Partial-wave analysis of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mi>−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>system produced in the reaction<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:

Manak, J. J.; Adams, T.; Bishop, J. M.; Cason, N. M.; Иванов, Э. И.; LoSecco, J. M.; Sanjari, A. H.; Shephard, W. D.; Stienike, D. L.; Taegar, S. A.; Thompson, David R.; Chung, S. U.; Danyo, K.; Hackenburg, R.; Olchanski, C.; Weygand, D. P.; Willutzki, H. J.; Dzierba, A.; Gunter, Jeffrey L.; Lindenbusch, R.; Rust, D. R.; Scott, E.; Smith, Paul T.; Sulanke, T.; Teige, S.; Denisov, S. P.; Dorofeev, V.; Kachaev, I.; Lipaev, V. V.; Popov, A.; Ryabchikov, D.I.; Bar‐Yam, Z.; Dowd, J.; Eugenio, P.; Hayek, M.; Kern, W.; King, E.; Shenhav, N.; Bodyagin, V. A.; Kodolova, O.; Korotkikh, V.; Kostin, M.; Ostrovidov, A. I.; Sarycheva, L.; Sinev, N. B.; Vardanyan, I.; Yershov, A. A.; Brown, D. S.; Pedlar, T. K.; Seth, K. K.; Wise, J.; Zhao, Dongxu; Adams, G. S.; Cummings, J. P.; Kühn, J.; Napolitano, J.; Nozar, M.; Smith, J. A.; White, D. B.; Witkowski, M.

doi:10.1103/physrevd.62.012003

Cited by 16 publications

(12 citation statements)

References 18 publications

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“…The lower mass 0 −+ state, η(1405), couples to both a 0 π and KK * , while the higher mass state, η(1475), couples mostly to KK * . Table 18: Properties of the J P C = 0 −+ states from E852 [209]. 6 Gluonic Excitations…”

Section: 6mentioning

confidence: 99%

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The experimental status of glueballs

Credé

Meyer

2009

Progress in Particle and Nuclear Physics

222

206

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a b s t r a c tGlueballs and other resonances with large gluonic components are predicted as bound states by Quantum Chromodynamics (QCD). The lightest (scalar) glueball is estimated to have a mass in the range from 1 to 2 GeV/c 2 ; pseudoscalar and tensor glueballs are expected at higher masses. Many different experiments exploiting a large variety of production mechanisms have presented results in recent years on light mesons with J PC = 0 ++ , 0 −+ , and 2 ++ quantum numbers. This review looks at the experimental status of glueballs. Good evidence exists for a scalar glueball which is mixed with nearby mesons, but a full understanding is still missing. Evidence for tensor and pseudoscalar glueballs are weak at best. Theoretical expectations of phenomenological models and QCD on the lattice are briefly discussed.

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Section: 6mentioning

confidence: 99%

“…Fitted intensity distributions from E852 for the 0 −+ wave[209]: (a) a 0 π intensity, (b) η(ππ) S intensity, and (c) total 0 −+ intensity. A sharp peak at about 1300 MeV/c 2 is visible in (a), consistent with the assumption of η(1295) → a 0 (980)π.…”

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confidence: 99%

The experimental status of glueballs

Credé

Meyer

2009

Progress in Particle and Nuclear Physics

222

206

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“…Another observation came from the radiative decay J/ψ → γηππ from DM2 at Orsay, with hints at a pseudoscalar identification [14,15]. Further evidence came in partial-wave analyses of data from other π − p experiments at KEK [16,17] and Brookhaven [18,19]. Brookhaven Experiment E852 observed the η(1295) along with the f 1 (1285) in the reaction π − p → ηπ + π − n at 8.…”

Section: Introductionmentioning

confidence: 99%

Photoproduction of the $f_1(1285)$ Meson

Dickson,

Schumacher

2016

Preprint

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The f1(1285) meson with mass 1281.0 ± 0.8 MeV/c 2 and width 18.4 ± 1.4 MeV (FWHM) was measured for the first time in photoproduction from a proton target using CLAS at Jefferson Lab. Differential cross sections were obtained via the ηπ + π − , K + K0 π − , and K − K 0 π + decay channels from threshold up to a center-of-mass energy of 2.8 GeV. The mass, width, and an amplitude analysis of the ηπ + π − final-state Dalitz distribution are consistent with the axial-vector J P = 1 + f1(1285) identity, rather than the pseudoscalar 0 − η(1295). The production mechanism is more consistent with s-channel decay of a high-mass N * state, and not with t-channel meson exchange. Decays to ηππ go dominantly via the intermediate a ± 0 (980)π ∓ states, with the branching ratio Γ(a0π (no KK))/Γ(ηππ (all)) = 0.74±0.09. The branching ratios Γ(K Kπ)/Γ(ηππ) = 0.216±0.033 and Γ(γρ 0 )/Γ(ηππ) = 0.047 ± 0.018 were also obtained. The first is in agreement with previous data for the f1(1285), while the latter is lower than the world average.

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“…A long history of confusion surrounds the pseudoscalar meson spectrum [1,2]. Results from previous experiments [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] carried out over the past four decades, including peripheral production with pion beams, pp annihilation, and J/ψ radiative decay, indicate that there may be three isosinglet pseudoscalar states in the narrow mass range from 1250 to 1500 MeV/c 2 . However only two states are expected in the standard J P = 0 − nonet.…”

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confidence: 99%