Measurement of inclusive f1(1285) and f1(1420) production in Z decays with the DELPHI detector

Abdallah, J.; Blom, H. M.; Kluit, P.; Ferreira-Montenegro, J.; Mulders, M.; Reid, D.; Timmermans, J.; Dam, P.

doi:10.1016/j.physletb.2003.07.032

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…The f 1 (1420) meson was first observed in a pion nucleon interaction in the Lawrence Radiation Laboratory in 1967 [8], and it was confirmed in other experiments with pion beams around the year 1980 [9][10][11]. The f 1 (1420) was also observed in recent experiments in e + e − and J/ψ de-cays [12][13][14]. Though the f 1 (1420) is well established experimentally as a resonance structure, the internal structure of the f 1 (1420) was, untill now, still unclear.…”

Section: Introductionmentioning

confidence: 55%

Productions of f1(1420) in pion and kaon induced reactions

Wang

et al. 2019

Phys. Rev. D

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The f 1 (1420) productions via pion and kaon induced reactions on a proton target are investigated in an effective Lagrangian approach. Two treatments of the t-channel Born term, the Feynman model and the Regge model, are introduced to calculate the total and differential cross sections of the π − p → f 1 (1420)n and K − p → f 1 (1420)Λ reactions. The numerical results indicate that the experimental data of the total cross section of the π − p → f 1 (1420)n reaction can be reproduced in both the Feynman and the Regge models. Based on the parameters determined in the pion induced reaction, the cross sections of the K − p → f 1 (1420)Λ reaction, about which there is little data found in the literature, are predicted in the same beam momentum range. It is found that the line shapes of the total cross section obtained in a kaon induced reaction with two treatments are quite different. The cross sections for both reactions are at an order of magnitude of µb, or larger, at a beam momenta up to 10 GeV/c. The differential cross sections for both pion and kaon induced reactions are also present. It is found that in the Regge model, the t channel provides a sharp increase at extreme forward angles. The results suggest that the experimental study of the f 1 (1420) in the kaon induced reaction on a proton target is as promising as in the pion induced reaction. Such an experimental measurement is also very helpful to clarify the production mechanism of the f 1 (1420).

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Section: Introductionmentioning

confidence: 55%

Productions of f1(1420) in pion and kaon induced reactions

Wang

et al. 2019

Phys. Rev. D

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“…According to the authors, the peak was 'equally likely to be f 1 (1285) or η(1295)'. The structure was attributed to f 1 (1285) because the peak was closer in mass to the PDG value for f 1 (1285) [98]. The L3 experiment studied the KKπ and ηππ final states from γ γ collision [55].…”

Section: Radial Excitationmentioning

confidence: 99%

The case of the pseudoscalar glueball

Masoni

Cicalò

Usai

2006

J. Phys. G: Nucl. Part. Phys.

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Glueballs represent a key requirement of quantum chromodynamics as a non-Abelian field theory. Their search provides one of the strongest motivations for meson spectroscopy. The first glueball candidate was identified in 1980 in the J/Ψ radiative decay. Its discovery actually dates back to 1963 and for four decades about 30 experiments, using six different production mechanisms, were dedicated to studying the pseudoscalar states lying in the 1.4–1.5 GeV/c2 mass region. Today, the presence of two pseudoscalar states and an axial vector can be considered as established (see 2004 edition of the Review of Particle Properties). Assuming that η(1295) is established and the nonet filled, the lower mass pseudoscalar, η(1405), becomes a supernumerary and shows the properties of a non- state. Here, we review the experimental effort related to this long search, which can be considered a sort of paradigm for light-quark spectroscopy.

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“…Finally, production rates of two 1 ++ and 1 +− states, f 1 (1285) and f 1 (1420), were measured at LEP [32]. The corresponding rates for pp interactions at 24 GeV/c are estimated assuming the same f 1 (1285)/ρ 0 and f 1 (1420)/ρ 0 ratios as in LEP.…”

Section: Resonance Production Rates In Pp Interactionsmentioning

confidence: 99%

“…Topological cross-sections, σ n , measured in pp interactions at 32 GeV/c [15] and 24 GeV/c [14], ρ 0 topological cross-sections, σ n (ρ 0 ), measured at 32 GeV/c [10] and ω topological cross-sections at 24 GeV/c, σ n (ω), as defined in the text (all cross-sections are in mb). 32…”

Section: Resonance Production Rates In Pp Interactionsmentioning

confidence: 99%

Finite-size correction to the pionium lifetime due to ω and η′ contributions

Chliapnikov

Ronjin²

2009

J. Phys. G: Nucl. Part. Phys.

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It is shown that for pNi interactions at 24 GeV/c, the fractions of the π ± ω π ∓ and π ± η π ∓ pairs with one pion from the ω and η decays, respectively, at small values of the relative momentum Q 4 MeV/c of pions in the c.m. system of the π + π − pair are f ω = 0.150 ± 0.019 and f η = 0.0102 ± 0.0034. With these values of f ω and f η , the uncertainty in the pionium breakup probability and the corresponding overestimation of the pionium lifetime in the DIRAC experiment at CERN are P br /P br = (3.0 ± 1.0)% and τ/τ = (7.8 ± 2.6)%.

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Measurement of inclusive f1(1285) and f1(1420) production in Z decays with the DELPHI detector

Cited by 7 publications

References 20 publications

Productions of f1(1420) in pion and kaon induced reactions

Productions of f1(1420) in pion and kaon induced reactions

The case of the pseudoscalar glueball

Finite-size correction to the pionium lifetime due to ω and η′ contributions

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