Mainz 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 72: Hadron Structure and Spectroscopy XII

HK 72.3: Vortrag

Donnerstag, 31. März 2022, 16:45–17:00, HK-H8

Search for the Production of the f₁(1285) Resonance in e⁺e⁻ Collisions using Initial State Radiation at BESIII — •Jan Muskalla, Achim Denig, Christoph Florian Redmer, and Riccardo Aliberti — Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Deutschland

Hadronic light-by-light scattering (HLbL) is a limiting process for the precision of the Standard Model prediction for the anomalous magnetic moment of the muon a_µ. The uncertainty of a_µ^HLbL can be improved using detailed measurements of transition form factors (TFF) of the two-photon coupling to mesons. One such TFF study of interest is on the f₁(1285) meson which can be produced via two-photon fusion processes in e⁺e⁻ annihilations. The BESIII experiment at the electron-positron collider in Beijing (BEPC-II) has collected the world’s largest data sets in the τ-charm energy region. Initial state radiation (ISR) allows for a search of the f₁ resonance at energies below the center of mass energy of the collider. The decay channel e⁺e⁻ → f₁ γ_ISR → π⁰ π⁰ η   γ_ISR → 7γ is searched. If successful, this will shed light on the two-photon coupling to the f₁ resonance (J^PC=1⁺⁺) since the resonance is only accessible in e⁺e⁻ annihilation via a two-photon production process. To perform a blind analysis, Monte Carlo simulations for the signal and background channels are analyzed with the aim of performing the analysis on data sets from BESIII with a combined luminosity of 20 fb⁻¹.