4 papers
Second-Order Fermions
Johnny Espin
It has been proposed several times in the past that one can obtain an equivalent, but in many aspects simpler description of fermions by first reformulating their first-order (Dira…
Second-Order Fermions and the Standard Model
Johnny Espin
We present a construction of a non-hermitian fermionic Lagrangian which has a second-order kinetic term. Despite the non-hermicity of the latter, the theory is unitary and the pert…
Second Order Standard Model
Johnny Espin, Kirill Krasnov
We rewrite the Lagrangian of the fermionic sector of the Standard Model in a novel compact form. The new Lagrangian is second order in derivatives, and is obtained from the usual f…
OPE Convergence in Conformal Field Theory
Duccio Pappadopulo, Slava Rychkov, Johnny Espin +1
We clarify questions related to the convergence of the OPE and conformal block decomposition in unitary Conformal Field Theories (for any number of spacetime dimensions). In partic…