177 citations · 1.1k across the 38 of their papers we have counts for
11 papers · 1 filter
On Amplitudes and Field Redefinitions
Timothy Cohen, Xiaochuan Lu, Dave Sutherland
We derive an off-shell recursion relation for correlators that holds at all loop orders. This allows us to prove how generalized amplitudes transform under generic field redefiniti…
Constraints on the spectrum of field theories with non-integer symmetry from quantum evanescence
Weiguang Cao, Xiaochuan Lu, Tom Melia
We identify constraints in the energy spectra of quantum theories that have a global symmetry, where is treated as a continuous parameter. We point out that a class of e…
Effective Field Theories as Lagrange Spaces
Nathaniel Craig, Yu-Tse Lee, Xiaochuan Lu +1
We present a formulation of scalar effective field theories in terms of the geometry of Lagrange spaces. The horizontal geometry of the Lagrange space generalizes the Riemannian ge…
On-Shell Covariance of Quantum Field Theory Amplitudes
Timothy Cohen, Nathaniel Craig, Xiaochuan Lu +1
Scattering amplitudes in quantum field theory are independent of the field parameterization, which has a natural geometric interpretation as a form of `coordinate invariance.' Ampl…
Outer Automorphism Anomalies
Brian Henning, Xiaochuan Lu, Tom Melia +1
We discuss anomalies associated with outer automorphisms in gauge theories based on classical groups, namely charge conjugations for and parities for . We emphasize…
Convergent Momentum-Space OPE and Bootstrap Equations in Conformal Field Theory
Marc Gillioz, Xiaochuan Lu, Markus A. Luty +1
General principles of quantum field theory imply that there exists an operator product expansion (OPE) for Wightman functions in Minkowski momentum space that converges for arbitra…