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Transparencies pdf - Desy

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Length of the walk rapidity, y as each step a change in rapidity of few units<br />

Implications:<br />

∝<br />

n ∝ y =⇒ R 2 = R 2 0 + cy ≡ R 2 0 + c ′ lns<br />

(a) The transverse size of the soft wee parton cloud should logarithmically grow wit<br />

energy.<br />

Logarithmic increase of the t-slope of the elastic hadron-hadron scattering<br />

amplitude with energy:<br />

f (t) ∝ exp(Bt/2), B(s) = B0 + 2α ′ ln(s/s0)<br />

α ′ ∝ 1/k 2 t0<br />

6<br />

6

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