A generalised-geometric formulation presents ten-dimensional N=1 supergravity with only five quartic fermion terms in the action and supersymmetry transformations.
Post-Newtonian Feasibility of the Closed String Massless Sector
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We perform post Newtonian analysis of Double Field Theory as a test of string theory in gravitational sector against observations. We identify the Eddington--Robertson--Schiff parameters $\beta_{{{\rm{PPN}}}}$, $\gamma_{{{\rm{PPN}}}}$ with the charges of electric $H$-flux and dilaton respectively, and further relate them to stress-energy tensor. We show ${\beta_{{{\rm{PPN}}}}=1}$ from weak energy condition and argue that the observation of $\gamma_{{{\rm{PPN}}}}\simeq 1$ signifies the ultrarelativistic equation of state in baryons, or the suppression of gluon condensate.
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Higher fermions in supergravity
A generalised-geometric formulation presents ten-dimensional N=1 supergravity with only five quartic fermion terms in the action and supersymmetry transformations.