The properties of isospin-asymmetric cold nuclear matter are studied in terms of the relativistic mean-field theory in which, besides the fields of σ, ω, and ρ mesons, and the isovector, Lorentz-scalar field of the δ-meson is also taken into account. The properties of purely nucleonic np matter are studied as a function of the baryon density nB and the asymmetry parameter α, as well as the properties of electrically neutral β-equilibrium npe μ matter as a function of the baryon density nB. For different values of nB and a, such characteristics of np matter as the energy per baryon, the specific energy owing to isospin asymmetry, the effective proton and neutron masses, and the specific binding energy, are determined. It is shown that the energy owing to the asymmetry for a fixed value of α is a monotonically increasing function of the baryon density nB. For npem matter, the effective proton and neutron masses \({M}_{p}^{\left(eff\right)},{M}_{n}^{\left(eff\right)},\) the specific binding energy Ebind, the symmetry energy Esym, the quantitative fraction of protons Yp = np/nB are studied, as well as the average meson fields \(\widetilde{\upsigma },\widetilde{\upomega },\widetilde{\updelta },\) and \(\widetilde{\uprho }\) as functions of the baryon density nB.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
A. W. Steiner, M. Prakash, J. M. Lattimer, et al., Phys. Rep. 411, 325 (2005).
J. M. Lattimer and M. Prakash, Phys. Rep. 442, 109 (2007).
B.-A. Li, P. G. Krastev, D.-H. Wen, et al., Eur. Phys. J. A 55, 117 (2019).
S. Wang, H. Tong, Q. Zhao, et al., Phys. Rev. C, 106, 021305 (2022).
S. Choi, T. Miyatsu, M.-K. Cheoun, et al., Astrophys. J. 909, 156 (2021).
M. Baldo and G. F. Burgio, Prog. Part. Nucl. Phys. 91, 203 (2016).
X. Roca-Maza and N. Paar, Prog. Part. Nucl. Phys. 101, 96 (2018).
B.-A. Li, B.-J. Cai, W.-J. Xie, et al., Universe 7, 182 (2021).
M. C. Miller, F. K .Lamb, A. J. Dittmann, et al., Astrophys. J. Lett. 918, L28 (2021).
B. P. Abbott, R. Abbott, T. D. Abbott, et al., Phys. Rev. Lett. 121, 161101 (2018).
B. P. Abbott, R. Abbott, T. D. Abbott, et al., Phys. Rev. X 9, 011001 (2019).
J. D. Walecka, Ann. Phys. 83, 491 (1974).
B. D. Serot and J. D. Walecka, Adv. in Nucl. Phys. 16, 1 (1986).
B. D. Serot and J.D.Walecka, Int. J. Mod. Phys. E 6, 515 (1997).
J. Boguta and A. R. Bodmer, Nucl. Phys. A 292, 413 (1977).
Y. Sugahara and H.Toki, Nucl. Phys. A 579, 557 (1994).
G. A. Lalazissis, J. Konig, and P. Ring, Phys. Rev. C 55, 540 (1997).
H. Mueller and B. D. Serot, Nucl. Phys. A 606, 508 (1996).
S. Kubis and M. Kutschera, Phys. Lett. B 399, 191 (1997).
B. Liu, V. Greco, V. Baran, et al., Phys. Rev. C 65, 045201 (2002).
V. Greco, M. Colonna, M. Di Toro, et al., Phys. Rev. C 67, 015203 (2003).
T. Gaitanos, M. Colonna, M. Di Toro, et al., Phys. Lett. B 595, 209 (2004).
M. Di Toro, A. Drago, T. Gaitanos, et al., Nucl. Phys. A 775, 102 (2006).
G. B. Alaverdyan, Astrophysics 52, 132 (2009).
G. B. Alaverdyan, Research in Astron. Astrophys. 10, 1255 (2010).
T. Miyatsu, M.-K. Cheoun, C. Ishizuka, et al., Phys. Lett. B 803, 135282 (2020).
T. Miyatsu, M-K. Cheoun, and K.Saito, Astrophys. J. 929, 82 (2022).
N. M. Hugenholtz and L. van Hove, Physica 24, 363 (1958).
P. Czerski, A. De Pace, and A .Molinari, Phys. Rev. C 65, 044317 (2002).
G. B. Alaverdyan, Symmetry 13, 124 (2021).
H.-Y. Kong, Y. X. Jun Xu, L.-W. Chen, et al., Phys. Rev. C 91, 047601 (2015).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Astrofizika, Vol. 67, No. 2, pp. 229-243 (May 2024)
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Alaverdyan, G.B., Alaverdyan, A.G. Isospin-Asymmetric Cold Nuclear Matter in the Relativistic Mean-Field Theory with a Scalar-Isovector Interaction Channel. Astrophysics 67, 215–230 (2024). https://doi.org/10.1007/s10511-024-09829-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10511-024-09829-y