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Probing nuclear structure with mean transverse momentum in relativistic isobar collisions

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arxiv 2111.14812 v1 pith:2YSJ5H3G submitted 2021-11-29 nucl-th nucl-ex

classification nucl-thnucl-ex
keywords collisionsnucleardeformationisobarlangleranglebulkevolution
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abstract

Transverse momentum ($p_{T}$) generation in relativistic heavy ion collisions is sensitive to the initial geometry and the final-state bulk evolution. We demonstrate with hydrodynamic calculations that the mean $p_T$ ratio ($R_{\langle p_{T}\rangle}$) between the highly similar isobar $^{96}_{44}$Ru+$^{96}_{44}$Ru and $^{96}_{40}$Zr+$^{96}_{40}$Zr collisions is insensitive to the bulk evolution and remains sensitive to the small difference in the initial nuclear structure (neutron skin and deformation) between the Ru and Zr nuclei.We further find that nuclear deformation can produce an anticorrelation between $R_{\langle p_{T}\rangle}$ and eccentricity (or elliptic flow) in central collisions. These findings suggest that the $R_{\langle p_{T}\rangle}$ between the isobar systems can be used to measure the neutron skin thickness and deformation parameters, which can in turn constrain the nuclear symmetry energy slope parameter.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Probing the tetrahedral $\alpha$ clusters in relativistic $^{16}$O + $^{16}$O collisions

    nucl-th 2025-07 conditional novelty 6.0 of 10

    In 16O+16O collisions, the normalized flow ratio Norm(v2{2}/v2{4}) is mostly insensitive to tetrahedral deformation while Norm(v2{2}/v3{2}) is sensitive to both deformation and alpha-cluster correlations, but only aft...

  2. Unraveling the neutron skin thickness through jet charge in deep inelastic scattering

    hep-ph 2025-06 conditional novelty 6.0 of 10

    Jet charge distributions in electron-ion collisions are shown to be sensitive to neutron skin thickness, with peripheral collisions suppressing positive jets and enhancing negative jets.

  3. Study the Longitudinal Entropy Deposition using d+Au Collision

    nucl-th 2026-07 conditional novelty 5.0 of 10

    A 3D entropy deposition model with β≈0.35 and n_BC-dependent rapidity loss, plus ab initio deuteron sampling, reproduces d+Au dNch/dη, spectra, and vn and transfers to p+Au, 3He+Au, and Au+Au.

  4. Nonlinear collective flow reveals the breakdown of quadrupole--hexadecapole scaling in heavy ion collisions

    nucl-th 2026-07 conditional novelty 5.0 of 10

    The nonlinear flow coefficient ξ6,222 in simulated U+U collisions separates the four (β2, β4) nuclear topology classes, making the sign of the hexadecapole deformation β4 experimentally accessible.

  5. Nuclear Physics Confronts Relativistic Collisions Of Isobars

    nucl-ex 2025-07 conditional novelty 5.0 of 10

    RHIC isobar data are explained by different shapes of 96Ru and 96Zr, with 96Zr showing a large octupole deformation, so nuclear structure uncertainty, not the magnetic field, dominates the observed ratios.

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