9 papers
Massive On-shell Splitting Functions in Spinor-Helicity Formalism
Yi-Ning Wang, Chao Wu, Jiang-Hao Yu
Collinear splitting functions govern parton evolution, parton showers, and resummation at high-energy colliders. While on-shell spinor-helicity methods have successfully yielded ma…
Covariant Spinor Formalism for Multipole Expanded Form Factor
Hong Huang, Tuo Tan, Yi-Ning Wang +1
We present a systematic technique for constructing Lorentz covariant orbital-spin () bases for matrix elements of local operators and the associated form factors, thereby exten…
Covariant canonical-spinor amplitudes for partial wave analysis
Hong Huang, Yi-Ning Wang, Jiang-Hao Yu
We propose a covariant orbital-spin () decomposed amplitude for the partial wave analysis using the massive spinor-helicity formalism. First we review the traditional- meth…
Systematic Operator Construction for Non-relativistic Effective Field Theories: Hilbert Series versus Young Tensor
Yong-Kang Li, Yi-Ning Wang, Jiang-Hao Yu
This work establishes a systematic framework for operator construction in the non-relativistic effective field theory, incorporating both the three dimensional Euclidean symmetry a…
Massless-Massive Amplitude Correspondence II: Constructive Massive Amplitudes in Standard Model
Yu-Han Ni, Chao Wu, Jiang-Hao Yu
In the minimal helicity-chirality formalism, we systematically construct higher-point massive amplitudes from the fundamental building blocks: the contact three-point and four-poin…
Massless-Massive Amplitude Correspondence I: Helicity-chirality Matching and On-shell Higgsing
Yu-Han Ni, Chao Wu, Jiang-Hao Yu
In this work, the massless-massive correspondence for the on-shell scattering amplitudes is constructed so the massive amplitudes could inherit advantageous techniques developed in…
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…
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…
Extended Poincare Symmetry Dictates Massive Scattering Amplitudes
Yu-Han Ni, Yi-Ning Wang, Chao Wu +1
We identify an extended Poincare symmetry for on-shell massive scattering amplitudes, transforming under the Little group symmetry. Thus the one-par…