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Author  |
Encarnación, P.; García-Lorenzo, A.; Albaladejo, M.; Feijoo, A.; Nieves, J.; Vidaña, I. |
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Title |
Coulomb effects in momentum-space femtoscopy: A case study of the K-Ω system |
Type |
Journal Article |
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Year |
2026 |
Publication |
Physics Letters B |
Abbreviated Journal |
Phys. Lett. B |
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Volume |
882 |
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Pages |
141041 - 11pp |
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Keywords |
Effective field theory; Meson-baryon interactions; Femtoscopy; Correlation function |
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Abstract |
We present a momentum-space framework for the consistent treatment of Coulomb interactions in femtoscopic correlation functions based on a modified Vincent-Phatak method that is more amenable to numerical implementation. The formalism provides a practical approach to incorporating Coulomb effects at the short distances relevant for femtoscopy within the Lippmann-Schwinger equation, while preserving a unified treatment of the strong interaction. As an application, we study the S = -4 pseudoscalar-baryon decuplet interaction in the K52 system and present predictions for the singly and doubly negatively charged channels, K052-and K-52-. As an additional validation of the formalism, we have also applied it to the well-studied pp system. We further assess the limitations of the asymptotic wave-function approximation and quantify corrections accounting for the short-distance structure of the interaction potential. We introduce a phenomenological parameter that effectively absorbs contributions from both the finite source size and the off-shell structure of the interaction, the latter being one of the main obstacles to extracting detailed information on hadron-hadron interactions from femtoscopic measurements in a model-independent way. |
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Address |
[Encarnacion, Pablo; Feijoo, Albert] Inst Invest Paterna, Ctr Mixto Univ Valencia, Dept Fis Teorica, CSIC, Aptdo 22085, E-46071 Valencia, Spain, Email: Pablo.Encarnacion@ific.uv.es; |
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Publisher |
Elsevier |
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Language |
English |
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Original Title |
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Edition |
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ISSN |
0370-2693 |
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Notes |
WOS:001908292200001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7499 |
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