### Zeros, Dips and Signs in pp and p$\rm\bf\bar p$ Elastic AmplitudesZeros, Dips and Signs in pp and p$\rm\bf\bar p$ Elastic Amplitudes

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 Author Pereira, Flavio ♦ Ferreira, Erasmo Source arXiv.org Content type Text File Format PDF Date of Submission 1999-07-19 Language English
 Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics Subject Keyword High Energy Physics - Phenomenology ♦ physics:hep-ph Abstract The dips observed in the differential cross sections of elastic pp and p$\bar{\rm p}$ scattering are studied in terms of the locations of the zeros of the real and imaginary parts of the amplitude and of the sign of real part at large $t$. It is confirmed that the differences in shapes of the dips in the pp and p$\bar{\rm p}$ systems are determined by a change of sign of the real tail, which seems to be determined by perturbative QCD contributions. Description Reference: Phys.Rev. D61 (2000) 077507 Educational Use Research Learning Resource Type Article Page Count 9