Tanja Branz, Thomas Gutsche, Valery E. Lyubovitskij
We discuss the two-photon decay width of heavy hadron molecules and study the dependence on the constituent meson masses and on the binding energy. In addition finite size effects due to the extended structure of the bound state are shown to have a strong influence on the predictions for this decay width.
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Hadron Molecules are particles made out of hadrons that are held together by self interactions. In this report we discuss seven such molecules and their self interactions. The $f_0(980)$, $a_0(980)$, $f_1(1400)$, $ΔN(2150)$ and $π_1(1400)$ molecular structure is given. We predict that two more states the $K\overline{K}K(1500)$ and $a_1(1400)$ should be found.
Weak decays of heavy hadron molecules involving the f0(980)
本文采用强子分子理论研究了粲介子和底奇介子Ds0*（2317），Ds1（2460），Bs0*（5725）和Bs1（5778）在f0（980）终态的弱衰变.由于在所提出的框架中的初始和最终状态被占据的强子分子，观测量的预测可以提供一个敏感的工具，以进一步测试强子分子结构在未来的实验。
We propose a mechanism allowing the formation of loosely bound molecules of charmed mesons in high energy proton-(anti)proton collisions.
In the present work, we estimate the decays of the $X(5568)$ and $X(5616)$ in a $B \bar{K}$ and a $B^\ast \bar{K}$ $S$-wave hadronic molecule scenarios, respectively, which may corresponding to the structure observed by D0 Collaboration. Our estimation indicates both $B\bar{K}$ and $B^\ast \bar{K}$ hadronic molecule decay widths could explain the experimental data in a proper model parameter range.
On the mass correction of heavy hadrons of arbitrary spin in heavy hadron effective theory
利用投影算符方法导出了任意自旋重强子的质量修正形式。利用本文的结果导出了有限质量的Bjorken求和规则。
We discuss the hadronic molecule issue in the light and heavy meson sector. Thereby we use the radiative decays of the scalars f0(980) and a0(980) to study its possible molecular K barK structure. Further on we extend our formalism to mesons with open charm and strangeness, Ds0*(2317) and Ds1(2460), whose hadronic molecule interpretation is analyzed in weak decays with f0(980) in the final state.
The precise measurement of binding energy, total width and DDpi branching fraction, constrains, in a model independent way, the loosely bound hadron molecule interpretation of X(3872). A full discernment is not yet possible on the basis of present data. Similar considerations might be extended to all those Y,Z resonances susceptible of a molecular description.
The newly observed hidden-charm meson Zc(3900) with quantum numbers J(P) = 1(+) is considered as a hadronic molecule composed of DD*. We give detailed predictions for the decay modes Zc(+) -> J/psi + pi(+) + gamma and Zc(+) -> J/psi + pi(+) + l(+) + l(-) (l = e, mu) in a phenomenological Lagrangian approach.
Properties of scalar mesons below 1.0 GeV have been studied by regarding them as hadronic molecular states. Using the effective Lagrangian approach, we have calculated their leptonic decays, strong decays and productions via the $ϕ$ meson radiative decays. Comparing our results with that given in the literature and the data, we conclude that it is difficult to arrange them in the same nonet if some of them are pure hadronic molecules.
The two newly observed hidden-bottom mesons Zb(10610) and Zb'(10650) with quantum numbers J(P) = 1(+) are considered as hadronic molecules composed of BB(*) and B(*)B(*), respectively. We give predictions for the widths of the strong two-body decays Zb(+) to Upsilon(nS) + pi(+) and Zb'(+) to Upsilon(nS) + pi(+) in a phenomenological Lagrangian approach.
Ratios of Antiparticle/Particle Yields in Hadron-Hadron and Heavy Ion Collisions
我们比较了高能重离子碰撞中反重子/重子产生比的数值计算结果和一些理论模型。
Model-independent predictions for decays of double-heavy hadrons into pairs of heavy hadrons
本文基于 Born-Oppenheimer 不相容原理、全同粒子约束及角动量和宇称守恒，导出双重重强子衰变为重强子对的模型无关选择定则与相对衰变率。
Hadronic Molecules and Low-Energy Hadron-Hadron Scattering Amplitudes
分子是强子对的弱束缚态，近年来引起了人们极大的兴趣。分子存在的问题与确定低能强子-强子散射振幅的更一般的问题密切相关，人们普遍认为这需要非微扰方法。在这篇文章中，我们报告夸克模型计算使用一个简单的微扰散射机制，一个胶子交换后，组分交换。我们把相关的图称为“夸克玻恩图”。对于选择隔离这种机制的情况下，I=2 $ππ$，I=3/2 K $π$和KN的结果通常是在良好的协议与实验S波散射振幅给定的标准势模型参数，和NN我们发现微扰的结果非常相似的非微扰硬核的奥卡和矢崎。我们还讨论了我们的研究结果为其他不太熟悉的渠道，这些包括预测的矢量矢量束缚态，其中之一可能是$θ(1710)$。
Two-photon decays of hadronic molecules
在强子分子双光子衰变的许多计算中，衰变矩阵元是用原点处的波函数来估计的，类似于电子偶素的双光子衰变。我们质疑这种方法对强子分子双光子衰变的适用性，因为它在计算中引入了一个不受控制的模型依赖。作为一种替代方法，我们提出了一个明确的评价强子回路。对于浅束缚态，这可以作为分子结合力范围的幂的扩展来完成。在第一个顺序中，人们得到了众所周知的点式极限答案。本文用自洽和规范不变的方法估计了从K介子环中产生的弱束缚强子分子的双光子衰变宽度的前沿射程修正。我们发现它们很小。可能的短程运营商和标量的宽度的作用仍有待研究。
Exotic Hidden-heavy Hadrons and Where to Find Them
本文提出将伴随强子势中在接近重强子对阈值前交叉至其下方的束缚态和共振态识别为奇异隐重强子，解释了此类强子能量接近阈值的原因及其显著特性的来源。
The X(3872) is universally accepted to be an exotic hadron. In this letter we assume that the X(3872) is a D0 \bar D0* molecule, as claimed by many authors, and attempt an estimate of its prompt production cross section at Tevatron. A comparison with CDF data allows to draw some qualitative conclusions about this statement.
Global duality in heavy flavor hadronic decays
我们证明了当重介子强子衰变宽度在重夸克质量M上以1/M^2量级的精度涂抹时，满足夸克-强子对偶性。
Hadronic Molecules and the f0(980)/a0(980)
本文讨论了f0（980）和a0（980）介子作为K和Kbar介子的强子分子束缚态的可能解释。使用唯象拉格朗日方法，我们计算了强f0（980）到pi pi和a0（980）到pi eta以及电磁f0（980）到gamma gamma和a0（980）到gamma gamma衰变。的协变和规范不变模型，它也允许有限尺寸的强子分子的影响，提供了良好的协议与现有的数据和其他理论方法的结果。
In this work we study the properties of hadronic molecules in the heavy-quark sector. These have become increasingly important since from the beginning of this century a large number of states have been measured that for different reasons do not fit the predictions of simple quark models. In particular we discuss two candidates in the open charm sector, $D_{s0}^*(2317)$ and $D_{s1}(2460)$, and two candidates in the bottomonium sector, $Z_b(10610)$ and $Z_b(10650)$. Theorists have proposed different explanations for these states including tetraquarks, hybrids, hadro-quarkonia and, subject of th…
PQCD Analysis of Inclusive Heavy Hadrons Decays
我们发展了包含重强子衰变的微扰QCD形式。引入部分子的横向自由度，使重强子衰变的分解变得容易。
Schwinger Model and String Percolation in Hadron-Hadron and Heavy Ion Collisions
在弦的Schwinger模型的框架下，我们建立了强子-强子和重离子碰撞中多重数与横动量平方分布之间的一般关系。我们的一些结果与彩色玻璃冷凝模型一致。
Unified Description of Hadrons and Heavy Hadron Decays
利用轻夸克的手征味对称性和重夸克的手征味对称性，构造了一个描述轻重强子相互作用的有效拉格朗日量。对于轻扇区和重扇区，我们在拉格朗日量中包含了赝标量、矢量和重子。作为我们形式的应用，讨论了重强子衰变。由$D^0 \rightarrow K^- e^+ν_e$衰变的实验数据拟合了$D_s$衰变常数和重介子、重矢量介子和轻介子之间的耦合常数。我们还指出了从$Λ_b \rightarrow p l \bar ν$衰变中独立测定$|V_{ub}|$的可能性。
We explore the consequences of heavy flavour, heavy quark spin and heavy antiquark-diquark symmetries for hadronic molecules within an effective field theory framework.. Owing to heavy antiquark-diquark symmetry, the doubly heavy baryons have approximately the same light-quark structure as the heavy antimesons. As a consequence, the existence of a heavy meson-antimeson molecule implies the possibility of a partner composed of a heavy meson and a doubly-heavy baryon. In this regard, the D\bar D* molecular nature of the X(3872) will hint at the existence of several baryonic partners with isospin…
Non-Equilibrium Heavy Flavored Hadron Yields from Chemical Equilibrium Strangeness-Rich QGP
用化学非平衡统计强子化模型计算了从富奇异性QGP中发射的重味强子的产额，并考虑了强子化时奇异性、粲和熵的守恒.
The Status of Molecules
强子分子是两个或多个强子的弱束缚态。我们首先简要的历史的主题，并讨论了几个很好的候选人，然后抽象的分子，这可能是在可能的分子状态的分类感兴趣的一些签名。接下来，我们认为，一个更普遍的理解$2\to 2$强子-强子散射振幅将是至关重要的分子搜索，并讨论了我们最近在这方面的一些工作。最后，我们讨论了一些最近的分子候选者（特别是$f_0(1710)$），这些分子还没有很好地确定为分子，但满足一些预期的签名。
Model-independent predictions for decays of hidden-heavy hadrons into pairs of heavy hadrons
本文利用 Born-Oppenheimer 势跃迁及角动量、宇称守恒，推导隐重味强子衰变到重味强子对的模型无关选择定则与相对衰变率，并检验夸克偶素和杂化态。
Hadrons with Two Heavy Quarks
本文综述了含两个粲夸克或更一般的两个重夸克的强子的谱学和一些性质。这包括像$(bcu)$这样的重子，以及可能的奇异多夸克态。
Review of Heavy Hadron Spectroscopy
介绍了最近发现的一些重强子的现状。
Comparision of the Pion Emission Function in Hadron-Hadron and Heavy-Ion Collisions
结合单粒子分布的结果与玻色-爱因斯坦关联分析在同一实验中，时空发射函数提取的时间和纵坐标的函数，以及横坐标的函数。前一个函数对于两种碰撞都类似于回飞棒（由于重离子碰撞中冻结时间较大，仅在时间方向上移动），后一个函数对于重离子碰撞是高斯函数，但对于强子-强子碰撞是环形函数。
In this proceeding, we present our recent work on decay behaviors of the $P_c$ hadronic molecules, which can help to disentangle the nature of the two $P_c$ pentaquark-like structures. The results turn out that the relative ratio of the decays of $P^+_c(4380)$ to $\bar{D}^* Λ_c$ and $J/ψp$ is very different for $P_c$ being a $\bar D^*Σ_c$ or $\bar DΣ_c^*$ bound state with $J^P=\frac{3}{2}^-$. And from the total decay width, we find that $P_c(4380)$ being a $\bar DΣ_c^*$ molecule state with $J^P=\frac{3}{2}^-$ and $P_c(4450)$ being a $\bar D^*Σ_c$ molecule state with $J^P=\frac{5}{2}^+$ is more…
Heavy diquark effective theory and supersymmetry of hadrons containing a single heavy quark
提出了一种新的含单重夸克强子的超对称性。这种超对称性是基于对这些强子的一种新的近似，我们认为这是超越重子的旁观者轻双夸克模型的又一步。重双夸克有效理论是由Georgi和Wise $^1$和Carone $^2$在不同的背景下引入的技术构建的。这个理论可以与重夸克有效理论一起被纳入超对称理论，并导致介子和重子的共同普适Isgur-Wise函数。
The origin and main properties of new heavy hadrons as dark matter candidates, are represented. Low-energy interactions of new hadrons with leptons and nucleons are described in the terms of effective vertexes. We consider the lowest excited levels of new mesons in the frame-work of the Heavy Quark Effective Theory. The effect of fine and hyper-fine splitting of excited states follows directly from this theory. We analyze phenomenological consequences of this effect as manifestation of dark matter particles.
Lifetime pattern of heavy hadrons
讨论了弱衰变重强子的寿命模式。
We consider weak decays of heavy hadrons (bottom and charmed) where the heavy quark acts as a spectator. Theses decays are heavily phase-space suppressed but may become experimentally accessible in the near future. These decays are interesting as a QCD laboratory to study the behaviour of the light quarks in the colour-background field of the heavy spectator.
The Pattern of Exotic Hidden-Heavy Hadrons Revealed
本研究运用QCD的Born-Oppenheimer近似，将奇特隐重味强子描述为短程排斥势中的束缚态与共振，解释其接近重味强子对阈值的模式并限制预测态数量。
Radiative decays of hadronic molecules
有人认为，标量a0/f0（980）的辐射衰变可以作为一个决定性的工具，在建立后者的性质。特别地，在标量的分子模型的框架中给出了辐射衰变S-> γ V（S=a0/f0（980），V=omega/rho/gamma）的宽度的预测。本文详细讨论了强子分子两γ衰变的短程修正，特别注意了问题中涉及的各种尺度的相互作用和振幅的规范不变性。结果被应用到双光子衰变的f0（980），和现有的实验数据，这种衰变被认为是支持的标量f0（980）的分子分配。
Inclusive Heavy Hadron Decays and Light-Cone Dynamics
证明了光锥动力学在包含重强子衰变过程中的支配作用。利用轻锥展开和重夸克有效理论可以系统地计算非微扰QCD效应对过程的影响。简要评述了光锥方法在研究电弱相互作用、强相互作用和美强子的半轻子衰变和辐射衰变的强子结构中的应用。
Phenomenological Study of Strong Decays of Heavy Hadrons in Heavy Quark Effective Theory
本文介绍了重夸克有效理论（HQET）的张量形式在重强子强衰变中的应用。给出了B介子、D介子和K介子衰变率比的实验预测和理论预测的比较。HQET对奇异介子的应用给出了一些令人鼓舞的结果。自旋-味道对称性被用来预测一些尚未被测量的衰变率。
Direct hadron production in ultrarelativistic heavy ion collisions
夸克-胶子等离子体（QGP）在相变为强子气体之前的前表面层发射的强子被认为是QGP直接信息的可能来源。结果表明，如果在超相对论重离子碰撞中产生QGP，这些强子在软p_t处占优势。
Towards a NNLO calculation in hadronic heavy hadron production
我们计算的Laurent级数展开到${\cal O}(ε^2)$的所有标量单圈一，二，三，四点积分，需要在强子重味生产的计算。在强子对撞机重强子产生的NNLO修正中，需要输入到${\cal O}(ε^2)$的Laurent级数，其中单圈积分出现在逐圈贡献中。四点积分是最复杂的。四点积分的${\cal O}(ε^2)$展开式包含至多$ Li_4$的多项式和多重多项式。
Exotic pentaquarks, crypto-heptaquarks and linear three-hadronic molecules
在这个演讲中，多夸克在一个标准的夸克模型微观研究。计算了纯基态五夸克态的短程相互作用，结果表明短程相互作用是排斥的，窄五夸克态不可能处于基态。作为一种可能的激发，一个额外的夸克-反夸克对，然后考虑，这是建议产生线性分子系统，与一个狭窄的衰变宽度。这种激发可能在能量上有利于其他五夸克模型提出的p波激发。在这里，夸克聚集在三个强子簇中，中心强子提供稳定性。研究了可能的具有奇异五夸克味的隐七夸克强子。
We discuss the possible interpretation of X(3872) as a $DD^{\ast}$ hadronic molecule with $J^{PC} = 2^{-+}$. Using the phenomenological Lagrangian approach, we studied its radiative and strong decay properties. We find that our model with about 97.6% isospin zero component explains the existing data nicely. We predict the partial widths of the radiative and strong decays of X(3872) and show that the measurement of the ratio $\mathcal{B}(X(3872) \to χ_{c0}π^0)/\mathcal{B}(X(3872) \to χ_{c1}π^0)$ may signal the nature of X(3872).
Heavy Hadron Spectrum and Interactions
从QCD的近似对称性出发，即轻夸克的手征对称性和重夸克的自旋和味对称性，研究了重强子的低能性质。为此，我们构建了一个一致的夸克-反夸克和夸克-双夸克相互作用的图片作为一个低能量近似的味道动力学在重介子和重子，分别。使用标准的功能集成工具，我们推导出一个有效的拉格朗日重强子场和讨论的几个属性，如质谱，耦合和衰变常数，Isgur-明智的形状因子。
Chiral symmetry and many-body nonleptonic decays of heavy hadrons
我们认为，类似于手征有效拉格朗日量最近在涉及Goldstone玻色子的重强子半轻子衰变中的许多应用，手征对称性也可以应用于重强子的多体非轻子衰变。作为例子，我们建立了底强子典型多体非轻子衰变的手征有效哈密顿量。我们讨论的最低阶的贡献来自这样的哈密顿量。我们强调，这种方法的广泛应用是可能的。
Open-Flavor Heavy Hadron Production in Heavy-Ion Collisions
该研究基于夸克并合模型与统一现实夸克模型波函数，在同一框架内计算重离子碰撞中常规及奇特开味重强子的产额、横动量谱，并考察手征对称性部分恢复的影响。
Nucleus-nucleus collisions offer a great opportunity for analyzing and determining the intrinsic nature of heavy and exotic hadrons. In this sense, here we discuss how the production and dissociation of hadron states are affected by reactions during the expansion of hadronic matter in a heavy-ion collision environment. We give emphasis to recent works on exotic states, revisiting as a case study the time evolution of the abundances of the $X_{0,1}(2900)$ states.
Same-sign dileptons as a signature for heavy Majorana neutrinos in hadron-hadron collisions
我们讨论了同号双轻子作为Majorana中微子签名的可能性。产生机制由单个重中微子产生和衰变质子-质子-> 1 ^{ \pm } N X -> 1 ^{ \pm } 1 ^{ \pm } X '给出。给出了LHC能量的截面和分布。
Pattern of Lifetimes of Beauty Hadrons and Quark-Hadron Duality in Heavy Quark Expansion
讨论了在重夸克展开式在$b$中三阶收敛的条件下，四夸克算符期望值的估计，以及部分子衰变率的偶性破缺短程非微扰修正的估计.最后指出所得结果对重夸克展开中夸克-强子对偶性假设的意义。
The recent theory developments and latest experimental results on heavy-flavour production in Deep Inelastic Scattering and at hadron colliders are summarized. Models of heavy quarkonia production, non-perturbative corrections to fragmentation, theory of heavy-hadron production in heavy-ion collisions, and interpretation of new exotic hadrons are discussed. Progress in event generators development is reported. Most recent experimental results from HERA and e+e- colliders as well as from proton-(anti)proton and heavy ion experiments are presented and the role of charm and beauty quarks in the a…
Masses of Heavy Hadrons
本文在非相对论性夸克模型中估计了重强子的质量，该模型考虑了自旋和味相关的双夸克超精细分裂。在计算质量值时，还考虑了原点波函数值和强耦合常数的变化对质量的影响。
In the framework of diquark model for production we discuss the yields and observation prospects for excited states of doubly heavy baryons at LHC kinematic conditions.
Heavy Quark Expansion for Heavy Hadron Lifetimes: Completing the $1/m_b^3$ Corrections
本文完成了重强子寿命重夸克展开中维度六算符的贡献计算，给出了 Darwin 项和自旋-轨道项 Wilson 系数在树图阶的表达式，补全了 $1/m_b^3$ 阶修正。
Heavy hadrons in the relativistic quark model
在相对论夸克模型中，分别采用重夸克-轻双夸克近似和双夸克-反双夸克近似计算了重子和四夸克的质量。
Hadronization and Decay of Excited Heavy Hadrons in Herwig 7
本文在Herwig 7中基于HQET改进激发态重强子的极化传递、衰变模式、产生率及参数调谐，并与实验数据比较，相关更新将在Herwig-7.3.0发布。
QCD and Heavy Hadron Decays
我们回顾了量子色动力学在重强子弱衰变中的应用的最新进展。我们专注于稀有和非轻子B介子衰变，讨论当前感兴趣的理论框架和唯象问题。
We present a comprehensive phenomenological study of heavy flavor distributions and correlations in longitudinally polarized proton-proton collisions at BNL-RHIC. All results are obtained with a flexible parton-level Monte Carlo program at next-to-leading order accuracy and include the fragmentation into heavy mesons, their subsequent semi-leptonic decays, and experimental cuts. Next-to-leading order QCD corrections are found to be significant for both cross sections and double-spin asymmetries. The sensitivity of heavy flavor measurements at BNL-RHIC to the gluon polarization of the nucleon i…
Radiative decays of heavy hadrons from light cone QCD sum rules in the leading order of HQET
本文用重夸克有效理论的第一阶轻锥QCD求和规则研究了重子和最低三重态重介子的辐射衰变。
Nonfactorizable Corrections to Hadronic Weak Decays of Heavy Mesons
综述了$D$和$B$介子排他强子弱衰变中不可因式分解效应的研究现状。
Heavy Quark Production in DIS and Hadron Colliders
我们提供了一个简单的概述，目前的一些实验和理论问题的重夸克生产。
Theory of Weak Inclusive Decays and Lifetimes of Heavy Hadrons
本文简要地回顾了重味衰变的前渐近效应理论。
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