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- W3106450683 abstract "For the first time, a full one-loop calculation of the process $chichito 2gamma$ is performed, where $chi$ is the lightest neutralino in the minimal supersymmetric extension of the Standard Model. This process is of interest for dark matter detection, since it would give a sharp $gamma$ ray line with $E_gamma=m_chi$. We improve upon and correct published formulas, and give cross sections for supersymmetric models with $chi$ masses between 30 GeV and several TeV. We find a new contribution, previously neglected, which enhances the $2gamma$ rate for TeV higgsinos by up to an order of magnitude. As a byproduct, we obtain a new expression for the related process $chichito 2 gluons$, which on the other hand is generally smaller than previously calculated. There has been a recent claim that evidence for a 3.5 TeV higgsino annihilating into a $gamma$ line may already exist from balloon emulsion and Air Cherenkov Telescope data. We comment on attractive features and problems with this interpretation." @default.
- W3106450683 created "2020-11-23" @default.
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- W3106450683 date "1997-10-01" @default.
- W3106450683 modified "2023-09-26" @default.
- W3106450683 title "Full one-loop calculation of neutralino annihilation into two photons" @default.
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- W3106450683 doi "https://doi.org/10.1016/s0550-3213(97)00530-0" @default.
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