Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-11-12
Phys.Rev.Lett. 82 (1999) 4578-4581
Physics
High Energy Physics
High Energy Physics - Phenomenology
Some typos and statements are corrected; to appear in Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.82.4578
Cosmological evolution of axionic strings is investigated by numerically solving field equations of a complex scalar field in 3+1 dimensions. It is shown that the global strings relax to the scaling solution with a significantly smaller number density than the case of local strings. The power spectrum of axions radiated from them is calculated from the simulation data, which is found to be highly peaked around the Hubble scale, and a more accurate constraint on the Peccei-Quinn breaking scale is obtained.
Kawasaki Masahiro
Yamaguchi Masahide
Yokoyama Jun'ichi
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