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arXiv · 2202.07413

Post-Newtonian Feasibility of the Closed String Massless Sector

Kang-Sin Choi·Jeong-Hyuck Park
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Abstract

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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Kang-Sin Choi, Jeong-Hyuck Park. 2022-02-15. Post-Newtonian Feasibility of the Closed String Massless Sector. https://doi.org/10.1103/physrevlett.129.061603

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