Abstract
We perform a systematic analysis of the J/psi rightarrow gamma pi ^0pi ^0 and rightarrow gamma K_S^0 K_S^0 partial waves measured by BESIII. We use a large set of amplitude parametrizations to reduce the model bias. We determine the physical properties of seven scalar and tensor resonances in the 1–2.5 , {mathrm {GeV}} mass range. These include the well known f_0(1500) and f_0(1710), that are considered to be the primary glueball candidates. The hierarchy of resonance couplings determined from this analysis favors the latter as the one with the largest glueball component.
Highlights
The vast majority of observed mesons can be understood as simple qqbound states, in principle strong interactions permit a more complex spectrum
The mass we find for the f0(1710) is considerably larger than the Particle Data Group (PDG) average, it is still compatible with many of the determinations listed in the PDG
It is worth noting that our poles are compatible with the ones on the BESIII J/ψ → γ ηη decay [44], even if we do not include this channel
Summary
The vast majority of observed mesons can be understood as simple qqbound states, in principle strong interactions permit a more complex spectrum. In a pure Yang–Mills theory, massive gluon bound states (named “glueballs”) populate the spectrum, as shown for example in lattice calculations. The lightest glueball is expected to have J PC = 0++, and a mass between 1.5 and 2 GeV [1,2,3,4,5,6,7,8,9]. An enhanced glueball production is expected in OZI–suppressed processes, i.e
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
