2 1/dt)R Gravity and Scalar-Tensor Gravity Takeshi Chiba,
Physics Letters B, 575, 1-3 (2003). Carroll-Duvvuri-Trodden-Turner s influential paper appeared on arxiv June, 2003: R-M4/dt)R
: R, etc Strings 2003 (Kyoto) coffee break
(R ) =0! 3
Carroll (Cline, Kaloper, Flanagan, Kamionkowski )
Mark Kamionkowski (Tristan Smith and Adrienne Erickcek): f(R) Hello Dr. Chiba, We would like to call your attention to our preprint astroph/dt)0610483 where we address issues related to calculating the Solar System spacetime in F(R) = R-\mu4/dt)R gravity theory. We thought, given your work in astro-ph/dt)0307338,
you would find this article interesting. You might be aware of a recent controversy surrounding the use of scalar/dt)tensor theories to study F(R) modifications to GR. In particular, there are several articles which cast doubt on the statement that \gamma = 1/dt)2 for F(R) = R-\mu4/dt)R gravity theory. We thought you might be interested in a calculation that reproduces your result of \gamma = 1/dt)2 without appealing to scalar/dt)tensor theory. We would appreciate any comments that you might have.
Thank you very much. Sincerely, Tristan Smith and Adrienne Erickcek 3 e-mail
Thanksgiving Day 3 JGRG arXiv PPN
Brans-Dicke PPN parameter (primordial/dt)secondary) nonGaussianity : (Chiba-Takahashi, Chiba-Nakamura,07): compare H(z) or m
Tycho Brahe : 2 f m/dt)r2 f(r)
f=GMm/dt)r2 It is just the research field very few people (in Japan) did at that time: I might be able to be the first person! Nowadays, everyone talks about dark
energy Takashi Nakamura, Naoshi Sugiyama, Masahide Yamaguchi, Takahiro Okabe, Ryuichi Takahashi, Ryo Nagata, Tristan L. Smith, Adrienne L. Erickcek., Sourish Dutta, Robert J. Scherrer, and others for fruitful collaboration!
JSPS, Kyoto University and Nihon University for financial support
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