Electroweak box diagram contribution for pion and kaon decay from lattice QCD

Jun-Sik Yoo, Tanmoy Bhattacharya, Rajan Gupta +2

One of the sensitive probes of physics beyond the standard model is the test of the unitarity of the Cabbibo-Kobyashi-Maskawa (CKM) matrix. Current analysis of the first row is bas…