A Formula for Multi-Loop 4-Particle Amplitude in Superstring Theory
نویسنده
چکیده
Based on the recent developments of explicit computations at 2 loops in superstring theory in the covariant RNS formalism, we propose an explicit formula for the arbitrary loop 4-particle amplitude in superstring theory. We prove that this formula passes two very difficult tests: modular invariance and factorization. If proved, this shows that superstring theory is not only finite order by order in perturbation theory but is also exceptionally simple. E-mail: [email protected] Supported in part by fund from the National Natural Science Foundation of China with grant Number 10475104. Permanent address
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