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Author  |
Danilkin, I.; Deineka, O.; Passemar, E.; Vanderhaeghen, M. |
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Title |
Coupled-channel Omnès matrix for the D-wave isoscalar ππ/KK system and its application to J/ψ → π0π0γ, KSKSγ |
Type |
Journal Article |
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Year |
2026 |
Publication |
Physics Letters B |
Abbreviated Journal |
Phys. Lett. B |
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Volume |
875 |
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Pages |
140327 - 8pp |
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Abstract |
In this work, we construct the D-wave isoscalar (sic)(sic)/KK coupled-channel Omn & egrave;s matrix, formulated to satisfy unitarity, analyticity, and the appropriate asymptotic behavior. We employ a two-channel K-matrix model containing poles associated with the f(2)(1270) and f (1525) resonances. The resulting unitary scattering matrix, which reproduces the experimental pi pi pi pi and (sic)(sic) -> KK data and PDG information, serves as input to the homogeneous two-channel Muskhelishvili-Omn & egrave;s equation. We compare our Omn & egrave;s matrix with previous constructions based on (sic)(sic) -> KK phases extracted from sums of Breit-Wigner amplitudes. The Omn & egrave;s matrix developed here provides a reliable dispersive input for form-factor calculations and resonance studies in the tensor-meson sector. As an application, we show that it enables a simultaneous and accurate description of the BESIII J/ -> pi pi omicron y and J/psi – KsKsy spectra in the J = 2 electric-dipole (E1) partial wave. |
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Address |
[Danilkin, Igor; Deineka, Oleksandra; Vanderhaeghen, Marc] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany, Email: danilkin@uni-mainz.de; |
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Publisher |
Elsevier |
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Language |
English |
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ISSN |
0370-2693 |
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Notes |
WOS:001716247800001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7145 |
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