Light-front transverse profiles of scalar and spin-two chromoelectric EMT responses in near-threshold charmonium probes
Abstract
I construct light-front transverse profile functions for the scalar and spin-two chromoelectric energy-momentum-tensor responses selected by compact-charmonium probes of the proton. The scalar branch is the anomaly and sigma amplitude, while the spin-two branch contains the gravitational combination 3Bi(t)−Di(t)=6Ji(t)−3Ai(t)−Di(t) rather than Ai(t) alone. In the Drell-Yan frame, these two amplitudes define normalized transverse response profiles whose integrated ratio reproduces the forward light-front spin-two/scalar strength, while the finite transverse-distance behavior is sensitive to the relative scalar and gravitational slopes. The construction gives a spatial representation of the chromoelectric EMT projection without interpreting a measured near-threshold slope as a model-independent static three-dimensional mass radius.
Versions
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BibTeX
@misc{syamtomov2026lightfront,
title = {{Light-front transverse profiles of scalar and spin-two chromoelectric EMT responses in near-threshold charmonium probes}},
author = {Arkadiy I. Syamtomov},
howpublished = {arXiv},
year = {2026},
month = jul,
doi = {10.48550/arxiv.2606.14304},
eprint = {2606.14304},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2606.14304},
}
RIS
TY - UNPB
TI - Light-front transverse profiles of scalar and spin-two chromoelectric EMT responses in near-threshold charmonium probes
AU - Arkadiy I. Syamtomov
PY - 2026
DA - 2026/07/10
PB - arXiv
DO - 10.48550/arxiv.2606.14304
UR - https://arxiv.org/abs/2606.14304
AB - I construct light-front transverse profile functions for the scalar and spin-two chromoelectric energy-momentum-tensor responses selected by compact-charmonium probes of the proton. The scalar branch is the anomaly and sigma amplitude, while the spin-two branch contains the gravitational combination 3B_i(t)−D_i(t)=6J_i(t)−3A_i(t)−D_i(t) rather than A_i(t) alone. In the Drell-Yan frame, these two amplitudes define normalized transverse response profiles whose integrated ratio reproduces the forward light-front spin-two/scalar strength, while the finite transverse-distance behavior is sensitive to the relative scalar and gravitational slopes. The construction gives a spatial representation of the chromoelectric EMT projection without interpreting a measured near-threshold slope as a model-independent static three-dimensional mass radius.
ER -