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Nucleon-nucleon correlation functions from different interactions in comparison

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arxiv 2505.13433 v1 pith:K7P3ZFCW submitted 2025-05-19 nucl-th nucl-ex

classification nucl-thnucl-ex
keywords correlationdifferentinteractionsfunctionsnucleon-nucleonsystemcorrelationsfunction
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Correlation functions as they can be observed in heavy-ion collisions using the femtoscopy technique are a powerful tool to study the interaction among different baryons or mesons. Specifically, the multi-nucleon correlation functions have been under intense experimental and theoretical investigation in the recent years. Due to the interest of using this observable as an input in the construction of potentials between hadrons we revisit the nucleon-nucleon correlation function and calculate it using different nuclear interactions at high precision. Since the nucleon-nucleon potential is determined to reproduce the two-nucleon scattering data, we would like to critically evaluate the amount of this information captured by the correlation function. We study the dependence of the correlations on the nuclear force giving detailed insights into the calculations, in particular the convergence behavior in the partial waves. The coupling between the different partial-wave channels is taken into account and the relevance of this effect is quantified. To make contact with precedent studies the results based on the Argonne V18 interaction are presented. Then we consider also the Norfolk NV2-IIa and NV2-IIb chiral EFT interactions. The analysis of the differences between the correlations of the various interactions shows that for momenta between 0 and 500 MeV there are variations of up to 5.9 % for the $nn$ system, of up to 1.8 % for the $np$ system, and of 1.4 % for the $pp$ system.

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Cited by 3 Pith papers

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

  1. Spectroscopic and femtoscopic insights into vector-baryon interactions in the strangeness $-1$ sector

    hep-ph 2025-07 conditional novelty 6.0 of 10

    The authors predict three Lambda* and two Sigma* resonances from vector-baryon interactions and provide femtoscopy correlation functions for six channels in the S=-1 sector.

  2. Probing the structure of the $D_{s 0}^*(2317)$ and $X(3872)$ states through correlation functions

    hep-ph 2025-06 conditional novelty 6.0 of 10

    Femtoscopic correlation functions for D0K+ and D0Dbar*0 pairs are predicted to be sensitive to the molecular versus bare-state composition of D_s0*(2317) and X(3872).

  3. Off-shell ambiguities in correlation functions: strategies to minimize them

    hep-ph 2025-06 conditional novelty 5.0 of 10

    For meson-baryon pairs tied to the N*(1535), off-shell ambiguities change correlation functions by only 2-3% in chiral models, and can be partly absorbed by adjusting the source size.

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