We study the classical geometry produced by a stack of stable (i.e., tachyon-free) non-BPS D-branes present in K3 compactifications of type IT string theory. This classical representation is derived by solving the equations of motion describing the low-energy dynamics of the supergravity fields which couple to the non-BPS state. Differently from what expected, this configuration displays a singular behaviour: the space-time geometry has a repulson-like singularity This fact suggests that the simplest setting, namely a set of coinciding non-interacting D-branes, is not acceptable. We finally discuss the possible existence of other acceptable configurations corresponding to more complicated bound states of these non-BPS branes.
|Titolo:||Is a classical description of stable nonBPS D-branes possible?|
|Autori:||BERTOLINI M; P. DI VECCHIA; M. FRAU; A. LERDA; R. MAROTTA; R. RUSSO|
|Data di pubblicazione:||2000|
|Digital Object Identifier (DOI):||10.1016/S0550-3213(00)00558-7|
|Appare nelle tipologie:||1.1 Journal article|