Low Energy Nuclear Structure from Ultrarelativistic Heavy-Light Ion collisions

Arriola, E. Ruiz; Broniowski, Wojciech

doi:10.1088/1742-6596/630/1/012060

Cited by 8 publications

(9 citation statements)

References 45 publications

(84 reference statements)

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“…with the spinless partial wave expansion of the scattering amplitude 5 We use a slightly different form than the original Glauber formulation [25], more suitable for numerical work, since care must be exercised with the handling of derivatives at the end-point singularity at b = r. Our form was used in the NN analysis of Ref. [41].…”

Section: Amplitudes and Parameterizationmentioning

confidence: 99%

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 Parameterizationmentioning

confidence: 99%

Proton-proton hollowness at the LHC from inverse scattering

Arriola

Broniowski

2017

Phys. Rev. D

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“…Solving the BS equation becomes very complicated and for a phenomenological kernel is not truly essential. Instead, we use a minimal relativistic approach [25] based on the squared mass operator [26] defined as M 2 = P µ P µ + V , where V represents the (invariant) interaction determined in the CM frame by matching to the non-relativistic limit with a local and energy-dependent phenomenological optical potential, V (r, s) = ReV (r, s) + iImV (r, s). This yields V = 8M N V (r, s); it could be obtained by fitting elastic scattering data [25].…”

Section: The On-shell Optical Potentialmentioning

confidence: 99%

Proton–Proton On Shell Optical Potential at High Energies and the Hollowness Effect

Arriola

Broniowski

2016

Few-Body Syst

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We analyze the usefulness of the optical potential as suggested by the double spectral Mandelstam representation at very high energies, such as in the proton-proton scattering at ISR and the LHC. Its particular meaning regarding the interpretation of the scattering data up to the maximum available measured energies is discussed. Our analysis reconstructs 3D dynamics from the effective transverse 2D impact parameter representation and suggests that besides the onset of gray nucleons at the LHC there appears an inelasticity depletion (hollowness) which precludes convolution models at the attometer scale.

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“…For situation when B is perpendicular to z, we observed more wounded nucleons for m = 3/2 than for m = 1/2 (panel (b)). cleons, we find θ, φ| 3 2 , m…”

Section: Proton-polarized Light Nucleus Scatteringmentioning

confidence: 82%

“…The structure of nuclei involving α clusters continues to be a subject of very active studies (see [1] for a recent review, [2] for a historical perspective, [3] for a discussion of clustering mass formulas and form factors as manifestations of the geometric structure, and [4][5][6][7][8][9] for additional information), exploring the ideas dating back to Gamow's original clusterization proposal [10] with modern theoretical [11][12][13] and computational [14][15][16][17][18][19] methods, as well as with anticipated new experimental prospects [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Signatures of α clustering in ultrarelativistic collisions with light nuclei

2018

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We explore possible observable signatures of α clustering of light nuclei in ultra-relativistic nuclear collisions involving 7,9 Be, 12 C, and 16 O. The clustering leads to specific spatial correlations of the nucleon distributions in the ground state, which are manifest in the earliest stage of the ultra-high energy reaction. The formed initial state of the fireball is sensitive to these correlations, and the effect influences, after the collective evolution of the system, the hadron production in the final stage. Specifically, we study effects on the harmonic flow in collisions of light clustered nuclei with a heavy target ( 208 Pb), showing that measures of the elliptic flow are sensitive to clusterization in 7,9 Be, whereas triangular flow is sensitive to clusterization in 12 C and 16 O. Specific predictions are made for model collisions at the CERN SPS energies. In another exploratory development we also examine the proton-beryllium collisions, where the 3/2 − ground state of 7,9 Be nucleus is polarized by an external magnetic field. Clusterization leads to multiplicity distributions of participant nucleons which depend on the orientation of the polarization with respect to the collision axis, as well as on the magnetic number of the state. The obtained effects on multiplicities reach a factor of a few for collisions with a large number of participant nucleons.

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Low Energy Nuclear Structure from Ultrarelativistic Heavy-Light Ion collisions

Cited by 8 publications

References 45 publications

Proton-proton hollowness at the LHC from inverse scattering

Proton-proton hollowness at the LHC from inverse scattering

Proton–Proton On Shell Optical Potential at High Energies and the Hollowness Effect

Signatures of α clustering in ultrarelativistic collisions with light nuclei

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