152 citations · 994 across the 41 of their papers we have counts for
Showing 2007Show all
3 papers · 1 filter
hep-th2007★ 50 cited
Higher Order Couplings from Heterotic Orbifold Theory
Kang-Sin Choi, Tatsuo Kobayashi
We calculate couplings of arbitrary order from correlation functions among twisted strings, using conformal field theory. Twisted strings arise in heterotic string compactified on…
hep-ph2007★ 24 cited
Discrete R-symmetry anomalies in heterotic orbifold models
Takeshi Araki, Kang-Sin Choi, Tatsuo Kobayashi +2
Anomalies of discrete R-symmetries appearing in heterotic orbifold models are studied. We find that the mixed anomalies for different gauge groups satisfy the universal Green-Schwa…
hep-ph2007★ 49 cited
String compactification, QCD axion and axion-photon-photon coupling
Kang-Sin Choi, Ian-Woo Kim, Jihn E. Kim
It is pointed out that there exist a few problems to be overcome toward an observable sub-eV QCD axion in superstring compactification. We give a general expression for the axion d…