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| eta prime meson | |
|---|---|
| Name | eta prime meson |
| Composition | mixture of quark–antiquark states |
| Statistics | boson |
| Interaction | Strong interaction, Electromagnetic interaction, Weak interaction |
| Parity | −1 |
| Mass | 957.78 MeV/c² |
| Width | ~0.2 MeV (total) |
eta prime meson The eta prime meson is a neutral pseudoscalar meson observed in high‑energy experiments and studied in quantum chromodynamics. It plays a central role in investigations carried out at facilities such as CERN, KEK, SLAC National Accelerator Laboratory, and Brookhaven National Laboratory and features in theoretical work by researchers associated with institutions like Princeton University, University of Cambridge, Massachusetts Institute of Technology, and University of Tokyo.
The particle appears in the meson spectrum alongside particles investigated at collaborations like ATLAS, CMS, Belle II, and BESIII. Its study intersects with research programs at experiments including LEP, RHIC, HERA, and Fermilab. Prominent theorists from Stanford University, Caltech, Harvard University, and University of Oxford have contributed to understanding its role in symmetry breaking and anomaly phenomena.
The eta prime is a pseudoscalar boson with spin 0 and negative parity, characterized by a mass measured in laboratories such as CERN and SLAC. Its quark content is described by admixtures of light quark flavors whose phenomenology is treated in frameworks developed at Princeton University and University of California, Berkeley. The particle’s anomalously large mass relative to other pseudoscalar mesons motivated analyses by researchers affiliated with Institute for Advanced Study, Institute of Theoretical Physics (China), and Perimeter Institute. Its lifetime and total width have been refined by collaborations like CLEO, BaBar, and KLOE.
Eta prime mesons are produced in reactions at colliders and fixed‑target experiments run by organizations such as CERN, KEK, DESY, and Brookhaven National Laboratory. Production channels include hadronic collisions studied by ATLAS, CMS, and ALICE', radiative decays investigated at BESIII and Belle II, and photoproduction experiments at facilities like Jefferson Lab. Dominant decay modes and branching fractions have been measured by collaborations such as BaBar, CLEO, KLOE, and NA48 with decay topologies analyzed in detectors developed by groups at University College London, INFN, and Max Planck Society laboratories.
The eta prime is central to discussions of the axial U(1) anomaly originally analyzed by theorists from Institute for Advanced Study, Princeton University, and CERN. Its properties test predictions from Quantum chromodynamics formulated in frameworks advanced by groups at University of Chicago, Rutgers University, and University of Illinois Urbana–Champaign. Lattice QCD calculations by collaborations at Brookhaven National Laboratory, Thomas Jefferson National Accelerator Facility, and RIKEN have targeted the eta prime mass and mixing. The particle figures in effective field theory approaches developed at University of Bonn, University of Bern, and Syracuse University and in models connected to the Nambu–Jona-Lasinio model pursued at University of Tokyo and University of California, San Diego.
Precise measurements of the eta prime mass and decay rates have been reported by experiments including CLEO, BaBar, Belle, BESIII, and KLOE. High‑statistics studies at LHCb and analyses from ALICE and NA48 have provided constraints on production cross sections and polarization observables. Detector technologies from teams at CERN, KEK, DESY, and Fermilab enabled reconstruction of multi‑photon and multi‑pion final states used to extract branching fractions, with systematic studies guided by collaborations such as PDG and theoretical input from groups at European Organization for Nuclear Research and Institute of Nuclear Physics PAN.
Understanding the eta prime informs broader studies of mesons like the pi meson, eta meson, phi meson, rho meson, and heavier states examined at CERN, SLAC, and KEK. Its role in hadron structure impacts analyses of nucleon form factors pursued at Jefferson Lab and spin phenomena explored at RHIC. The eta prime is also relevant to searches for physics beyond the Standard Model conducted by collaborations including ATLAS and CMS and to astrophysical modeling undertaken at institutions like Max Planck Institute for Astrophysics and Lawrence Berkeley National Laboratory.
Category:Mesons