Mark Goodsell, Andreas Ringwald
We review the case for light U(1) gauge bosons in the hidden-sector of heterotic and type II string compactifications, present estimates of the size of their kinetic mixing with the visible-sector hypercharge U(1), and discuss their possibly very interesting phenomenological consequences in particle physics and cosmology.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
继续探索
Extra "hidden" U(1) gauge factors are a generic feature of string theory that is of particular phenomenological interest. They can kinetically mix with the Standard Model photon and are thereby accessible to a wide variety of astrophysical and cosmological observations and laboratory experiments. In this paper we investigate the masses and the kinetic mixing of hidden U(1)s in LARGE volume compactifications of string theory. We find that in these scenarios the hidden photons can be naturally light and that their kinetic mixing with the ordinary electromagnetic photon can be of a size interesti…
We perform a detailed analysis of the phenomenological properties of hidden Abelian gauge bosons with a kinetic mixing with the ordinary photon within type IIB flux compactifications. We study the interplay between moduli stabilisation and the Green-Schwarz mechanism that gives mass to the hidden photon paying particular attention to the role of D-terms. We present two generic classes of explicit Calabi-Yau examples with an isotropic and an anisotropic shape of the extra dimensions showing how the last case turns out to be very promising to make contact with current experiments. In fact, aniso…
Gravitational higher-form symmetries and the origin of hidden symmetries in Kaluza-Klein compactifications
本文证明在具有等距映射和非平凡拓扑时，爱因斯坦-希尔伯特作用量具有非微分同胚的度规变换不变性，并揭示这些类高形式对称性是环面Kaluza-Klein紧致化中隐藏对偶对称性的起源。
The recent PAMELA and ATIC/Fermi/HESS experiments have observed an excess of electrons and positrons, but not anti-protons, in the high energy cosmic rays. To explain this result, we construct a decaying hidden dark matter model in string theory compactification that incorporates the following two ingredients, the hidden dark matter scenario in warped compactification and the phenomenological proposal of hidden light particles that decay to the Standard Model. In this model, on higher dimensional warped branes, various warped Kaluza-Klein particles and the zero-mode of gauge field play roles o…
Gaugino mass in the Heterotic string with Scherk-Schwarz compactification
用Scherk-Schwarz方案紧致化到四维的弱耦合杂合弦中的一般可观测的扇形Gaugino质量（连同引起具有消失的宇宙学常数的超Higgs效应的隐藏的扇形Gaugino凝聚）在树水平上被证明是非零的，是引力子质量的量级，模关于凝聚的大小和Scherk-Schwarz质量参数的合理假设
Non-tachyonic Scherk-Schwarz compactifications, cosmology and moduli stabilization
众所周知，弦论中的Scherk-Schwarz紧化在闭弦谱中有一个快子出现在紧半径的临界值处。在II型弦中，快子可以通过一个适当的orientifold投影来去除，从而产生无快子的紧化。我们提出了明确的例子，这种类型的各种尺寸，包括六维和四维手征的例子，软破超对称性在封闭部门和非BPS配置在开放部门。这些真空是研究各种宇宙学问题的有趣框架。我们讨论四维宇宙学的解决方案和模量稳定触发的非微扰效应，如高吉诺凝聚D膜和通量。
Cosmological Perturbations in Flux Compactifications
具有四维暴胀几何的卡鲁扎-克莱因紧化结合了高维模型的吸引人的想法，并试图将四维早期或晚期宇宙学结合起来。我们分析了这种紧化周围的宇宙学扰动的质谱，包括标量，矢量和张量扇区。标量扰动的谱是本文的一个新结果，而矢量和张量扰动的谱是本文的一个新结果。此外，完整的分析表明，这种紧化的可能的不稳定性仅限于标量部门。矢量和张量扰动的质量平方都是非负的。我们讨论在额外空间中具有非平凡背景通量的形场作为物质自由度。它们在有效四维理论中提供了标量和矢量扰动的来源。我们分析了Freund-Rubin紧化中的扰动。虽然它只能被认为是一个玩具模型，我们期望的结果定性地推广到类似的配置。我们发现，有两种可能的渠道的不稳定性的标量部门的扰动，其稳定性必须解决的任何宇宙模型，包括额外的维度和形式字段。其中一种不稳定性与形式场的扰动有关。
Minimal String Unification and Hidden Sector in Z_8 Orbifold Models
研究了由$Z_8$轨道模型导出的最小超对称标准模型及其隐扇区。我们使用一个目标空间的对偶异常取消，以调查隐藏的部门符合MSSM统一。对于允许的隐藏部门，我们估计的运行规范耦合常数利用阈值校正由于更高的质量模式。从最有希望打破超对称性的机制之一--
This paper discusses the dilaton, Kähler moduli and hidden sector matter chiral superfields of heterotic $M$-theory vacua in which the hidden sector gauge bundle is chosen to be a line bundle with an anomalous U(1) structure group. For simplicity of notation, the theory is compactified on a Calabi-Yau threefold with $h^{1,1}=1$, although all methods and results apply to more general heterotic compactifications. After introducing a non-perturbative $F$-term potential and coupling to supergravity, the canonically normalized scalar and fermion mass eigenstates, evaluated around a fixed supersymme…
F-theory compactifications on Calabi-Yau fivefolds give rise to two-dimensional N=(0,2) supersymmetric field theories coupled to gravity. We explore the dilaton supergravity defined by the moduli sector of such compactifications. The massless moduli spectrum is found by uplifting Type IIB compactifications on Calabi-Yau fourfolds. This spectrum matches expectations from duality with M-theory on the same elliptic fibration. The latter defines an N=2 Supersymmetric Quantum Mechanics related to the 2d (0,2) F-theory supergravity via circle reduction. Using our recent results on the gravitational …
Solitons reduced from Heterotic fivebranes
考虑到低维世界的孤波部分可能起源于弦论的孤波部分，从10维杂化弦论的杂化五膜解中约化出了各种孤波解.这些孤子原则上可以在适当的紧化后出现，{ \it例如}环面紧化
Unorientable supersymmetric compactifications of M-theory
本文讨论II型弦的轨形紧致化，结合自由作用和左移拉蒙德符号翻转，保持最小超对称并提升为M理论在不可定向流形上的紧致化。
We evaluate the low energy gravitational couplings, $F_g$ in the heterotic $E_8\times E_8$ string theory compactified on orbifolds of $K3\times T^2$ by $g'$ which acts as a $\mathbb{Z}_N$ automorphisim on $K3$ together with a $1/N$ shift along $T^2$. The orbifold $g'$ corresponds to the conjugacy classes of the Mathieu group $M_{24}$. The holomorphic piece of $F_g$ is given in terms of a polylogarithim with index $3-2g$ and predicts the Gopakumar-Vafa invariants in the corresponding dual type II Calabi-Yau compactifications. We show that low lying Gopakumar-Vafa invariants for each of these co…
Within the context of the weakly coupled E8 x E8 heterotic string, we study the hidden sector of heterotic standard model compactifications to four-dimensions. Specifically, we present a class of hidden sector vector bundles - composed of the direct sum of line bundles only - that, together with an effective bulk five-brane, renders the heterotic standard model entirely N=1 supersymmetric. Two explicit hidden sectors are constructed and analyzed in this context; one with the gauge group E7 x U(1) arising from a single line bundle and a second with an SO(12) x U(1) x U(1) gauge group constructe…
We study compactifications of the heterotic pure spinor superstring to six and four dimensions focusing on two simple Calabi-Yau orbifolds. We show that the correct spectrum can be reproduced only if, in the twisted sector, there remain exactly 5 and 2 pure spinor components untwisted, respectively. This naturally defines a "small" Hilbert space of untwisted variables. We point out that the cohomology of the reduced differential on this small Hilbert space can be used to describe the states in the untwisted sector, provided certain auxiliary constraints are defined. In dimension six, the misma…
A Note On ADE String Compactifications
我们解决的问题是否所谓的m-不变量的N = 2超维拉索罗代数可以用于合理的四维弦模型的建设。事实证明，其中的一个无限子集是病态的，尽管N = 2超对称，但拉蒙扇形与奈弗-施瓦茨扇形并不同构。因此，这两个性质是独立的，只需要两者都保证一个N = 1的时空超对称弦谱。然而，剩下的529个一致的光谱-其中210个是Gepner模型的镜像和76个真实的orbifolds-显示出精确的镜像对称性，并包含在最近的Gepner模型的orbifolds分类中。
In this paper we study a $2+1$ dimensional system in which fermions are coupled to the self-dual topological vortex in $U(1) \times U(1)$ Chern-Simons theory, where both $U(1)$ gauge symmetries are spontaneously broken. We consider two Abelian Higgs scalars with visible and hidden sectors coupled to a fermionic field through three interaction Lagrangians, where one of them violates the fermion number. Using a fine tuning procedure, we could obtain the number of the fermionic zero modes which is equal to the absolute value of the sum of the vortex numbers in the visible and hidden sectors.
We revisit the stability of the complex structure moduli in the large volume regime of type-IIB flux compactifications. We argue that when the volume is not exponentially large, such as in Kähler uplifted dS vacua, the quantum corrections to the tree-level mass spectrum can induce tachyonic instabilities in this sector. We discuss a Random Matrix Theory model for the classical spectrum of the complex structure fields, and derive a new stability bound involving the compactification volume and the (very large) number of moduli. We also present a new class of vacua for this sector where the mass …
We study the presence of abelian discrete symmetries in globally consistent orientifold compactifications based on rational conformal field theory. We extend previous work [1] by allowing the discrete symmetries to be a linear combination of U(1) gauge factors of the visible as well as the hidden sector. This more general ansatz significantly increases the probability of finding a discrete symmetry in the low energy effective action. Applied to globally consistent MSSM-like Gepner constructions we find multiple models that allow for matter parity or Baryon triality.
Light moduli fields in string compactifications can have interesting implications for particle physics and cosmology. Fifth force bounds impose stringent constraints on the interactions of such moduli with the visible sector. To be consistent with the bounds, they need to be part of hidden sectors which interact with the Standard Model with weaker-than-Planck suppressed interactions. We consider scenarios in which the visible sector degrees of freedom are localised in the compactification and light moduli arise as closed string degrees of freedom associated with hidden sectors which are geomet…
A no-go theorem for string warped compactifications
我们给出了存在微扰杂合和公共扇区II型弦翘曲紧化的必要条件，分别保持4个和8个超对称性到4个时空维度。特别是，我们发现，唯一的紧化的杂化弦的自旋连接嵌入规范连接和II型弦是那些在卡-丘流形上的常数dronon。我们得到类似的结果，紧化到六个和两个层面。
We probe a slice of the massive winding sector of bosonic string theory from toroidal compactifications of Double Field Theory (DFT). This string subsector corresponds to states containing one left and one right moving oscillators. We perform a generalized Kaluza Klein compactification of DFT on generic $2n$-dimensional toroidal constant backgrounds and show that, up to third order in fluctuations, the theory coincides with the corresponding effective theory of the bosonic string compactified on $n$-dimensional toroidal constant backgrounds, obtained from three-point amplitudes. The comparison…
Metastable Vacua in Flux Compactifications and Their Phenomenology
在通量紧致化的背景下，通过将超对称性动态破缺的扇区与负责模量稳定的扇区相结合，获得了具有小的正宇宙学常数的亚稳真空，这被称为F-提升。我们分析了这个过程中的一个模型无关的方式和研究所产生的真空的唯象性质。
Gauss-Bonnet dynamical compactification scenarios and their ghosts in the tensor sectors
本文研究 Einstein-Gauss-Bonnet 理论中的动力学紧致化场景，揭示其背景构型及张量扰动的鬼场不稳定性，发现放宽假设后的新稳定解因违反引力波速度限制而被摒弃，呼吁全面研究该框架下的紧致化、稳定性及物质效应。
Dynamical Stability of Six-dimensional Warped Flux Compactification
我们证明了作者最近发现的具有翘曲通量紧化的六维膜世界解的动力学稳定性。我们考虑在这个背景时空的线性扰动，假设在额外的维度轴对称。微扰扩展的标量，矢量和张量型谐波的四维Minkoswki时空，我们分别分析每种类型。结果发现，在每个扇区中没有不稳定模，只有在张量扇区中有零模，对应于四维引力子。我们还获得了前几个卡鲁扎-克莱因模式在每个部门。
Ultraviolet physics typically induces a kinetic mixing between gauge singlets which is marginal and hence non-decoupling in the infrared. In singlet extensions of the minimal supersymmetric standard model, e.g. the next-to-minimal supersymmetric standard model, this furnishes a well motivated and distinctive portal connecting the visible sector to any hidden sector which contains a singlet chiral superfield. In the presence of singlet kinetic mixing, the hidden sector automatically acquires a light mass scale in the range 0.1 - 100 GeV induced by electroweak symmetry breaking. In theories with…
We study universality of geometric gauge sectors in the string landscape in the context of F-theory compactifications. A finite time construction algorithm is presented for $\frac43 \times 2.96 \times 10^{755}$ F-theory geometries that are connected by a network of topological transitions in a connected moduli space. High probability geometric assumptions uncover universal structures in the ensemble without explicitly constructing it. For example, non-Higgsable clusters of seven-branes with intricate gauge sectors occur with probability above $1-1.01\times 10^{-755}$, and the geometric gauge g…
We study compactifications of type II theories on SU(2) x SU(2) structure manifolds to six, five and four spacetime dimensions. We use the framework of generalized geometry to describe the NS-NS sector of such compactifications and derive the structure of their moduli spaces. We show that in contrast to SU(3) x SU(3) structure compactifications, there is no dynamical SU(2) x SU(2) structure interpolating between an SU(2) structure and an identity structure. Furthermore, we formulate type II compactifications on SU(2) x SU(2) structures in the context of exceptional generalized geometry which m…
We investigate possible renormalization effects on the low-energy mass spectrum of the minimal supersymmetric standard model (MSSM), using a calculable model of strongly coupled hidden sector. We model the hidden sector by N=2 supersymmetric quantum chromodynamics with gauge group SU(2) x U(1) and N_f=2 matter hypermultiplets, perturbed by a Fayet-Iliopoulos term which breaks the supersymmetry down to N=0 on a metastable vacuum. In the hidden sector the Kahler potential is renormalized. Upon identifying a hidden sector modulus with the renormalization scale, and extrapolating to the strongly c…
Hidden Sector Supergravity Breakdown
引力介导的超对称破缺起源于对隐扇区中的高吉诺凝聚的研究。我们回顾了这种超引力分解机制，从八十年代初的原始提法到它在超弦理论和M理论中的自然实现。在后一种情况下，隐藏的和可观察的扇区在几何上分开，超对称性在隐藏的墙上动态地被打破。
A Viable Model of Dynamical Supersymmetry Breaking in the Hidden Sector
我们提出了一个简单而自然的动力学超对称破缺模型，它可以作为引力耦合隐扇区中自发超对称破缺的机制。在可见光区的高吉诺质量自然与夸克、斯莱普顿和引力子质量大小相同。
U(1)_R-mediated supersymmetry breaking from a six-dimensional flux compactification
研究了余维为2的6D手征规范超引力通量紧致化中U（1）R介导的超对称破缺。在四维有效超引力下，考虑了一个具有U（1）R不变性的模型，该模型具有U（1）R不变性，并主要通过非零U（1）R D项确定了可见扇区的软标量质量.我们得到了一个低能超粒子谱，并讨论了所得到的非普适标量软质量对超对称现象如暗物质遗迹丰度的影响。
We study vortex solutions in a theory with dynamics governed by two weakly coupled Abelian Higgs models, describing a hidden sector and a visible sector. We analyze the radial dependence of the axially symmetric solutions constructed numerically and discuss the stability of vortex configurations for different values of the model parameters, studying in detail vortex decay into lower energy configurations. We find that even in a weak coupling regime vortex solutions strongly depend on the parameters of both the visible and hidden sectors. We also discuss on qualitative grounds possible implicat…
We investigate the presence of vortices in generalized Maxwell-Higgs models with a hidden sector. The model engenders $U(1)\times U(1)$ symmetry, in a manner that the sectors are coupled via the visible magnetic permeability depending only on the hidden scalar field. We develop a first order framework in which the hidden sector decouples from the visible one. We illustrate the results with two specific examples, that give rise to the presence of vortices with internal structure.
A solution to the hierarchy problem from an almost decoupled hidden sector within a classically scale invariant theory
如果标度不变性是一种经典对称，那么普朗克标度和弱标度都应该以量子效应的形式出现。我们表明，这可以实现在简单的尺度不变理论与隐藏的部门。弱/普朗克尺度等级出现在（技术上自然的）极限，其中隐藏扇区从普通扇区中分离出来。由于经典的尺度不变性，弱尺度不受二次发散的影响，因此不存在层次问题。
Gauge mediated supersymmetry breaking without exotics in orbifold compactification
我们建议SU（5）$'$在隐藏扇区中朝向一个可能的规范介导的超对称性破缺方案，以消除SUSY味问题，并在$\Z_{12-I}$中构造了一个具有三个族的例子。我们提出的例子有Pati-Salam型分类的粒子在可观察的部门，并没有外来的低能量。我们指出，在SU（5）$'$的10个矢量型$\five'$和$\fiveb'$对中，有6 ~ 7个非常轻的${\bf 5}'$和$\bar{\bf 5}'$对是可以实现的，从而导致了不稳定超对称破缺真空的可能性.不同的压实半径的三个两环朝向实现所需的耦合强度的可能性也被建议。
We investigate the detailed phenomenology of a light Abelian hidden sector in the Randall-Sundrum framework. Relative to other works with light hidden sectors, the main new feature is a tower of hidden Kaluza-Klein vectors that kinetically mix with the Standard Model photon and Z. We investigate the decay properties of the hidden sector fields in some detail, and develop an approach for calculating processes initiated on the ultraviolet brane of a warped space with large injection momentum relative to the infrared scale. Using these results, we determine the detailed bounds on the light warped…
Visible Effects of the Hidden Sector
导致软超对称破缺的算符的重正化通常是从高尺度开始计算的，并且在演化方程中只包括可见的扇区相互作用，而忽略隐藏的扇区相互作用。在这里，我们解释为什么这是正确的，只有最平凡的结构在隐藏的部门，并讨论可能的影响。这项调查是由适形隔离的想法。在这个框架中，隐扇区的近共形动力学重正化是关键。在最初的共形隔离模型中，有必要施加隐藏的扇形对称性来实现隔离形式。我们提出的模型，可以逃避这一要求，并导致无规模或异常介导的边界条件，但必要的结构似乎并不通用。更一般地说，标量质量与高吉诺质量的比值、$μ$项、$Bμ$项、$A$项和引力子质量都可能受到显著影响。
We study the hidden sector effects to the mass renormalization of a simplest gauge-mediated supersymmetry breaking scenario. We point out that possible hidden sector contributions render the soft scalar masses smaller, resulting in drastically different sparticle mass spectrum at low energy. In particular, in the ${\bf 5}+\bar{\bf 5}$ minimal gauge mediated supersymmetry breaking with high messenger scale (that is favored by the gravitino cold dark matter scenario), we show that stau can be the next lightest superparticle for moderate values of hidden sector self coupling. This provides a very…
In models of supersymmetry (SUSY) breaking and mediation, strongly coupled SUSY-breaking sectors can play a significant role in determining the low-energy spectrum of the model. For example, strong dynamics may provide a natural solution to both the SUSY flavor problem and the mu / B mu problem. Recently, it has been suggested that a large class of these models lead to identical boundary conditions at the SUSY breaking scale. These boundary conditions would severely constrain the models' viability. We demonstrate that the boundary conditions are instead sensitive to the details of the hidden s…
Probing Hidden Sector Photons through the Higgs Window
我们研究了一个（轻）隐藏扇区额外光子通过隐藏扇区希格斯玻色子（所谓的隐藏希格斯玻色子）的自发对称性破缺获得质量的可能性。隐藏光子可以通过规范动力学混合项与普通光子混合。隐藏的希格斯粒子可以通过一个可重正化的四次项（有时称为希格斯门）与标准模型希格斯粒子耦合。我们讨论的背景下，激光偏振和光照射，通过墙壁的实验，以及宇宙学，天体物理学和非牛顿力的测量，这种光隐藏希格斯的影响。对于从隐藏的希格斯粒子接收质量的隐藏光子，我们发现在小质量区域中的边界比单独的大质量隐藏扇区光子的边界明显更强。
The strategy for assigning $Z_{4R}$ parity in the string compactification is presented. For the visible sector, an anti-SU(5) (flipped-SU(5)) grand unification (GUT) model with three families is used to reduce the number of representations compared to the number in the minimal supersymmetric standard models (MSSMs). The SO(32) heterotic string is used to allow a large nonabelian gauge group SU($N$), $N\ge 9$, for the hidden sector such that the number of extra U(1) factors is small. A discrete subgroup of the gauge U(1)'s is defined as the $Z_{4R}$ parity. Spontaneous symmetry breaking of anti…
Hidden Supersymmetric Dark Sectors
本文提出超对称在暗物质尺度严格成立的隐藏暗区新范式，利用超对称的预测能力完全计算暗区性质，并以 $\mathcal{N}=1$ 超 Yang–Mills 理论作为概念验证。
Hidden Sector Baryogenesis
我们介绍了一种新的重子生成机制，其中隐藏扇区和$U(1)_{baryon}$之间的混合异常驱动重子不对称性。我们证明，这种机制发生在交叉膜结构的标准模型，并表明它解决了一些理论上的困难，在匹配重子生成的实验界限。我们用一个具体的示例模型来说明。我们还讨论了在LHC可能的信号。
We study well-motivated dark matter candidates arising from weakly-coupled hidden sectors in compactified string/$M$-theory. Imposing generic top-down constraints greatly restricts allowed candidates. By considering the possible mechanisms for achieving the correct dark matter relic density, we compile categories of viable dark matter candidates and annihilation mediators. We consider the case where supersymmetry breaking occurs via moduli stabilisation and is gravitationally mediated to the visible and other hidden sectors, without assuming sequestering of the sector in which supersymmetry is…
Models of secluded dark matter offer a variant on the standard WIMP picture and can modify our expectations for hidden sector phenomenology and detection. In this work we extend a minimal model of secluded dark matter, comprised of a U(1)'-charged dark matter candidate, to include a confining hidden-sector CFT. This provides a technically natural explanation for the hierarchically small mediator-scale, with hidden-sector confinement generating m_{gamma'}>0. Furthermore, the thermal history of the universe can differ markedly from the WIMP picture due to (i) new annihilation channels, (ii) a (p…
We argue that the eta-problem in supergravity inflation cannot be solved without knowledge of the ground state of hidden sectors that are gravitationally coupled to the inflaton. If the hidden sector breaks supersymmetry independently, its fields cannot be stabilized during cosmological evolution of the inflaton. We show that both the subsequent dynamical mixing between sectors as well as the lightest mass of the hidden sector are set by the scale of supersymmetry breaking in the hidden sector. The true cosmological eta-parameter arises from a linear combination of the lightest mode of the hid…
SOFTSUSY is a software designed to solve the RG equations of the MSSM and compute its low energy spectrum. HidSecSOFTSUSY is an extension of the SOFTSUSY package which modifies the beta functions to include contributions from light dynamic fields in the hidden sector.
Modification of Decay Constants of Superstring Axions: Effects of Flux Compactification and Axion Mixing
我们研究降低超弦轴子衰变常数的可能性。在杂种优势的Calabi-Yau紧化中，一个依赖于模型的定域轴子可以出现在一个几乎坍缩的2-圈上。通量的影响可以用来产生轴子衰减常数的翘曲因子抑制。我们还指出，比QCD瞬子势高得多的隐扇区瞬子势具有比QCD轴子更大的有效轴子衰变常数。我们表明，这可以通过引入许多隐藏的扇区夸克，使QCD轴子的衰变常数原来是比弦尺度小得多的转换。
We give a formalism for constructing hidden sector bundles as extensions of sums of line bundles in heterotic $M$-theory. Although this construction is generic, we present it within the context of the specific Schoen threefold that leads to the physically realistic $B-L$ MSSM model. We discuss the embedding of the line bundles, the existence of the extension bundle, and a number of necessary conditions for the resulting bundle to be slope-stable and thus $N=1$ supersymmetric. An explicit example is presented, where two line bundles are embedded into the $SU(3)$ factor of the $E_{6} \times SU(3…
We explore the four dimensional Einstein-Maxwell landscape as a toy model in which we can formulate a sphere compactification stabilized by an electromagnetic field. Replacing the compactification sphere by J spheres, we obtain a simple sector of the (2J+2)-dimensional Einstein-Maxwell landscape. In this toy model, we analyze some properties which are very difficult to uncover in the string theory landscape, including: complete moduli stabilization, stability conditions, and state counting. We also show how to construct anthropic states in this model. A detailed comparison between the main fea…
Low scale gravity mediation with warped extra dimension and collider phenomenology on the hidden sector
我们提出了一个超对称Randall-Sundrum模型中引力介导的超对称破缺（引力介导）的方案。在我们的设置中，可见扇区和隐藏扇区共存于红外（IR）膜上。我们介绍了一个简单的隐扇区的Polonyi模型。由于翘曲度规，IR膜上的有效截止尺度是“向下翘曲”的，因此引力调解发生在低尺度上。因此，引力伴子自然是最轻的超伴子（LSP），隐藏和可见扇区场之间的接触相互作用变得更强。我们解决各种红外截止尺度的现象。特别是，我们调查对撞机现象，涉及一个标量场（Polonyi场）在隐藏的部门的情况下，与IR截止约10 TeV。我们发现了一种可能性，隐藏的部门标量可以产生在大型强子对撞机和国际直线对撞机（ILC）。有趣的是，标量在产生过程中表现得像标准模型的希格斯玻色子，而它的衰变过程则截然不同，一旦产生，它将为我们提供一个非常干净的签名。隐藏扇区可能不再隐藏。
In supersymmetric extensions of the Standard Model, superpartner masses consistent with collider bounds typically introduce significant tuning of the electroweak scale. We show that hidden sector renormalisation can greatly reduce such a tuning if the supersymmetry breaking, or mediating, sector runs through a region of strong coupling not far from the weak scale. In the simplest models, only the tuning due to the gaugino masses is improved, and a weak scale gluino mass in the region of 5 TeV may be obtained with an associated tuning of only one part in ten. In models with more complex couplin…
We study vortex solutions in Abelian Chern-Simons-Higgs theories with visible and hidden sectors. We first consider the case in which the two sectors are connected through a BF-like gauge mixing term with no explicit interaction between the the two scalars. Since first order Bogomolny equations do not exist in this case, we derive the second order field equations. We then proceed to an ${\cal N}=2$ supersymmetric extension including a Higgs portal mixing among the visible and hidden charged scalars. As expected, Bogomolnyi equations do exist in this case and we study their string-like solution…
Four-dimensional compactifications of string theory provide a controlled set of possible gauge representations accounting for BSM particles and dark sector components. In this review, constraints from perturbative Type II string compactifications in the geometric regime are discussed in detail and then compared to results from heterotic string compactifications and non-perturbative/non-geometric corners. As a prominent example, an open string realization of the QCD axion is presented. The status of deriving the associated low-energy effective action in four dimensions is discussed and open ave…
More Visible Effects of the Hidden Sector
人们越来越认识到，隐藏的扇区动力学可能会影响可见扇区（超对称标准模型）中的超对称破缺参数，特别是当动力学很强且超共形时。我们指出，有以前没有在文献中讨论的影响。例如，相对于引力子质量，高更子质量被抑制了。我们讨论了各种调解机制的背景下，他们的影响。讨论的问题包括异常调解与单线态，亩（B亩）的问题，在规范和Gaugino调解，和不同的超粒子，以前没有考虑过的质谱。
We consider the production of asymmetric dark matter during hidden sector baryogenesis. We consider a particular supersymmetric model where the dark matter candidate has a number density approximately equal to the baryon number density, with a mass of the same scale as the $b$, $c$ and $τ$. Both baryon asymmetry and dark matter are created at the same time in this model. We describe collider and direct detection signatures of this model.
Hidden theories coupled to the SM may provide emergent (dark) vectors, that are composites/bound-states of the hidden fields. This is motivated by paradigms emerging from the AdS/CFT correspondence but it is a more general phenomenon. We explore the general setup and find that UV interactions among currents or charged fields give rise to emergent vectors in the IR. We study the general properties of such vectors and argue that they can be generically different from fundamental dark photons that have been studied so far.
We derive type IIB vacua which are very promising to put string theory to experimental test. These are Calabi-Yau compactifications with a 4D fibration over a 2D base. The moduli are fixed in such a way to obtain a very anisotropic configuration where the size of the 2D base is exponentially larger than the size of the 4D fibre. These provide stringy realisations of the supersymmetric large extra dimensions scenario and extensions of the ADD scenario which are characterised by TeV-scale strings and two micron-sized extra dimensions. We also study the phenomenological properties of hidden Abeli…
We show that neutron star binaries can be ideal laboratories to probe hidden sectors with a long range force. In particular, it is possible for gravitational wave detectors such as LIGO and Virgo to resolve the correction of waveforms from ultralight dark gauge bosons coupled to neutron stars. We observe that the interaction of the hidden sector affects both the gravitational wave frequency and amplitude in a way that cannot be fitted by pure gravity.
扫码添加微信好友，提出您的宝贵建议 👇
💡 备注请填写：网站反馈
发表机构由 AI 从论文文本抽取，如发现错误，欢迎反馈修正建议。