T-odd Effect from Two-Photon Exchange in SIDIS at Low Transverse Momentum
Abstract
We study T-odd effects through two-photon exchange in semi-inclusive deeply inelastic scattering in the kinematic region where the produced hadron has a low transverse momentum. The absorptive part of lepton-quark scattering amplitude is calculated. Transverse momentum dependent factorization is performed with the absorptive part. Although the absorptive part is divergent, the physical results, i.e., the obtained differential cross-section, is finite. Including the T-odd effects, the differential cross section receives new contributions which have different angular dependence than that obtained with one-photon exchange. Certain asymmetries can be introduced to detect the T-odd effects. Our results here are not only relevant to detecting new effect beyond the one-photon approximation in the process but also relevant to searching for new physics at lepton-proton colliders.
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BibTeX
@misc{ma2026todd,
title = {{T-odd Effect from Two-Photon Exchange in SIDIS at Low Transverse Momentum}},
author = {J. P. Ma and G. P. Zhang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.19574},
eprint = {2609.19574},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.19574},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - T-odd Effect from Two-Photon Exchange in SIDIS at Low Transverse Momentum
AU - J. P. Ma
AU - G. P. Zhang
PY - 2026
DA - 2026/09/17
PB - arXiv
DO - 10.48550/arxiv.2609.19574
UR - https://arxiv.org/abs/2609.19574
AB - We study T-odd effects through two-photon exchange in semi-inclusive deeply inelastic scattering in the kinematic region where the produced hadron has a low transverse momentum. The absorptive part of lepton-quark scattering amplitude is calculated. Transverse momentum dependent factorization is performed with the absorptive part. Although the absorptive part is divergent, the physical results, i.e., the obtained differential cross-section, is finite. Including the T-odd effects, the differential cross section receives new contributions which have different angular dependence than that obtained with one-photon exchange. Certain asymmetries can be introduced to detect the T-odd effects. Our results here are not only relevant to detecting new effect beyond the one-photon approximation in the process but also relevant to searching for new physics at lepton-proton colliders.
ER -