Leptogenesis and Dark Matter–Nucleon Scattering Cross Section in the SE<sub>6</sub>SSM
The <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>E</mi><mn>6</mn></msub></semantics></math></inline-formula>-inspired extension of the minimal supersy...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/9/3/137 |
| _version_ | 1827747437737934848 |
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| author | Roman Nevzorov |
| author_facet | Roman Nevzorov |
| author_sort | Roman Nevzorov |
| collection | DOAJ |
| description | The <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>E</mi><mn>6</mn></msub></semantics></math></inline-formula>-inspired extension of the minimal supersymmetric (SUSY) standard model (MSSM) with an extra <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mi>N</mi></msub></mrow></semantics></math></inline-formula> gauge symmetry, under which right-handed neutrinos have zero charge, involves exotic matter beyond the MSSM to ensure anomaly cancellation. We consider the variant of this extension (SE<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>6</mn></msub></semantics></math></inline-formula>SSM) in which the cold dark matter is composed of the lightest neutral exotic fermion and gravitino. The observed baryon asymmetry can be induced in this case via the decays of the lightest right-handed neutrino/sneutrino into exotic states even for relatively low reheating temperatures <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>T</mi><mi>R</mi></msub><mo>≲</mo><msup><mn>10</mn><mrow><mn>6</mn><mo>−</mo><mn>7</mn></mrow></msup><mspace width="0.166667em"></mspace><mrow><mi>G</mi><mi>e</mi><mi>V</mi></mrow></mrow></semantics></math></inline-formula>. We argue that there are some regions of the SE<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>6</mn></msub></semantics></math></inline-formula>SSM parameter space, which are safe from all current constraints, and discuss the implications of this model for collider phenomenology. |
| first_indexed | 2024-03-11T05:48:32Z |
| format | Article |
| id | doaj.art-c0e6ac3e1a504b65aa6822442e7e6464 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-11T05:48:32Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-c0e6ac3e1a504b65aa6822442e7e64642023-11-17T14:15:58ZengMDPI AGUniverse2218-19972023-03-019313710.3390/universe9030137Leptogenesis and Dark Matter–Nucleon Scattering Cross Section in the SE<sub>6</sub>SSMRoman Nevzorov0I.E.Tamm Theory Department, P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Prospekt, 119991 Moscow, RussiaThe <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>E</mi><mn>6</mn></msub></semantics></math></inline-formula>-inspired extension of the minimal supersymmetric (SUSY) standard model (MSSM) with an extra <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mi>N</mi></msub></mrow></semantics></math></inline-formula> gauge symmetry, under which right-handed neutrinos have zero charge, involves exotic matter beyond the MSSM to ensure anomaly cancellation. We consider the variant of this extension (SE<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>6</mn></msub></semantics></math></inline-formula>SSM) in which the cold dark matter is composed of the lightest neutral exotic fermion and gravitino. The observed baryon asymmetry can be induced in this case via the decays of the lightest right-handed neutrino/sneutrino into exotic states even for relatively low reheating temperatures <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>T</mi><mi>R</mi></msub><mo>≲</mo><msup><mn>10</mn><mrow><mn>6</mn><mo>−</mo><mn>7</mn></mrow></msup><mspace width="0.166667em"></mspace><mrow><mi>G</mi><mi>e</mi><mi>V</mi></mrow></mrow></semantics></math></inline-formula>. We argue that there are some regions of the SE<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>6</mn></msub></semantics></math></inline-formula>SSM parameter space, which are safe from all current constraints, and discuss the implications of this model for collider phenomenology.https://www.mdpi.com/2218-1997/9/3/137unified field theories and modelsmodels beyond the standard modelsupersymmetrycold dark matterleptogenesis |
| spellingShingle | Roman Nevzorov Leptogenesis and Dark Matter–Nucleon Scattering Cross Section in the SE<sub>6</sub>SSM Universe unified field theories and models models beyond the standard model supersymmetry cold dark matter leptogenesis |
| title | Leptogenesis and Dark Matter–Nucleon Scattering Cross Section in the SE<sub>6</sub>SSM |
| title_full | Leptogenesis and Dark Matter–Nucleon Scattering Cross Section in the SE<sub>6</sub>SSM |
| title_fullStr | Leptogenesis and Dark Matter–Nucleon Scattering Cross Section in the SE<sub>6</sub>SSM |
| title_full_unstemmed | Leptogenesis and Dark Matter–Nucleon Scattering Cross Section in the SE<sub>6</sub>SSM |
| title_short | Leptogenesis and Dark Matter–Nucleon Scattering Cross Section in the SE<sub>6</sub>SSM |
| title_sort | leptogenesis and dark matter nucleon scattering cross section in the se sub 6 sub ssm |
| topic | unified field theories and models models beyond the standard model supersymmetry cold dark matter leptogenesis |
| url | https://www.mdpi.com/2218-1997/9/3/137 |
| work_keys_str_mv | AT romannevzorov leptogenesisanddarkmatternucleonscatteringcrosssectioninthesesub6subssm |