Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-05-23
Nucl.Phys. B511 (1998) 243-263
Physics
High Energy Physics
High Energy Physics - Theory
Discussion of the discrepancy with M(atrix)-theory is clarified. We emphasize the fact that the main problem is not a numerica
Scientific paper
10.1016/S0550-3213(97)00654-8
Scattering of zero branes off the fixed point in $R^8/Z_2$, as described by a super-quantum mechanics with eight supercharges, displays some novel effects relevant to Matrix theory in non-compact backgrounds. The leading long distance behaviour of the moduli space metric receives no correction at one loop in Matrix theory, but does receive a correction at two loops. There are no contributions at higher loops. We explicitly calculate the two-loop term, finding a non-zero result. We find a discrepancy with M(atrix)-theory. Although the result has the right dependence on $v$ and $b$ for the scattering of zero branes off the fixed point the factors of $N$ do not match. We also discuss scattering in the orbifolds, $R^5/Z_2$ and $R^9/Z_2$ where we find the predicted fractional charges.
Ganor Ori J.
Gopakumar Rajesh
Ramgoolam Sanjaye
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