TY - JOUR
T1 - The sign of the dipole–dipole potential by axion exchange
AU - Daido, Ryuji
AU - Takahashi, Fuminobu
N1 - Funding Information:
We are grateful to G. Raffelt and A. Ringwald for reading the manuscript and providing useful comments. We also thank Y. Fujitani and N. Yokozaki for checking the calculations. This work is supported by Tohoku University Division for Interdisciplinary Advanced Research and Education (R.D.), JSPS KAKENHI Grant Numbers JP15H05889 (F.T.), JP15K21733 (F.T.), JP26247042 (F.T), JP26287039 (F.T.), JP17H02875 (F.T.), JP17H02878 (F.T.), and by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan (F.T.).
Publisher Copyright:
© 2017 The Author(s)
PY - 2017/9/10
Y1 - 2017/9/10
N2 - We calculate a dipole–dipole potential between fermions mediated by a light pseudoscalar, axion, paying a particular attention to the overall sign. While the sign of the potential is physical and important for experiments to discover or constrain the axion coupling to fermions, there is often a sign error in the literature. The purpose of this short note is to clarify the sign issue of the axion-mediated dipole–dipole potential. As a by-product, we find a sign change of the dipole–dipole potenital due to the different spin of the mediating particle.
AB - We calculate a dipole–dipole potential between fermions mediated by a light pseudoscalar, axion, paying a particular attention to the overall sign. While the sign of the potential is physical and important for experiments to discover or constrain the axion coupling to fermions, there is often a sign error in the literature. The purpose of this short note is to clarify the sign issue of the axion-mediated dipole–dipole potential. As a by-product, we find a sign change of the dipole–dipole potenital due to the different spin of the mediating particle.
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U2 - 10.1016/j.physletb.2017.06.027
DO - 10.1016/j.physletb.2017.06.027
M3 - Article
AN - SCOPUS:85020851043
SN - 0370-2693
VL - 772
SP - 127
EP - 129
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -