Stability and hierarchy problems in string-inspired braneworld scenariosSaurya Das1, Anindya Dey2 and Soumitra SenGupta3
1 Department of Physics, University of Lethbridge - 4401 University Drive, Lethbridge Alberta, T1K 3M4, Canada
2 The University of Texas at Austin, Theory Group - 1 University Station, C1608 Austin, TX 78712-0269, USA
3 Department of Theoretical Physics, Indian Association for the Cultivation of Science - Calcutta, 700032, India
received 3 April 2008; accepted in final form 15 July 2008; published September 2008
published online 1 September 2008
We generalise the RS braneworld model by taking into account a general stringy bulk containing the scalar dilaton field and the two-form Kalb-Ramond field, apart from gravity. Assuming small fluctuations around a RS background, the backreacted warp factor is obtained. It is shown that the fine-tuning problem in connection with the Higgs mass reappears in a new guise and the effective modular potential fails to stabilise the braneworld.
11.25.-w - Strings and branes.
04.60.-m - Quantum gravity.
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