Non-derivative axionic couplings to nucleons at large and small N
Abstract Among the possible CP-odd couplings of the axion to ordinary matter, the most relevant ones for phenomenology are the Yukawa couplings to nucleons. We analyze such non-derivative couplings within three different approaches: standard effective field theory, the Skyrme model and holographic Q...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2020)100 |
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| author | Francesco Bigazzi Aldo L. Cotrone Matti Järvinen Elias Kiritsis |
| author_facet | Francesco Bigazzi Aldo L. Cotrone Matti Järvinen Elias Kiritsis |
| author_sort | Francesco Bigazzi |
| collection | DOAJ |
| description | Abstract Among the possible CP-odd couplings of the axion to ordinary matter, the most relevant ones for phenomenology are the Yukawa couplings to nucleons. We analyze such non-derivative couplings within three different approaches: standard effective field theory, the Skyrme model and holographic QCD. In all the cases, the couplings can be related to the CP-odd non-derivative couplings to nucleons of the low-lying mesons and the η′. Using the effective field theory approach we discuss how to derive the expressions for the CP-odd interaction terms as functions of the parameters of the effective Lagrangian at generic number of colors Nc and flavors Nf. Then, we compute the CP-odd couplings to nucleons of the axion, the η′ and the pseudo-Goldstone mesons in both the Skyrme and the holographic QCD model with Nf = 2, 3. We present model-independent expressions for the coefficients of the non-derivative axion-nucleon couplings. This allows us to provide quantitative estimates of these couplings. |
| format | Article |
| id | doaj-art-34985f74edb643a4be21987c83729733 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-34985f74edb643a4be21987c837297332025-02-09T12:06:41ZengSpringerOpenJournal of High Energy Physics1029-84792020-01-012020116310.1007/JHEP01(2020)100Non-derivative axionic couplings to nucleons at large and small NFrancesco Bigazzi0Aldo L. Cotrone1Matti Järvinen2Elias Kiritsis3INFN, Sezione di FirenzeINFN, Sezione di FirenzeInstitute for Theoretical Physics, Utrecht UniversityCrete Center for Theoretical Physics, Department of Physics, University of CreteAbstract Among the possible CP-odd couplings of the axion to ordinary matter, the most relevant ones for phenomenology are the Yukawa couplings to nucleons. We analyze such non-derivative couplings within three different approaches: standard effective field theory, the Skyrme model and holographic QCD. In all the cases, the couplings can be related to the CP-odd non-derivative couplings to nucleons of the low-lying mesons and the η′. Using the effective field theory approach we discuss how to derive the expressions for the CP-odd interaction terms as functions of the parameters of the effective Lagrangian at generic number of colors Nc and flavors Nf. Then, we compute the CP-odd couplings to nucleons of the axion, the η′ and the pseudo-Goldstone mesons in both the Skyrme and the holographic QCD model with Nf = 2, 3. We present model-independent expressions for the coefficients of the non-derivative axion-nucleon couplings. This allows us to provide quantitative estimates of these couplings.https://doi.org/10.1007/JHEP01(2020)100Chiral LagrangiansCosmology of Theories beyond the SMGauge-gravity correspondence1/N Expansion |
| spellingShingle | Francesco Bigazzi Aldo L. Cotrone Matti Järvinen Elias Kiritsis Non-derivative axionic couplings to nucleons at large and small N Journal of High Energy Physics Chiral Lagrangians Cosmology of Theories beyond the SM Gauge-gravity correspondence 1/N Expansion |
| title | Non-derivative axionic couplings to nucleons at large and small N |
| title_full | Non-derivative axionic couplings to nucleons at large and small N |
| title_fullStr | Non-derivative axionic couplings to nucleons at large and small N |
| title_full_unstemmed | Non-derivative axionic couplings to nucleons at large and small N |
| title_short | Non-derivative axionic couplings to nucleons at large and small N |
| title_sort | non derivative axionic couplings to nucleons at large and small n |
| topic | Chiral Lagrangians Cosmology of Theories beyond the SM Gauge-gravity correspondence 1/N Expansion |
| url | https://doi.org/10.1007/JHEP01(2020)100 |
| work_keys_str_mv | AT francescobigazzi nonderivativeaxioniccouplingstonucleonsatlargeandsmalln AT aldolcotrone nonderivativeaxioniccouplingstonucleonsatlargeandsmalln AT mattijarvinen nonderivativeaxioniccouplingstonucleonsatlargeandsmalln AT eliaskiritsis nonderivativeaxioniccouplingstonucleonsatlargeandsmalln |