Constraining the in-medium nucleon-nucleon cross section from the width of nuclear giant dipole resonance

Wang, Rui; Zhang, Zhen; Chen, Lie-Wen; Ko, Che Ming; Ma, Yu-Gang

doi:10.1016/j.physletb.2020.135532

Title: Constraining the in-medium nucleon-nucleon cross section from the width of nuclear giant dipole resonance

Journal Article · Sat Aug 01 00:00:00 EDT 2020 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2020.135532· OSTI ID:1769504

; Zhang, Zhen; Chen, Lie-Wen; Ko, Che Ming; Ma, Yu-Gang

We develop a new lattice Hamiltonian method for solving the Boltzmann-Uehling-Uhlenbeck (BUU) equation. Adopting the stochastic approach to treat the collision term and using the GPU parallel computing to carry out the calculations allows for a rather high accuracy in evaluating the collision term, especially its Pauli blocking, leading thus to a new level of precision in solving the BUU equation. Applying this lattice BUU method to study the width of giant dipole resonance (GDR) in nuclei, where the accurate treatment of the collision term is crucial, we find that the obtained GDR width of ²⁰⁸Pb shows a strong dependence on the in-medium nucleon-nucleon cross section σ$$ ^∗_{NN}$$. A very large medium reduction of σ$$ ^∗_{NN}$$ is needed to reproduce the measured value of the GDR width of 208Pb at the Research Center for Nuclear Physics in Osaka, Japan.

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Research Organization:: Texas A & M Univ., College Station, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0015266

OSTI ID:: 1769504

Alternate ID(s):: OSTI ID: 1802724

Journal Information:: Physics Letters B, Journal Name: Physics Letters B Vol. 807 Journal Issue: C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: Netherlands

Language:: English

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79 ASTRONOMY AND ASTROPHYSICS
Astronomy & Astrophysics
Physics
Heavy-ion collisions
Transport models
Nuclear giant dipole resonance width
In-medium nucleon-nucleon cross section

Title: Constraining the in-medium nucleon-nucleon cross section from the width of nuclear giant dipole resonance

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