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hep-ph2025
Constructive Heavy Particle Effective Theory with Nonlinear Poincaré Symmetry
Yong-Kang Li, Yi-Ning Wang, Jiang-Hao Yu
We develop a constructive heavy particle effective theory (HPET) through the nonlinear realization of the spontaneously broken Poincaré symmetry $R^{3,1} \rtimes SO(3,1) \rightarro…
hep-ph2025
Massive Helicity-Chirality Spinor Formalism from Massless Amplitudes with On-shell Mass Insertion
Yu-Han Ni, Yi-Ning Wang, Chao Wu +1
We introduce a helicity-chirality spinor formalism to describe scattering amplitudes for particles of any masses and spins. The massive spin-spinors introduced by Arkani-hamed-Huan…