QCD Sum Rules Analysis of Weak Decays of Doubly-Heavy Baryons
Yu-Ji Shi, Wei Wang, Zhen-Xing Zhao
Abstract
Abstract We calculate the weak decay form factors of doubly-heavy baryons using three-point QCD sum rules. The Cutkosky rules are used to derive the double dispersion relations. We include perturbative contributions and condensation contributions up to dimension five, and point out that the perturbative contributions and condensates with lowest dimensions dominate. An estimate of a part of the gluon–gluon condensates show that it plays a less important role. With these form factors at hand, we present a phenomenological study of semileptonic decays. The future experimental facilities can test these predictions, and deepen our understanding of the dynamics in the decays of doubly-heavy baryons.
Topics & Concepts
PhysicsParticle physicsQCD sum rulesBaryonDimension (graph theory)Quantum chromodynamicsPerturbative QCDPoint (geometry)HyperonForm factor (electronics)Perturbation theory (quantum mechanics)Theoretical physicsSum rule in quantum mechanicsSemileptonic decayStatistical physicsGluon condensateMixing (physics)Dynamics (music)Dispersion (optics)Field theory (psychology)CondensationDispersion relationElementary particlePerspective (graphical)Quantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studiesHigh-Energy Particle Collisions Research