Sexaquark dilemma in neutron stars and its solution by quark deconfinement

被引:25
作者
Shahrbaf, M. [1 ]
Blaschke, D. [1 ,2 ,3 ]
Typel, S. [4 ,5 ]
Farrar, G. R. [6 ]
Alvarez-Castillo, D. E. [2 ,7 ]
机构
[1] Univ Wroclaw, Inst Theoret Phys, PL-50204 Wroclaw, Poland
[2] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia
[3] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia
[4] Tech Univ Darmstadt, Fachbereich Phys, Inst Kernphys, Schlossgartenstr 9, D-64289 Darmstadt, Germany
[5] GSI Helmholtzzentrum Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany
[6] NYU, Ctr Cosmol & Particle Phys, Dept Phys, New York, NY 10003 USA
[7] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
关键词
EQUATION-OF-STATE; 3RD FAMILY; DENSE; MASS; MODELS; MATTER; QCD;
D O I
10.1103/PhysRevD.105.103005
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Following the idea that a stable sexaquark state with quark content (uuddss) would have gone unnoticed by experiments so far and that such a particle would be a good dark matter candidate, we investigate the possible role of a stable sexaquark in the physics of compact stars given the stringent constraints on the equation of state that stem from observations of high mass pulsars and GW170817 bounds on the compactness of intermediate mass stars. We find that there is a "sexaquark dilemma" (analogous to the hyperon dilemma) for which the dissociation of the sexaquark in quark matter is a viable solution fulfilling all present constraints from multimessenger astronomy. The parameters needed to model the hybrid star, including sexaquarks, are in line with parameters of preexisting quark- and hadronic-matter models. We find that current constraints-tidal deformability in accordance with GW170817 and maximum mass above the lower limit from PSR J0740+6620-can be satisfied two ways: with early quark deconfinement such that neither sexaquarks nor hyperons are present in any neutron star interiors, or with later deconfinement such that a neutron-sexaquark shell surrounds the inner quark matter core.
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页数:23
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共 84 条
  • [41] Refined Mass and Geometric Measurements of the High-mass PSR J0740+6620
    Fonseca, E.
    Cromartie, H. T.
    Pennucci, T. T.
    Ray, P. S.
    Kirichenko, A. Yu
    Ransom, S. M.
    Demorest, P. B.
    Stairs, I. H.
    Arzoumanian, Z.
    Guillemot, L.
    Parthasarathy, A.
    Kerr, M.
    Cognard, I
    Baker, P. T.
    Blumer, H.
    Brook, P. R.
    DeCesar, M.
    Dolch, T.
    Dong, F. A.
    Ferrara, E. C.
    Fiore, W.
    Garver-Daniels, N.
    Good, D. C.
    Jennings, R.
    Jones, M. L.
    Kaspi, V. M.
    Lam, M. T.
    Lorimer, D. R.
    Luo, J.
    McEwen, A.
    McKee, J. W.
    McLaughlin, M. A.
    McMann, N.
    Meyers, B. W.
    Naidu, A.
    Ng, C.
    Nice, D. J.
    Pol, N.
    Radovan, H. A.
    Shapiro-Albert, B.
    Tan, C. M.
    Tendulkar, S. P.
    Swiggum, J. K.
    Wahl, H. M.
    Zhu, W. W.
    [J]. ASTROPHYSICAL JOURNAL LETTERS, 2021, 915 (01)
  • [42] Lattice QCD study of the H dibaryon using hexaquark and two-baryon interpolators
    Francis, A.
    Green, J. R.
    Junnarkar, P. M.
    Miao, Ch.
    Rae, T. D.
    Wittig, H.
    [J]. PHYSICAL REVIEW D, 2019, 99 (07)
  • [43] EQUATION OF STATE AT SUPRANUCLEAR DENSITIES AND EXISTENCE OF A THIRD FAMILY OF SUPERDENSE STARS
    GERLACH, UH
    [J]. PHYSICAL REVIEW, 1968, 172 (05): : 1325 - &
  • [44] Glendenning NK, 2000, ASTRON ASTROPHYS, V353, pL9
  • [45] Phase diagram of neutral quark matter in nonlocal chiral quark models
    Gomez Dumm, D.
    Blaschke, D. B.
    Grunfeld, A. G.
    Scoccola, N. N.
    [J]. PHYSICAL REVIEW D, 2006, 73 (11):
  • [46] Green J. R., 2021, PHYS REV LETT, V127
  • [47] Cooling of neutron stars in "nuclear medium cooling scenario" with stiff equation of state including hyperons
    Grigorian, H.
    Voskresensky, D. N.
    Maslov, K. A.
    [J]. NUCLEAR PHYSICS A, 2018, 980 : 105 - 130
  • [48] EQUATION OF STATE AND NEUTRON STAR PROPERTIES CONSTRAINED BY NUCLEAR PHYSICS AND OBSERVATION
    Hebeler, K.
    Lattimer, J. M.
    Pethick, C. J.
    Schwenk, A.
    [J]. ASTROPHYSICAL JOURNAL, 2013, 773 (01)
  • [49] Bound H Dibaryon in Flavor SU(3) Limit of Lattice QCD
    Inoue, Takashi
    Ishii, Noriyoshi
    Aoki, Sinya
    Doi, Takumi
    Hatsuda, Tetsuo
    Ikeda, Yoichi
    Murano, Keiko
    Nemura, Hidekatsu
    Sasaki, Kenji
    [J]. PHYSICAL REVIEW LETTERS, 2011, 106 (16)
  • [50] PERHAPS A STABLE DIHYPERON
    JAFFE, RL
    [J]. PHYSICAL REVIEW LETTERS, 1977, 38 (05) : 195 - 198