Nuclear Theory·nucl-th

Thursday·February 16, 2017

6 papers—3 primary·3 cross-listed

01
$^{7}$ Li( $d$ , $p$ ) $^{8}$ Li transfer reaction in the NCSM/RGM approach
F. Raimondi🇬🇧 · G. Hupin🇫🇷 · P. Navrátil🇨🇦 · S. Quaglioni🇺🇸
Recently, we applied an $ab$ $ini t i o$ method, the no-core shell model combined with the resonating group method, to the transfer reactions with light p-shell nuclei as targets and deuteron as the projectile. In particular, we studied the elastic scattering of deuterium on $^{7}$ Li and the $^{7}$ Li( $d$ , $p$ ) $^{8}$ Li transfer reaction starting from a realistic two-nucleon interaction. In this contribution, we review of our main results on the $^{7}$ Li( $d$ , $p$ ) $^{8}$ Li transfer reaction, and we extend the study of the relevant reaction channels, by showing the dominant resonant phase shifts of the scattering matrix. We assess also the impact of the polarization effects of the deuteron below the breakup on the positive-parity resonant states in the reaction. For this purpose, we perform an analysis of the convergence trend of the phase and eigenphase shifts, with respect to the number of deuteron pseudostates included in the model space.
nucl-thJ.Phys.Conf.Ser.(2018)·0 citations
02
Status of Alpha-Particle Condensate Structure of the Hoyle State
Akihiro Tohsaki🇯🇵 · Hisashi Horiuchi🇯🇵 · Peter Schuck🇫🇷 · Gerd Roepke🇩🇪
The present understanding of the structure of the Hoyle state in 12C is reviewed. Most of the theoretical approaches to the Hoyle state are shortly summarized. The corresponding results are analyzed with respect to whether they give evidence to the alpha particle condensation structure of the Hoyle state (and other Hoyle-like states in heavier self-conjugate nuclei) or not.
nucl-thRMP(2017)·101 citations
03
Quark model study of the $π N \to π N$ reactions up to the $N (1440)$ resonance region
Kai-Lei Wang🇨🇳 · Li-Ye Xiao🇨🇳 · Xian-Hui Zhong🇨🇳
A combined analysis of the reactions $π^{+} p \to π^{+} p$ , $π^{-} p \to π^{-} p$ and $π^{-} p \to π^{0} n$ is carried out with a chiral quark model. The observations are reasonably described from the $Δ (1232)$ resonance region up to the $N (1440)$ resonance region. Besides the $Δ (1232) P_{33}$ , a confirmed role of $N (1440) P_{11}$ is found in the polarizations of the $π^{-} p \to π^{-} p$ and $π^{-} p \to π^{0} n$ reactions. It is found that the $N (1440) N π$ and $Δ (1232) N π$ couplings are about $1.7$ and $4.8$ times larger than the expectations from the simple quark model, respectively, which may suggest the unusual property of $N (1440) P_{11}$ and deficiency of the simple quark model in the description of $N (1440) P_{11}$ and $Δ (1232) P_{33}$ . The $t$ - and $u$ -channel backgrounds have notable contributions to the $π^{+} p \to π^{+} p$ reaction, while in the $π^{-} p \to π^{-} p, π^{0} n$ reactions, the $s$ -channel nucleon and $t$ - and $u$ -channel backgrounds play crucial roles.
nucl-thhep-phnucl-exPRC(2017)·5 citations

Affiliations

first authorsco-authorsvia INSPIRE

7Li(d,p)8Li transfer reaction in the NCSM/RGM approach

Status of Alpha-Particle Condensate Structure of the Hoyle State

Quark model study of the πN→πN reactions up to the N(1440) resonance region

Affiliations

$^{7}$ Li( $d$ , $p$ ) $^{8}$ Li transfer reaction in the NCSM/RGM approach

Quark model study of the $π N \to π N$ reactions up to the $N (1440)$ resonance region