Millicharged Particles at the Short Baseline Near Detector at Fermilab

Millicharged particles (mCPs) are hypothetical particles that carry a fraction of the electron's charge and may be linked to dark matter. The Short-Baseline Near Detector (SBND) at Fermilab, utilizing a Liquid Argon Time Projection Chamber (LArTPC), offers a promising platform for detecting mCPs, as demonstrated by previous experiments such as ArgoNeuT. With an active mass of 112 ton, SBND is currently taking data and will continue until the Fermilab long shutdown in 2028. In this talk, I will outline various search strategies for mCPs produced both in the Booster Neutrino Beam and in cosmic-ray air showers, and explore the parameter space accessible to SBND.