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介质中超子势与夸克物质中超子的起始:处于β平衡的带电Σ粒子与中微子关联

In-medium hyperon potentials and the quarkyonic hyperon onset: charged $Σ$'s in $β$-equilibrium and the neutrino connection

Jaroslaw Nowak

arXiv 2607.09280首次发表:更新:

AI 中文总结

研究通过用介质势修正FKM的IdylliQ模型解决中子星超子难题,受超核数据和中微子诱导的超子FSI约束,得出多个结果,包括修正后的超子起始点、相关条件及对TOV软化、核心奇异度的影响等,还指出dMmax/dUY可区分两种解决方案。

AI 中文摘要

夸克物质在统计上解决了中子星超子难题:中子填充低动量d夸克相空间,将S = -1阈值从μB = MY转变为2MY - MN,并在Fujimoto - Kojo - McLerran(FKM)机制中通过1/NC³抑制残余软化。我们用介质势修正FKM的IdylliQ模型,受超核数据和中微子诱导的超子FSI约束,发现:(i)修正后的起始点,μB^起始 = (2MY - MN) + 2UY - UN,UY权重为2,每10MeV的dn起始/dUY≈0.3nz,杠杆作用翻倍。(ii)自洽中子势以 -2的权重进入,因此保护需要UN(n起始)≤ +96MeV。(iii)对于处于β平衡的轻子,Σ⁻(dds)的起始变为μe≥258MeV + US - UN,在2Msun核心内从未达到:Σ⁻从第一个超子变为被禁止,Σ的顺序反转。(iv)在FKM假设族中,KY≥Kbu的延续使TOV软化在0.05Msun以下,对于实际相互作用的恒星在0.025Msun以下,比强子模型低4 - 8倍。在该族中这是一个上限;一般来说是下限,因为高于Kbu的超子被省略。(v)在校准到Mmax = 2.12Msun的相互作用低密度区域,核心奇异度由(UL(nz), cΛ)控制:当UL(nz) = -28MeV时,一旦超饱和YNN翻转超过几MeV阈值c*Λ,最大质量恒星无超子。预计的SBND + DUNE FSI精度确定了UL(nz),但cΛ起决定性作用,中微子数据对此盲目:有重离子先验时,P(无超子核心) = 0.90,仅先验时为0.89,由先验主导而非测量。最敏锐的可观测量是微分的:dMmax/dUY比平均场模型小一个数量级,可区分这两种解决方案。

英文摘要

Quarkyonic matter resolves the neutron-star hyperon puzzle statistically: neutrons fill low-momentum $d$-quark phase space, shifting the $S=-1$ threshold from $\muB=M_Y$ to $2M_Y-M_N$ and suppressing residual softening by $1/\Nc^3$ in the Fujimoto--Kojo--McLerran (FKM) mechanism. We dress FKM's IdylliQ model with in-medium potentials, constrained by hypernuclear data and neutrino-induced hyperon FSI, and find: (i) the dressed onset, $\muB^{\rm onset}=(2M_Y{-}M_N)+2U_Y-\UN$, carries $U_Y$ at weight 2, with $dn_{\rm onset}/dU_Y\simeq0.3\,\nz$ per $10\MeV$, twice the leverage. (ii) A self-consistent neutron potential enters at weight $-2$, so protection needs $\UN(n_{\rm onset})\lesssim+96\MeV$. (iii) With leptons in $β$ equilibrium, the $Σ^-$ ($dds$) onset becomes $\mue\ge258\MeV+\US-\UN$, never reached inside a $2\,\Msun$ core: $Σ^-$ switches from first hyperon to forbidden and the $Σ$ ordering inverts. (iv) The $\kY\ge\kbu$ continuation gives TOV softening below $0.05\,\Msun$ in the FKM ansatz family and below $0.025\,\Msun$ for the realistic interacting star, $4$--$8$ below hadronic models. In the family this is a ceiling; generally it is a floor, since hyperons above $\kbu$ are omitted. (v) In an interacting low-density sector calibrated to $\Mmax=2.12\,\Msun$, core strangeness is controlled by $(\UL(\nz),c_Λ)$: at $\UL(\nz)=-28\MeV$, the maximum-mass star is hyperon-free once the supra-saturation $YNN$ turn-over exceeds a few-MeV threshold $c^*_Λ$. Projected SBND+DUNE FSI precision pins $\UL(\nz)$ but leaves $c_Λ$ -- to which neutrino data are blind -- decisive: with the heavy-ion prior, $P({\rm hyperon\mbox{-}free\ core})=0.90$, versus $0.89$ from priors alone, prior-dominated rather than measured. The sharpest observable is differential: $d\Mmax/dU_Y$ is an order of magnitude smaller than in mean-field models, discriminating the two resolutions.

Comments9 pages, 6 figures

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