Abstract
We investigate cosmological constraints on phenomenological models with discrete gauge symmetries by discussing the radiation of standard model particles from Aharonov-Bohm strings. Using intersecting D-brane models in Type IIA string theory, we demonstrate that Aharonov-Bohm radiation, when combined with cosmological observations, imposes constraints on the compactification scales.
Highlights
JHEP01(2014)049 around the string, the AB particle picks up a non-trivial holonomy
We investigate cosmological constraints on phenomenological models with discrete gauge symmetries by discussing the radiation of standard model particles from Aharonov-Bohm strings
We studied radiation of the standard model particles from Aharonov-Bohm strings associated with discrete gauge symmetries
Summary
We introduce a simple example of D-brane models with Zk discrete gauge symmetry, and study the energy scales of AB strings and AB particles. AB particle is an object which electrically couples to the gauge field on the D6-brane It is represented as a line operator by using a closed world-line (or infinite length of world-line) Σ1, OAB particle ∼ exp i A. Where Σ2 is a closed surface (or infinitely large world-sheet) In string theory, such an object couples electrically to C5, and is interpreted as a D4-brane wrapping on the cycle α. An interesting feature of the intersecting D-brane models is the hierarchy between the energy scale of string tension and the mass scale of the AB particle Because of this fact, Aharonov-Bohm radiation, which we will show below, occurs at a drastic rate, and a large number of the standard model particles are emitted from the AB string. We will calculate the emission rate of AB particles with this interaction, basically following the paper [37, 38]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
