TY - JOUR
T1 - Compactifications of F-theory on Calabi-Yau threefolds at constant coupling
AU - Ahn, Changhyun
AU - Nam, Soonkeon
PY - 1998/2/11
Y1 - 1998/2/11
N2 - Generalizing the work of Sen, we analyze special points in the moduli space of the compactification of the F-theory on elliptically fibered Calabi-Yau threefolds where the coupling remains constant. These contain points where they can be realized as orbifolds of six torus T6 by Zm × Zn(m,n = 2,3,4,6). At various types of intersection points of singularities, we find that the enhancement of gauge symmetries arises from the intersection of two kinds of singularities. We also argue that when we take the Hirzebruch surface as a base for the Calabi-Yau threefold, the condition for constant coupling corresponds to the case where the point like instantons coalesce, giving rise to enhanced gauge group of Sp(k).
AB - Generalizing the work of Sen, we analyze special points in the moduli space of the compactification of the F-theory on elliptically fibered Calabi-Yau threefolds where the coupling remains constant. These contain points where they can be realized as orbifolds of six torus T6 by Zm × Zn(m,n = 2,3,4,6). At various types of intersection points of singularities, we find that the enhancement of gauge symmetries arises from the intersection of two kinds of singularities. We also argue that when we take the Hirzebruch surface as a base for the Calabi-Yau threefold, the condition for constant coupling corresponds to the case where the point like instantons coalesce, giving rise to enhanced gauge group of Sp(k).
UR - http://www.scopus.com/inward/record.url?scp=0346206565&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(97)01477-9
DO - 10.1016/S0370-2693(97)01477-9
M3 - Article
AN - SCOPUS:0346206565
SN - 0370-2693
VL - 419
SP - 132
EP - 138
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-4
ER -