Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-06-16
Phys.Lett. B629 (2005) 83-92
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages and 5 figures. Final published form in Physics Letters B
Scientific paper
10.1016/j.physletb.2005.09.019
A new method for the determination of the real part of the elastic scattering amplitude is examined for high energy proton-proton elastic scattering at small momentum transfer. This method allows us to decrease the number of model assumptions, to obtain the real part in a narrow region of momentum transfer and to test different models. The real part is computed at a given point t_min near t=0 from the known Coulomb amplitude. Hence one obtains an important constraint on the real part of the forward scattering amplitude and therefore on the rho-parameter (measuring the ratio of the real to imaginary part of the scattering amplitude at t=0), which can be tested at LHC.
Gauron Pierre
Nicolescu Basarab
Selyugin O. V.
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