Evidence for a strong, possibly resonant, scalar ρρ interaction

Bettini, A.; Cresti, M.; Limentani, S.; Lorı́a, Alvar; Peruzzo, L.; Santangelo, R.; Bertanza, L.; Bigi, A.; Carrara, R.; Casali, R.; Hart, E. L.; Lariccia, P.

doi:10.1007/bf02720545

Cited by 40 publications

(12 citation statements)

References 3 publications

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“…The f 2 (1565) This state has a long history going back to the 1960's (Bettini 1966;Conforto 1967). In 1990 ASTERIX at LEAR presented evidence for the production of a resonance f 2 (1565) in P-wave pp → π 0 π + π − annihilation in hydrogen gas (May, 1989(May, , 1990a.…”

Section: Extra J P C = 2 ++ Statesmentioning

confidence: 99%

Light-meson spectroscopy

1999

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We survey the current status of light meson spectroscopy. We begin with a general introduction to meson spectroscopy and and its importance in understanding the physical states of Quantum Chromo Dynamics (QCD). Phemenological models of hadron spectroscopy are described with particular emphasis on the constituent quark model and the qualitative features it predicts for the meson spectrum. We next discuss expectations for hadrons lying outside the quark model, such as hadron states with excited gluonic degrees of freedom. These states include so-called hybrids and glueballs, as well as multiquark states. The established meson states are compared to the quark model predictions and we find that most meson states are well described by the quark model. However, a number of states in the light-quark sector do not fit in well, suggesting the existence of hadronic states with additional degrees of freedom. We end with a brief description of future directions in meson spectroscopy.2

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Section: Extra J P C = 2 ++ Statesmentioning

confidence: 99%

Light-meson spectroscopy

1999

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“…The coupled channel analysis shows that the ratio between the KK͞ and ππ couplings of f0(1370) is of the order of 1 [32,33]. Decays of f0(1370) into π + ππ + πand into 4π 0 measured in ππ + ππ + π - [42,43] and into π -4π 0 [44][45][46][47] pbar annihilations at rest in liquid D2 are the dominant feature (well distinct from phase space) in the respective mass plots (see fig.5 left plate from ref. [43] and fig.…”

Section: F0(1370) From Kk͞ and 4 Pion Decays In P͞ Annihilations At Restmentioning

confidence: 97%

Decays of the f₀(1370) scalar glueball candidate in pp Central Exclusive Production (CEP) and in antiproton annihilations at rest

Gastaldi

2018

EPJ Web Conf.

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Decays into π + πof the f0(1370) are the main source of an isolated structure localized between 1.2 and 1.5 GeV in the π + πmass spectrum measured in pp Central Exclusive Production (CEP) at √ =200 GeV at very low four momentum transfer ltl by the STAR experiment. These data confirm in the π + πdecay channel the existence of the f0(1370) as an isolated well identified structure previously observed in K + K -, KsKs, π + ππ + π -, 2π 0 π + πand 4π 0 decays measured in pbar annihilations at rest. The ensemble of these data point at a high gg content of the f0(1370). CEP interactions at higher energies favour production of 0 ++ and 2 ++ mesons. Selection of events with lower ltl at both proton vertices suppresses 2 ++ structures. LHC runs dedicated to pp CEP measurements at low ltl could then provide a unique source of all the low energy scalars. This would make it clear if and where scalar gluonium is resident and the nature (composition in terms of qqbar, qqqbarqbar, qqbar-qqbar and gg) of f0(500), f0(980), f0(1370), f0(1500) and f0(1710).

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“…When f 0 (1710) and f 0 (1770) are replaced by one resonance, the χ 2 /N data increases by 58/167 for J/ψ → γπ 0 π 0 , 8/121 for J/ψ → γK S K S , 50/21 for J/ψ → γηη, or by (58,8,50) in short. When f 0 (2020), f 0 (2200), or f 0 (2330) are removed, the χ 2 increases by (48,6,5); (30,6,1); (23,5,0). In addition, there is a very significant deterioration of the fit to the Dalitz plots for pp annihilation when only one scalar resonance in the 1700 to 1800 MeV range is admitted.…”

Section: The Pwamentioning

confidence: 99%

“…In pp annihilation at rest, annihilation into 3π 0 [26], π 0 ηη [27], π 0 ηη [28], and π 0 K L K L [29] was studied. These data established the existence of the f 0 (1500) resonance; the existence of the f 0 (1370) had been proposed in 1966 [30] but its existence was accepted only after its rediscovery at LEAR in pp [31] and pn annihilation [32,33].…”

Section: Introductionmentioning

confidence: 99%

Scalar isoscalar mesons and the scalar glueball from radiative $J/ψ$ decays

Sarantsev,

Denisenko,

Thoma

et al. 2021

Preprint

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A coupled-channel analysis of BESIII data on radiative J/ψ decays into ππ, K K, ηη and ωφ has been performed. The partial-wave amplitude is constrained by a large number of further data. The analysis finds ten isoscalar scalar mesons. Their masses, widths and decay modes are determined. The scalar mesons are interpreted as mainly SU(3)-singlet and mainly octet states. Octet isoscalar scalar states are observed with significant yields only in the 1500-2100 MeV mass region. Singlet scalar mesons are produced over a wide mass range but their yield peaks in the same mass region. The peak is interpreted as scalar glueball. Its mass and width are determined to M = 1865±25 +10 −30 MeV and Γ = 370±50 +30 −20 MeV, its yield in radiative J/ψ decays to (5.8 ± 1.0) 10 −3 .

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Evidence for a strong, possibly resonant, scalar ρρ interaction

Cited by 40 publications

References 3 publications

Light-meson spectroscopy

Light-meson spectroscopy

Decays of the f₀(1370) scalar glueball candidate in pp Central Exclusive Production (CEP) and in antiproton annihilations at rest

Scalar isoscalar mesons and the scalar glueball from radiative $J/ψ$ decays

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Evidence for a strong, possibly resonant, scalar ρρ interaction

Cited by 40 publications

References 3 publications

Light-meson spectroscopy

Light-meson spectroscopy

Decays of the f0(1370) scalar glueball candidate in pp Central Exclusive Production (CEP) and in antiproton annihilations at rest

Scalar isoscalar mesons and the scalar glueball from radiative $J/ψ$ decays

Contact Info

Product

Resources

About

Decays of the f₀(1370) scalar glueball candidate in pp Central Exclusive Production (CEP) and in antiproton annihilations at rest