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hep-ph2026
Flash from the Past: New Gamma-Ray Constraints on Light CP-even Scalar from SN1987A
Yue Yu, Writasree Maitra, P. S. Bhupal Dev +4
We derive new constraints on light CP-even scalars using old gamma-ray observations in the direction of SN1987A by the Solar Maximum Mission (SMM) satellite. Light scalars can be a…
hep-ph2023
New Constraints on Axion-Like Particles from IXPE Polarization Data for Magnetars
Ephraim Gau, Fazlollah Hajkarim, Steven P. Harris +4
We derive new constraints on axion-like particles (ALPs) using precision -ray polarization studies of magnetars. Specifically, we use the first detection of polarized -rays f…