Unitarisation dependence of diffractive scattering in light of high-energy collider data
| Autor: | Aparna Bhattacharya, Rami Oueslati, Jean-René Cudell, Arno Vanthieghem |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Nuclear and High Energy Physics High energy Particle physics Eikonal equation Scattering FOS: Physical sciences Cosmic ray QC770-798 QCD Phenomenology law.invention High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Amplitude Unitarisation law Nuclear and particle physics. Atomic energy. Radioactivity Collider Deep Inelastic Scattering (Phenomenology) |
| Zdroj: | Journal of High Energy Physics, Vol 2021, Iss 9, Pp 1-16 (2021) Journal of High Energy Physics |
| ISSN: | 1029-8479 |
| Popis: | We study the consequences of high-energy collider data on the best fits to total, elastic, inelastic, and single-diffractive cross sections for $pp$ and $p \bar{p}$ scattering using different unitarisation schemes. We find that the data are well fitted both by eikonal and U-matrix schemes, but that diffractive data prefer the U-matrix. Both schemes may be generalised by means of an additional parameter; however, this yields only marginal improvements to the fits. We provide estimates for $\rho$, the ratio of the real part to the imaginary part of the elastic amplitude, for the different fits. We comment on the effect of the different schemes on present and future cosmic ray data. Comment: to be published in JHEP; 15 pages, 2 figures |
| Databáze: | OpenAIRE |
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