Oleg Andreev
We use gauge/string duality to estimate the Debye screening mass at non-zero temperature and baryon chemical potential. We interpret this mass as the smallest one in the open string channel. Comparisons are made with the results from holography and lattice QCD.
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We study correlation functions of spatially separated static quark-antiquark pairs in (2+1)-flavor QCD in order to investigate onset and nature of color screening at high temperatures. We perform lattice calculations in a wide temperature range, $140 \le T \le 5814\,{\rm MeV}$, using the highly improved staggered quark action and several lattice spacings to control discretization effects. By comparing at high temperatures our lattice results to weak-coupling calculations as well as to the zero temperature result for the energy of a static quark-antiquark pair, we observe that color screening s…
We compute---at finite quark chemical potentials---the color screening of cold quark matter at the one-loop level, comparing the normal, BCS-paired U(1)em (or Higgs) phase and a singlet phase with color-singlet condensate near the Fermi surface. The latter phase is computed using the example of two-color QCD with a color-singlet diquark condensate. In contrast to the normal and Higgs phases, neither electric nor magnetic screening masses appear in the singlet phase. The absence of a magnetic mass, within a perturbative framework, is a consequence of the proper treatment of gauge invariance. Wh…
We review lattice studies of the color screening in the quark-gluon plasma. We put the phenomena related to the color screening into the context of similar aspects of other physical systems (electromagnetic plasma or cold nuclear matter). We discuss the onset of the color screening and its signature and significance in the QCD transition region, and elucidate at which temperature and to which extent the weak-coupling picture based on hard thermal loop expansion, potential nonrelativistic QCD, or dimensionally-reduced QCD quantitatively captures the key properties of the color screening. We dis…
Colorelectric and Colormagnetic structure of the flux tubes, connecting heavy quark and antiquark, is investigated in the framework of the Field Correlator method which describes all resulting fields in terms of correlators $D^E$ and $D^E_1$. The latter have been computed via gluelumps, which allows to predict the resulting distribution of color fields $\mathbf{E} (\mathbf{r}),$ and colormagnetic currents $\mathbf{k} (\mathbf{r})$ in the flux tubes. It is shown, that at large distances $r\gg λ\approx 0.2$ fm the whole structure of fields and relations between them is similar to that of the dua…
Color Screening Effects on Hadronization in Relativistic Heavy Ion Collisions
在相对论重离子对撞机上研究了色屏蔽对部分子等离子体强子化为强子气体的影响。它被发现有阻止强子化的倾向，因此延迟了部分子到强子气体的转化。由于持续的膨胀，当包含屏蔽时，所得到的强子气体数密度较低。这应该可以将强子噪音还原为真正的夸克-胶子等离子体信号。在这个意义上，彩色筛选是有利的，应该包括在数值模型。在任何情况下，我们主张数值模型应该允许约束力和颜色屏蔽相互作用，以便以自然的方式进行相变。强子化也被证明会严重破坏部分子平衡，这也是为什么不应该期望完全部分子化学平衡的另一个原因。
The d* dibaryon in the extended quark-delocalization, color-screening model
通过包含一π交换（OPE）尾来扩展的夸克离域、色屏蔽模型被应用于氘核和d* 二重子的研究。结果表明，氘核（扩展对象）的性质得到了很好的再现，大大提高了与实验数据的一致性相比，我们以前的研究（没有OPE）。与此同时，d*（一个紧凑的物体）的质量和衰变宽度，正如预期的那样，没有显着改变。
Color Screening by Pions
利用格点量子色动力学计算了有限密度π ^+存在时静态夸克与反夸克之间的相互作用势。多个π ^+的关联函数与威尔逊回路展开因子一起使用，以确定自由空间中的Q \overline{Q}势与存在π凝聚时的Q势之间的差异。发现对势的修改对Q \overline{Q}分离在本工作中探索的范围r < 1 fm上具有显著的依赖性。我们的结果是一致的π介子凝聚作为（非线性）色电介质的行为。
Color Screening and Quark-Quark Interactions in Finite Temperature QCD
我们分析了2味QCD中静态双夸克源的筛选，并将结果与静态夸克-反夸克对的筛选进行了比较。我们表明，在一个固定的颜色表示的两个夸克系统被屏蔽在短距离像一个单一的夸克源在相同的颜色表示，而在大距离的两个夸克被独立屏蔽。在高温下，我们观察到，在双夸克和夸克-反夸克系统的相互作用的相对强度，分别服从卡西米尔标度。我们利用这个结果来研究QCD高温相中重夸克-夸克束缚态的可能存在。我们发现支持$bb$状态的存在高达约$2T_c$，而$cc$状态不太可能形成以上$T_c$。
Quantum color screening in external magnetic field
本文在圈重求和框架下不限制磁场强度地计算了热化磁化QCD物质的色屏蔽质量，发现重离子碰撞产生的极强磁场相对火球高温仍可作微扰处理。
Screening masses in neutral two-flavor color superconductor
本文计算了中性和β平衡稠密双味夸克物质中胶子和光子的德拜和迈斯纳屏蔽质量。结果以一般形式呈现，可用于带隙以及无隙彩色超导相。磁屏蔽质量的结果表明，该系统发展的色磁不稳定性。的不稳定性的可能后果进行了讨论。
Debye screening and Meissner effect in a three-flavor color superconductor
本文计算了具有三种无质量夸克的色超导体中的胶子自能，其中库珀对的凝聚打破了QCD的色味SU（3）_c × U（3）_v × U（3）_A对称性，使之变为对角子群SU（3）_{c+V}。在零温度下，所有八个电胶子获得德拜屏蔽质量，所有八个磁胶子获得迈斯纳质量。德拜以及迈斯纳质量被发现是相同的不同的胶子颜色。这些质量决定了低能自由度的有效理论中的动力学项的系数。他们的价值观与儿子和Stephanov获得的。
Debye screening and Meissner effect in a two-flavor color superconductor
本文计算了具有两种无质量夸克的色超导体中的胶子自能，其中库珀对的凝聚使SU（3）_c断裂为SU（2）_c。在零温下，对于SU（2）c子群中的三个胶子，既不存在德拜屏蔽，也不存在迈斯纳效应。剩下的五个胶子既有电质量又有磁质量。当温度接近色超导开始的临界温度时，或者当胶子动量远大于色-超导能隙时，自能呈现标准硬稠密环近似给出的形式。胶子自能决定凝聚场有效低能理论中动力学项的系数。
We use the gauge/gravity correspondence to study the screening of a heavy quark-antiquark pair in various strongly coupled plasmas. Besides N=4 super Yang-Mills theory and the corresponding AdS_5 space we also study theories obtained as deformations of AdS_5, among them in particular a class of deformations solving supergravity equations of motion. We consider the dependence of the screening distance on the velocity and the orientation of the pair in the plasma. The value of the screening distance in N=4 SYM is found to be a minimum in the class of theories under consideration for all kinemati…
Effect of Color Screening on Heavy Quarkonia Regge Trajectories
使用一个未淬火的晶格势来计算的bottomonium系统的频谱，我们证明了数字对创建的效果是产生终止强子Regge轨迹，在对比Veneziano模型和绝大多数的唯象概括。Regge轨迹的终止可能具有重要的实验后果。
The d' dibaryon in the quark-delocalization, color-screening model
在夸克离域色屏蔽模型（QDCSM）下研究了提出的$d' (IJ^P=00^-)$重子的存在性和质量问题。物理基和对称基之间的变换被推广到SU（2）轨道对称性以外的情形。利用由重子性质和$NN$散射确定的参数，我们发现在$IJ^P=00^-$通道中存在一个温和的吸引，但它并不强到足以形成$d'$态的深度束缚态.（同位旋）I=2 N $Δ$构型也没有深度束缚态。这些结果表明，如果窄的双重子$d'$态确实存在，那么它一定具有更复杂的结构。
Mixing and Screening of Photons and Gluons in a Color Superconductor
本文计算了自旋为1的色超导体在极性相和色自旋锁定相以及自旋为0的色超导体在2SC相和色味锁定相的光子和胶子的德拜质量和迈斯纳质量。利用QCD配分函数给出了光子-胶子混合的一般推导。我们定性和定量的规范玻色子达到质量通过安德森-希格斯机制。与自旋零相相反，两个自旋一相都表现出电磁迈斯纳效应。
Color screening versus thermal decay as the mechanism of $Υ$ suppression in high energy nuclear collisions
该研究针对RHIC能量下Υ粒子压低机制，通过求解输运方程、对比核修正因子与实验数据，证实热衰变诱导的持续压低而非颜色屏蔽主导重离子碰撞中夸克偶素的压低。
Role of the gluons in the color screening in a QCD plasma
在QCD等离子体中的颜色屏蔽，这是研究在一个配方，使明显的相似性和差异的情况下，继续考虑到真正的胶子的贡献。结果，其中包括以前没有执行的数值分析，显示阻尼的关联函数，如果不是指数，并没有很大的不同，从该形式。温度的作用，影响人口和动力学的夸克胶子系统，被发现是相关的。
Color Screening Melts Quarkonium
本文采用基于全QCD格点计算静态夸克-反夸克对自由能的势模型，计算了夸克-胶子等离子体中的夸克偶素谱函数。我们估计了不同夸克偶素态的结合能和热宽度。的解离温度的估计上限是相当低的比在最近的文献中所建议的。
Possible effects of color screening and large string tension in heavy quarkonium spectrum
色屏限制势的可能影响进行了研究。通过对$c\bar c$和$b\bar b$谱的研究，提出了具有大弦张力$T=(0.26-0.32)GeV^2$的色屏蔽线性势. $ψ(4160)$和$ψ(4415)$分别被指定为$ψ(4S)$主导和$ψ(5S)$ $c\bar c$状态。计算了$c\bar c$和$b\bar b$态的质量和轻子宽度（经QCD辐射修正）。
We have studied the thermal stability of Quarkonia states by computing the effects of color-screening and vacuum screening based on a temperature dependent screened coulomb plus power potential for the quark-antiquark interaction. Medium effects on the properties of charmonia and bottomonia states are studied. The color screening and the vacuum screening effects on the stability of the quarkonia states are also separately calculated for comparison.
We show that a growth of the proton-proton total cross section with energy can be entirely attributed to the purely perturbative mechanism. The infrared regularization at rather short distances, $R_c\simeq 0.3$ fm, allows to extend the BFKL technique from deep inelastic to hadron-hadron scattering. With the account of the absorption corrections our results are in agreement with the LHC data on $σ_{tot}^{pp}$.
The $ND$ and $NB$ systems with $I=0$ and $1$, $J^{P}=\frac{1}{2}^{\pm}$, $\frac{3}{2}^{\pm}$, and $\frac{5}{2}^{\pm}$ are investigated within the framework of quark delocalization color screening model. The results show that all the positive parity states are unbound. By coupling to the $ND^{*}$ channel, the state $ND$ with $I=0,~J^{P}=\frac{1}{2}^{-}$ can form a bound state, which can be invoked to explain the observed $Σ(2800)$ state. The mass of the $ND^{*}$ with $I=0,~J^{P}=\frac{3}{2}^{-}$ is close to that of the reported $Λ_{c}(2940)^{+}$, which indicates that $Λ_{c}(2940)^{+}$ can be ex…
The spatial string tension and its effects on screening correlators in a thermal QCD plasma
本文计算了2+1味和淬火QCD在宽温度范围内的空间Wilson线关联子，通过连续极限外推证明软胶子在高温下存在非微扰相互作用，并首次揭示了非微扰赝势对介子屏蔽质量的影响。
We present a model to explain the bottomonium suppression in Pb+Pb collisions at mid rapidity obtained from Large Hadron Collider (LHC) energy, $\sqrt{s_{NN}}=2.76$ TeV. The model consists of two decoupled mechanisms namely, color screening during bottomonium production followed by gluon induced dissociation along with collisional damping. The quasi-particle model (QPM) is used as equation of state (EOS) for the Quark-Gluon Plasma (QGP) medium. The feed-down from higher $Υ$ states, such as $Υ(1P)$, $Υ(2S)$ and $Υ(2P)$, dilated formation times for bottomonium states and viscous effect of QGP me…
ADJOINT "QUARK" COLOR FIELDS IN FOUR-DIMENSIONAL LATTICE GAUGE THEORY: VACUUM SCREENING AND PENETRATION
本文在四维格点理论的标度区中分析了SU（2）色伴随表象中的“夸克”产生的场。伴随夸克的真空屏蔽的证据是从夸克-反夸克（$Q \bar Q$）通量管的伴随（"同位旋“$j=1$）和基本（$j=1/2$）表示的夸克的比较中获得的。计算了色电场强度在平行于$Q \bar Q$轴的方向上的分量${\cal E}_j$。在夸克附近，场的比值${\cal E}_{j=1} / {\cal E}_{j=1/2}$接近8/3，等于SU（2）Casimirs的比值。在大的$R$中，夸克之间的比率远低于8/3。${\cal E}_j$也作为垂直于$Q \bar Q$轴的距离$x_\perp$的函数迅速下降。然而，比率${\cal E}_{j=1} / {\cal E}_{j=1/2}$非常弱地依赖于$x_\perp$。因此，这两种表示法中的磁通管似乎具有非常相似的横截面。这个结果可能意味着QCD真空与I型超导体是对偶的。
Based on the constituent quasiparticle model of quark-gluon plasma (QGP), the matrix elements of the density operator and the Wigner function in the color phase space are presented in form of color path integrals over Wiener and SU(3) group Haar measures. Monte Carlo calculations of quark and gluon momentum distributions and spatial pair distribution functions have been carried out for the strongly coupled QGP plasma in thermal equilibrium at zero baryon chemical potential. The Debye screening mass and the running coupling constant have been obtained from the spatial pair distribution function…
Possibility of generating the $^3_{Λ_c}$H in the quark-delocalization color-screening model
该研究基于QDCSM构建高斯型$NΛ_c$势，并用高斯展开法求解$NNΛ_c$三体方程，表明在特定色屏蔽参数下$^3_{Λ_c}$H的两个自旋态可形成束缚态。
Inspired by the detection of $T_{cc}$ tetraquark state by LHCb Collaboration, we preform a systemical investigation of the low-lying doubly heavy charm tetraquark states with strangeness in the quark delocalization color screening model in the present work. Two kinds of configurations, the meson-meson configuration and diquark-antidiquark configuration, are considered in the calculation. Our estimations indicate that the coupled channel effects play important role in the multiquark system, and a bound state with $J^{P}=1^{+}$ and a resonance state with $J^{P}=0^{+}$ have been predicted. The ma…
Color Screening and the Suppression of the Charmonium State Yield in Nuclear Reactions
我们讨论了在CERN-SPS（NA 50合作）450 GeV的pA碰撞中产生$ψ'$介子的新数据[1]。我们从欧洲核子研究中心的数据$σ(ψ' N)\approx 8$ MB提取的假设下，$ψ'$产生的时空演化的一个点一样的$c\bar c$对扩展随时间的粲偶素状态的完整大小。在分析中，我们假定强子的颜色分布与它与核子相互作用的截面之间存在着某种关系。然而，我们的结果是相当敏感的波包的扩展模式和显着较大的值$σ(ψ' N)$不排除的数据。我们发现，最近的CERN数据证实了[2]的建议，即粲-核子相互作用强度的颜色波动是抑制$J/ψ$产额的主要来源，正如在CERN在pA和AA碰撞中所观察到的那样。
We present results for the (color)magnetic and (color)electric screening masses of the Quark-Gluon Plasma in the presence of an external magnetic field. The screening masses are extracted from the correlators of Polyakov loops, determined by lattice QCD simulations at the physical point. We explore temperatures in the range $200\,\mathrm{MeV}\lesssim T\lesssim 330\,\mathrm{MeV}$ and magnetic field intensities up to $|e|B \sim 1.3\,\mathrm{GeV}^2$. We find that both screening masses are increasing functions of the magnetic field and that the dependence on $B$ becomes weaker for larger temperatu…
In this paper we study the interactions among a static quark-antiquark pair in the presence of dense two-color quark matter with lattice simulation. To this end we compute Polyakov line correlation functions and determine the renormalized color averaged, color singlet and color triplet grand potentials. The color singlet grand potential allows us to elucidate the number of quarks induced by a static quark antiquark source, as well as the internal energy of such a pair in dense quark matter. We furthermore determine the screening length, which in the confinement phase is synonymous with the str…
We perform a systemical investigation of the low-lying doubly-heavy dibaryon systems with strange $S=0$, isospin $I=0$, $1$, $2$ and the angular momentum $J=0$, $1$, $2$, $3$ in the quark delocalization color screening model. We find the effect of channel-coupling cannot be neglected in the study of the multi-quark systems. Due to the heavy flavor symmetry, the results of the doubly-charm and doubly-bottom dibaryon systems are similar with each other. Both of them have three bound states, the quantum numbers of which are $IJ=00$, $IJ=02$ and $IJ=13$, respectively. The energies are $4554$ MeV, …
Color superconductivity, BPS strings and monopole confinement in N=2 and N=4 super Yang-Mills theories
本文综述了变形N=2和N=4的超Yang-Mills理论的BPS弦解和Higgs或（色）超导相的量子禁闭的最新进展。特别是，双磁通量示出总是整数线性组合的字符串通量。此外，得到了弦断裂阈值长度的界。当规范群SU（N）破缺为Z_N时，BPS弦张力满足Casimir标度律。此外，在SU（3）情形下，弦解允许形成一个有三个单极子的封闭系统。
The suppression of heavy quarkonia e.g. $J/ψ$, $Υ$ etc. is considered as a suitable probe to identify the nature of the matter created in heavy ion collisions. Recently we have presented a modified colour screening model for $J/ψ$ suppression in the quark gluon plasma (QGP) using quasiparticle model as the equation of state. In this paper, we extend our model to calculate the anomalous suppression of various states of $Υ$ arising due to QGP medium alone. We obtain the suppression patterns of different bottomonia states with respect to centrality at various available collision energies and comp…
Properties of Color-Coulomb String Tension
本文用SU（3）格点模拟方法研究了库仑规范中胶子传播子的瞬时部分所得到的色库仑弦张力的性质。在禁闭阶段，色库仑弦张力对QCD耦合常数的依赖性小于威尔逊圈弦张力对QCD耦合常数的依赖性。另一方面，在退禁闭阶段，色库仑弦张力并没有消失，即使对于$T/T_c = 1 \sim 5$，它的温度依赖性是可比的磁标度，占主导地位的高温QCD。因此，色库仑弦张力不是QGP相变的序参量。
A feasible mechanism of unitarization of amplitudes of deep inelastic scattering at small values of Bjorken $x$ is the gluon fusion. However, its efficiency depends crucially on the vacuum color screening effect which accompanies the multiplication and the diffusion of BFKL gluons from small to large distances. From the fits to lattice data on field strength correlators the propagation length of perturbative gluons is $R_c\simeq 0.2-0.3$ fermi. The probability to find a perturbative gluon with short propagation length at large distances is suppressed exponentially. It changes the pattern of (d…
SO(10) Cosmic Strings and SU(3) Color Cheshire Charge
某些出现在大统一模型中的宇宙弦，如$SO(10)$，可以携带一种磁通量，这种磁通量对携带$SU(3)_{color}$量子数的物体产生非平凡的作用。我们表明，这样的字符串是非阿贝尔爱丽丝字符串携带nonlocalizable彩色"柴郡”收费。我们研究了文献中提出的$SO(10)$弦可以具有长程拓扑Aharonov-Bohm相互作用，将夸克转变为轻子的主张，并观察到这样的过程是不可能的。我们还讨论了通量通量散射使用多片形式主义。
We modify the McLerran-Venugopalan model to include only a finite number of sources of color charge. We argue that Coulombic interactions between these color charges generates a source-source correlation function that properly includes the effects of color charge screening, a generalization of Debye screening for the Color Glass Condensate. Such a model may be useful for computing angular harmonics of flow measured in high energy hadron collisions for small systems. In this paper we provide a basic formulation of the problem on a lattice.
Debye screening in the hot non-Abelian plasma
在QCD的退禁闭阶段，非微扰地计算了德拜质量mD，其中已知存在色磁禁闭。后者定义m_D为m_D=c_D \sqrt{σ_s}，其中c_D \approx 2，σ_s=σ_s（T）为空间弦张力。计算得到的mD（T）的大小和温度依赖性与晶格计算结果符合得很好.
QCD perturbation theory ignores the compact nature of $SU(3)$ gauge group that gives rise to the periodic $θ$-vacuum of the theory. We propose to modify the gluon propagator to reconcile perturbation theory with the anomalous Ward identities for the topological current in the $θ$-vacuum. As a result, the gluon couples to the Veneziano ghost describing the tunneling transitions between different Chern-Simons sectors of the vacuum; we call the emerging gluon dressed by ghost loops a "glost". We evaluate the glost propagator and find that it has the form $G(p) = (p^2 + χ_{top}/p^2)^{-1}$ where $χ…
We use gauge/string duality to model a heavy quark-antiquark pair in a color singlet moving through a thermal plasma. In particular, we explore the effect of velocity on the string tension and Debye screening mass. Then we apply the results to the analysis of heavy quarkonium bound states. With some assumptions, we estimate the characteristic size of quarkonium and its dissociation temperature.
In the color string picture with fusion and percolation the dependence of the flow coefficients $v_n$ on the transverse momentum is studied for pp collisions the LHC energy respectively. Monte-Carlo simulations are used to locate simple strings and their fused clusters. The results favorably agree with the CMS data in the region $0.2 \le p_t\le 3.$ GeV/c appropriate for the string scenario.
We use gauge/string duality to model a doubly heavy diquark in a color antitriplet moving in a thermal plasma at temperatures near the critical. With the assumption that there is no relative motion between the constituents, we calculate the drag force on the diquark. At high enough speed we find that diquark string configurations develop a cusp. In addition, we estimate the spatial string tension at non-zero baryon chemical potential, and also briefly discuss an extension to a triply heavy triquark in a color triplet.
In the color string picture with fusion and percolation the elliptic and triangular flows are studied for p-Au and d-Au collisions at 200 GeV. The ordering $v_n(d-Au)>v_n(p-Au)$ observed experimentally for central collisions is reproduced.The calculated elliptic flow $v_2$ at central collisions agrees satisfactorily with thedata. The triangular flow $v_3$ is found to be greater than the experimental values, similar to the resultsobtained in the approach based on the Color Glass Condensate initial conditions with subsequenthydrodynamical evolution.
A Diffusion Model for SU(N) QCD Screening
我们考虑纯SU（N）QCD中威尔逊圈动力学的唯象模型，其中威尔逊圈的期望值是群流形SU（N）上相互作用扩散过程的平均值。这种相互作用是由一个任意的势提供的，它产生了从Casimir标度区到四维规范理论屏蔽相的过渡。这个势必须遵守规范理论的中心对称性，这就预言了任意SU（N）表示与相同N度的反对称表示的屏蔽。因此，在屏蔽开始之前的稳定弦是k-弦。在这个过程中，我们发现了一个非平凡的，但可解的修改QCD_2矩阵模型，涉及到一个任意的潜力。
In view of the planning experiments for collisions of light nuclei at RHIC the flow coefficients for O-O, Al-AL and Cu-Cu collisions are studied in the color string percolation model. Our results for $v_2$ are somewhat smaller than predicted by other groups although with the same dependence on centrality. Our obtained $v_3$ lie between predictions of other groups.
The production of ground-state and excited bottomonia in ultrarelativistic heavy-ion collisions is investigated within a kinetic-rate equation approach including regeneration. We augment our previous calculations by an improved treatment of medium effects, with temperature-dependent binding energies and pertinent reaction rates, $B$-meson resonance states in the equilibrium limit near the hadronization temperature, and a lattice-QCD based equation of state for the bulk medium. In addition to the centrality dependence of the bottomonium yields we compute their transverse-momentum ($p_T$) spectr…
It is shown that the elliptic flow can be successfully described in the color string picture with fusion and percolation provided anisotropy of particle emission from the fused string is taken into account. Two possible sources of this anisotropy are considered, propagation of the string in the transverse plane and quenching of produced particles in the strong color field of the string. Calculations show that the second source gives an overwhelming contribution to the flow at accessible energies.
Color strings, pomeron shadowing and Color Glass Condensate
我审查的问题，部分子饱和度和它的影响，通过三个主要不同的方法，但有些相关：饱和度的几何方法，QCD饱和度通过彩色玻璃凝聚和阴影的Pomeron方法。
Based on the Dyson-Schwinger equation, we compute the resummed gluon propagator in a holonomous plasma that is described by introducing a constant background field for the vector potential $A_{0}$. Due to the transversality of the holonomous Hard-Thermal-Loop in gluon self-energy, the resummed propagator has a similar Lorentz structure as that in the perturbative Quark-Gluon Plasma where the holonomy vanishes. As for the color structures, since diagonal gluons are mixed in the over-complete double line basis, only the propagators for off-diagonal gluons can be obtained unambiguously. On the ot…
Non-Abelian Strings in High Density QCD: Zero Modes and Interactions
高密度色超导中最基本的弦是非阿贝尔半超流弦，它具有色规通量管，但在能量上表现为超流涡旋。我们发现，除了通常的平移零模式，这些涡旋具有归一化的取向零模式在内部空间中，与色味锁定对称性破缺的弦的存在。推导了两平行非阿贝尔半超流弦在一般相对取向零模情况下的相互作用，以显示普遍排斥。这意味着由自发破裂的U（1）B形成的超流涡旋是不稳定的。此外，我们的结果证明了色超导体在外部色规范场存在下的稳定性。
Within the color string percolation model (CSPM), jet transport coefficient, $\hat{q}$, is calculated for various multiplicity classes in proton-proton and centrality classes in nucleus-nucleus collisions at the Large Hadron Collider energies for a better understanding of the matter formed in ultra-relativistic collisions. $\hat{q}$ is studied as a function of final state charged particle multiplicity (pseudorapiditydensity at midrapidity), initial state percolation temperature and energy density. The CSPM results are then compared with different theoretical calculations from the JET Collabora…
Inspired by the states $T_{c\bar{s}0}^{a}(2900)^{0}$ and $T_{c\bar{s}0}^{a}(2900)^{++}$ reported by the LHCb Collaboration, we carry out a systematical investigation of the charm-strange pentaquark system using resonance group method in the quark delocalization color screening model. The present results predict the existence of some bound states and resonance states with support from the study of the mass spectrum and the decay properties. Both $Σ_{c}^{\ast}K^{\ast}$ with $I(J^{P})=\frac{1}{2}(\frac{5}{2}^{-})$ and $ΔD_{s}^{\ast}$ with $I(J^{P})=\frac{3}{2}(\frac{5}{2}^{-})$ are bounded by cha…
Diffraction, the Color Glass Condensate and String Theory
解释了高能碰撞中有色玻璃凝聚体的主要观点。不同的方法来解决这个问题的概述，强调重申的方法。我们提出的证据表明，彩色玻璃凝聚体可以描述一个有效的共形场论，甚至由弦论。
Problems for Supersymmetry Breaking by the Dilaton in Strings from Charge and Color Breaking
软破缺项的参数空间上的一般约束，以避免危险的电荷和色破缺极小值，被施加到四维弦的情况下，其中的介子是超对称破缺的源（介子主导的限制）。结果表明，整个参数空间被排除在这些理由后，目前的实验数据施加在顶部质量。包含一个非零的宇宙学常数并不能从本质上改善前景。可能的出路，这种情况进行了简要讨论。
High spin baryon in hot strongly coupled plasma
本文考虑了AdS-Schwarzschild黑洞背景中有限温度超对称Yang-Mills对偶中探测重子的弦结全息模型。特别地，我们研究了由旋转N_c重夸克组成的高自旋重子的屏蔽长度。为了用有限力转动夸克，我们在夸克体中加入了硬红外截止，并赋予夸克有限质量。我们发现，当N_c微观弦具有有限的角速度ω时，它们被合理地嵌入体几何中，类似于介子的情况。通过定义夸克的临界分离距离为屏蔽长度，数值计算了重子屏蔽长度与夸克的临界分离距离的关系，得到了一个合理的结果，即高自旋重子更容易离解.最后，我们讨论了重子的J和E^2之间的关系。
Effects of Screening on Quark-Antiquark Cross Sections in Quark-Gluon Plasma
对于高阶QCD效应，可以用修正的$K$因子近似修正$q\bar q$产生和湮灭的最低阶截面。对于夸克质量不能忽略的能量，$K$因子由夸克和反夸克之间的初态或终态相互作用引起的波函数畸变决定。我们评估了这个$K$ -因子的$q \bar q$生产和湮灭在夸克-胶子等离子体通过考虑德拜屏蔽通过色汤川势的影响。我们提出的校正$K$ -因子作为一个功能的无量纲参数，可以找到应用程序在其他系统中涉及吸引力或排斥汤川相互作用。$K$ -因子的显著峰出现在具有德拜屏蔽长度为玻尔半径的0.835和3.23倍的吸引$q$ - $\bar q$色-汤川相互作用中，对应于两个最低的$s$ -波$q\bar q$束缚态随着德拜屏蔽长度的减小而移动到连续谱中成为$q\bar q$共振。这些共振，特别是$c\bar c$和$b \bar b$共振，可以用来寻找夸克-胶子等离子体通过研究系统的温度依赖性的重夸克对生产刚刚超过阈值。
Axio-Chameleons: A Novel String-Friendly Multi-field Screening Mechanism
本研究提出一种适用于轴子与Brans-Dicke型伸缩子的新型多场屏蔽机制Axio-Chameleons，依赖二者二阶导数相互作用实现耦合抑制，技术自然且符合弦论低能特征，为引力测试与紫外完备模型研究提供新方向。
We point out that if a certain variant of "Quirks", particles that carry ordinary color and some other color' exist, then we can have a completely novel and efficient mode of long distance communications and of acceleration to very high energies. For very low scale $Λ'$ the scale of the new gauge group in the theory, and associated string tension of the new color' the Quirks can be captured in ordinary materials. Having then the Quirk Q' and anti-Quirk $\bar{Q}'$ in two separate piezoelectric crystals at arbitrarily far out points A and B allows Alice and Bob at these locations to communicate …
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