Changes

It is doubtful that this is needed, because the range in ''s'' covered by GlueX is very small, and one expects to carry out independent fits for different ranges in t.  However, it might be useful at some point to do a global fit to all s,t values.  In such a case, it is useful to recall the expected behavior in high-energy peripheral production given by Regge theory.

It is doubtful that this is needed, because the range in ''s'' covered by GlueX is very small, and one expects to carry out independent fits for different ranges in t.  However, it might be useful at some point to do a global fit to all s,t values.  In such a case, it is useful to recall the expected behavior in high-energy peripheral production given by Regge theory.

:<math>

:<math>

\sigma ~ s^{\alpha_R-1} e^bt

\sigma \sim s^{\alpha_R-1} e^bt

</math>

</math>

where <math>\alpha_R</math> is the intercept of the Regge trajectory for exchange particle ''R'', and b is the forward t-slope parameter for exchange trajectory ''R'' at this value of ''s''.

where <math>\alpha_R</math> is the intercept of the Regge trajectory for exchange particle ''R'', and b is the forward t-slope parameter for exchange trajectory ''R'' at this value of ''s''.