光锥QCD求和规则框架下重奇异轴矢量介子辐射衰变中的混合效应
Mixing effects in radiative decays of heavy-strange axial-vector mesons within light-cone QCD sum rules
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中文总结 AI 辅助
本文在光锥QCD求和规则框架下，考虑重奇异轴矢量介子的¹P₁与³P₁组态混合，计算其辐射衰变宽度，发现衰变宽度与组态混合相关，为相关研究提供理论依据。
中文摘要 AI 辅助
本文在光锥QCD求和规则框架下，考虑$^{1}P_{1}$与$^{3}P_{1}$组态间的混合，计算了$D_{s1}(2460)\to D_s\boldsymbol{\gamma}$、$D_{s1}(2536)\to D_s\boldsymbol{\gamma}$、$B_{s1}(5750)\to B_s\boldsymbol{\gamma}$和$B_{s1}(5830)\to B_s\boldsymbol{\gamma}$的辐射衰变宽度。在底奇异介子区，我们考虑了实验上已确认的$B_{s1}(5830)$以及理论上预期的较低质量$1^+$态$B_{s1}(5750)$。我们得到：$\boldsymbol{\\\\
英文摘要
We calculate the radiative decay widths of $D_{s1}(2460)\to D_sγ$, $D_{s1}(2536)\to D_sγ$, $B_{s1}(5750)\to B_sγ$, and $B_{s1}(5830)\to B_sγ$ within light-cone QCD sum rules, taking into account the mixing between the $^{1}P_{1}$ and $^{3}P_{1}$ configurations. In the bottom-strange sector, we consider the experimentally established $B_{s1}(5830)$ together with the theoretically expected lower $1^+$ state, denoted $B_{s1}(5750)$. We obtain $Γ[D_{s1}(2460)\to D_sγ]=45.9^{+10.1}_{-8.5}$ keV, $Γ[D_{s1}(2536)\to D_sγ]=0.55^{+1.73}_{-0.48}$ keV, $Γ[B_{s1}(5750)\to B_sγ]=12.0^{+2.9}_{-2.3}$ keV, and $Γ[B_{s1}(5830)\to B_sγ]=8.9^{+2.4}_{-2.0}$ keV. The $D_{s1}(2460)\to D_sγ$ decay width is substantially larger than that of $D_{s1}(2536)\to D_sγ$. This difference originates from $^{1}P_{1}$-$^{3}P_{1}$ mixing: the two basis-current contributions interfere constructively for the lower state and destructively for the higher state. In the bottom-strange sector, the two widths are comparable within their uncertainties, although the higher state still exhibits destructive interference. These results show that the radiative decay pattern of strange heavy axial-vector mesons is sensitive to the mixing of the two spin configurations.
