TY - JOUR
T1 - Fate of Z2 symmetric scalar field
AU - Mukaida, Kyohei
AU - Nakayama, Kazunori
AU - Takimoto, Masahiro
PY - 2013/12
Y1 - 2013/12
N2 - The evolution of a coherently oscillating scalar field with Z2 symmetry is studied in detail. We calculate the dissipation rate of the scalar field based on the closed time path formalism. Consequently, it is shown that the energy density of the coherent oscillation can be efficiently dissipated if the coupling constant is larger than the critical value, even though the scalar particle is stable due to the Z2 symmetry.
AB - The evolution of a coherently oscillating scalar field with Z2 symmetry is studied in detail. We calculate the dissipation rate of the scalar field based on the closed time path formalism. Consequently, it is shown that the energy density of the coherent oscillation can be efficiently dissipated if the coupling constant is larger than the critical value, even though the scalar particle is stable due to the Z2 symmetry.
KW - Cosmology of Theories beyond the SM
KW - Thermal Field Theory
UR - http://www.scopus.com/inward/record.url?scp=84890418709&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84890418709&partnerID=8YFLogxK
U2 - 10.1007/JHEP12(2013)053
DO - 10.1007/JHEP12(2013)053
M3 - Article
AN - SCOPUS:84890418709
SN - 1126-6708
VL - 2013
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 12
M1 - 53
ER -