NLSM ⊂ Tr(ϕ^3)
arxiv(2024)
摘要
Scattering amplitudes for the simplest theory of colored scalar particles -
the Tr(ϕ^3) theory - have recently been the subject of active
investigations. In this letter we describe an unanticipated wider implication
of this work: the Tr(ϕ^3) theory secretly contains Non-linear Sigma Model
(NLSM) amplitudes to all loop orders. At tree level, the NLSM amplitudes are
obtained from Tr(ϕ^3) amplitudes by a unique shift of kinematic variables,
guaranteeing the correct pole structure, factorization, and the Adler zero.
Remarkably, essentially the same shifts for tree and loop kinematic variables
of the planar Tr(ϕ^3) integrand produce the planar loop integrand of the
NLSM with correct poles and residues, exhibiting the Adler zero for the
integrated amplitudes. Similar kinematic shifts produce certain infinite
classes of mixed amplitudes of pions and Tr(ϕ^3) scalars.
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