Diffractive Component inppCollisions at 102 and 405 GeV

Abstract

We study the diffractive component in $\mathrm{pp}$ collisions at 102 and 405 GeV and examine its energy dependence in $M^2$ and $x$ variables. The total cross section for $\mathrm{}\left|x\right|>0.9\mathrm{}$ remains approximately constant: 6.6±0.5 and 6.8±0.7 mb at the two energies. However, both $\frac{d\sigma }{\mathrm{dx}}$ and $\frac{d\sigma }{d{M}^2}$ show strong energy dependence within the $\mathrm{}\left|x\right|>0.9\mathrm{}$ region. The energy and $M^2$ dependences of $\frac{d\sigma }{d{M}^2}$ do not have the characteristics of a triple-Pomeron term for $0.90<\mathrm{}\left|x\right|<0.99\mathrm{}$.