Nuclear Theory·nucl-th
5 papers—2 primary·3 cross-listed
Bruno Scheihing Hitschfeld🇺🇸 · Xiaojun Yao🇺🇸
We review recent progress in understanding quarkonium dynamics inside the quark-gluon plasma as an open quantum system with a focus on the definition and nonperturbative calculations of relevant transport coefficients and generalized gluon distributions.
Jun Gao🇺🇸 · ChongYang Liu🇺🇸 · XiaoMin Shen🇺🇸 · Hongxi Xing🇨🇳 · Yuxiang Zhao🇨🇳
We perform a simultaneous global analysis of hadron fragmentation functions (FFs) to various charged hadrons at next-to-leading order in QCD. The world data set includes results from electron-positron single-inclusive annihilation, semi-inclusive deep inelastic scattering, as well as proton-proton collisions including jet fragmentation measurements which lead to strong constraints on the gluon fragmentations. By carefully selecting hadron kinematics to ensure the validity of QCD factorization and the convergence of perturbative calculations, we achieve a satisfying best fit with d.o.f., in the simultaneous extraction of FFs for light charged hadrons (, and ). The total momentum of , quarks and gluon carried by light charged hadrons have been determined precisely. That urges future precision measurements on fragmentation to neutral hadrons, which are crucial for the test of fundamental sum rules in QCD fragmentation.
Deeptak Biswas🇮🇳 · Peter Petreczky🇺🇸 · Sayantan Sharma🇮🇳
We study the QCD equation of state and the chiral condensate using the hadron resonance gas model with repulsive mean-field interactions. We find that the repulsive interactions improve the agreement with the lattice results on the derivatives of the pressure with respect to the baryon chemical potential up to eighth order. From the temperature dependence of the chiral condensate we estimate the crossover temperature as a function of baryon chemical potential, . We find that the chiral crossover line starts to deviate significantly from the chemical freeze-out line already for MeV. Furthermore, we find that the chiral pseudocritical line can be parametrized as with and , which are in agreement with lattice QCD results for small values of . For the first time we find a tiny but non-zero value of in our study.
first authorsco-authorsvia INSPIRE