论文标题
QCD不确定性对黑暗歼灭的抗蛋白质光谱的影响
Impact of QCD uncertainties on antiproton spectra from dark-matter annihilation
论文作者
论文摘要
歼灭或衰减的深色颗粒可以在产生天体物理时间尺度上稳定的颗粒之前，将经历复杂的过程序列，包括强和电磁辐射，强调和强子腐烂。以这种方式产生的抗抗物子可能会在AMS-02等实验中留下足迹。几个小组报告说，在抗蛋白通量中，刚性范围为$ 10 $ - $ 20 $ GV。但是，巴里昂产生的理论建模并不直接，部分依赖于蒙特卡洛事件发生器中的现象学模型。在这项工作中，我们评估了QCD不确定性对黑暗灭绝的抗植物光谱的影响。作为原则证明，我们表明，对于仅取决于热平均歼灭横截面（$ \langleσv\ rangle $）和深色质量（$ m_B $）的两参数模型（$ \ langleσv\ rangle $），QCD的不确定性会影响最大的质量质量，而不是$ \ sim 14 \％\％\％$ \％（ $m_χ$和歼灭频道（$ b \ bar {b} $或$ w^+ w^ - $）和$ \ langleσv\ rangle $ by $ \ sim 10 \％$。为了进行比较，发现对基础扩散参数的更改被发现在$ 1 \％$ - $ 5 \％$之内，结果也有弹性的宇宙射线传播模型。这些发现表明，QCD不确定性需要包括在未来的DM分析中。为了促进成熟的分析，我们以表格形式提供光谱，包括QCD不确定性和代码片段，以执行质量插值和快速DM拟合。该代码可以在此\ href {https://github.com/ajueid/qcd-dm.github.io.git} {github}存储库中找到。
Dark-matter particles that annihilate or decay can undergo complex sequences of processes, including strong and electromagnetic radiation, hadronisation, and hadron decays, before particles that are stable on astrophysical time scales are produced. Antiprotons produced in this way may leave footprints in experiments such as AMS--02. Several groups have reported an excess of events in the antiproton flux in the rigidity range of $10$--$20$ GV. However, the theoretical modeling of baryon production is not straightforward and relies in part on phenomenological models in Monte Carlo event generators. In this work, we assess the impact of QCD uncertainties on the spectra of antiprotons from dark-matter annihilation. As a proof-of-principle, we show that for a two-parameter model that depends only on the thermally-averaged annihilation cross section ($\langle σv \rangle$) and the dark-matter mass ($M_χ$), QCD uncertainties can affect the best-fit mass by up to $\sim 14 \%$ (with large uncertainties for large DM masses), depending on the choice of $M_χ$ and the annihilation channel ($b\bar{b}$ or $W^+ W^-$), and $\langle σv \rangle$ by up to $\sim 10\%$. For comparison, changes to the underlying diffusion parameters are found to be within $1\%$--$5\%$, and the results are also quite resilient to the choice of cosmic-ray propagation model. These findings indicate that QCD uncertainties need to be included in future DM analyses. To facilitate full-fledged analyses, we provide the spectra in tabulated form including QCD uncertainties and code snippets to perform mass interpolations and quick DM fits. The code can be found in this \href{https://github.com/ajueid/qcd-dm.github.io.git}{github} repository.
