The origin of sub-TeV gamma rays detected by Fermi-LAT from the Fermi bubbles at the\nGalactic center is still unknown. In a hadronic model, acceleration of protons and/or nuclei and\ntheir subsequent interactions with gas in the bubble volume can produce observed gamma rays.\nSuch interactions naturally produce high-energy neutrinos, and a detection of those can discriminate\nbetween a hadronic and a leptonic origin of gamma rays. Additional constraints on the Fermi bubbles\ngamma-ray flux in the TeV range from recent HAWC observations restrict hadronic model parameters,\nwhich in turn disfavor Fermi bubbles as the origin of a large fraction of neutrino events detected by\nIceCube along the bubble directions. We revisit our hadronic model and discuss future constraints on\nparameters from observations in very high-energy gamma rays and neutrinos.
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