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Nuclear Theory·nucl-th

Thursday·June 22, 2017

4 papers—2 primary·2 cross-listed

All4Primary2Cross-lists2
  1. 03

    Decuplet to octet baryon transitions in chiral perturbation theory

    Hao-Song Li🇨🇳 · Zhan-Wei Liu🇨🇳 · Xiao-Lin Chen🇨🇳 · Wei-Zhen Deng🇨🇳 · Shi-Lin Zhu🇨🇳

    We have systematically investigated the decuplet (T) to octet (B) baryon () transition magnetic moments to the next-to-next-to-leading order and electric quadruple moments to the next-to-leading order in the framework of the heavy baryon chiral perturbation theory. Our calculation includes the contributions from both the intermediate decuplet and octet baryon states in the loops. Our results show reasonably good convergence of the chiral expansion and agreement with the experimental data. The analytical expressions may be useful to the chiral extrapolation of the lattice simulations of the decuplet electromagnetic properties.

    ↳ hep-phhep-exhep-latnucl-ex+1EPJC(2019)·19 citations
  2. 04

    Nuclear modification of forward production in pPb collisions at the LHC

    Hirotsugu Fujii🇯🇵 · Kazuhiro Watanabe🇺🇸

    We study nuclear modification factors for single meson and semileptonic decay lepton () production in minimum bias proton-nucleus (p) collisions at the LHC in the color-glass-condensate (CGC) framework at leading order in strong coupling. In our numerical computations, transverse momentum () dependent multi-point Wilson line correlators are employed for describing target nucleus for p and proton for pp. The projectile proton is treated with unintegrated gluon distribution function, which is also -dependent. The rapidity evolutions of these functions in the small Bjorken region are taken into account by solving running coupling Balitsky-Kovchegov (BK) equation at leading logarithmic accuracy. For simplicity, we employ Kartvelishvili's type fragmentation function and a simple model for lepton energy distribution from seileptonic decay, respectively, to compute differential cross sections for and production. The gluon saturation scale inside the heavy nucleus is enhanced and dependent on , which we take into account by replacing the initial saturation scale in the BK equation with a larger value for the heavy nucleus. We show that the saturation effect leads to perceptible nuclear suppression of production at forward rapidity. Our numerical results predict similar nuclear suppressions in p collisions for forward production at lower transverse momentum . Numerical tables on the nuclear modifications of and are listed in this note.

    ↳ hep-phhep-exnucl-exnucl-th21 citations

Affiliations

first authorsco-authorsvia INSPIRE