ITP OpenIR  > SCI期刊论文
Xia, Cheng-Jun; Xue, She-Sheng; Xu, Ren-Xin; Zhou, Shan-Gui
Supercritically charged objects and electron-positron pair creation
Source PublicationPHYSICAL REVIEW D
AbstractWe investigate the stability and e(+)e(-) pair creation of supercritically charged superheavy nuclei, udQM nuggets, strangelets, and strangeon nuggets based on the Thomas-Fermi approximation. The model parameters are fixed by reproducing masses and charge properties of these supercritically charged objects reported in earlier publications. It is found that udQM nuggets, strangelets, and strangeon nuggets may be more stable than Fe-56 at the baryon number A. 315, 5 x 10(4), and 1.2 x 10(8), respectively. For those stable against neutron emission, the most massive superheavy element has a baryon number similar to 965, while udQM nuggets, strangelets, and strangeon nuggets need to have baryon numbers larger than 39, 433, and 2.7 x 10(5). The e(+)e(-) pair creation will inevitably start for superheavy nuclei with charge numbers Z >= 177, for udQM nuggets with Z >= 163, for strangelets with Z >= 192, and for strangeon nuggets with Z >= 212. A universal relation Q/R-e = (m(e) - (mu) over tilde (e))/alpha is obtained at a given electron chemical potential (mu) over tilde (e), where Q is the total charge and Re the radius of electron cloud. The maximum number of Q without causing ethorne- pair creation is then fixed by taking (mu) over tilde (e) = -me. For supercritically charged objects with (mu) over tilde (e) < -m(e), the decay rate for ethorne- pair production is estimated based on the Jeffreys-Wentzel-Kramers-Brillouin (JWKB) approximation. It is found that most positrons are emitted at t less than or similar to 10(-15) s, while a long lasting positron emission can be observed for large objects with R greater than or similar to 1000 fm. The emission of positrons and electronpositron annihilation from supercritically charged objects may be partially responsible for the short gamma-ray burst during the merger of binary compact stars, the 511 keV continuum emission, as well as the narrow faint emission lines in x-ray spectra from galaxies and galaxy clusters.
Cooperation Status国际
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
Indexed BySCIE
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Zhejiang Univ, Sch Informat Sci & Engn, Ningbo Inst Technol, Ningbo 315100, Peoples R China
2.Sapienza Univ Rome, ICRANet, I-00185 Rome, Italy
3.Sapienza Univ Rome, Dept Phys, I-00185 Rome, Italy
4.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
5.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
6.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
8.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
9.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Peoples R China
Recommended Citation
GB/T 7714
Xia, Cheng-Jun,Xue, She-Sheng,Xu, Ren-Xin,et al. Supercritically charged objects and electron-positron pair creation[J]. PHYSICAL REVIEW D,2020,101(10):103031.
APA Xia, Cheng-Jun,Xue, She-Sheng,Xu, Ren-Xin,&Zhou, Shan-Gui.(2020).Supercritically charged objects and electron-positron pair creation.PHYSICAL REVIEW D,101(10),103031.
MLA Xia, Cheng-Jun,et al."Supercritically charged objects and electron-positron pair creation".PHYSICAL REVIEW D 101.10(2020):103031.
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