from Fig. \[fig:5\] that the survival factor $S^2$ is about 3–4 times larger for $h(0^-)$ as compared to $h(0^+)$ production. This is a reflection of the more peripheral nature of $h(0^-)$ production. For the same reason the suppression $S^2$ obtained when integrating over the small $p_{i\perp}$ domain, $p_{i\perp}<0.35~\GeV$, is less than when integrating over all $p_{i\perp}$, since it is more weighted to the larger values of the impact parameter $b$.

Finally in Fig. \[fig:6\] we show the predictions for the effective luminosity with the absorptive effects included. The original $\sin^2\phi$ and constant behaviours of $h(0^-)$ and $h(0^+)$, respectively, are distorted first by the $\vec p_{3\perp}\cdot \vec p_{4\perp}/Q^2$ type corrections from the integration over the gluon loop in Fig. \[fig:4\], and then by the absorptive effects given by the suppression factors $S^2$ shown in Fig. \[fig:5\].

Consequences for signals in the Higgs sector {#sec:5}
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We have studied the central [*exclusive*]{} diffractive production of bosons via the process $pp\to p + h + p$, and emphasized that correlations between the outgoing proton momenta reflect the spin-parity of $h$. As a topical example to illustrate these properties we compared $h(0^+)$ and $A(0^-)\equiv h(0^-)$ Higgs production. In particular, Fig. \[fig:6\] shows that the 