2Ei(2π)3. (2π)4δ4(∑ j pj)〈 |M|2〉[feq. A (p3)feq. B (p4) − fχ(p1)fχ(p2)],. (A.2) … sub-GeV Dark Matter with Semiconductor Targets, JHEP 05 (2016) 046, … Download