Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-05-29
Physics
High Energy Physics
High Energy Physics - Theory
12 pages, no figure. v2: interpretation of the solution included
Scientific paper
It is shown that the tachyons which originate from unstable D-branes carry energy and momentum at the velocity $\beta = c^2/v,$ where $v$ is the phase velocity which is greater than $c.$ For an observer who moves with the velocity $\beta,$ tachyon is observed to be moving from one of the ground states of the tachyon potential to the potential hill. It is found that tachyon either passes over the hill or bounces back to the original ground state. Another possible solution is the case which is margial to these, that is tachyon reaches to the top of the potential hill and stays there forever.
Chung Jin Hyun
l'Yi Won Sik
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