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arXiv 2402.18686nucl-thhep-ph
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通过超子、玻色子暗物质和夸克物质观测中子星方程 of 状态

Observational Probes of the Neutron Star Equation of State with Hyperons, Bosonic Dark Matter, and Quark Matter

University of Wrocław(弗罗茨瓦夫大学);Center for Simulations of Superdense Fluids, University of Wrocław(弗罗茨瓦夫大学超密流体模拟中心);Frankfurt Institute for Advanced Studies(法兰克福高等研究院);Alikhanyan National Science Laboratory (Yerevan Institute of Physics)(阿里哈尼扬国家科学实验室(埃里温物理研究所));Technische Universität Darmstadt(达姆施塔特工业大学);GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI亥姆霍兹重离子研究中心有限公司)

Mahboubeh Shahrbaf, Davood Rafiei Karkevandi, Alexander Ayriyan, Stefan Typel

AI总结:

研究通过混合模型探讨中子星中sexaquark对方程 of 状态的影响,发现其质量在1885-1935 MeV范围内可满足观测约束。

摘要:

背景。由于其对这些物体的结构和可观测性质的潜在影响,中子星中的暗物质日益引起关注。在各种候选者中,假设的sexaquark作为一种可能的玻色子暗物质粒子,可能在中子星核心的极端条件下形成。目标。我们研究了一个包含超子、玻色子暗物质(以sexaquark形式存在)和无限制的夸克物质的混合中子星模型是否能满足所有当前的观测约束。我们特别关注确定与质量半径测量和潮汐变形限制相一致的sexaquark质量范围。方法。我们使用DD2Y-T模型来处理有核相,其中包括超子,并使用非局部Nambu-Jona-Lasinio模型来处理无限制的夸克相。相变被建模为平滑的交叉过程,使用替换插值构造方法。通过有效质量移位表示排斥力引入sexaquark-重子相互作用。我们纳入了完整的当前观测数据集,包括NICER对PSRs J0437-4715的测量和新发布的J0614-3329数据,并进行了贝叶斯分析以约束sexaquark的质量。结果。我们的结果表明,sexaquark的存在使方程 of 状态变软,使混合模型能够满足围绕标准1.4 M_\odot中子星的半径和潮汐变形约束。我们发现具有大约1900 MeV sexaquark质量的混合EOS与所有可用约束一致,包括来自HESS J1731-347和PSR J0952-0607的数据,这些数据代表了迄今为止观测到的最低和最高质量的中子星。贝叶斯分析倾向于sexaquark质量范围为1885-1935 MeV,支持这种奇特粒子在中子星内部的潜在相关性。

英文摘要:

Context. The presence of dark matter in neutron stars is of growing interest due to its potential impact on the structure and observable properties of these objects. Among the various candidates, the hypothetical sexaquark has emerged as a promising bosonic dark matter particle, potentially forming under extreme conditions in neutron star cores. Aims. We investigate whether a hybrid neutron star model that includes hyperons, bosonic dark matter (in the form of sexaquarks), and deconfined quark matter can satisfy all current observational constraints. We particularly focus on identifying the range of sexaquark masses consistent with mass-radius measurements and the tidal deformability limit. Methods. We used the DD2Y-T model for the hadronic phase, which includes hyperons, and a nonlocal Nambu-Jona-Lasinio model for the deconfined quark phase. The phase transition was modeled as a smooth crossover using the replacement interpolation construction method. Sexaquark-baryon interactions were introduced via an effective mass shift representing repulsion. We incorporated the full set of current observational data, including NICER measurements of PSRs J0437-4715 and newly published J0614-3329 data, and performed a Bayesian analysis to constrain the sexaquark mass. Results. Our results show that the presence of the sexaquark softens the equation of state, enabling the hybrid model to satisfy both the radius and tidal deformability constraints around the canonical 1.4 M_\odot neutron stars. We find that hybrid EOSs with a sexaquark mass around 1900 MeV are in agreement with all available constraints, including those from HESS J1731-347 and PSR J0952-0607, which represent the lowest and highest mass neutron stars observed to date. The Bayesian analysis favors a sexaquark mass range of 1885-1935 MeV, supporting the potential relevance of this exotic particle in neutron star interiors.

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