Conveners
QCD: 1
- Manqi Ruan (IHEP)
QCD: 2
- Xuan Chen (Shandong University)
Description
Zoom Link, ID:96812316331, Code:367916:
With the public release of parton level event generator NNLOJET, antenna subtraction method has been playing an important role in the precision predictions of high energy colliders. The talk includes the latest development of the antenna subtraction method and its application to di-jet productions on electron-positron colliders with up to N3LO QCD corrections.
The 𝑒+𝑒− annihilation of unpolarized beams is free from initial hadron states or initial anisotropy around the azimuthal angle, hence ideal for studying the correlations of dynamical origin via final state jets. We investigate the planar properties of the multi-jet events employing the relevant event-shape observables at next-to-next-to-leading order (O(𝛼3𝑠)) in perturbative QCD; particularly,...
Single-inclusive hadron production in electron-positron annihilation (SIA) represents the cleanest process for investigating the dynamics of parton hadronization, as encapsulated in parton fragmentation functions. In this talk, I will present the analytical computation of QCD corrections to the coefficient functions for SIA at next-to-next-to-next-to-leading order (N3LO) accuracy based on...
Fragmentation functions (FFs) are crucial non-perturbative inputs in quantum chromodynamics (QCD) for predicting hadron production cross sections in high-energy scattering processes. In this talk, we present recent progress on global fits of FFs by the Non-perturbative Physics Collaboration (NPC). Our analyses incorporate a comprehensive set of precision measurements, including data from the...
We demonstrate the feasibility of determining the strong coupling constant, $\alpha_s$, from the inclusive semileptonic decay width of $B$ mesons. We express the semileptonic $B$ decay width as a function of $\alpha_s(5\mathrm{\,GeV})$, the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$, $b$- and $c$-quark masses in the $\overline{\mathrm{MS}}$ scheme. We fit $\alpha_s(5\mathrm{\,GeV})$...
Within a phenomenological diquark fragmentation model, we study the production of doubly charmed tetraquark Tcc via photon-photon fusion at electron-positron colliders. The production of Tcc is divided into two steps: the perturbative production of heavy (cc)-diquark and its nonperturbative hadronization. It is found that it is promising to observe the tetraquark Tcc via photon-photon fusion...
Understanding decoherence during the evolution from high-energy (UV) to low-energy (IR) scales is a critical challenge for the new frontier of quantum information science at colliders. In this talk, I will present a novel framework that treats Renormalization Group (RG) flow itself as the engine of decoherence. By combining Soft-Collinear Effective Theory (SCET) with open quantum system...
