Tetraquarks in the Born-Oppenheimer approximation
Abstract The conventional loosely bound molecule interpretation of the X(3872) is not compatible with the recent LHCb experimental measurement of the ratio of branching fractions R $$ \mathcal{R} $$ = Br(X → ψ′γ)/Br(X → ψγ). We systematically determine the entire tetraquark spectrum for J = 0, 1, 2...
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| Language: | English |
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SpringerOpen
2025-04-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP04(2025)004 |
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| author | D. Germani B. Grinstein A. D. Polosa |
| author_facet | D. Germani B. Grinstein A. D. Polosa |
| author_sort | D. Germani |
| collection | DOAJ |
| description | Abstract The conventional loosely bound molecule interpretation of the X(3872) is not compatible with the recent LHCb experimental measurement of the ratio of branching fractions R $$ \mathcal{R} $$ = Br(X → ψ′γ)/Br(X → ψγ). We systematically determine the entire tetraquark spectrum for J = 0, 1, 2 and refine the calculation of R $$ \mathcal{R} $$ in an improved Born-Oppenheimer description of the X(3872) compact tetraquark. This refinement yields a significantly better agreement with experimental data on R $$ \mathcal{R} $$ and on the spectroscopy of the states themselves. Extending the diquark-antidiquark paradigm to encompass tetraquarks that are linear super-positions of open charm singlets and color octets, we discover that these exotic resonances manifest as compact shallow bound states of quarks in color force potentials. |
| format | Article |
| id | doaj-art-826b5895788040beb6abfe57ceca2821 |
| institution | OA Journals |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-826b5895788040beb6abfe57ceca28212025-08-20T02:15:00ZengSpringerOpenJournal of High Energy Physics1029-84792025-04-012025413110.1007/JHEP04(2025)004Tetraquarks in the Born-Oppenheimer approximationD. Germani0B. Grinstein1A. D. Polosa2Università degli Studi di Roma La Sapienza and INFN Section of Roma 1University of California, San DiegoUniversità degli Studi di Roma La Sapienza and INFN Section of Roma 1Abstract The conventional loosely bound molecule interpretation of the X(3872) is not compatible with the recent LHCb experimental measurement of the ratio of branching fractions R $$ \mathcal{R} $$ = Br(X → ψ′γ)/Br(X → ψγ). We systematically determine the entire tetraquark spectrum for J = 0, 1, 2 and refine the calculation of R $$ \mathcal{R} $$ in an improved Born-Oppenheimer description of the X(3872) compact tetraquark. This refinement yields a significantly better agreement with experimental data on R $$ \mathcal{R} $$ and on the spectroscopy of the states themselves. Extending the diquark-antidiquark paradigm to encompass tetraquarks that are linear super-positions of open charm singlets and color octets, we discover that these exotic resonances manifest as compact shallow bound states of quarks in color force potentials.https://doi.org/10.1007/JHEP04(2025)004Effective Field Theories of QCDQuarkoniumSpecific QCD Phenomenology |
| spellingShingle | D. Germani B. Grinstein A. D. Polosa Tetraquarks in the Born-Oppenheimer approximation Journal of High Energy Physics Effective Field Theories of QCD Quarkonium Specific QCD Phenomenology |
| title | Tetraquarks in the Born-Oppenheimer approximation |
| title_full | Tetraquarks in the Born-Oppenheimer approximation |
| title_fullStr | Tetraquarks in the Born-Oppenheimer approximation |
| title_full_unstemmed | Tetraquarks in the Born-Oppenheimer approximation |
| title_short | Tetraquarks in the Born-Oppenheimer approximation |
| title_sort | tetraquarks in the born oppenheimer approximation |
| topic | Effective Field Theories of QCD Quarkonium Specific QCD Phenomenology |
| url | https://doi.org/10.1007/JHEP04(2025)004 |
| work_keys_str_mv | AT dgermani tetraquarksinthebornoppenheimerapproximation AT bgrinstein tetraquarksinthebornoppenheimerapproximation AT adpolosa tetraquarksinthebornoppenheimerapproximation |