Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stellar cooling bounds on new light particles: plasma mixing effects   Strong constraints on the coupling of new light particles to the Standard
Model (SM) arise from their production in the hot cores of stars, and the
effects of this on stellar cooling. For new light particles which have an
effective in-medium mixing with the photon, plasma effects can result in
parametrically different production rates to those obtained from a naive
calculation. Taking these previously-neglected contributions into account, we
make updated estimates for the stellar cooling bounds on light scalars and
vectors with a variety of SM couplings. In particular, we improve the bounds on
light (m <~ keV) scalars coupling to electrons or nucleons by up to 3 orders of
magnitude in the coupling squared, significantly revise the supernova cooling
bounds on dark photon couplings, and qualitatively change the mass dependence
of stellar bounds on new vectors. Scalars with mass <~ 2 keV that couple
through the Higgs portal are constrained to mixing angle <~ 3*10^-10, which
gives the dominant bound for scalar masses above ~ 0.2 eV.

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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
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The categories of this paper are: cs
27
The categories of this paper are: comp-gas
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg