Volume 83, Number 5, September 2008
|Number of page(s)||4|
|Section||The Physics of Elementary Particles and Fields|
|Published online||01 September 2008|
Stability and hierarchy problems in string-inspired braneworld scenarios
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
Accepted: 15 July 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.
PACS: 11.25.-w – Strings and branes / 04.60.-m – Quantum gravity
© EPLA, 2008
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