Gravitational redshift in Einstein-Kalb-Ramond spacetime and Randall-Sundrum scenarioS. SenGupta1 and S. Sur2
1 Department of Theoretical Physics, Indian Association for the Cultivation of Science Jadavpur, Kolkata 700 032, India
2 Department of Physics, Jadavpur University - Kolkata 700 032, India
(Received 17 October 2003; accepted 16 December 2003)
It is shown that the gravitational redshift as predicted by Einstein's theory is modified in the presence of a second-rank antisymmetric tensor (Kalb-Ramond) field in a string-inspired background spacetime. In the presence of extra dimensions, the Randall-Sundrum brane world scenario is found to play a crucial role in suppressing this additional shift. The bound on the value of the warp factor is determined from the redshift data and is found to be in excellent agreement with that determined from the requirements of the standard model.
04.50.+h - Gravity in more than four dimensions, Kaluza-Klein theory, unified field theories; alternative theories of gravity.
98.80.-k - Cosmology.
11.25.Wx - String and brane phenomenology.
© EDP Sciences 2004