Why leptoquarks ?
There are 6 quarks and 6 leptons. Quarks and leptons are both arranged into 3 generations. A W boson can transform a charged lepton into a neutral lepton. A W boson can also transform an up-type quark to a down-type quark. That's a lot of coincidences. Perhaps quarks and leptons are more fundamentally related ? Perhaps there are particles that behave both like leptons and quarks ?
Anomalies in the decay of B hadrons could be solved if there are strong new interactions with leptoquarks composed of third-generation particles. My group have recently started looked for these particles.
More to come !!