| Autor: |
Deineka Oleksandra, Danilkin Igor, Vanderhaeghen Marc |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
EPJ Web of Conferences, Vol 291, p 02011 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2100-014X |
| DOI: |
10.1051/epjconf/202429102011 |
| Popis: |
A dispersive implementation of the a0(980) resonance to (𝑔 − 2)µ requires the knowledge of the double-virtual S-wave γ * γ * → πη / KK¯I = 1 am plitudes. To obtain these amplitudes we used a modified coupled-channel Muskhelishvili-Omnès formalism, with the input from the left-hand cuts and the hadronic Omnès function. The latter were obtained using a data-driven N/D method in which the fits were performed to the different sets of experimental data on two-photon fusion processes with πη and KK¯ final states. This yields the preliminary dispersive estimate aμHLbL[a0(980)]resc. = -0.46(2) × 10-11. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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