Polarization signatures of mixed scalar - pseudoscalar ALP - photon couplings in intense laser pulses
Abstract
We investigate photon-to-axion-like-particle (ALP) conversion in a finite, linearly polarized laser pulse for a single ALP field with simultaneous scalar-type and pseudoscalar-type couplings to photons. Varying the collision angle between the strong pulse and the probe provides a continuous kinematic scan of the resonant ALP mass. For fixed kinematics in this setting, the scalar-type and pseudoscalar-type ALP conversion amplitudes interfere coherently, making both the photon-to-ALP conversion probability and the polarization rotation depend on the difference between the probe polarization angle α and the coupling angle θg. Conversion is maximal at |α−θg|=90∘, where the polarization rotation vanishes, while the rotation magnitude peaks at α−θg=45∘ modulo 90∘, where conversion is half-maximal. These complementary polarization-angle dependences provide polarization-resolved signatures of mixed scalar--pseudoscalar photon couplings.
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BibTeX
@misc{kadir2026polarization,
title = {{Polarization signatures of mixed scalar - pseudoscalar ALP - photon couplings in intense laser pulses}},
author = {Musajan Kadir and Hong-Hao Fan and Ying Wu and Qi-Rong Wang and Bai-Song Xie},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.28144},
eprint = {2610.28144},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.28144},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Polarization signatures of mixed scalar - pseudoscalar ALP - photon couplings in intense laser pulses
AU - Musajan Kadir
AU - Hong-Hao Fan
AU - Ying Wu
AU - Qi-Rong Wang
AU - Bai-Song Xie
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2610.28144
UR - https://arxiv.org/abs/2610.28144
AB - We investigate photon-to-axion-like-particle (ALP) conversion in a finite, linearly polarized laser pulse for a single ALP field with simultaneous scalar-type and pseudoscalar-type couplings to photons. Varying the collision angle between the strong pulse and the probe provides a continuous kinematic scan of the resonant ALP mass. For fixed kinematics in this setting, the scalar-type and pseudoscalar-type ALP conversion amplitudes interfere coherently, making both the photon-to-ALP conversion probability and the polarization rotation depend on the difference between the probe polarization angle α and the coupling angle θ_g. Conversion is maximal at |α−θ_g|=90^∘, where the polarization rotation vanishes, while the rotation magnitude peaks at α−θ_g=45^∘ modulo 90^∘, where conversion is half-maximal. These complementary polarization-angle dependences provide polarization-resolved signatures of mixed scalar--pseudoscalar photon couplings.
ER -