Primordial black holes in SB SUSY Gauss-Bonnet inflation

Here, we explore the formation of primordial black holes (PBHs) within a scalar field inflationary model coupled to the Gauss-Bonnet (GB) term, incorporating low-scale spontaneously broken supersymmetric (SB SUSY) potential. The coupling function amplifies the curvature perturbations, consequently leading to the formation of PBHs and the production of detectable secondary gravitational waves (GWs). Through the adjustment of model parameters, the inflaton can be decelerated during the ultra-slow-roll (USR) phase, thereby augmenting curvature perturbations. Swampland criteria are also investigated. Our computations forecast the formation of PBHs with masses on the order of O (10) M_, aligning with observational data from LIGO-Virgo and PBHs with masses O (10^-6) M_, offering potential explanation for ultrashort-timescale microlensing events recorded in OGLE data. Additionally, our proposed mechanism can generate PBHs with masses around O (10^-13) M_, constituting roughly 99\% of the dark matter. The density parameter of produced GWs (₆ₖ䃐) intersects with the sensitivity curves of GW detectors. Two cases of our model fall within the nano-Hz regime. One of these satisfies the ₆ₖ (f) f^5- fit, with the derived = 3. 51 matching the NANOGrav 15-year data.