arXiv 2404.116422024-04-17hep-phastro-ph.COhep-th

场论轴子多重态（The Field Theory Axiverse）

The Field Theory Axiverse

Stephon Alexander, Tucker Manton, Evan McDonough

AI总结：

本研究针对暗禁闭规范理论中任意味数暗夸克产生的场论轴子多重态，计算其能谱、与标准模型光子的耦合及味数、色数依赖，结合Nf=10、Nc=3的示例给出约束，并阐明伴随的超重暗重子多重态。

摘要：

轴子及类轴子粒子（ALPs）是超出标准模型的物理的重要候选者，可在宇宙学中发挥重要作用，充当暗物质或暗能量，或同时兼具二者，其研究动机部分源自弦理论轴子多重态（string theory axiverse）。类轴子粒子（ALPs）也可作为暗禁闭规范理论中手征对称性破缺后的复合自由度出现，类似于标准模型（SM）中的π介子。具有任意$N_f$味暗夸克的暗区会产生$N_f^2-1$种类轴子态，实际上构成了场论轴子多重态（或称“π-轴子多重态”）。可通过暗光子与SM光子之间的标准动力学混合实现与可见区的连接，这会为暗夸克生成毫电荷，进而在SM与暗π介子之间产生宇称偶和宇称奇的耦合。该场景已针对$N_f=2$的情况开展过研究，近期也针对具有$N_f=6$的暗标准模型进行了探索。在本工作中，我们研究了任意味数下这场论轴子多重态的能谱，并将其应用于$N_f=10$的示例。我们计算了其与SM光子的耦合（类似于传统轴子-光子耦合），包括$N_f$和$N_c$的依赖关系，并计算了$N_f=10$、$N_c=3$的π-轴子多重态的当前及未来约束。我们阐明了伴随出现的超重暗重子的“重子多重态（bary-verse）”，即质量由暗π介子衰变常数决定的带电和中性暗重子的集合。

英文摘要：

Axion and axion-like particles (ALPs) are a prominent candidate for physics beyond the Standard Model, and can play an important role in cosmology, serving as dark matter or dark energy, or both, drawing motivation in part from the string theory axiverse. Axion-like particles (ALPs) can also arise as composite degrees of freedom following chiral symmetry breaking in a dark confining gauge theory, analogous to the Standard Model (SM) pion. A dark sector with arbitrary $N_f$ flavors of dark quarks leads to $N_f^2-1$ axion-like states, effectively a field theory axiverse (or '$π$-axiverse'). A portal to the visible sector can be achieved through the standard kinetic mixing between the dark photon and SM photon, generating millicharges for the dark quarks and consequently couplings, both parity-even and parity-odd, between the SM and the dark pions. This scenario has been studied for the $N_f=2$ case and more recently for a dark Standard Model with $N_f=6$. In this work, we study the spectrum of this field theory axiverse for an arbitrary number of flavors, and apply this to the example $N_f=10$. We calculate the couplings to the SM photon analogous to the conventional axion-photon coupling, including the $N_f$ and $N_c$ dependence, and compute the present and future constraints on the $N_f=10$, $N_c=3$, $π$-axiverse. We elucidate the accompanying 'bary-verse' of superheavy dark baryons, namely an ensemble of charged and neutral dark baryons with a mass set by the dark pion decay constant.

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