High-statistics study of f0(1500) decay into π0π0

Amsler, C.; Armstrong, D. S.; Augustin, I.; Baker, C.A.; Barnett, B. M.; Batty, C.J.; Beuchert, K.; Birien, P.; Blüm, P.; Bossingham, R.; Braune, K.; Brose, J.; Burchell, M. J.; Case, T.; Chung, S. U.; Cramer, O.; Crowe, K. M.; Degener, T.; Dietz, H. P.; Dombrowski, S. von; Doser, M.; Dünnweber, W.; Engelhardt, D.; Englert, M.; Faessler, M.; Felix, Corinne; Hackmann, R.; Haddock, R. P.; Heinsius, F. H.; Herz, M.; Hessey, N. P.; Hidas, P.; Illinger, P.; Jamnik, D.; Kalinowsky, H.; Kämmle, B.; Kiel, T.; Kisiel, J.; Klempt, E.; Kobel, M.; Koch, H.; Kolo, Castulus; Königsmann, K.; Kunze, M.; Lakata, M.; Landua, R.; Löser, F.; Lüdemann, J.; Matthäy, H.; Merkel, M.; Merlo, J.-P.; Meyer, C. A.; Montanet, L.; Noble, A. J.; Ould-Saada, F.; Peters, K.; Pinder, C. N.; Pintér, G.; Ravndal, S.; Regenfus, C.; Salk, J.; Schäfer, Erich; Schmidt, P.; Seibert, R.; Spanier, S.; Stöck, H.; Straßburger, C.; Strohbusch, U.; Suffert, M.; Thoma, U.; Urner, D.; Völcker, C.; Frank, Werner; Walther, Dirk; Wiedner, U.; Winter, N.; Zoll, J.; Zupančič, Č.

doi:10.1016/0370-2693(94)01515-e

Cited by 130 publications

(63 citation statements)

References 26 publications

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“…This unusual behavior is not understood as far as we know and it serves as a challenge to the existing hadronic models 2 . We are aware that there is a recent N f = 2 dynamical fermion 1 We should note that the Monte Carlo results of these two set of calculations actually agree in lattice units within errors. The difference comes from the fact that Ref.…”

Section: Introductionmentioning

confidence: 79%

“…Partly due to the fact that f 0 (1500), discovered in pp annihilation at LEAR, has decays to ππ, KK, ηη and ηη ′ modes which are not compatible with a simpleqq picture [1] and that the earlier quenched lattice calculations [2] predict the scalar glueball mass to be ∼ 1550 MeV, it has been suggested that f 0 (1500) is primarily a scalar glueball [3]. Furthermore, because of the small production of ππ in f 0 (1710) decay compared to that of KK, it has been thought that f 0 (1710) is primarily ss dominated.…”

Section: Introductionmentioning

confidence: 99%

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Scalar glueball, scalar quarkonia, and their mixing

2006

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The isosinglet scalar mesons f 0 (1710), f 0 (1500), f 0 (1370) and their mixing are studied. We employ two recent lattice results as the starting point; one is the isovector scalar meson a 0 (1450) which displays an unusual property of being nearly independent of quark mass for quark masses smaller than that of the strange, and the other is the scalar glueball mass at 1710 MeV in the quenched approximation. In the SU(3) symmetry limit, f 0 (1500) turns out to be a pure SU(3) octet and is degenerate with a 0 (1450), while f 0 (1370) is mainly an SU(3) singlet with a slight mixing with the scalar glueball which is the primary component of f 0 (1710). These features remain essentially unchanged even when SU(3) breaking is taken into account. We discuss the sources of SU(3) breaking and their consequences on flavor-dependent decays of these mesons. The observed enhancement of ωf 0 (1710) production over φf 0 (1710) in hadronic J/ψ decays and the copious f 0 (1710) production in radiative J/ψ decays lend further support to the prominent glueball nature of f 0 (1710).

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Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Scalar glueball, scalar quarkonia, and their mixing

2006

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“…Previous analyses carried out in 1997-1998 [9,10,11] were based on the experimental data as follows: (1) GAMS data on the S-wave two-meson production in the reactions πp → π 0 π 0 n, ηηn and ηη ′ n at small nucleon momenta transferred, |t| < 0.2 (GeV/c) 2 [12,13]; (2) GAMS data on the ππ S-wave production in the reaction πp → π 0 π 0 n at large momentum transfers squared, 0.30 < |t| < 1.0 (GeV/c) 2 [12]; (3) BNL data on the reaction π − p → KKn [14]; (4) CERN-Münich data on π + π − → π + π − [15]; (5) Crystal Barrel data on pp(at rest, from liquid hydrogen)→ π 0 π 0 π 0 , π 0 π 0 η, π 0 ηη [3,5,16]. Now the experimental basis has much broadened, and additional samples of data are included into the analysis [8] of the 00 ++ wave as follows: (6) Crystal Barrel data on proton-antiproton annihilation in gas: pp(at rest, from gaseous hydrogen)→ π 0 π 0 π 0 , π 0 π 0 η [17], (7) Crystal Barrel data on proton-antiproton annihilation in liquid: pp(at rest, from liquid hydrogen)→ π + π − π 0 , [17]; (8) Crystal Barrel data on neutron-antiproton annihilation in liquid deuterium: np(at rest, from liquid deuterium)→ π 0 π 0 π − , [17]; (9) E852 Collaboration data on the ππ S-wave production in the reaction π − p → π 0 π 0 n at the nucleon momentum transfers squared 0 < |t| < 1.5 (GeV/c) 2 [18].…”

Section: Introductionmentioning

confidence: 99%

Systematics of quark–antiquark states and scalar exotic mesons

Anisovich¹

2004

Phys.-Usp.

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The analysis of the experimental data of Crystal Barrel Collaboration on the pp annihilation in flight with the production of mesons in the final state resulted in a discovery of a large number of mesons over the region 1900-2400 MeV, thus allowing us to systematize quark-antiquark states in the (n, M 2 ) and (J, M 2 ) planes, where n and J are radial quantum number and spin of the meson with the mass M . The data point to meson trajectories in these planes being approximately linear, with a universal slope. The sector of scalar mesons is discussed in more detail, where, on the basis of the recent K-matrix analysis, the nonet classification of quark-antiquark states was performed: in the region below 2000 MeV, two scalar nonets are fixed, that is, the basic one and the nonet of the first radial excitation. In the scalar sector, there are two states with the isospin

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“…Recently this problem attracted new attention after a candidate for the scalar glueball was found at LEAR [2,3]. A characteristic feature of the J P C I G = 0 ++ 0 + channel is that the mixing between different states is strong, so that a connection between the observed resonances and bare states, like quarkonia or glueballs, is nontrivial [4,5].…”

Section: Introductionmentioning

confidence: 99%

Structure of $f_0(980)$ from a coupled channel analysis of $S$ -wave $\pi\pi$ scattering

1998

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A coupled channel model is used to study the nature of the f 0 (980) resonance. It is shown that the existence of two poles close to KK threshold, as found in many data fits and confirmed here, can be reconciled with the KK molecular origin of the f 0 (980). Due to a strong coupling between channels the number of the S-matrix poles close to the physical region in the physical case exceeds the number of bare states introduced in the model.

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High-statistics study of f0(1500) decay into π0π0

Cited by 130 publications

References 26 publications

Scalar glueball, scalar quarkonia, and their mixing

Scalar glueball, scalar quarkonia, and their mixing

Systematics of quark–antiquark states and scalar exotic mesons

Structure of $f_0(980)$ from a coupled channel analysis of $S$ -wave $\pi\pi$ scattering

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