Nuclear Theory·nucl-th

Monday·January 21, 2019

10 papers—7 primary·3 cross-listed

08
[Submitted on 17 Jan 2019] (cross-list from hep-ph)
Rapidity dependent transverse momentum spectra of heavy quarkonia produced in small collision systems at the LHC
Li-Na Gao🇨🇳 · Fu-Hu Liu🇨🇳 · Bao-Chun Li🇨🇳
The rapidity dependent transverse momentum spectra of heavy quarkonia (J/psi and Upsilon mesons) produced in small collision systems such as proton-proton (pp) and proton-lead (p-Pb) collisions at center-of-mass energy (per nucleon pair) 5-13 TeV are described by a two-component statistical model which is based on the Tsallis statistics and inverse power-law. The experimental data measured by the LHCb Collaboration at the Large Hadron Collider (LHC) are well fitted by the model results. The related parameters are obtained and the dependences of parameters on rapidity are analyzed.
Comments:
17 pages, 11 figures. Advances in High Energy Physics, accepted
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
1901.05823 [pdf]
Adv.High Energy Phys.(2019)·6 citations
09
[Submitted on 18 Jan 2019] (cross-list from hep-ph)
Nucleon resonance production in the $γ p \to p η ϕ$ reaction
Jin-Quan Fan · Shao-Fei · Chen · Bo-Chao Liu
In this work, we perform a study of nucleon resonance production in the $γ p \to p η ϕ$ reaction within an effective Lagrangian approach. In our model, we consider the excitation of the $N^{*} (1535)$ , $N^{*} (1650)$ , $N^{*} (1710)$ and $N^{*} (1720)$ in the intermediate state and the background term. We find that this reaction is dominated by the excitation of the $N^{*} (1535)$ in the near threshold region. Especially, we study the possible role of the scalar meson exchange in this reaction. It is found that the $f_{0} (980)$ exchange may give a significant contribution and the parity asymmetry can be used to identify its role in this reaction.
Comments:
6 pages, 4 figures, Accepted for publication in Phys. Rev. C
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1901.06223 [pdf]
PRC(2019)·11 citations
10
[Submitted on 18 Jan 2019] (cross-list from physics.atom-ph)
Nuclear Charge Radii of $^{10, 11}$ B
Bernhard Maaß · Thomas Hüther · Jan Krause · Jörg Krämer · Kristian König · Alessandro Lovato · Peter Müller · Mariusz Puchalski · Krzysztof Pachucki · Robert Roth · Rodolfo Sánchez · Felix Sommer · R. B. Wiringa · Wilfried Nörtershäuser
The first determination of the nuclear charge radius by laser spectroscopy for a five-electron system is reported. This is achieved by combining high-accuracy ab initio mass-shift calculations and a high-resolution measurement of the isotope shift in the $2 s^{2} 2 p^{2} P_{1/2} \to 2 s^{2} 3 s^{2} S_{1/2}$ ground state transition in boron atoms. Accuracy is increased by orders of magnitude for the stable isotopes $^{10, 11}$ B and the results are used to extract their difference in the mean-square charge radius $⟨ r_{c}^{2} ⟩^{11} - ⟨ r_{c}^{2} ⟩^{10} = - 0.49 (12) fm^{2}$ . The result is qualitatively explained by a possible cluster structure of the boron nuclei and quantitatively used as a benchmark for new ab initio nuclear structure calculations using the no-core shell model and Green's function Monte Carlo approaches.
Subjects:
Atomic Physics (physics.atom-ph); Nuclear Theory (nucl-th)
arXiv:
1901.06323 [pdf]
PRL(2019)·34 citations

Affiliations

first authorsco-authorsvia INSPIRE

Rapidity dependent transverse momentum spectra of heavy quarkonia produced in small collision systems at the LHC

Nucleon resonance production in the γp→pηϕ reaction

Nuclear Charge Radii of 10,11B

Affiliations

Nucleon resonance production in the $γ p \to p η ϕ$ reaction

Nuclear Charge Radii of $^{10, 11}$ B