TY - JOUR
T1 - Relativistic dynamics of multi-BPS D-vortices and straight BPS D-strings
AU - Cho, Inyong
AU - Kim, Taekyung
AU - Kim, Yoonbai
AU - Ryu, Kyungha
PY - 2008/9/11
Y1 - 2008/9/11
N2 - Moduli space dynamics of multi-D-vortices from D 2 over(D, ̄) 2 (equivalently, parallel straight D-strings from D 3 over(D, ̄) 3) is systematically studied. For the BPS D-vortices, we show through exact calculations that the classical motion of randomly-distributed n D-vortices is governed by a relativistic Lagrangian of free massive point-particles. When the head-on collision of two identical BPS D-vortices of zero radius is considered, it predicts either 90° scattering or 0° scattering equivalent to 180° scattering. Since the former leads to a reconnection of two identical D-strings and the latter does to a case of their passing through each other, two possibilities are consistent with the prediction of string theory. It is also shown that the force between two non-BPS vortices is repulsive. Although the obtained moduli space dynamics of multi-BPS-D-vortices is exact in classical regime, the quantum effect of an F-string pair production should be included in determining the probabilities of the reconnection and the passing through for fast-moving cosmic superstrings.
AB - Moduli space dynamics of multi-D-vortices from D 2 over(D, ̄) 2 (equivalently, parallel straight D-strings from D 3 over(D, ̄) 3) is systematically studied. For the BPS D-vortices, we show through exact calculations that the classical motion of randomly-distributed n D-vortices is governed by a relativistic Lagrangian of free massive point-particles. When the head-on collision of two identical BPS D-vortices of zero radius is considered, it predicts either 90° scattering or 0° scattering equivalent to 180° scattering. Since the former leads to a reconnection of two identical D-strings and the latter does to a case of their passing through each other, two possibilities are consistent with the prediction of string theory. It is also shown that the force between two non-BPS vortices is repulsive. Although the obtained moduli space dynamics of multi-BPS-D-vortices is exact in classical regime, the quantum effect of an F-string pair production should be included in determining the probabilities of the reconnection and the passing through for fast-moving cosmic superstrings.
UR - http://www.scopus.com/inward/record.url?scp=51749118961&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2008.08.006
DO - 10.1016/j.physletb.2008.08.006
M3 - Article
AN - SCOPUS:51749118961
SN - 0370-2693
VL - 666
SP - 502
EP - 510
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 5
ER -