On the Quantitative Sieve Parity Bypass under the Siegel Zero Hypothesis
This paper develops a quantitative form of the “exceptional-character bypass” of the sieve parity barrier for the binary Goldbach problem. The main statement is explicitly conditional: if a Siegel zero of exists, then the number of representations satisfies
with an effective constant . Thus the paper does not prove the Goldbach conjecture; it shows that in the presence of an exceptional zero — the scenario usually regarded as an obstruction to sieve methods — the parity barrier can be bypassed, with an explicit dependence of the threshold on .