Estimates for parameters and characteristics of the confining SU(3)-gluonic field in the ground state of toponium: Relativistic and nonrelativistic approaches

Partial wave interference mechanism in gluonic dissociation of $J/ψ$

We explicitly take into account the effect of hydrodynamic expansion profile on the gluonic breakup of $J/ψ$'s produced in an equilibrating parton plasma. Attention is paid to the space-time inhomogeneities as well as Lorentz frames while deriving new expressions for the gluon number density $n_g$, average dissociation rate $<\tildeΓ>$, and $ψ$ survival probability $S$. A novel type of partial wave {\em interference} mechanism is found to operate in the formula of $<\tildeΓ>$. Nonrelativistic longitudinal expansion fro small length of the initial cylinder is found to push the $S(p_T)$ graph ab…

在 pNRQCD 中 $J/\psi$、$\psi(2S)$ 和 $\Upsilon$ 态的包容性产生

Inclusive production of $J/ψ$, $ψ(2S)$, and $Υ$ states in pNRQCD

基于 pNRQCD 有效场论计算了 $J/\psi$ 等态包容性产生的长程矩阵元，用波函数和普适胶子关联子表示以减少未知数，所得截面与极化结果与 LHC 测量吻合。

Quark Nuclear Physics with Heavy Quarks

Heavy quarks have been instrumental for progress in our exploration of strong interactions. Quarkonium in particular, a heavy quark-antiquark nonrelativistic bound state, has been at the root of several revolutions. Quarkonium is endowed with a pattern of separated energy scales qualifying it as special probe of complex environments. Its multiscale nature has made a description in Quantum Field Theory particularly difficult up to the advent of Nonrelativistic Effective Field Theories. We will focus on systems made by two or more heavy quarks. After considering some historical approaches based …