An impact parameter analysis of proton-proton elastic and inelastic interactions at 360 GeV/c

Bailly, J. L.; Banerjee, S.; Bruyant, F.; Buschbeck, B.; Dibon, H.; Diez-Hedo, F.; Ferrando, A.; Fontanelli, F.; Golubkov, Yu. A.; Hamatsu, R.; Herquet, P.; Hrubec, J.; Iga, Y.; Ivanyushenkov, Y.; Khalatyan, N.; Kistenev, E.; Kitamura, S.; Kohli, J. M.; Kubik, V.; Kühn, D.; Levchenko, B. B.; MacNaughton, J.; Montanet, L.; Neuhofer, G.; Ohta, Akio; Pintér, G.; Porth, P.; Raghavan, R.; Rasner, K.; Rodrigo, T.; Salicio, J.; Singh, J. B.; Squarcia, S.; Takahashi, K.; Тихонова, Л. А.; Trevisan, U.; Tsurugai, T.; Zholobov, G.; Bogoljubski, M. Yu.

doi:10.1007/bf01442063

Cited by 10 publications

(4 citation statements)

References 14 publications

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“…[45]. We have checked that our results are similar if we take the Bailly et al [46] parametrization ρ(s, t) = ρ 0 (s)/(1 − t/t 0 (s)), [17] with the inclusion of the ρ parameter according to Eq. ( 22), compared to experimental vales (lower rows).…”

Section: Amplitudes and Parameterizationsupporting

confidence: 60%

“…[45]. We have checked that our results are similar if we take the Bailly et al [46] parametrization ρ(s, t) = ρ 0 (s)/(1 − t/t 0 (s)), where t 0 (s) is the position of the diffractive minimum. Nevertheless, the results in the impact parameter representation do depend to some extent on the form of ρ(s, t) [45] and the issue is intimately related to the separation of the strong amplitude from the Coulomb part.…”

Section: Amplitudes and Parameterizationsupporting

confidence: 56%

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Proton-proton hollowness at the LHC from inverse scattering

Arriola

Broniowski

2017

Phys. Rev. D

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Parameterizations of the pp scattering data at the LHC collision energies indicate a hollow in the inelasticity profile of the pp interaction, with less absorption for head-on collisions than at a non-zero impact parameter. We show that some qualitatively unnoticed features may be unveiled by a judicious application of the inverse scattering problem in the eikonal approximation and interpre- tation within an optical potential model. The hollowness effect is magnifed in a 3D picture of the optical potential, and will presumably be enhanced at yet higher energies. Moreover, in 3D it sets in at much smaller energies than at the LHC. We argue that hollowness in the impact parameter is a quantum effect, relying on the build-up of the real part of the eikonal scattering phase and its possible passage through $\pi/2$. We also show that it precludes models of inelastic collisions where inelasticity is obtained by naive folding of partonic densities.Comment: 9 pages, 6 figures,expanded version with further discussion

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Section: Amplitudes and Parameterizationsupporting

confidence: 60%

Section: Amplitudes and Parameterizationsupporting

confidence: 56%

Proton-proton hollowness at the LHC from inverse scattering

Arriola

Broniowski

2017

Phys. Rev. D

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“…[20]. Our results presented below are similar if we take, e.g., the Bailly et al [21] parametrization ρ(s, t) = ρ 0 (s)/(1 − t/t 0 (s)), where t 0 (s) is the position of the diffractive minimum. However, admittedly, there is some dependence 6), showing that that the range of the experimental data in q is sufficient to carry out the Fourier-Bessel transform for the values of b of interest.…”

supporting

confidence: 75%

Hollowness in $pp$ Scattering

Broniowski¹,

Arriola²

2017

Acta Phys. Pol. B

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It is argued that the hollowness effect (depletion in the absorptive part of the scattering cross section at small values of the impact parameter) in the proton-proton scattering at the the LHC energies finds its origin in the quantum nature of the process, resulting in large values of the real part of the eikonal phase. The effect cannot be reconciled with an incoherent superposition of the absorption from the proton constituents, thus suggests the change of this basic paradigm of high-energy scattering. PACS: 13.75.Cs, 13.85.Hd In this talk we discuss the significance of the recent pp scattering results from the Large Hadron Collider for our understanding of the underlying physical processes in highest-energy collisions. In particular, we argue that the hollowness in the inelastic cross section treated as a function of the impact parameter b, i.e., its depletion at low b, must necessarily originate from quantum coherence, precluding a probabilistic folding interpretation. More details of our analysis can be found in [1,2], where we also analyze the effect in 3-dimensions via the optical potential interpretation.

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“…Two quite different dependencies of hadronic phase have been then shown in the quoted paper. The first phase was the so-called "standard" phase (used, e.g., in [32] for interpretation of experimental data) and the second phase corresponded to natural peripheral elastic collisions. Both the hadronic phases are plotted in Fig.…”

Section: Proton-proton Collisions In Impact Parameter Spacementioning

confidence: 99%