[hep-ph/9707258] Local nuclear slope and curvature in high energy $pp$ and $\bar pp$ elastic scattering

High Energy Physics - Phenomenology, abstract
hep-ph/9707258



From: martynov@gluk.apc.org



Date: Mon, 7 Jul 1997 01:04:36 +0200 (EET) (44kb)

Local nuclear slope and curvature in high energy $pp$ and $\bar pp$ elastic scattering

Authors: P. Desgrolard , J. Kontros , A.I Lengyel , E.S.Martynov
Comments: PlainTeX, 24 pages, 5 ps-figures included, to be published in Il Nuovo Cimento
Report-no: LYCEN 9721
Journal-ref: Nuovo Cim. A110 (1997) 615-630
The local nuclear slope $B(s,t) = {d \over d t} (\ln {d\sigma_n (s,t)\over dt})$ is reconstructed from the experimental angular distributions with a procedure that uses overlapping $t$-bins, for an energy that ranges from the ISR to the $S\bar ppS$ and the Tevatron. Predictions of several models of ($p,p$) and ($\bar p,p$) elastic scattering at high energy are tested in $B(s,t)$ at small $|t|$. Only a model with two-components Pomeron and Odderon gives a satisfactory agreement with the (non fitted) slope data, in particular for the evolution of $B(s,t)$ with $s$ as a function of $t$ in $\bar pp$ scattering. This model predicts a similar behavior for $pp$ and $\bar pp$ scattering at small $|t|$. A detailed confirmation for $pp$ collisions would be expected from RHIC.

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