Testing the light scalar meson as a non- q q ¯ $$ q\overline{q} $$ state in semileptonic D decays
Abstract While the light scalar mesons (S 0) are considered to be either ordinary q q ¯ $$ q\overline{q} $$ or exotic tetraquark states, we investigate the semileptonic decays D → S 0 e + ν e , by taking into account the resonant effects of S 0 → M 1 M 2, where S 0 = a 0(980), f 0(980), and f 0(500)...
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2024-12-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP12(2024)226 |
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| author | Yu-Kuo Hsiao Shu-Qi Yang Wen-Juan Wei Bai-Cian Ke |
| author_facet | Yu-Kuo Hsiao Shu-Qi Yang Wen-Juan Wei Bai-Cian Ke |
| author_sort | Yu-Kuo Hsiao |
| collection | DOAJ |
| description | Abstract While the light scalar mesons (S 0) are considered to be either ordinary q q ¯ $$ q\overline{q} $$ or exotic tetraquark states, we investigate the semileptonic decays D → S 0 e + ν e , by taking into account the resonant effects of S 0 → M 1 M 2, where S 0 = a 0(980), f 0(980), and f 0(500)/σ 0, and M 1(2) represents a pseudoscalar meson. For the first time, the D → S 0 form factors in the two quark structures are both presented. Subsequently, we calculate B $$ \mathcal{B} $$ ( D s + $$ {D}_s^{+} $$ → σ 0 e + ν e , σ 0 → π + π − ) = (20.3 ± 1.8 ± 0.5) × 10 −4 in the q q ¯ $$ q\overline{q} $$ structure, showing significant 9σ deviations from the experimental upper limit of 3.3 × 10 −4. In contrast, B $$ \mathcal{B} $$ ( D s + $$ {D}_s^{+} $$ → σ 0 e + ν e , σ 0 → π + π − ) = ( 0.58 − 0.57 + 1.43 $$ {0.58}_{-0.57}^{+1.43} $$ ± 0.01) × 10 −4 in the q 2 q ¯ 2 $$ {q}^2{\overline{q}}^2 $$ structure is within the allowed experimental range. Clearly, the light scalar meson is tested as a non- q q ¯ $$ q\overline{q} $$ state. We hence demonstrate a highly sensitive new approach for exploring the true nature of scalar mesons, which can be extended to non-leptonic D decays as well as B meson decays. |
| format | Article |
| id | doaj-art-33e9759c1cf64e6ab0ba65ac47796ef5 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-33e9759c1cf64e6ab0ba65ac47796ef52025-02-02T12:06:13ZengSpringerOpenJournal of High Energy Physics1029-84792024-12-0120241211710.1007/JHEP12(2024)226Testing the light scalar meson as a non- q q ¯ $$ q\overline{q} $$ state in semileptonic D decaysYu-Kuo Hsiao0Shu-Qi Yang1Wen-Juan Wei2Bai-Cian Ke3School of Physics and Information Engineering, Shanxi Normal UniversitySchool of Physics and Information Engineering, Shanxi Normal UniversitySchool of Physics and Information Engineering, Shanxi Normal UniversitySchool of Physics and Microelectronics, Zhengzhou UniversityAbstract While the light scalar mesons (S 0) are considered to be either ordinary q q ¯ $$ q\overline{q} $$ or exotic tetraquark states, we investigate the semileptonic decays D → S 0 e + ν e , by taking into account the resonant effects of S 0 → M 1 M 2, where S 0 = a 0(980), f 0(980), and f 0(500)/σ 0, and M 1(2) represents a pseudoscalar meson. For the first time, the D → S 0 form factors in the two quark structures are both presented. Subsequently, we calculate B $$ \mathcal{B} $$ ( D s + $$ {D}_s^{+} $$ → σ 0 e + ν e , σ 0 → π + π − ) = (20.3 ± 1.8 ± 0.5) × 10 −4 in the q q ¯ $$ q\overline{q} $$ structure, showing significant 9σ deviations from the experimental upper limit of 3.3 × 10 −4. In contrast, B $$ \mathcal{B} $$ ( D s + $$ {D}_s^{+} $$ → σ 0 e + ν e , σ 0 → π + π − ) = ( 0.58 − 0.57 + 1.43 $$ {0.58}_{-0.57}^{+1.43} $$ ± 0.01) × 10 −4 in the q 2 q ¯ 2 $$ {q}^2{\overline{q}}^2 $$ structure is within the allowed experimental range. Clearly, the light scalar meson is tested as a non- q q ¯ $$ q\overline{q} $$ state. We hence demonstrate a highly sensitive new approach for exploring the true nature of scalar mesons, which can be extended to non-leptonic D decays as well as B meson decays.https://doi.org/10.1007/JHEP12(2024)226Flavour SymmetriesProperties of HadronsSemi-Leptonic DecaysThe Strong Coupling |
| spellingShingle | Yu-Kuo Hsiao Shu-Qi Yang Wen-Juan Wei Bai-Cian Ke Testing the light scalar meson as a non- q q ¯ $$ q\overline{q} $$ state in semileptonic D decays Journal of High Energy Physics Flavour Symmetries Properties of Hadrons Semi-Leptonic Decays The Strong Coupling |
| title | Testing the light scalar meson as a non- q q ¯ $$ q\overline{q} $$ state in semileptonic D decays |
| title_full | Testing the light scalar meson as a non- q q ¯ $$ q\overline{q} $$ state in semileptonic D decays |
| title_fullStr | Testing the light scalar meson as a non- q q ¯ $$ q\overline{q} $$ state in semileptonic D decays |
| title_full_unstemmed | Testing the light scalar meson as a non- q q ¯ $$ q\overline{q} $$ state in semileptonic D decays |
| title_short | Testing the light scalar meson as a non- q q ¯ $$ q\overline{q} $$ state in semileptonic D decays |
| title_sort | testing the light scalar meson as a non q q ¯ q overline q state in semileptonic d decays |
| topic | Flavour Symmetries Properties of Hadrons Semi-Leptonic Decays The Strong Coupling |
| url | https://doi.org/10.1007/JHEP12(2024)226 |
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