Spin Formalism and Applications to New Physics Searches

Abstract

An introduction to spin techniques in particle physics is given. Among the topics covered are: helicity formalism and its applications to the decay and scattering of spin-1/2 and spin-1 particles, techniques for evaluating helicity amplitudes (including projection operator methods and the spinor helicity method), and density matrix techniques. The utility of polarization and spin correlations for untangling new physics beyond the Standard Model at future colliders such as the LHC and a high energy $e^{+}{e}^{-}$ linear collider is then considered. A number of detailed examples are explored including the search for low-energy supersymmetry, a non-minimal Higgs boson sector, and new gauge bosons beyond the $W^{\pm }$ and $Z$.

83 pages, PHYZZX format (figures missing). Complete version of paper (84 pages of uuencoded postscript with figures) is available from the author

Cited by in corpus (23)

• Two-component spinor techniques and Feynman rules for quantum field theory and supersymmetry
• Review of Lepton Universality tests in B decays
• Generalised helicity formalism, higher moments and the $B\to K_{J_K}(\to K\pi ){\bar{\ell }}_1{\ell }_2$ angular distributions
• Probing Secret Interactions of Astrophysical Neutrinos in the High-Statistics Era
• A T-odd asymmetry in neutralino production and decay
• Unitarity Bounds on Dark Matter Effective Interactions at LHC
• Angular analysis of the rare decay ${\Lambda }_b\to \Lambda (1520)(\to NK){\ell }^{+}{\ell }^{-}$
• Probing SUSY CP Violation in Two-Body Stop Decays at the LHC
• Study of $X(6900)$ with unitarized coupled channel scattering amplitudes
• A Covariant Method for Calculating Helicity Amplitudes
• Simulation of Beyond Standard Model Physics in Herwig++
• Probing CP Violation with and without Momentum Reconstruction at the LHC
• The ${\Lambda }_b\to {\Lambda }^{\ast }(1520)(\to N\bar{K}){\ell }^{+}{\ell }^{-}$ decay at low-recoil in HQET
• CP asymmetries with Longitudinal and Transverse Beam Polarizations in Neutralino Production and Decay into the Z^0 Boson at the ILC
• New angles on top quark decay to a charged Higgs
• A survey of top quark polarization at a polarized linear e^+ e^- collider
• Inferring the covariant $\Theta$-exact noncommutative coupling in the top quark pair production at linear colliders
• New Physics in $b\to s\ell \ell$ anomalies and its implications for the complementary neutral current decays
• New physics in the angular distribution of $B_c^{-}\to J/\psi (\to {\mu }^{+}{\mu }^{-}){\tau }^{-}(\to {\pi }^{-}{\nu }_{\tau }){\bar{\nu }}_{\tau }$ decay
• Polarized ${\Lambda }_b$ baryon decay to $p\pi$ and a dilepton pair
• Effects of Anomalous Couplings on Spin Determination in Cascade Decays
• The Radial Action from Probe Amplitudes to All Orders
• Symbolic calculation of multiparticle Feynman amplitudes