Abstract
Supernovae (SNe) are copious sources for Kaluza-Klein (KK) gravitons which are generic for theories with large extra dimensions. These massive particles are produced with average velocities so that many of them are gravitationally retained by the SN core. Every neutron star thus has a halo of KK gravitons which decay into , , and on time scales years. The EGRET -flux limits ( ) for nearby neutron stars constrain the compactification scale for extra dimensions to , and for . The requirement that neutron stars are not excessively heated by KK decays implies for , and for .
- Received 9 October 2001
DOI:https://doi.org/10.1103/PhysRevLett.88.071301
©2002 American Physical Society