Volume 83, Number 5, September 2008
Article Number 51002
Number of page(s) 4
Section The Physics of Elementary Particles and Fields
Published online 01 September 2008
EPL, 83 (2008) 51002
DOI: 10.1209/0295-5075/83/51002

Stability and hierarchy problems in string-inspired braneworld scenarios

Saurya 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.

© EPLA 2008