Observation of a new IG(JPC)=1−(0++) resonance at 1450 MeV

Amsler, C.; Anisovich, V.V.; 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.; Bugg, D. V.; Burchell, M. J.; Case, T.; Chung, S. U.; Cooper, Anthony R.; 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; Königsman, K.; Kunze, 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.; Salk, J.; Sarantsev, A.; Schäfer, Erich; Schmidt, P.; Spanier, S.; Straβburger, C.; Strohbusch, U.; Suffert, M.; Urner, D.; Völcker, C.; Frank, Werner; Walther, Dirk; Wiedner, U.; Winter, N.; Zoll, J.; Zou, B. S.; Zupančič, Č.

doi:10.1016/0370-2693(94)91044-8

Cited by 119 publications

(34 citation statements)

References 16 publications

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“…(14) Let us note that the first pole is located above the KK threshold while the second pole lies below it and the widths are different by a factor of about two. Similar results with very different widths can be found for solution B obtained in [31] by the Crystal Barrel Collaboration. It can be shown that in the Flatté model the difference of two widths is approximately proportional to the KK coupling constant squared…”

Section: Experimental Input and Model Parameterssupporting

confidence: 86%

Coupled channel study of a0 resonances

Furman

Leśniak

2002

Physics Letters B

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A coupled channel model of the a 0 (980) and a 0 (1450) resonances has been constructed using the separable πη and KK interactions. We have shown that two S-matrix poles corresponding to the a 0 (980) meson have significantly different widths in the complex energy plane. The KK to πη branching ratio, predicted in our model near the a 0 (1450) mass, is in agreement with the result of the Crystal Barrel Collaboration. The KK interaction in the S-wave isovector state is not sufficiently attractive to create a bound a 0 (980) meson.

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Section: Experimental Input and Model Parameterssupporting

confidence: 86%

Coupled channel study of a0 resonances

Furman

Leśniak

2002

Physics Letters B

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“…Operators which transform according to the irreducible representations of O h can then be constructed using the well-known group-theoretical projections given in Eq. (6 Since baryons are fermions, we need only be concerned with the six double-valued irreps of O h . There are four two-dimensional irreps G 1g , G 1u , G 2g , and G 2u , and two four-dimensional irreps H g and H u .…”

Section: Operator Typementioning

confidence: 99%

“…The E852 collaboration [1] reported a signal for a 1 ÿ hybrid meson decaying into with a mass near 1.6 GeV, though the significance of this result has been questioned [2]. Another exotic 1 ÿ candidate at 1.4 GeV has been tentatively identified in the channel by E852 [3], VES [4], KEK [5], and Crystal Barrel [6]. The first observation of a doubly charmed baryon has been reported [7], and evidence for the possible existence of a strangeness S 1 pentaquark state has emerged at SPring-8, JLab, and elsewhere [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Group-theoretical construction of extended baryon operators in lattice QCD

et al. 2005

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The design and implementation of large sets of spatially extended, gauge-invariant operators for use in determining the spectrum of baryons in lattice QCD computations are described. Group-theoretical projections onto the irreducible representations of the symmetry group of a cubic spatial lattice are used in all isospin channels. The operators are constructed to maximize overlaps with the low-lying states of interest, while minimizing the number of sources needed in computing the required quark propagators. Issues related to the identification of the spin quantum numbers of the states in the continuum limit are addressed.

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“…[25], and in the NJL model, as done in the present paper, as sufficient to treat this formula as (almost) model-independent. 2 As discussed above, in the pseudoscalar meson case, this formula reduces to Eq. (15) which is satisfied to an accuracy of better than 1%; it therefore finds its direct experimental confirmation in terms of the pseudoscalar meson mass spectrum.…”

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confidence: 96%

Towards resolution of the scalar meson nonet enigma

Burakovsky

1997

Found Phys

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The new SU(3) nonet mass formula 2M 2 (ss)+3M 2 (nn, I = 1) = 4M 2 (sn)+ M 2 (nn, I = 0) (n = u, d), obtained in our previous paper by using Regge phenomenology, is rederived for the pseudoscalar and scalar mesons in the Nambu-Jona-Lasinio model with instanton-induced interaction and applied to the problem of the correct qq assignment for the scalar meson nonet. The results strongly favor the masses of the scalar isoscalar mostly octet and mostly singlet states in the vicinity of 1.45 GeV and 1.1 GeV, respectively.

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Observation of a new IG(JPC)=1−(0++) resonance at 1450 MeV

Cited by 119 publications

References 16 publications

Coupled channel study of a0 resonances

Coupled channel study of a0 resonances

Group-theoretical construction of extended baryon operators in lattice QCD

Towards resolution of the scalar meson nonet enigma

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