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arXiv · 2602.13044

Rotating synchrotron radiation: Photon emission from magnetized and rotating quark-gluon plasma

Matteo Buzzegoli·Sergiu Busuioc·Jonathan D. Kroth·Nandagopal Vijayakumar·Kirill Tuchin
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Abstract

This paper investigates the production of non-prompt photons originating from rotating synchrotron radiation (RoSyRa), specifically the emission of photons by a rigidly rotating quark-gluon plasma in thermal equilibrium, in the presence of an external magnetic field. We compute the non-prompt photon spectrum and its elliptic flow ($v_2$) at mid-rapidity. In particular, we investigate the finite volume effects. We find that at low transverse momentum, the magnetic field induces a significant $v_2$, while the plasma rotation boosts the synchrotron radiation of negatively charged quarks. These findings make RoSyRa a viable candidate mechanism to resolve the "direct photon puzzle."

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Matteo Buzzegoli, Sergiu Busuioc, Jonathan D. Kroth, Nandagopal Vijayakumar, Kirill Tuchin. 2026-02-13. Rotating synchrotron radiation: Photon emission from magnetized and rotating quark-gluon plasma. https://doi.org/10.1103/5d5w-9338

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