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On scalar radiation Fiol Núñez, Bartomeu Martínez Montoya, Jairo Teoria de camps (Física) Radiació Field theory (Physics) Radiation We discuss radiation in theories with scalar fields. Our key observation is that even in flat spacetime, the radiative fields depend qualitatively on the coupling of the scalar field to the Ricci scalar: for non-minimally coupled scalars, the radiative energy density is not positive definite, the radiated power is not Lorentz invariant and it depends on the derivative of the acceleration. We explore implications of this observation for radiation in conformal field theories. First, we find a relation between two coefficients that characterize radiation, that holds in all the conformal field theories we consider. Furthermore, we find evidence that for a 1/2-BPS probe coupled to N = 4 super Yang-Mills, and following an arbitrary trajectory, the spacetime dependence of the one-point function of the energy momentum tensor is independent of the Yang-Mills coupling. 2021-07-06T16:43:29Z 2021-07-06T16:43:29Z 2020-03-13 2021-07-06T16:43:30Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1007/JHEP03(2020)087 Journal of High Energy Physics, 2020, vol. 2020, num. 87 https://doi.org/10.1007/JHEP03(2020)087 info:eu-repo/grantAgreement/EC/H2020/713673/EU//INPhINIT cc-by (c) Fiol Núñez, Bartomeu et al., 2020 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Springer Verlag Articles publicats en revistes (Física Quàntica i Astrofísica)