Post-Newtonian Feasibility of the Closed String Massless Sector

Kang Sin Choi, Jeong Hyuck Park

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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 βPPN, γPPN with the charges of electric H flux and dilaton respectively, and further relate them to stress-energy tensor. We show βPPN=1 from weak energy condition and argue that the observation of γPPN≃1 signifies the ultrarelativistic equation of state in baryons, or the suppression of gluon condensate.

Original languageEnglish
Article number061603
JournalPhysical Review Letters
Issue number6
StatePublished - 5 Aug 2022

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© 2022 authors. Published by the American Physical Society.


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