Increased statistics and observation of the gT, gT′, and gT′' 2++resonances in the Glueball enhanced channel π−p→φφn

Etkin, A.; Foley, K. J.; Hackenburg, R.; Longacre, R. S.; Love, W. A.; Morris, Thomas W.; Platner, E.D.; Saulys, A. C.; Lindenbaum, S. J.; Chan, C.S.; Kramer, M.

doi:10.1016/0370-2693(88)90619-3

Cited by 91 publications

(49 citation statements)

References 11 publications

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“…K and [12]. The initial state for those data is , but no decays are observed, showing that any coupling in these states, hence n " n component, must be small.…”

Section: A Separation Of N N and S S Statesmentioning

confidence: 86%

Light2++and0++mesons

et al. 2012

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“…K and [12]. The initial state for those data is , but no decays are observed, showing that any coupling in these states, hence n " n component, must be small.…”

Section: A Separation Of N N and S S Statesmentioning

confidence: 86%

Light2++and0++mesons

et al. 2012

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“…Therefore, the three states observed at BNL in the reaction − p → n by Etkin et al [83,936] were included as additional states in their discussion. In a recent reanalysis of the BNL data [937], new mass values were given; due to their decay into , the three states f 0 (2120), f 0 (2340), and f 0 (2410) should be discussed as ss states or as glueballs.…”

Section: J P C = 2 ++ and Search For The Tensor Glueballmentioning

confidence: 99%

“…Certainly the G(1590) [82] is closely related to it. A tensor glueball was suggested to be mixed into 3 tensor resonances g T (2010), g T (2300) and g T (2340) [83].…”

Section: A Guide To the Literaturementioning

confidence: 99%

Glueballs, hybrids, multiquarks

2007

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Glueballs, hybrids and multiquark states are predicted as bound states in models guided by quantum chromo dynamics (QCD), by QCD sum rules or QCD on a lattice. Estimates for the (scalar) glueball ground state are in the mass range from 1000 to 1800 MeV, followed by a tensor and a pseudoscalar glueball at higher mass. Experiments have reported evidence for an abundance of meson resonances with 0 −+ , 0 ++ and 2 ++ quantum numbers. In particular, the sector of scalar mesons is full of surprises starting from the elusive and mesons. The a 0 (980) and f 0 (980), discussed extensively in the literature, are reviewed with emphasis on their Janus-like appearance as KK molecules, tetraquark states or qq mesons. Most exciting is the possibility that the three mesons f 0 (1370), f 0 (1500), and f 0 (1710) might reflect the appearance of a scalar glueball in the world of quarkonia. However, the existence of f 0 (1370) is not beyond doubt and there is evidence that both f 0 (1500) and f 0 (1710) are flavour octet states, possibly in a tetraquark composition. We suggest a scheme in which the scalar glueball is dissolved into the wide background into which all scalar flavour-singlet mesons collapse.There is an abundance of meson resonances with the quantum numbers of the . Three states are reported below 1.5 GeV/c 2 whereas quark models expect only one, perhaps two. One of these states, (1440), was the prime glueball candidate for a long time. We show that (1440) is the first radial excitation of the meson.Hybrids may have exotic quantum numbers which are not accessible by qq mesons. There are several claims for J P C = 1 −+ exotics, some of them with properties as predicted from the flux tube model interpreting the quark-antiquark binding by a gluon string. The evidence for these states depends partly on the assumption that meson-meson interactions are dominated by s-channel resonances. Hybrids with non-exotic quantum numbers should appear as additional states. Light-quark mesons exhibit a spectrum of (squared) masses which are proportional to the sum of orbital angular momentum and radial quantum numbers. Two states do not fall under this classification. They are discussed as hybrid candidates.The concept of multiquark states has received revived interest due to new resonances in the spectrum of states with open and hidden charm. The new states are surprisingly narrow and their masses and their decay modes often do not agree with simple quark-model expectations.Lattice gauge theories have made strong claims that glueballs and hybrids should appear in the meson spectrum. However, the existence of a scalar glueball, at least with a reasonable width, is highly questionable. It is possible that hybrids will turn up in complex multibody final states even though so far, no convincing case has been made for them by experimental data. Lattice gauge theories fail to identify the nonet of scalar mesons. Thus, at the present status of approximations, lattice gauge theories seem not to provide a trustworthy guide into unknown territory ...

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“…24 A subsequent PWA analysis on a larger data sample showed that three 2 ++ states were necessary to fit the data. 25 Fermilab FT experiment E623 measured the φφ cross section in the reaction pN → φφX but did not perform a PWA analysis. 26 Given the OZI suppression the φφ channel is believed to be a good place to look for the production of glueballs.…”

Section: Central Production Of the φφ Systemmentioning

confidence: 99%

Fixed target experiments at the Fermilab Tevatron

Gutiérrez

Reyes

2014

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Increased statistics and observation of the gT, gT′, and gT′' 2++resonances in the Glueball enhanced channel π−p→φφn

Cited by 91 publications

References 11 publications

Light2++and0++mesons

Light2++and0++mesons

Glueballs, hybrids, multiquarks

Fixed target experiments at the Fermilab Tevatron

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