Conveners
Spin in Nuclear Reactions and Nuclei: Chair: Zenihiro Juzo
- Satoshi Sakaguchi (Dept. of Physics, Kyushu University)
- Georgi Georgiev (CSNSM/IN2P3/CNRS)
- Juzo ZENIHIRO (RIKEN Nishina Center)
Spin in Nuclear Reactions and Nuclei: Chair: Zenihiro Juzo
- There are no conveners in this block
Spin in Nuclear Reactions and Nuclei: Chair: Toshi-Aki Shibata
- Juzo ZENIHIRO (RIKEN Nishina Center)
- Georgi Georgiev (CSNSM/IN2P3/CNRS)
- Satoshi Sakaguchi (Dept. of Physics, Kyushu University)
Few nucleon systems offer good opportunities to investigate nuclear interactions. The recent topic of few-nucleon systems is to explore the properties of three-nucleon forces. We performed proton-3He elastic scattering at incident proton energies of 65 and 100 MeV with a polarized proton beam in conjunction with the polarized 3He target system. In the conference, we present the data in...
The study of three-nucleon forces (3NFs) is essential for clarifying various nuclear phenomena. The 3NFs arise naturally in the meson exchange model as well as in the framework of chiral effective field theory (EFT). With the aim of pinning down the 3NF effects in comparison with the rigorous numerical calculation based on the chiral EFT, we plan to measure the complete set of spin-correlation...
The results on the vector Ay and tensor Ayy and Axx analyzing powers in deuteron-proton elastic scattering at large transverse momenta are presented. These data were obtained at internal target at JINR Nuclotron in the energy range 400-1800 MeV using polarized deuteron beam from new polarized ion source. New data on the deuteron analyzing powers in the wide energy range demonstrate the...
Short-range correlated (SRC) NN pairs play an important role in structure of atomic nuclei and are actively studied using electron and proton beams [1]. Recently the reaction $^{12}$C+p➛$^{10}$A+pp+N was studied at BM@N in JINR [2] using the $^{12}$C beam at energy of 4 GeV/nucleon interacting with the hydrogen target to probe the SRC pairs {pN} in the $^{12}$C. The pp scattering in the...
While the electromagnetic charge distribution of protons inside nuclei has been well determined using electron scattering experiments, significant progress still needs to be made to reach the same level of precision for neutrons. The parity violating asymmetry in longitudinally polarized elastic electron-nucleus scattering is sensitive to the neutron RMS radius. The PREX-2 collaboration has...
The $^{48}$Ca nucleus provides an important testing ground for models (both density functional and ab-initio) trying to describe the arrangement of both protons and neutrons in nuclei. The parity violating electron scattering asymmetry from the unpolarized $^{48}$Ca nucleus gives direct access to its weak form factor. Using data collected with the CEBAF accelerator at Jefferson Lab in 2020 the...
The structure evolution of neutron-rich isotopes provides with many intriguing facets. Recently, we presented [1] how such evolution occurs in F-Ne-Na-Mg isotopes up to their neutron driplines, by using an ab initio effective nucleon-nucleon ($NN$) interaction derived from the chiral Effective Field Theory of QCD [2]. In this presentation, we shall report some features of the spin contents...
Due to recent advances in shell-model studies on spin modes in nuclei, precise evaluations of Gamow-Teller (GT) strengths become feasible and electron-capture and $\beta$-decay rates in stellar environments have been updated.
The weak rates in $sd$-shell obtained with the USDB Hamiltonian are applied to nuclear Urca processes in O-Ne-Mg cores in stars with 8-10 solar masses [1,2]. The Urca...
Single-spin asymmetry (AN) in the reaction p^ + A(p) -> pi0 X with transversely polarized proton beam in pp and pA collisions is analyzed within the framework of the phenomenological model of chromomagnetic polarization of quarks (CPQ) [1-5]. Numerous existing data are compared with model calculations, including recent measurements of pp, pAl and pAu collisions with c.m. energy √s = 200 GeV...
The axial vortical effect is considered for currents corresponding to hadrons of spin 1/2, 1 and 3/2. The density matrix approach suggested by Zubarev and developed by Becattini and collaborators is applied. The duality between statistical description in usual Minkowski space and geometry in the space with conical singularity is addressed. The interplay with anomalies calculations is outlined....
In this talk, I will disscuss the cos 2φ azimuthal angular correlation in rho^0 meson production in ultraperipheral heavy ion collisions. The asymmetry essentially results from the linear polarization of incident coherent photons, which just has been experimentally confirmed by the recent STAR measurement. The asymmetries evaluated in the dipole model for rho^0 photoproduction at RHIC and LHC...
