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Publication Information
Title $J/\psi$-$p$ Scattering Length from the Total and Differential Photoproduction Cross Sections
Abstract The $J/\psi$-$p$ scattering length, $\alpha_{J/\psi p}$, can be extracted from the $J/\psi$ photoproduction cross section near threshold using the Vector Meson Dominance (VMD) model to relate the reaction $\gamma p \to J/\psi p$ to $J/\psi p \to J/\psi p$. Such estimates based on experimental data result in values for $|\alpha_{J/\psi p}|$, which are much lower than most of the theoretical predictions. In this work, we study the relations between the different results, depending on the use of the total or the differential cross sections, and the method of extrapolating the data to threshold in the case of a low-statistics data sample, such as the near threshold $J/\psi$ photoproduction dataset. We estimate a range for $|\alpha_{J/\psi p}|$ of $0.003$ to $0.025$~fm as extracted from experimental data within the VMD model and discuss possible reasons for such lower values compared to the theoretical results.
Author(s) Lubomir Pentchev, Igor Strakovsky
Publication Date February 2021
Document Type Journal Article
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Exp Nuclear Physics / Experimental Halls / Hall D
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-PHY-20-3237 OSTI Number: 1774778
LANL Number: arXiv:2009.04502 Other Number: DOE/OR/23177-5039
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Journal Article
Journal Name European Physical Journal A
Refereed Yes
Volume 57
Issue
Page(s) 56
Attachments/Datasets/DOI Link
Document(s)
LPentchev_jpsi_sl.pdf (STI Document)
2009.04502.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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