Transverse Fierz–Pauli symmetry

Transverse Fierz - Pauli symmetry

We consider some flat space theories for spin 2 gravitons, with less invariance than full diffeomorphisms. For the massless case, classical stability and absence of ghosts require invariance under transverse diffeomorphisms (TDiff), hμν 7→ hμν + 2∂(νξμ), with ∂μξ μ = 0. Generic TDiff invariant theories contain a propagating scalar, which disappears if the symmetry is enhanced in one of two ways...

Transverse Symmetry and Spin-3/2 Fields

We study the possible covariant Lagrangians that describe the propagation of pure spin3/2 particles. We show that, apart from the well-known Rarita-Schwinger Lagrangian, there is another possibility where the field is described by a γ-traceless combination and that both Lagrangians yield the same physical predictions for the interaction of conserved sources. We also prove that for the case when...

Assessment of transverse abdominal muscle symmetry by ultrasonography.

BACKGROUND One of the methods of assessing the transverse abdominal muscle is ultrasonography, which visualizes its thickness and location. We set out to answer the question if the transverse abdominal muscle can always be treated as located symmetrically among the trunk structures. MATERIAL AND METHODS A group of 113 volunteers took part in the study. The volunteers did not experience any se...

Hyperfine meson splittings: chiral symmetry versus transverse gluon exchange

Meson spin splittings are examined within an effective Coulomb gauge QCD Hamiltonian incorporating chiral symmetry and a transverse hyperfine interaction necessary for heavy quarks. For light and heavy quarkonium systems the pseudoscalar-vector meson spectrum is generated by approximate Bardeen-CooperSchrieffer, random-phase approximation diagonalizations. This relativistic formulation includes...

Symmetry of Fullerene C_60