Leptogenesis as an origin of hot dark matter and baryon asymmetry in the E6 inspired SUSY models
We explore leptogenesis within the E6 inspired U(1) extension of the MSSM in which exact custodial symmetry forbids tree-level flavour-changing transitions and the most dangerous baryon and lepton number violating operators. This supersymmetric (SUSY) model involves extra exotic matter beyond the MS...
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| Format: | Article |
| Language: | English |
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Elsevier
2018-04-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318301229 |
| _version_ | 1818244089552830464 |
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| author | R. Nevzorov |
| author_facet | R. Nevzorov |
| author_sort | R. Nevzorov |
| collection | DOAJ |
| description | We explore leptogenesis within the E6 inspired U(1) extension of the MSSM in which exact custodial symmetry forbids tree-level flavour-changing transitions and the most dangerous baryon and lepton number violating operators. This supersymmetric (SUSY) model involves extra exotic matter beyond the MSSM. In the simplest phenomenologically viable scenarios the lightest exotic fermions are neutral and stable. These states should be substantially lighter than 1eV forming hot dark matter in the Universe. The low-energy effective Lagrangian of the SUSY model under consideration possesses an approximate global U(1)E symmetry associated with the exotic states. The U(1)E symmetry is explicitly broken because of the interactions between the right-handed neutrino superfields and exotic matter supermultiplets. As a consequence the decays of the lightest right-handed neutrino/sneutrino give rise to both U(1)E and U(1)B−L asymmetries. When all right-handed neutrino/sneutrino are relatively light ∼106–107GeV the appropriate amount of the baryon asymmetry can be induced via these decays if the Yukawa couplings of the lightest right-handed neutrino superfields to the exotic matter supermultiplets vary between ∼10−4–10−3. |
| first_indexed | 2024-12-12T14:11:29Z |
| format | Article |
| id | doaj.art-ff07c314c2d54f278cdb9de98fa8f821 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-12T14:11:29Z |
| publishDate | 2018-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-ff07c314c2d54f278cdb9de98fa8f8212022-12-22T00:22:05ZengElsevierPhysics Letters B0370-26932018-04-01779223229Leptogenesis as an origin of hot dark matter and baryon asymmetry in the E6 inspired SUSY modelsR. Nevzorov0Alikhanov Institute for Theoretical and Experimental Physics, Moscow, 117218, RussiaWe explore leptogenesis within the E6 inspired U(1) extension of the MSSM in which exact custodial symmetry forbids tree-level flavour-changing transitions and the most dangerous baryon and lepton number violating operators. This supersymmetric (SUSY) model involves extra exotic matter beyond the MSSM. In the simplest phenomenologically viable scenarios the lightest exotic fermions are neutral and stable. These states should be substantially lighter than 1eV forming hot dark matter in the Universe. The low-energy effective Lagrangian of the SUSY model under consideration possesses an approximate global U(1)E symmetry associated with the exotic states. The U(1)E symmetry is explicitly broken because of the interactions between the right-handed neutrino superfields and exotic matter supermultiplets. As a consequence the decays of the lightest right-handed neutrino/sneutrino give rise to both U(1)E and U(1)B−L asymmetries. When all right-handed neutrino/sneutrino are relatively light ∼106–107GeV the appropriate amount of the baryon asymmetry can be induced via these decays if the Yukawa couplings of the lightest right-handed neutrino superfields to the exotic matter supermultiplets vary between ∼10−4–10−3.http://www.sciencedirect.com/science/article/pii/S0370269318301229 |
| spellingShingle | R. Nevzorov Leptogenesis as an origin of hot dark matter and baryon asymmetry in the E6 inspired SUSY models Physics Letters B |
| title | Leptogenesis as an origin of hot dark matter and baryon asymmetry in the E6 inspired SUSY models |
| title_full | Leptogenesis as an origin of hot dark matter and baryon asymmetry in the E6 inspired SUSY models |
| title_fullStr | Leptogenesis as an origin of hot dark matter and baryon asymmetry in the E6 inspired SUSY models |
| title_full_unstemmed | Leptogenesis as an origin of hot dark matter and baryon asymmetry in the E6 inspired SUSY models |
| title_short | Leptogenesis as an origin of hot dark matter and baryon asymmetry in the E6 inspired SUSY models |
| title_sort | leptogenesis as an origin of hot dark matter and baryon asymmetry in the e6 inspired susy models |
| url | http://www.sciencedirect.com/science/article/pii/S0370269318301229 |
| work_keys_str_mv | AT rnevzorov leptogenesisasanoriginofhotdarkmatterandbaryonasymmetryinthee6inspiredsusymodels |