Alignment limit in 2HDM: robustness put to test
Abstract In a two-Higgs-doublet model (2HDM), at the vicinity of the alignment limit, the extra contributions to the couplings of the SM-like Higgs with other particles can be subdominant to the same coming from the six dimensional operators. In this context, we revisit the alignment limit itself. I...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-09-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP09(2018)142 |
| _version_ | 1819018707836338176 |
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| author | Siddhartha Karmakar Subhendu Rakshit |
| author_facet | Siddhartha Karmakar Subhendu Rakshit |
| author_sort | Siddhartha Karmakar |
| collection | DOAJ |
| description | Abstract In a two-Higgs-doublet model (2HDM), at the vicinity of the alignment limit, the extra contributions to the couplings of the SM-like Higgs with other particles can be subdominant to the same coming from the six dimensional operators. In this context, we revisit the alignment limit itself. It is investigated to what extent these operators can mask the actual alignment in a 2HDM. The bosonic operators which rescale the Higgs kinetic terms can lead to substantial change in the parameter space of the model. We find that some other bosonic operators, which are severely constrained from the electroweak precision tests, can also modify the parameter space of 2HDM due to their anomalous momentum structures. A particular kind of Little Higgs model is explored as an example of 2HDM effective field theory in connection with 2HDM alignment. Choosing a suitable benchmark point in a Type-II 2HDM, we highlight the possibility that the exact alignment limit is ruled out at 95% CL in presence of such operators. |
| first_indexed | 2024-12-21T03:23:42Z |
| format | Article |
| id | doaj.art-1256357a5b1641329ad7866564f637f1 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-21T03:23:42Z |
| publishDate | 2018-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-1256357a5b1641329ad7866564f637f12022-12-21T19:17:39ZengSpringerOpenJournal of High Energy Physics1029-84792018-09-012018912510.1007/JHEP09(2018)142Alignment limit in 2HDM: robustness put to testSiddhartha Karmakar0Subhendu Rakshit1Discipline of Physics, Indian Institute of Technology IndoreDiscipline of Physics, Indian Institute of Technology IndoreAbstract In a two-Higgs-doublet model (2HDM), at the vicinity of the alignment limit, the extra contributions to the couplings of the SM-like Higgs with other particles can be subdominant to the same coming from the six dimensional operators. In this context, we revisit the alignment limit itself. It is investigated to what extent these operators can mask the actual alignment in a 2HDM. The bosonic operators which rescale the Higgs kinetic terms can lead to substantial change in the parameter space of the model. We find that some other bosonic operators, which are severely constrained from the electroweak precision tests, can also modify the parameter space of 2HDM due to their anomalous momentum structures. A particular kind of Little Higgs model is explored as an example of 2HDM effective field theory in connection with 2HDM alignment. Choosing a suitable benchmark point in a Type-II 2HDM, we highlight the possibility that the exact alignment limit is ruled out at 95% CL in presence of such operators.http://link.springer.com/article/10.1007/JHEP09(2018)142Phenomenology of Field Theories in Higher Dimensions |
| spellingShingle | Siddhartha Karmakar Subhendu Rakshit Alignment limit in 2HDM: robustness put to test Journal of High Energy Physics Phenomenology of Field Theories in Higher Dimensions |
| title | Alignment limit in 2HDM: robustness put to test |
| title_full | Alignment limit in 2HDM: robustness put to test |
| title_fullStr | Alignment limit in 2HDM: robustness put to test |
| title_full_unstemmed | Alignment limit in 2HDM: robustness put to test |
| title_short | Alignment limit in 2HDM: robustness put to test |
| title_sort | alignment limit in 2hdm robustness put to test |
| topic | Phenomenology of Field Theories in Higher Dimensions |
| url | http://link.springer.com/article/10.1007/JHEP09(2018)142 |
| work_keys_str_mv | AT siddharthakarmakar alignmentlimitin2hdmrobustnessputtotest AT subhendurakshit alignmentlimitin2hdmrobustnessputtotest |