Leptophilic-portal dark matter in the light of AMS-02 positron excess

We revisit dark matter annihilation as an explanation of the positron excess reported recently by AMS-02 satellite-borne experiment. To this end, we propose a particle model considering Two Higgs Doublet Model (2HDM) extended with additional singlet boson and fermion. The (light) mixes pseudoscalar inherent in 2HDM, fermion, which is candidate, annihilates via bosonic portal. candidate made leptophilic choosing lepton-specific 2HDM suitable high value $\tan\beta$. identify parameter space explains muon g-2 anomaly while evading experimental constraints. After establishing viability fermion to be calculate produced from its light bosons primarily decay muons. Incorporating Sommerfeld effect caused mediator appropriate boost factor, find that our proposed can satisfactorily explain fraction well spectrum data