Coulomb Effects in Momentum-Space Femtoscopy: A Case Study of the K̅Ω System
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 K̅Ω system and present predictions for the singly and doubly negatively charged channels, K̅0Ω- and K-Ω-. 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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BibTeX
@misc{encarnacion2026coulomb,
title = {{Coulomb Effects in Momentum-Space Femtoscopy: A Case Study of the $\barKΩ$ System}},
author = {Pablo Encarnación and Amador García-Lorenzo and Miguel Albaladejo and Albert Feijoo and Juan Nieves and Isaac Vidaña},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2607.11321},
eprint = {2607.11321},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.11321},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Coulomb Effects in Momentum-Space Femtoscopy: A Case Study of the K̅Ω System
AU - Pablo Encarnación
AU - Amador García-Lorenzo
AU - Miguel Albaladejo
AU - Albert Feijoo
AU - Juan Nieves
AU - Isaac Vidaña
PY - 2026
DA - 2026/10/21
PB - arXiv
DO - 10.48550/arxiv.2607.11321
UR - https://arxiv.org/abs/2607.11321
AB - 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 K̅Ω system and present predictions for the singly and doubly negatively charged channels, K̅^0Ω^- and K^-Ω^-. 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.
ER -