6533b7d9fe1ef96bd126c191

RESEARCH PRODUCT

Direct production of χc1 at BESIII

Yu-ping Guo

subject

PhysicsAnnihilationNeutral current010308 nuclear & particles physicsPhysicsQC1-999Quantum number01 natural sciencesLuminosityNuclear physicsDirect production0103 physical sciencesHigh Energy Physics::Experiment010306 general physicsProduction rate

description

The production of resonances in electron-positron annihilation has only been observed for states with quantum numbers JPC = 1−−, while C = +1 resonances appear only among the decay products. The direct production of the 1++ states could happen through two-photon or neutral current. Due to the smallness of the production rate, this process has never been verified experimentally. With the high luminosity and good performance of the BESIII experiment, a search of the direct production of the 1++ state in charmonium region, χc1, is undergoing with dedicated data samples around the χc1 mass. An overview of the data analysis will be presented.

yearjournalcountryeditionlanguage
2019-01-01EPJ Web of Conferences
https://doi.org/10.1051/epjconf/201920206009