TY - JOUR
T1 - Reevaluation of neutron electric dipole moment with QCD sum rules
AU - Hisano, Junji
AU - Lee, Jeong Yong
AU - Nagata, Natsumi
AU - Shimizu, Yasuhiro
PY - 2012/6/26
Y1 - 2012/6/26
N2 - We study the neutron electric dipole moment in the presence of the CP-violating operators up to dimension five in terms of the QCD sum rules. It is found that the operator product expansion calculation is robust when exploiting a particular interpolating field for a neutron, while there exist some uncertainties on the phenomenological side. By using input parameters obtained from the lattice calculation, we derive a conservative limit for the contributions of the CP-violating operators. We also show the detail of the derivation of the sum rules.
AB - We study the neutron electric dipole moment in the presence of the CP-violating operators up to dimension five in terms of the QCD sum rules. It is found that the operator product expansion calculation is robust when exploiting a particular interpolating field for a neutron, while there exist some uncertainties on the phenomenological side. By using input parameters obtained from the lattice calculation, we derive a conservative limit for the contributions of the CP-violating operators. We also show the detail of the derivation of the sum rules.
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U2 - 10.1103/PhysRevD.85.114044
DO - 10.1103/PhysRevD.85.114044
M3 - Article
AN - SCOPUS:84863222900
SN - 1550-7998
VL - 85
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 11
M1 - 114044
ER -