Nuclear Theory·nucl-th

Tuesday·November 27, 2018

18 papers—11 primary·7 cross-listed

01
[Submitted on 21 Nov 2018]
From QCD Symmetries to Nuclei and Neutron Stars
Wolfram Weise🇩🇪
Global symmetries and symmetry breaking patterns of QCD with light quarks, in particular chiral symmetry, provide basic guidance not only for low-energy hadron physics but also for nuclear forces and the nuclear many-body problem. Recent developments of Chiral Effective Field Theory applications to nuclear and neutron matter are summarized, with special emphasis on a (non-perturbative) extension using functional renormalisation group methods. Topics include: nuclear thermodynamics, extrapolations to dense baryonic matter and constraints from neutron star observables.
Comments:
24 pages, 13 figures. arXiv admin note: text overlap with arXiv:1610.07568
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1811.09682 [pdf]
IJMPE(2018)·5 citations
02
[Submitted on 25 Nov 2018]
Fission of super-heavy nuclei: Fragment mass distributions and their dependence on excitation energy
N. Carjan · F.A. Ivanyuk · Yu.Ts. Oganessian
The mass and total kinetic energy distributions of the fission fragments in the fission of even-even isotopes of superheavy elements from Hs (Z=108) to Og (Z=118) are estimated using a pre-scission point model. We restrict to nuclei for which spontaneous fission has been experimentally observed. The potential energy surfaces are calculated with Strutinsky's shell correction procedure. The parametrization of the nuclear shapes is based on Cassini ovals. For the just before scission configuration we fix $α$ =0.98, what corresponds to $r_{n ec k} \approx 2$ fm, and take into account another four deformation parameters: $α_{1}, α_{3}, α_{4}, α_{6}$ . The fragment-mass distributions are estimated supposing they are due to thermal fluctuations in the mass asymmetry degree of freedom just before scission. The influence of the excitation energy of the fissioning system on these distributions is studied. The distributions of the total kinetic energy (TKE) of the fragments are also calculated (in the point-charge approximation). In Hs, Ds and Cn isotopes a transition from symmetric to asymmetric fission is predicted with increasing neutron number N (at N $\approx$ 168). Super-symmetric fission ocurs at N $\approx$ 160. When the excitation energy increases from 0 to 30 MeV, the peaks (one or two) of the mass distributions become only slightly wider. The first two moments of the TKE distributions are displayed as a function of the mass number A of the fissioning nucleus. A slow decrease of the average energy and a minimum of the width (at N $\approx$ 162) is found.
Comments:
7 pages, 8 figures, submitted to PRC
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1811.09913 [pdf]
PRC(2019)·22 citations
03
[Submitted on 25 Nov 2018]
Probing cold nuclear matter effects with the productions of isolated- $γ$ and $γ$ +jet in p $+$ Pb collisions at $s_{N N} =$ 8.16 TeV
Guo-Yang Ma🇨🇳 · Wei Dai🇨🇳 · Ben-Wei Zhang🇨🇳
We investigate the cold nuclear matter (CNM) effects on the productions of the isolated prompt photon and $γ +$ jet in proton-lead collisions at $8.16$ TeV under the next-to-leading order (NLO) perturbative quantum chromodynamics calculations with four parametrizations for nuclear parton distribution functions (nPDFs), i.e. DSSZ, EPPS16, nCTEQ15, nIMParton. Our theoretical calculations provide good descriptions of pp baseline in the ATLAS collaboration and make predictions for future experimental results at $p$ + $Pb$ collisions. We calculate the dependence of the nuclear modification factor of isolated prompt photon on transverse momentum $p_{T}^{γ}$ and pseudo-rapidity $η^{γ}$ at very forward and backward rapidity regions, and demonstrate that the forward-to-backward yield asymmetries $Y_{pPb}^{asym}$ as a function of $p_{T}^{γ}$ with different nPDFs parametrizations have diverse behaviors. Furthermore, the nuclear modification factor of isolated- $γ +$ jet $R_{pPb}^{γ Jet}$ as a function of $γ +$ jet's pseudo-rapidity $η_{γ Jet} = \frac{1}{2} (η_{γ} + η_{Jet})$ at different average transverse momentum $p_{T}^{avg} = \frac{1}{2} (p_{T}^{γ} + p_{T}^{Jet})$ has been discussed, which can facilitate a tomography study of CNM effects with precise locations in a rather wide kinematic region by varying the transverse momenta and rapidities of both isolated photon and jet in p+A collisions.
Comments:
8 pages, 12 figures
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1811.09976 [pdf]
CPC(2019)·3 citations
04
[Submitted on 25 Nov 2018]
Lifetime estimations from RHIC Au+Au data
Gábor Kasza🇭🇺 · Tamás Csörgő🇭🇺
We discuss a recently found family of exact and analytic, finite and accelerating, 1+1 dimensional solutions of perfect fluid relativistic hydrodynamics to describe the pseudorapidity densities and longitudinal HBT-radii and to estimate the lifetime parameter and the initial energy density of the expanding fireball in Au+Au collisions at RHIC with $s_{N N} = 130$ GeV and $200$ GeV colliding energies. From these exact solutions of relativistic hydrodynamics, we derive a simple and powerful formula to describe the pseudorapidity density distributions in high energy proton-proton and heavy ion collisions, and derive the scaling of the longitudinal HBT radius parameter as a function of the pseudorapidity density. We improve upon several oversimplifications in Bjorken's famous initial energy density estimate, and apply our results to estimate the initial energy densities of high energy reactions with data-driven pseudorapidity distributions. When compared to similar estimates at the LHC energies, our results indicate a surprising and non-monotonic dependence of the initial energy density on the energy of heavy ion collisions.
Comments:
37 pages, substantially extended and accepted version
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1811.09990 [pdf]
Int.J.Mod.Phys.A(2019)·15 citations
05
[Submitted on 25 Nov 2018]
Topology change and nuclear symmetry energy in compact-star matter
Xiang-Hai Liu🇨🇳 · Yong-Liang Ma🇨🇳 · Mannque Rho🇫🇷
We show that the cusp-like structure in the nuclear symmetry energy, a consequence of topology change, visible in the skyrmion lattice description of dense matter is extremely robust. It is present in the Skyrme model -- with the pion field only -- and is left unscathed by massive degrees of freedom such as the vector mesons $ρ$ and $ω$ and also the scalar meson introduced as a dilaton. It leads to the emergence of parity-doubling at the skyrmion-half-skyrmion transition and impacts on the nuclear symmetry energy "wilderness" landscape, weeding out roughly half of the wilderness. It is shown that a pseudo-conformal sound velocity arises at a precocious density at which the cusp is formed. It is suggested that the topology change, being robust, could impact on the tidal deformability observed in gravity waves
Comments:
An appendix is added to briefly explain the procedure of the numerical calculation
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1811.10012 [pdf]
PRC(2019)·8 citations
06
[Submitted on 26 Nov 2018]
$α$ Clustering slightly above $^{100}$ Sn in the Light of the New Experimental Data on the Superallowed $α$ Decay
Dong Bai🇨🇳 · Zhongzhou Ren🇨🇳
The recently observed $α$ -decay chain $^{108} Xe \to^{104} Te \to^{100} Sn$ [K.~Auranen \emph{et al.}, Phys.\ Rev.\ Lett.\ {\bf121}, 182501 (2018)] could provide valuable information on the $α$ clustering in even-even nuclei slightly above the major shells $Z = 50$ and $N = 50$ . In this work, this $α$ -decay chain is studied theoretically within the framework of the density-dependent cluster model plus the two-potential approach. We calculate the $α$ -decay half-lives of $^{104}$ Te and $^{108}$ Xe and study in detail their dependence on the $Q$ value and the density-profile parameters of the core nucleus. Various physical properties of $^{104}$ Te, the heaviest nucleus with a doubly magic self-conjugate core $+$ $α$ , are calculated, with two different assumptions on the renormalization factor of the double-folding potential, which could be a useful reference for future experimental studies.
Comments:
13 pages, 2 figures; accepted version
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1811.10145 [pdf]
EPJA(2018)·21 citations
07
[Submitted on 26 Nov 2018]
Local meson-baryon coupled-channels potential for the Lambda(1405)
Kenta Miyahara🇯🇵 · Tetsuo Hyodo🇯🇵 · Wolfram Weise🇩🇪
A local coupled-channels Kbar N-pi Sigma-pi Lambda potential is constructed, equivalently reproducing the scattering amplitude in chiral SU(3) dynamics. By analyzing the wave function of the Lambda(1405), we show the Kbar N dominance of the upper pole within the two-pole structure of the Lambda(1405). The resulting potential will be useful for investigating Kbar few-nucleon systems including their coupled channels.
Comments:
4 pages, Proceedings of International Conference on Few-Body Problems in Physics (FB22), Jul. 9-13, 2018, Caen, France
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1811.10150 [pdf]
0 citations
08
[Submitted on 26 Nov 2018]
Sensitivity of nuclear statistical equilibrium to nuclear uncertainties during stellar core collapse
Shun Furusawa
I have systematically investigated the equations of state (EOSs) in nuclear statistical equilibrium under thermodynamic conditions relevant for core collapse of massive stars by varying the bulk properties of nuclear matter, the mass data for neutron-rich nuclei, and the finite-temperature modifications of the nuclear model. It is found that the temperature dependence of the nuclear free energies has a significant impact on the entropy and nuclear composition, which affect the dynamics of core-collapse supernovae. There is a little influence from the bulk properties and the mass data. For all models, common nuclei that are likely to contribute to core-deleptonization are those near $Z \approx 30$ and $N \approx 50$ . A model with a semi-empirical expression for internal degrees of freedom, however, overestimates the number densities of magic nuclei with $N \approx 50$ and $82$ , while a model, in which nuclear shell effects are not considered, underestimates the number densities of heavy nuclei, and especially of the magic nuclei. Other models, which include the temperature dependence of shell effects in the internal degrees of freedom and/or in the nuclear internal free energy, indicate that the difference in population between magic nuclei and non-magic nuclei disappears as the temperature increases. The construction of complete statistical EOS will require further theoretical and experimental studies of medium-mass, neutron-rich nuclei with proton numbers 25-45 and neutron numbers 40-85.
Comments:
28 pages, 11 figures, accepted for publication in Phys. Rev. C
Subjects:
Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR)
arXiv:
1811.10198 [pdf]
PRC(2018)·9 citations
09
[Submitted on 26 Nov 2018]
Coexistence of Anderson-Bogoliubov phonon and quadrupole cluster vibration in neutron star inner crust
Tsenenori Inakura🇯🇵 · Masayuki Matsuo🇯🇵
Background: Low-lying collective excitations of inner crust matter in neutron stars are expected to have impact on observables such as the quasi-periodic oscillation in giant flares and the cooling of inner crust in transient phenomena. Coupling between Anderson-Bogoliubov superfluid phonon (AB phonon) in superfluid neutron gas and collective excitations of nuclear clusters is a key issue. Purpose: We intend to predict the nature of low-lying excitation modes of superfluid inner crust matter with focus on quadrupole excitations around a spherical nuclear cluster. We study how the AB phonon of neutron superfluid and possible quadrupole shape vibration of clusters are affected by the inhomogeneous structure of inner crust matter. Results: The calculated results indicate emergence of both AB phonon and quadrupole shape vibration of the cluster with small mixing between the two collective modes. The quadruple AB phonon is similar to that in uniform superfluid apart from small admixture of the shape vibration of cluster. The excitation energy and the collectivity of the cluster vibration mode shows strong and oscillatory dependence on the neutron chemical potential (the neutron gas density), leading to softening and instability in certain situations. This is caused by the resonance shell effect where unbound but resonant single-particle states of neutrons play a central role. Conclusions: The AB phonon of superfluid neutron gas and the quadrupole shape vibration of nuclear cluster coexist in inner crust. The coupling between the AB phonon and the quadrupole shape vibration is weak. The collectivity of the quadrupole shape vibration is governed by the resonance shell effect, and it suggests that emergence of deformed nuclear clusters is possible at any layer of inner crust.
Comments:
11 pages, 8 figures
Subjects:
Nuclear Theory (nucl-th)
arXiv:
1811.10311 [pdf]
PRC(2019)·9 citations
10
[Submitted on 26 Nov 2018]
Fluctuating shapes of the fireballs in heavy-ion collisions
Boris Tomasik🇸🇰 · Jakub Cimerman🇨🇿 · Renata Kopecna🇩🇪 · Martin Schulc🇨🇿
We argue that energy and momentum deposition from hard partons into quark-gluon plasma induces an important contribution to the final state hadron anisotropies. We also advocate a novel method of Event Shape Sorting which allow to analyse the azimuthal anisotropies of the fireball dynamics in more detail. A use of the method in femtoscopy is demonstrated.
Comments:
contribution to Proceedings of the XXIV Baldin seminar on high energy physics problems (Relativistic Nuclear Physics and Quantum Chromodynamics), Sept. 17-22, 2018, Dubna, Russia, 6 pages
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1811.10349 [pdf]
EPJ Web Conf.(2019)·1 citation
11
[Submitted on 22 Nov 2018]
A geometrical interpretation of the Thomas theorem and the Efimov States
H. Zheng · A. Bonasera
Using a generalized Bohr model and the hyper-spherical formalism for a three-body system, we derive the Thomas theorem assuming a simple interaction depending on the range of the potential. We discuss the conditions for which an unbound two-body system produces a bound three-body system and derive universal energy functions. We apply our model to $^{4}$ He and Triton atoms as well as to the triton nucleus. Using their scattering lengths and effective ranges, we are able to reproduce the two-body or the three-body binding energies with only one parameter fitted. Prediction for excited (Efimov) levels are also given and in particular we demonstrate that for some hyper-angles two equal minima appear which indicate a phase (shape) transition similar to the Landau's theory of phase transition. We suggest that the observed excited levels in two different experiments for the triton nucleus are indeed Efimov levels and there may be more surprises.
Comments:
6 pages, 4 figures
Subjects:
Nuclear Theory (nucl-th); Atomic Physics (physics.atom-ph)
arXiv:
1811.10412 [pdf]
J.Phys.Comm.(2020)·12 citations
12
[Submitted on 23 Nov 2018] (cross-list from hep-ph)
Quarkonium inside Quark-Gluon Plasma: Diffusion, Dissociation, Recombination and Energy Loss
Xiaojun Yao🇺🇸 · Berndt Müller🇺🇸
We consider the quarkonium diffusion, dissociation and recombination inside quark-gluon plasma. We compute scattering amplitudes in potential nonrelativistic QCD for relevant processes. These processes include the gluon absorption/emission at the order $g r$ , inelastic scattering at the order $g^{2} r$ and elastic scattering with medium constituents at the order $g^{2} r^{2}$ . We show these amplitudes satisfy the Ward identity. We also consider one-loop corrections. The dipole interaction between the color singlet and octet is not running at the one-loop level. Interference between the tree-level gluon absorption/emission and its thermal loop corrections cancels the collinear divergence in the $t$ -channel inelastic scattering. The inelastic scattering has no soft divergence because of the finite binding energy of quarkonium. We write out the diffusion, dissociation and recombination terms explicitly for a Boltzmann transport equation and define the dissociation and recombination rates. Furthermore, we calculate the diffusion coefficient of quarkonium. We find our result of diffusion coefficient differs from a previous calculation by two to three orders of magnitude. We explain this and can reproduce the previous result in a certain limit. Finally we discuss two mechanisms of quarkonium energy loss inside quark-gluon plasma.
Comments:
28 pages, 4 figures; added some explanations; added journal information
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1811.09644 [pdf]
PRD(2019)·81 citations
13
[Submitted on 24 Nov 2018] (cross-list from hep-ph)
New Insights on Low Energy $π N$ Scattering Amplitudes: Comprehensive Analyses at $O (p^{3})$ Level
Yu-Fei Wang🇨🇳 · De-Liang Yao🇨🇳 · Han-Qing Zheng🇨🇳
A production representation of partial-wave $S$ matrix is utilized to construct low-energy elastic pion-nucleon scattering amplitudes from cuts and poles on complex Riemann sheets. Among them, the contribution of left-hand cuts is estimated using the $O (p^{3})$ results obtained in covariant baryon chiral perturbation theory within the extended-on-nass-shell scheme. By fitting to data on partial-wave phase shifts, it is indicated that the existences of hidden poles in $S_{11}$ and $P_{11}$ channels, as conjectured in our previous paper~\citep{Wang:2017agd}, are firmly established. Specifically, the pole mass of the $S_{11}$ hidden resonance is determined to be $(895 \pm 81) - (164 \pm 23) i$ MeV, whereas, the virtual pole in the $P_{11}$ channel locates at $(966 \pm 18)$ MeV. It is found that analyses at the $O (p^{3})$ level improves significantly the fit quality, comparing with the previous $O (p^{2})$ one. Quantitative studies with cautious physical discussions are also conducted for the other $S$ - and $P$ -wave channels.
Comments:
38 pages. Published in Chinese Physics C
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1811.09748 [pdf]
CPC(2019)·18 citations
14
[Submitted on 24 Nov 2018] (cross-list from hep-ph)
Comparing a few distributions of transverse momenta in high energy collisions
Qi Wang🇨🇳 · Pei-Pin Yang🇨🇳 · Fu-Hu Liu🇨🇳
Transverse momentum spectra of particles produced in high energy collisions are very important due to their relations to the excitation degree of interacting system. To describe the transverse momentum spectra, one can use more than one probability density functions of transverse momenta, which are simply called the functions or distributions of transverse momenta in some cases. In this paper, a few distributions of transverse momenta in high energy collisions are compared with each other in terms of plots to show some quantitative differences. Meanwhile, in the framework of Tsallis statistics, the distributions of momentum components, transverse momenta, rapidities, and pasudorapidities are obtained according to the analytical and Monte Carlo methods. These analyses are useful to understand carefully different distributions in high energy collisions.
Comments:
11 pages, 7 figures. Results in Physics, Accepted
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
1811.09883 [pdf]
Results Phys.(2019)·6 citations
15
[Submitted on 25 Nov 2018] (cross-list from astro-ph.HE)
Surface tension of hot and dense quark matter under strong magnetic fields
G. Lugones🇧🇷 · A. G. Grunfeld🇦🇷
We study the surface tension of hot, highly magnetized three flavor quark matter droplets, focusing specifically on the thermodynamic conditions prevailing in neutron stars, hot lepton rich protoneutron stars and neutron star mergers. We explore the role of temperature, baryon number density, trapped neutrinos, droplet size and magnetic fields within the multiple reflection expansion formalism (MRE), assuming that astrophysical quark matter can be described as a mixture of free Fermi gases composed by quarks $u$ , $d$ , $s$ , electrons and neutrinos, in chemical equilibrium under weak interactions. We find that the total surface tension is rather unaffected by the size of the drop, but is quite sensitive to the effect of baryon number density, temperature, trapped neutrinos and magnetic fields (specially above $e B \sim 5 \times 1 0^{- 3} GeV^{2}$ ). Surface tensions parallel and transverse to the magnetic field span values up to $\sim$ 25 MeV/fm $^{2}$ . For $T ≲ 100$ MeV the surface tension is a decreasing function of temperature but above 100 MeV it increases monotonically with $T$ . Finally, we discuss some astrophysical consequences of our results.
Comments:
8 pages, 6 figures
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
1811.09954 [pdf]
PRC(2019)·38 citations
16
[Submitted on 25 Nov 2018] (cross-list from hep-ph)
Spin-isospin correlated configurations in complex nuclei and neutron skin effect in W $^{\pm}$ production in high-energy proton-lead collisions
Massimiliano Alvioli🇮🇹 · Mark Strikman🇺🇸
We extend our Monte Carlo generator of global configurations in nuclei to include different spatial distributions of protons and neutrons in heavy nuclei taking into account the difference of spatial correlations between two protons, two neutrons and proton-neutron pairs. These configurations are used for building an event generator for proton-heavy nucleus collisions at the LHC for final states with a hard interaction in the channels where cross section for p-p and p-n scattering differ. Soft interactions are taken into account in the color fluctuation extension of the Glauber algorithm taking into account the inherently different transverse geometry of soft and hard p-N collisions. We use the new event generator to test an interesting observation of Physics Letters B745 (2015) 73-78, that the ratio of W $^{+}$ /W $^{-}$ production rates in p-Pb collisions should significantly deviate from the inclusive value for peripheral collisions due to the presence of a neutron skin. We qualitatively confirm expectation of Physics Letters B745 (2015) 73-78, though for a realistic centrality trigger, we find the effect to be a factor of two smaller than the original estimate.
Comments:
27 pages, 11 figures. This version was accepted for publication by Physical Review C, 5 August 2019. Additional files and information at http://sites.psu.edu/color
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
arXiv:
1811.10078 [pdf]
PRC(2019)·21 citations
17
[Submitted on 26 Nov 2018] (cross-list from hep-ph)
The $D ˉ^{*} D ˉ^{*} Σ_{c}$ Three-Body System
Manuel Pavon Valderrama🇨🇳
In the molecular picture the hidden-charm, pentaquark-like $P_{c} (4450)$ resonance is a $D ˉ^{*} Σ_{c}$ bound state with quantum numbers $I = \frac{1}{2}$ and $J^{P} = \frac{3}{2}^{-}$ . If this happens to be the case, it will be natural to expect the existence of $D ˉ^{*} D ˉ^{*} Σ_{c}$ three-body bound states. The most probable quantum numbers for a bound $D ˉ^{*} D ˉ^{*} Σ_{c}$ trimer are the isoscalar $J^{P} = \frac{1}{2}^{+}$ , $\frac{5}{2}^{+}$ and the isovector $J^{P} = \frac{3}{2}^{+}$ , $\frac{5}{2}^{+}$ configurations. Calculations within a contact-range theory indicate a trimer binding energy $B_{3} \sim 3 - 5 MeV$ and $14 - 16 MeV$ for the isoscalar $\frac{1}{2}^{+}$ and $\frac{5}{2}^{+}$ states and $B_{3} \sim 1 - 3 MeV$ and $3 - 5 MeV$ for the isovector $\frac{3}{2}^{+}$ and $\frac{5}{2}^{+}$ states, respectively, with $B_{3}$ relative to the $D ˉ^{*} P_{c} (4450)$ threshold. These predictions are affected by a series of error sources that we discuss in detail.
Comments:
8 pages, 1 figure, extended discussion on regulator dependence, corresponds to published version
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
arXiv:
1811.10173 [pdf]
PRD(2019)·5 citations
18
[Submitted on 26 Nov 2018] (cross-list from hep-ph)
Regularization issues for a cold and dense quark matter model in $β -$ equilibrium
Dyana C. Duarte🇧🇷 · Ricardo L.S. Farias🇧🇷 · Rudnei O. Ramos🇧🇷
A regularization scheme that explicitly separates vacuum contributions from medium effects is applied to a Nambu--Jona-Lasinio model with diquark interactions and in $β -$ equilibrium. We perform a comparison of this proposed scheme with the more traditional one, where no separation of vacuum and medium effects is done. Our results point to both qualitative and quantitative important differences between these two methods, in special regarding the phase structure of the model in the cold and dense nuclear matter case.
Comments:
14 pages, 6 figures, replaced with updated version matching the published one
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
arXiv:
1811.10598 [pdf]
PRD(2019)·19 citations

Affiliations

first authorsco-authorsvia INSPIRE