Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1995-04-24
Int.J.Mod.Phys. A11 (1996) 229
Physics
High Energy Physics
High Energy Physics - Theory
22 pages, LaTex file
Scientific paper
10.1142/S0217751X96000110
Using mirror symmetry in Calabi-Yau manifolds M, three point functions of A(M)-model operators on the genus $0$ Riemann surface in cases of one-parameter families of $d$-folds realized as Fermat type hypersurfaces embedded in weighted projective spaces and a two-parameter family of $d$-fold embedded in a weighted projective space ${\amb}$ are studied. These three point functions ${\corr{\,{{\cal O}^{(1)}_{a}}\, {{\cal O}^{(l-1)}_{b}}\, {{\cal O}^{(d-l)}_{c}}\, }}$ are expanded by indeterminates ${q_l}$=${e^{2\pi i {t_l}}}$ associated with a set of {\kae} coordinates $\{{t_l}\}$ and their expansion coefficients count the number of maps. From these analyses, we can read fusion structure of Calabi-Yau A(M)-model operators. In our cases they constitute a subring of a total quantum cohomology ring of the A(M)-model operators. In fact we switch off all perturbation operators on the topological theories except for marginal ones associated with {\kae} forms of M. For that reason, the charge conservation of operators turns out to be a classical one.
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