metastable cosmic strings. The observed amplitude of a stochastic signal can be translated into a range for the cosmic string tension and the mass of magnetic monopoles arising in theories of grand unification. [...]
arXiv:2009.10649; CERN-TH-2020-157; DESY 20-154; DESY-20-154.- 2020-12-10 - 4 p. - Published in : Phys. Lett. B 811 (2020) 135914 Article from SCOAP3: PDF; Fulltext: PDF;
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4.
Probing the scale of grand unification with gravitational waves / Buchmuller, Wilfried (DESY) ; Domcke, Valerie (DESY) ; Murayama, Hitoshi (DESY ; UC, Berkeley ; LBL, Berkeley ; Tokyo U., IPMU) ; Schmitz, Kai (CERN)
The spontaneous breaking of U(1)_B-L around the scale of grand unification can simultaneously account for hybrid inflation, leptogenesis, and neutralino dark matter, thus resolving three major puzzles of particle physics and cosmology in a single predictive framework. The B-L phase transition also results in a network of cosmic strings. [...]
arXiv:1912.03695; CERN-TH-2019-215; DESY-19-210; DESY 19-210; IPMU 19-0179.- 2020-09-03 - 5 p. - Published in : 10.1016/j.physletb.2020.135764 Article from SCOAP3: PDF; Fulltext: PDF;
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5.
Large-Field Inflation and Supersymmetry Breaking / Buchmuller, Wilfried (CERN) ; Dudas, Emilian (DESY ; Ecole Polytechnique, CPHT) ; Heurtier, Lucien (Ecole Polytechnique, CPHT ; DESY) ; Wieck, Clemens (DESY)
Large-field inflation is an interesting and predictive scenario. Its non-trivial embedding in supergravity was intensively studied in the recent literature, whereas its interplay with supersymmetry breaking has been less thoroughly investigated. [...]
arXiv:1407.0253; DESY-14-100; CPHT-RR037.0614.- 2014 - 17 p. - Published in : JHEP 09 (2014) 053 Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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6.
Seesaw Neutrinos from the Heterotic String / Buchmuller, Wilfried (DESY) ; Hamaguchi, Koichi (Tokyo U.) ; Lebedev, Oleg (CERN) ; Ramos-Sanchez, Saul (Bonn U.) ; Ratz, Michael (Munich, Tech. U.)
We study the possibility of realizing the neutrino seesaw mechanism in the E8XE8 heterotic string. In particular, we consider its Z_6 orbifold compactifications leading to the supersymmetric standard model gauge group and matter content. [...]
hep-ph/0703078; CERN-PH-TH-2007-050; DESY-07-030; TUM-HEP-660-07; CERN-PH-TH-2007-050; DESY-07-030; TUM-HEP-660-07; DESY-2007-030.- Geneva : CERN, 2007 - 4 p. - Published in : Phys. Rev. Lett. 99 (2007) 021601 APS Published version, local copy: PDF; Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
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7.
Neutrinos in the Early Univers / Buchmüller, Wilfried
DESY-05-078; DESY-2005-078.- Hamburg : DESY, 2005 - 13 p. - Published in : C. R. Phys. 6 (2005) 798-809 External link: Fulltext from DESY
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8.
Leptogenesis for Pedestrians / Buchmüller, Wilfried (Deutsches Elektronen Synchrotron DESY, Hamburg) ; Di Bari, P (IFAE, Universitat Autonoma de Barcelona, Bellaterra) ; Plümacher, M (CERN)
During the process of thermal leptogenesis temperature decreases by about one order of magnitude while the baryon asymmetry is generated. We present an analytical description of this process so that the dependence on the neutrino mass parameters becomes transparent. [...]
hep-ph/0401240; DESY-03-100; DESY-2003-100; UAB-FT-551; CERN-TH-2003-199.- Hamburg : DESY, 2005 - 55 p. - Published in : Ann. Phys. 315 (2005) 305-351 Access to fulltext document: PDF; External link: hep-ph/0401240 PDF - CERN library copies
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9.
Electric strings and light-like lumps in classical electrodynamics / Buchmüller, Wilfried ; Dietz, K ; Römer, H
BONN-HE-76-17. - 1976. - 6 p.
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10.
Leptogenesis and Dark Matter / Buchmüller, Wilfried
1998 Transparencies: TIF PDF;
In : Workshop on Cosmology and Particle Physics - CAPP-98, CERN, Geneva, Switzerland, 8 - 12 Jun 1998, pp.e-proc.
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