@article{57d0d10a97a549c38a1fb5f0bbcd7538,
title = "Post-Newtonian Feasibility of the Closed String Massless Sector",
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 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.",
author = "Choi, {Kang Sin} and Park, {Jeong Hyuck}",
note = "Funding Information: We wish to thank Robert Brandenberger, Minkyoo Kim, Bum-Hoon Lee, Chang-Hwan Lee, Hocheol Lee, Taekoon Lee, Wonwoo Lee, Shinji Mukohyama, Sang-Jin Sin, and Clifford Will for useful comments and correspondences. This work is supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) Grants No. NRF-2016R1D1A1B01015196, NRF-2018R1A2B2007163, and NRF-2020R1A6A1A03047877 (Center for Quantum Space Time). Publisher Copyright: {\textcopyright} 2022 authors. Published by the American Physical Society.",
year = "2022",
month = aug,
day = "5",
doi = "10.1103/PhysRevLett.129.061603",
language = "English",
volume = "129",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "6",
}