5 papers
Recursion Relation for BCFW Boundary Terms of NLSM Amplitudes
Kang Zhou
When computing tree-level amplitudes of the nonlinear sigma model (NLSM) via the BCFW on-shell recursion relation, boundary terms are inevitable. Here, the BCFW recursion relation…
A new recursion relation for tree-level NLSM amplitudes based on hidden zeros
Xiaodi Li, Kang Zhou
In this note, we propose a novel BCFW-like recursion relation for tree-level non-linear sigma model (NLSM) amplitudes, which circumvents the computation of boundary terms by exploi…
Hidden Zeros and -split via BCFW Recursion Relation
Bo Feng, Liang Zhang, Kang Zhou
In this paper, we provide another angle to understand recent discoveries, i.e., the hidden zeros and corresponding 2-split behavior using the BCFW recursion relation. For the hidde…
Note on hidden zeros and expansions of tree-level amplitudes
Hao Huang, Ye Yang, Kang Zhou
In this note, we derive and interpret hidden zeros of tree-level amplitudes of various theories, including Yang-Mills, non-linear sigma model, special Galileon, Dirac-Born-Infeld,…
Understanding zeros and splittings of ordered tree amplitudes via Feynman diagrams
Kang Zhou
In this paper, we propose new understandings for recently discovered hidden zeros and novel splittings, by utilizing Feynman diagrams. The study focus on ordered tree level amplitu…