Physical projectors for multi-leg helicity amplitudes
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep07(2019)114
Abstract: Abstract We present a method for building physical projector operators for multi-leg helicity amplitudes. For any helicity configuration of the external particles, we define a physical projector which singles out the corresponding helicity amplitude. For… read more here.
Keywords: leg helicity; physical projectors; multi leg; helicity ... See more keywords
Two-loop leading-colour QCD helicity amplitudes for Higgs boson production in association with a bottom-quark pair at the LHC
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep11(2021)012
Abstract: Abstract We compute the two-loop QCD helicity amplitudes for the production of a Higgs boson in association with a bottom quark pair at a hadron collider. We take the approximations of leading colour and work… read more here.
Keywords: qcd helicity; association bottom; bottom; two loop ... See more keywords
Reduced nuclear helicity amplitudes for deuteron electrodisintegration and other processes
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review C"
DOI: 10.1103/physrevc.107.045205
Abstract: We extend the original idea of reduced nuclear amplitudes to capture individual helicity amplitudes and discuss various applications to exclusive processes involving the deuteron. Specifically, we consider deuteron form factors, structure functions, tensor polarization observables,… read more here.
Keywords: form factors; helicity amplitudes; reduced nuclear; electrodisintegration ... See more keywords
Transition form factors and helicity amplitudes for electroexcitation of negative and positive parity nucleon resonances in a light-front quark model
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.094013
Abstract: A workable basis of quark configurations $s^3$, $s^2p$ and $sp^2$ at light front has been constructed to describe the high-$Q^2$ behavior of transition form factors and helicity amplitudes in the electroproduction of the lightest nucleon… read more here.
Keywords: transition form; form factors; factors helicity; light front ... See more keywords