Flavour deconstructing the composite Higgs
Abstract We present a flavour non-universal extension of the Standard Model combined with the idea of Higgs compositeness. At the TeV scale, the gauge groups SU(2) R and U(1) B−L are assumed to act in a non-universal manner on light- and third-generation fermions, while the Higgs emerges as a pseudo...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2025)041 |
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| author | Sebastiano Covone Joe Davighi Gino Isidori Marko Pesut |
| author_facet | Sebastiano Covone Joe Davighi Gino Isidori Marko Pesut |
| author_sort | Sebastiano Covone |
| collection | DOAJ |
| description | Abstract We present a flavour non-universal extension of the Standard Model combined with the idea of Higgs compositeness. At the TeV scale, the gauge groups SU(2) R and U(1) B−L are assumed to act in a non-universal manner on light- and third-generation fermions, while the Higgs emerges as a pseudo Nambu-Goldstone boson of the spontaneous global symmetry breaking Sp(4) → SU(2) L × SU 2 R 3 $$ \textrm{SU}{(2)}_R^{\left[3\right]} $$ , attributed to new strong dynamics. The flavour deconstruction means the couplings of the light families to the composite sector (and therefore the pNGB Higgs) are suppressed by powers of a heavy mass scale (from which the Higgs is nevertheless shielded by compositeness), explaining the flavour puzzle. We present a detailed analysis of the radiatively generated Higgs potential, showing how this intrinsically-flavoured framework has the ingredients to justify the unavoidable tuning in the Higgs potential necessary to separate electroweak and composite scales. This happens for large enough values of the SU 2 R 3 $$ \textrm{SU}{(2)}_R^{\left[3\right]} $$ gauge coupling and light enough flavoured gauge bosons resulting from the deconstruction, whose phenomenology is also investigated. The model is compatible with current experimental bounds and predicts new states at the TeV scale, which are within the reach of near future experimental searches. |
| format | Article |
| id | doaj-art-2e6594bce4a7468e9991e2e398e2fdf1 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-2e6594bce4a7468e9991e2e398e2fdf12025-01-19T12:06:52ZengSpringerOpenJournal of High Energy Physics1029-84792025-01-012025113610.1007/JHEP01(2025)041Flavour deconstructing the composite HiggsSebastiano Covone0Joe Davighi1Gino Isidori2Marko Pesut3Physik-Institut, Universität ZürichTheoretical Physics Department, CERNPhysik-Institut, Universität ZürichPhysik-Institut, Universität ZürichAbstract We present a flavour non-universal extension of the Standard Model combined with the idea of Higgs compositeness. At the TeV scale, the gauge groups SU(2) R and U(1) B−L are assumed to act in a non-universal manner on light- and third-generation fermions, while the Higgs emerges as a pseudo Nambu-Goldstone boson of the spontaneous global symmetry breaking Sp(4) → SU(2) L × SU 2 R 3 $$ \textrm{SU}{(2)}_R^{\left[3\right]} $$ , attributed to new strong dynamics. The flavour deconstruction means the couplings of the light families to the composite sector (and therefore the pNGB Higgs) are suppressed by powers of a heavy mass scale (from which the Higgs is nevertheless shielded by compositeness), explaining the flavour puzzle. We present a detailed analysis of the radiatively generated Higgs potential, showing how this intrinsically-flavoured framework has the ingredients to justify the unavoidable tuning in the Higgs potential necessary to separate electroweak and composite scales. This happens for large enough values of the SU 2 R 3 $$ \textrm{SU}{(2)}_R^{\left[3\right]} $$ gauge coupling and light enough flavoured gauge bosons resulting from the deconstruction, whose phenomenology is also investigated. The model is compatible with current experimental bounds and predicts new states at the TeV scale, which are within the reach of near future experimental searches.https://doi.org/10.1007/JHEP01(2025)041Bottom QuarksCompositenessFlavour SymmetriesNew Gauge Interactions |
| spellingShingle | Sebastiano Covone Joe Davighi Gino Isidori Marko Pesut Flavour deconstructing the composite Higgs Journal of High Energy Physics Bottom Quarks Compositeness Flavour Symmetries New Gauge Interactions |
| title | Flavour deconstructing the composite Higgs |
| title_full | Flavour deconstructing the composite Higgs |
| title_fullStr | Flavour deconstructing the composite Higgs |
| title_full_unstemmed | Flavour deconstructing the composite Higgs |
| title_short | Flavour deconstructing the composite Higgs |
| title_sort | flavour deconstructing the composite higgs |
| topic | Bottom Quarks Compositeness Flavour Symmetries New Gauge Interactions |
| url | https://doi.org/10.1007/JHEP01(2025)041 |
| work_keys_str_mv | AT sebastianocovone flavourdeconstructingthecompositehiggs AT joedavighi flavourdeconstructingthecompositehiggs AT ginoisidori flavourdeconstructingthecompositehiggs AT markopesut flavourdeconstructingthecompositehiggs |