328 research outputs found

    Behavior of the Hadron Potential at Large Distances and Properties of the Hadron Spin-flip Amplitude

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    The impact of the form of the hadron potential at large distances on the behaviour of the hadron spin-flip amplitude at small angles is examined. The tt-dependence of the spin-flip amplitude of high energy hadron elastic scattering is analyzed under different assumptions on the hadron interaction. It is shown that the long tail of the non-Gaussian form of the hadron potential of the hadron interaction in the impact parameter representation leads to a large value of the slope of the spin-flip amplitude (without the kinematical factor ∣t∣\sqrt{|t|}) as compared with the slope of the spin-non-flip amplitude. This effect can explain the form of the differential cross section and the analyzing power at small transfer momenta. The methods for the definition of the spin-dependent part of the hadron scattering amplitude are presented. A possibility to investigate the structure of the hadron spin-flip amplitude from the accurate measure of the differential cross section and the spin correlation parameters is shown.Comment: 13 pages, LaTeX, 3 figures.p

    Can experimental tests of Bell inequalities performed with pseudoscalar mesons be definitive?

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    We discuss if experimental tests of Bell inequalities performed with pseudoscalar mesons (K or B) can be definitive. Our conclusion is that this is not the case, for the efficiency loophole cannot be eliminated.Comment: submitted for publicatio

    Of Dips, Structures and Eikonalization

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    We have investigated several models of Pomeron and Odderon contributions to high energy elastic pppp and pˉp\bar p p scattering. The questions we address concern their role in this field, the behavior of the scattering amplitude (or of the total cross-section) at high energy, and how to fit all high energy elastic data. The data are extremely well reproduced by our approach at all momenta and for sufficiently high energies. The relative virtues of Born amplitudes and of different kinds of eikonalizations are considered. An important point in this respect is that secondary structures are predicted in the differential cross-sections at increasing energies and these phenomena appear quite directly related to the procedure of eikonalizing the various Born amplitudes. We conclude that these secondary structures arise naturally within the eikonalized procedure (although their precise localization turns out to be model dependent). The fitting procedure naturally predicts the appearance of a zero at small ∣t∣|t| in the real part of the even amplitude as anticipated by general theorems. We would like to stress, once again, how important it would be to have at LHC both pppp and ppˉp \bar p options for many questions connected to the general properties of high energy hadronic physics and for a check of our predictions.Comment: 28 pages, LaTeX, 7 figure
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