Collider and astrophysical signatures of light scalars with enhanced τ couplings
Abstract Beyond Standard Model scenarios addressing the flavor puzzle and the hierarchy problem generally predict dominant new physics couplings with fermions of the third generation. In this Letter, we explore the collider and astrophysical signatures of new light scalar and pseudoscalar particles...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-06-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP06(2025)008 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849767308203917312 |
|---|---|
| author | Jorge Alda Gabriele Levati Paride Paradisi Stefano Rigolin Nudžeim Selimović |
| author_facet | Jorge Alda Gabriele Levati Paride Paradisi Stefano Rigolin Nudžeim Selimović |
| author_sort | Jorge Alda |
| collection | DOAJ |
| description | Abstract Beyond Standard Model scenarios addressing the flavor puzzle and the hierarchy problem generally predict dominant new physics couplings with fermions of the third generation. In this Letter, we explore the collider and astrophysical signatures of new light scalar and pseudoscalar particles dominantly coupled to the τ-lepton. The best experimental prospects are expected at Belle II through the e + e − → τ + τ − γγ, τ + τ − γ, 3γ, mono–γ processes, and the τ anomalous magnetic moment. The correlated effects in these searches can unambiguously point toward the underlying new physics dynamics. Moreover, we study astrophysics bounds — especially from core-collapse supernovae and neutron star mergers — finding them particularly effective and complementary to collider bounds. We carry out this program in the well-motivated context of axion-like particles as well as generic CP-even and CP-odd particles, highlighting possible ways to discriminate among them. |
| format | Article |
| id | doaj-art-b47ce2c7e12146d5824daf523e616d52 |
| institution | DOAJ |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-b47ce2c7e12146d5824daf523e616d522025-08-20T03:04:16ZengSpringerOpenJournal of High Energy Physics1029-84792025-06-012025612310.1007/JHEP06(2025)008Collider and astrophysical signatures of light scalars with enhanced τ couplingsJorge Alda0Gabriele Levati1Paride Paradisi2Stefano Rigolin3Nudžeim Selimović4Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università degli Studi di PadovaDipartimento di Fisica e Astronomia “Galileo Galilei”, Università degli Studi di PadovaDipartimento di Fisica e Astronomia “Galileo Galilei”, Università degli Studi di PadovaDipartimento di Fisica e Astronomia “Galileo Galilei”, Università degli Studi di PadovaIstituto Nazionale di Fisica Nucleare (INFN), Sezione di PadovaAbstract Beyond Standard Model scenarios addressing the flavor puzzle and the hierarchy problem generally predict dominant new physics couplings with fermions of the third generation. In this Letter, we explore the collider and astrophysical signatures of new light scalar and pseudoscalar particles dominantly coupled to the τ-lepton. The best experimental prospects are expected at Belle II through the e + e − → τ + τ − γγ, τ + τ − γ, 3γ, mono–γ processes, and the τ anomalous magnetic moment. The correlated effects in these searches can unambiguously point toward the underlying new physics dynamics. Moreover, we study astrophysics bounds — especially from core-collapse supernovae and neutron star mergers — finding them particularly effective and complementary to collider bounds. We carry out this program in the well-motivated context of axion-like particles as well as generic CP-even and CP-odd particles, highlighting possible ways to discriminate among them.https://doi.org/10.1007/JHEP06(2025)008Axions and ALPsNew Light ParticlesSpecific BSM Phenomenology |
| spellingShingle | Jorge Alda Gabriele Levati Paride Paradisi Stefano Rigolin Nudžeim Selimović Collider and astrophysical signatures of light scalars with enhanced τ couplings Journal of High Energy Physics Axions and ALPs New Light Particles Specific BSM Phenomenology |
| title | Collider and astrophysical signatures of light scalars with enhanced τ couplings |
| title_full | Collider and astrophysical signatures of light scalars with enhanced τ couplings |
| title_fullStr | Collider and astrophysical signatures of light scalars with enhanced τ couplings |
| title_full_unstemmed | Collider and astrophysical signatures of light scalars with enhanced τ couplings |
| title_short | Collider and astrophysical signatures of light scalars with enhanced τ couplings |
| title_sort | collider and astrophysical signatures of light scalars with enhanced τ couplings |
| topic | Axions and ALPs New Light Particles Specific BSM Phenomenology |
| url | https://doi.org/10.1007/JHEP06(2025)008 |
| work_keys_str_mv | AT jorgealda colliderandastrophysicalsignaturesoflightscalarswithenhancedtcouplings AT gabrielelevati colliderandastrophysicalsignaturesoflightscalarswithenhancedtcouplings AT parideparadisi colliderandastrophysicalsignaturesoflightscalarswithenhancedtcouplings AT stefanorigolin colliderandastrophysicalsignaturesoflightscalarswithenhancedtcouplings AT nudzeimselimovic colliderandastrophysicalsignaturesoflightscalarswithenhancedtcouplings |