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Type: Artigo de periódico
Title: Elastic pp scattering from the optical point to past the dip: An empirical parametrization from ISR to the LHC
Author: Fagundes, DA
Pancheri, G
Grau, A
Pacetti, S
Srivastava, YN
Abstract: We describe the main features of recent LHC data on elastic pp scattering through a simple parametrization to the amplitude, inspired by a model proposed by Barger and Phillips in 1973, comprised of two exponentials with a relative phase. Despite its simplicity, this parametrization reproduces two essential aspects of the elastic differential cross section: the well-known precipitous descent in the forward direction and a sharp 'dip' structure. To include a complete description of data sets near -t =0 lecting the proton form factor. We find good descriptions of LHC7 and ISR data in either case. The form-factor model allows simple predictions for higher energies through asymptotic theorems and asymptotic sum rules in impact parameter space. We present predictions for this model at higher LHC energies, which can be used to test whether asymptotia is reached. The black-disk limit in this model is seen to be reached only for root S 10(6) TeV.
Country: EUA
Editor: Amer Physical Soc
Citation: Physical Review D. Amer Physical Soc, v. 88, n. 9, 2013.
Rights: aberto
Identifier DOI: 10.1103/PhysRevD.88.094019
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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