Cosmic-ray antiproton excess from annihilating tensor dark matter

In this work we show that the excess of antiprotons in the range $E_{K}=10-20 ~GeV$ reported by several groups in the analysis of the AMS-02 Collaboration data, can be explained by the production of antiprotons in the annihilation of dark matter with a $(1,0)\oplus (0,1)$ space-time structure (tensor dark matter). First, we calculate the proton and antiproton flux from conventional mechanisms and fit our results to the AMS-02 data, confirming the antiproton excess. Then we calculate the antiproton production in the annihilation of tensor dark matter. For the window $M\in [62.470,62.505] ~ GeV$ to which the measured relic density, XENO1T results and the gamma ray excess from the galactic center constrain the values of the tensor dark matter mass, we find sizable contributions of antiprotons in the excess region from the annihilation into $\bar{b}b$ and smaller contributions from the $\bar{c}c$ channel. We fit our results to the AMS-02 data, finding an improvement of the fit for these values of $M$.