We study the production of meson resonance at p T ≥ 2 GeV/c in π − Be interactions at two beam energies (150 and 300 GeV/c). The motivation is to look for the higher twist (HT) production mechanism, expected to exist besides standard hadron production through the fragmentation process of scattered quarks and gluons, the socalled leading twist (LT) mechanism. We show that the φ, K * 0 (892) and K * 0 (892) are found free from HT effects with a good accuracy, as expected from HT estimates and qcd sum rules. The magnitudes of the f 2 (1270) and ρ 0 mesons signals are found larger than expected from the standard Lund (LT) Monte Carlo and from information provided by e + e − annihilation experiments. The possible connection of these excesses with HT physics is discussed. We also report the first evidence for the production of f 0 (975) mesons in hadronic experiments at large p T .
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.