Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Shifts in BCFW method for QED   We study the application of BCFW recursion relations to the QED processes
$0\to e^- e^+ n \gamma$. Based on 6-point amplitudes (both MHVA and NMHVA)
computed from Feynman diagrams in the Berends-Giele gauge, we conduct a
comprehensive study on all different shifts. Then we propose a new shift (LLYZ
shift) which can lead to the full amplitudes for these processes and can have
some realistic computation advantages. We compare the number of terms and the
independent amplitudes of this novel shift with a few typical shifts.

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The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio