The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model
In the extended scalar sector of the SMASH (Standard Model - Axion-Seesaw-Higgs portal inflation) framework, we conduct a phenomenological investigation of the observable effects. In a suitable region of the SMASH scalar parameter spaces, we solve the vacuum metastability problem and discuss the one...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-01-01
|
| Series: | Universe |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-1997/9/1/43 |
| _version_ | 1827621484899598336 |
|---|---|
| author | C.R. Das Katri Huitu Timo J. Kärkkäinen |
| author_facet | C.R. Das Katri Huitu Timo J. Kärkkäinen |
| author_sort | C.R. Das |
| collection | DOAJ |
| description | In the extended scalar sector of the SMASH (Standard Model - Axion-Seesaw-Higgs portal inflation) framework, we conduct a phenomenological investigation of the observable effects. In a suitable region of the SMASH scalar parameter spaces, we solve the vacuum metastability problem and discuss the one-loop correction to the triple Higgs coupling, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>λ</mi><mrow><mi>H</mi><mi>H</mi><mi>H</mi></mrow></msub></semantics></math></inline-formula>. The <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>λ</mi><mrow><mi>H</mi><mi>H</mi><mi>H</mi></mrow></msub></semantics></math></inline-formula> and SM Higgs quartic coupling <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>λ</mi><mi>H</mi></msub></semantics></math></inline-formula> corrections are found to be proportional to the threshold correction. A large <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>λ</mi><mrow><mi>H</mi><mi>H</mi><mi>H</mi></mrow></msub></semantics></math></inline-formula> correction (≳5%) implies vacuum instability in the model and thus limits the general class of theories that use threshold correction. We performed a full two-loop renormalization group analysis of the SMASH model. The SMASH framework has also been used to estimate the evolution of lepton asymmetry in the universe. |
| first_indexed | 2024-03-09T11:05:11Z |
| format | Article |
| id | doaj.art-752f0151584b4722bfed9a5b2cfb2cec |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T11:05:11Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-752f0151584b4722bfed9a5b2cfb2cec2023-12-01T00:59:23ZengMDPI AGUniverse2218-19972023-01-01914310.3390/universe9010043The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) ModelC.R. Das0Katri Huitu1Timo J. Kärkkäinen2Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research – International Intergovernmental Organization, Joliot-Curie 6, 141980 Dubna, Moscow Region, RussiaDepartment of Physics and Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, FinlandLaboratory of High Energy and Computational Physics, National Institute of Chemical Physics and Biophysics, Rävala 10, 10143 Tallinn, EstoniaIn the extended scalar sector of the SMASH (Standard Model - Axion-Seesaw-Higgs portal inflation) framework, we conduct a phenomenological investigation of the observable effects. In a suitable region of the SMASH scalar parameter spaces, we solve the vacuum metastability problem and discuss the one-loop correction to the triple Higgs coupling, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>λ</mi><mrow><mi>H</mi><mi>H</mi><mi>H</mi></mrow></msub></semantics></math></inline-formula>. The <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>λ</mi><mrow><mi>H</mi><mi>H</mi><mi>H</mi></mrow></msub></semantics></math></inline-formula> and SM Higgs quartic coupling <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>λ</mi><mi>H</mi></msub></semantics></math></inline-formula> corrections are found to be proportional to the threshold correction. A large <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>λ</mi><mrow><mi>H</mi><mi>H</mi><mi>H</mi></mrow></msub></semantics></math></inline-formula> correction (≳5%) implies vacuum instability in the model and thus limits the general class of theories that use threshold correction. We performed a full two-loop renormalization group analysis of the SMASH model. The SMASH framework has also been used to estimate the evolution of lepton asymmetry in the universe.https://www.mdpi.com/2218-1997/9/1/43Higgs portal inflationbeyond the standard modelSMASHHiggs triple couplingHiggs trilinear coupling |
| spellingShingle | C.R. Das Katri Huitu Timo J. Kärkkäinen The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model Universe Higgs portal inflation beyond the standard model SMASH Higgs triple coupling Higgs trilinear coupling |
| title | The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model |
| title_full | The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model |
| title_fullStr | The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model |
| title_full_unstemmed | The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model |
| title_short | The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model |
| title_sort | higgs trilinear coupling and the scale of new physics for the sm axion seesaw higgs portal inflation smash model |
| topic | Higgs portal inflation beyond the standard model SMASH Higgs triple coupling Higgs trilinear coupling |
| url | https://www.mdpi.com/2218-1997/9/1/43 |
| work_keys_str_mv | AT crdas thehiggstrilinearcouplingandthescaleofnewphysicsforthesmaxionseesawhiggsportalinflationsmashmodel AT katrihuitu thehiggstrilinearcouplingandthescaleofnewphysicsforthesmaxionseesawhiggsportalinflationsmashmodel AT timojkarkkainen thehiggstrilinearcouplingandthescaleofnewphysicsforthesmaxionseesawhiggsportalinflationsmashmodel AT crdas higgstrilinearcouplingandthescaleofnewphysicsforthesmaxionseesawhiggsportalinflationsmashmodel AT katrihuitu higgstrilinearcouplingandthescaleofnewphysicsforthesmaxionseesawhiggsportalinflationsmashmodel AT timojkarkkainen higgstrilinearcouplingandthescaleofnewphysicsforthesmaxionseesawhiggsportalinflationsmashmodel |