Abstract
The BESIII experiment, hosted at the IHEP of Beijing, has collected the world largest data sample in the charmonium energy region. One of the most important physics goals of BESIII is the investigation of the QCD prediction. QCD can be accessed in a unique way by means of hadron spectroscopy, which was extensively studied and many important progresses were achieved in the last years. Charmonium decays provide an excellent scenario for studying nucleons, hyperons and their excited states, XYZ resonances, as well as light hadrons. Some of the most recent results for hadron spectroscopy from BESIII will be reported.
Highlights
Particles subject to the strong interaction are defined as hadrons
Departing from the interaction point, it hosts, inside a 1T solenoidal magnetic field, 43 e-mail: destefan@to.infn.it small-celled, helium-based main drift chamber (MDC) chambers for charged tracks reconstruction, a time-of-flight (TOF) system for particle identification, and an electromagnetic calorimeter (EMC) composed of 6240 CsI (Tl) crystals arranged in a cylindrical shape plus two end-caps
The invariant mass spectrum was investigated by means of Partial Wave Analysis (PWA): the structure was described with a Breit-Wigner (BW) function, and f2(1910), f0(2100), 0++ phase space (PS), as shown in Fig.3, and a final state interaction (FSI) effect using the Juelich formulation [13] were included as well
Summary
Particles subject to the strong interaction are defined as hadrons. The hadronic states description is provided by the quark model [1]. The strong interaction is described by the well estabilished QCD theory. In order to obtain a deep understanding of QCD, its predictions have to be searched for and properly investigated. Hadron spectroscopy is a poweful tool to understand the quark structure of the particles, and the force which acts between them. This knowledge could be gained by searching for new hadronic states, and by a deep investigation of the light hadron sector. Studies performed in the charmonium energy range offer an appropriate playground to investigate the hadronic interactions, and complementary informations to the existing data
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