Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wilson lines, Grassmannians and Gauge Invariant Off-shell Amplitudes in
  N=4 SYM   In this paper we consider tree-level gauge invariant off-shell amplitudes
(Wilson line form factors) in $\mathcal{N}=4$ SYM. For the off-shell amplitudes
with one leg off-shell we present a conjecture for their Grassmannian integral
representation in spinor helicity, twistor and momentum twistor
parameterizations. The presented conjecture is successfully checked against
BCFW results for MHV$_n$, NMHV$_4$ and NMHV$_5$ off-shell amplitudes. We have
also verified that our Grassmannian integral representation correctly
reproduces soft (on-shell) limit for the off-shell gluon momentum. It is shown
that the (deformed) off-shell amplitude expressions could be also obtained
using quantum inverse scattering method for auxiliary $gl(4|4)$ super spin
chain.

23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc