as the particle's discovery in March 2021. String theory In early particle physics, the 'pomeron sector' was what is now called the 'closed string sector' while what was called the 'reggeon sector' is now the 'open string theory'. See also Giuseppe Cocconi Tamás Csörgő References Further reading External links Pomerons at Fermilab Subatomic particles Quantum chromodynamics Hadrons Hypothetical particles