Nuclear Theory·nucl-th

Friday·November 11, 2016

8 papers—5 primary·3 cross-listed

01
[Submitted on 10 Nov 2016]
HoTCoffeeh: Hanbury Brown-Twiss correlation functions and radii from event-by-event hydrodynamics
Christopher Plumberg🇺🇸 · Ulrich Heinz🇺🇸
$HoTCoffeeh$ ( $H$ anbury Br $o$ wn- $T$ wiss $Co$ rrelation $f$ unctions and radii $f$ rom $e$ vent-by- $e$ vent $h$ ydrodynamics) is a new computational tool which determines Hanbury Brown-Twiss (HBT) charged pion ( $π^{+}$ ) correlation functions and radii for event-by-event (EBE) hydrodynamics with fluctuating initial conditions in terms of Cooper-Frye integrals, including resonance decay contributions. In this paper, we review the basic formalism for computing the HBT correlation functions and radii with resonance decay contributions included, and discuss our implementation of this formalism in the form of HoTCoffeeh. This tool may be easily integrated with other numerical packages for the purpose of simulating the evolution of heavy-ion collisions and thereby extracting predictions for heavy-ion observables.
Comments:
24 pages, 13 figures. This version corrects an error in version 1 in the computation of the resonance decay contributions. An appendix explaining the numerical code in greater detail was added. While many numerical results are affected by this correction, all main conclusions from version 1 remain valid. This version accepted by Phys. Rev. C
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
1611.03161 [pdf]
PRC(2018)·16 citations
02
[Submitted on 10 Nov 2016]
Does the Gogny interaction need a third Gaussian?
D. Davesne🇫🇷 · P. Becker🇫🇷 · A. Pastore🇬🇧 · J. Navarro🇪🇸
By considering infinite matter constraints only, we suggest in this paper that the Gogny interaction should benefit from a third Gaussian in its central part. A statistical analysis is given to select the possible ranges which are compatible with these constraints and which minimize a $χ^{2}$ function.
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1611.03266 [pdf]
Acta Phys.Polon.B(2017)·5 citations
03
[Submitted on 10 Nov 2016]
Formation of hypernuclei in evaporation and fission processes
A.S. Botvina🇩🇪 · N. Buyukcizmeci🇹🇷 · A. Ergun🇹🇷 · R.Ogul🇹🇷 · M. Bleicher🇩🇪 · J. Pochodzalla🇩🇪
There are excellent opportunities to produce excited heavy hyper residues in relativistic hadron and peripheral heavy-ion collisions. We investigate the disintegration of such residues into hyper nuclei via evaporation of baryons and light clusters and their fission. Previously these processes were well known for normal nuclei as the decay channels at low excitation energies. We have generalized these models for the case of hyper-matter. In this way we make extension of nuclear reaction studies at low temperature into the strange sector. We demonstrate how the new decay channels can be integrated in the whole disintegration process. Their importance for mass and isotope distributions of produced hyper-fragments is emphasized. New and exotic isotopes obtained within these processes may provide a unique opportunity for investigating hyperon interaction in nuclear matter.
Comments:
32 pages, 13 figures, accepted to Phys. Rev. C
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1611.03359 [pdf]
PRC(2016)·17 citations
04
[Submitted on 10 Nov 2016]
Neutron $-^{19}$ C scattering: emergence of universal properties in a finite range potential
M. A. Shalchi · M.T. Yamashita · M. R. Hadizadeh · T. Frederico · Lauro Tomio
The low-energy properties of the elastic $s -$ wave scattering for the $n -^{19}$ C are studied near the critical condition for the occurrence of an excited Efimov state in $n - n -^{18}$ C. It is established to which extent the universal scaling laws, strictly valid in the zero-range limit, survive when finite range potentials are considered. By fixing the two-neutrons separation energy in $^{20}$ C with available experimental data, it is studied the scaling of the real ( $δ_{0}^{R}$ ) and imaginary parts of the $s -$ wave phase-shift with the variation of the $n -^{18}$ C binding energy. We obtain some universal characteristics given by the pole-position of $k cot (δ_{0}^{R})$ and effective-range parameters. By increasing the $n -^{18}$ C binding energy, it was verified that the excited state of $^{20}$ C goes to a virtual state, resembling the neutron-deuteron behavior in the triton. It is confirmed that the analytical structure of the unitary cut is not affected by the range of the potential or mass asymmetry of the three-body system.
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1611.03381 [pdf]
PLB(2017)·8 citations
05
[Submitted on 10 Nov 2016]
Description of nuclear systems with a self-consistent configuration-mixing approach. II: Application to structure and reactions in even-even sd-shell nuclei
C. Robin🇫🇷 · N. Pillet🇫🇷 · M. Dupuis🇫🇷 · J. Le Bloas🇫🇷 · D. Peña Arteaga🇫🇷 · J.-F. Berger🇫🇷
The variational multiparticle-multihole configuration mixing approach (MPMH) to nuclei has been proposed about a decade ago. While the first applications followed rapidly, the implementation of the full formalism of this method has only been recently completed and applied in [C. Robin, N. Pillet, D. Peña Arteaga and J.-F. Berger, Phys. Rev. C 93, 024302 (2016)] to $^{12}$ C as a test-case. The main objective of the present paper is to carry on the study that was initiated in that reference, in order to put the MPMH method to more stringent tests. To that aim we perform a systematic study of even-even sd-shell nuclei. The wave function of these nuclei is taken as a configuration mixing built on orbitals of the sd-shell, and both the mixing coefficients of the nuclear state and the single-particle wave functions are determined consistently from the same variational principle. The calculations are done using the D1S Gogny force. Various ground-state properties are analyzed. In particular, the correlation content and composition of the wave function as well as the single-particle orbitals and energies are examined. Binding energies and charge radii are also calculated and compared to experiment. The description of the first excited state is also examined and the corresponding transition densities are used as input for the calculation of inelastic electron and proton scattering. Special attention is paid to the effect of the optimization of the single-particle states consistently with the correlations of the system. Globally, the results are satisfying and encouraging. In particular, charge radii and excitation energies are nicely reproduced. However, the chosen valence-space truncation scheme precludes achieving maximum collectivity in the studied nuclei. Further refinement of the method and a better-suited interaction are necessary to remedy this situation.
Comments:
22 pages, 16 figures, accepted in Phys. Rev. C
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1611.03445 [pdf]
PRC(2017)·20 citations
06
[Submitted on 10 Nov 2016] (cross-list from hep-ph)
Heavy Quark Coupled Channel Dynamics from Thermal Shifts
Enrique Ruiz Arriola🇪🇸 · Lorenzo Luis Salcedo🇪🇸 · Eugenio Megias🇪🇸
QCD at finite temperature below the phase transition should be determined in terms of colour singlet states such as hadrons and strings. We show how quark-hadron duality allows extracting sensible information concerning heavy quark and string breaking coupled channel dynamics from Polyakov loop correlators.
Comments:
6 pages, 3 figures. Poster Presented by E.R.A. at XIIth Conference on Quark Confinement and the Hadron Spectrum, August 29th to September 3rd 2016, Thessaloniki, Greece
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
arXiv:
1611.03255 [pdf]
EPJ Web Conf.(2017)·1 citation
07
[Submitted on 10 Nov 2016] (cross-list from hep-ph)
X, Y and Z States
M. Nielsen🇧🇷 · R.M. Albuquerque🇧🇷 · J.M. Dias🇧🇷 · K.P. Khemchandani🇧🇷 · A. Martinez Torres🇧🇷 · F.S. Navarra🇧🇷 · C.M. Zanetti🇧🇷
Many new states in the charmonium mass region were recently discovered by BaBar, Belle, CLEO-c, CDF, D0, BESIII, LHCb and CMS Collaborations. We use the QCD Sum Rule approach to study the possible structure of some of these states.
Comments:
Contribution for the proceedings of the "XII Quark Confinement and the Hadron Spectrum - CONF12" conference
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1611.03300 [pdf]
EPJ Web Conf.(2017)·2 citations
08
[Submitted on 10 Nov 2016] (cross-list from hep-ph)
Exploring universality of transversity in p-p collisions
Marco Radici🇮🇹
The transversity distribution was recently extracted from deep-inelastic scattering processes producing hadron pairs in the final state. Together with a specific chiral-odd di-hadron fragmentation function, it is involved in the elementary mechanism that generates a transverse-spin asymmetry in the azimuthal distribution of the detected hadron pairs. The same elementary mechanism was predicted to generate an analogous asymmetry when the hadron pairs are produced in proton-proton collisions with one transversely polarized proton. Recently, the STAR Collaboration has observed this asymmetry. We analyze the impact of these data on our knowledge of transversity.
Comments:
10 pages, 7 double figures. To appear in the proceedings of the QCD Evolution Workshop 2016, Amsterdam, The Netherlands, May 30 - June 3, 2016
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
1611.03351 [pdf]
PoS(2017)·2 citations

Affiliations

first authorsco-authorsvia INSPIRE