Observation of f0(1500) decay into KLKL

Abele, A.; Adomeit, J.; Amsler, C.; Armstrong, D. S.; Baker, C.A.; Barnett, B. M.; Batty, C.J.; Benayoun, M.; Berdoz, A.; Beuchert, K.; Bischoff, Stefan; Blüm, P.; Braune, K.; Brose, J.; Bugg, D.V.; Case, T.; Cooper, Anthony R.; Cramer, O.; Crowe, K. M.; Degener, T.; Dietz, H. P.; Djaoshvili, N.; Dombrowski, S. von; Doser, M.; Dünnweber, W.; Engelhardt, D.; Faessler, M.; Giarritta, P.; Hackmann, R.; Haddock, R. P.; Heinsius, F. H.; Herz, M.; Hessey, N. P.; Hidas, P.; Holtzhaußen, C.; Jamnik, D.; Kalinowsky, H.; Kalteyer, B.; Kämmle, B.; Kammel, P.; Kiel, T.; Kisiel, J.; Klempt, E.; Koch, H.; Kolo, Castulus; Kunze, M.; Lakata, M.; Landua, R.; Lüdemann, J.; Matthäy, H.; McCrady, R.; Meier, J.; Meyer, C. A.; Montanet, L.; Noble, A. J.; Ouared, R.; Ould-Saada, F.; Peters, K.; Pinder, C. N.; Pintér, G.; Regenfus, C.; Reißmann, J.; Resag, S.; Roethel, W.; Schäfer, Erich; Schmidt, P.; Scott, I.; Seibert, R.; Spanier, S.; Stöck, H.; Straßburger, C.; Strohbusch, U.; Suffert, M.; Thoma, U.; Tischhäuser, M.; Urner, D.; Völcker, C.; Frank, Werner; Walther, Dirk; Wiedner, U.; Zou, B. S.; Zupančič, Č.

doi:10.1016/0370-2693(96)01059-3

Cited by 51 publications

(37 citation statements)

References 24 publications

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“…This width is close to values found by the Crystal Barrel Group (Ref. 1 ), however the resonance masses obtained in our fits are smaller than their values of about 1500 MeV.…”

supporting

confidence: 90%

“…Mixing of scalar mesons with scalar glueballs is possible; for example the f 0 (1500) resonance, observed by the Crystal Barrel Collaboration inpp annihilation at CERN, was interpreted as a candidate for the lowest scalar glueball. 1 The phenomenology of scalar mesons must include studies of interactions between different mesons produced in the decay channels of scalar mesons. In Ref.…”

mentioning

confidence: 99%

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Phenomenology of Scalar Mesons

Leśniak¹

2000

Quark Confinement and the Hadron Spectrum III

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A separable potential model of three coupled channels ππ, KK and an effective 2π2π has been constructed and applied in the analysis of the isoscalar S-wave ππ and KK phase shifts and inelasticities. A relatively narrow scalar resonance of mass 1400-1460 MeV has been found. This resonance is consistent with the recent CERN observation of an eventual scalar glueball at 1500 MeV. Other resonances at lower energies like a wide σ meson and a narrow f 0 (980) have been confirmed. 1 Fig. 1. Energy dependence of ππ phase shifts and inelasticities: a) fit to "down-flat" data of ref. 5 , thick solid line corresponds to fit A, thin solid line to fit B and dotted line to the 2-channel model fit; b) fit to "up-flat" data of ref. 5 , thick solid line corresponds to fit C, thin solid line to fit D and dotted line to the 2-channel model fit.

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“…This width is close to values found by the Crystal Barrel Group (Ref. 1 ), however the resonance masses obtained in our fits are smaller than their values of about 1500 MeV.…”

supporting

confidence: 90%

mentioning

confidence: 99%

Phenomenology of Scalar Mesons

Leśniak¹

2000

Quark Confinement and the Hadron Spectrum III

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“…Thus we take m σ (µ n ) to be 1470(25) MeV. In addition, the Crystal Barrel collaboration finds an isosinglet mass of 1390(30) MeV [9] from one recent analysis and 1380(40) MeV [16] from another. Mark III finds 1430(40) MeV [17].…”

Section: Mixed Physical Statesmentioning

confidence: 99%

“…In addition, in the state vector for f 0 (1500), the relative negative sign between the ss and nn components will lead, by interference, to a suppression of the partial width for this state to decay to KK. Assuming SU(3) flavor symmetry for the two pseudoscalar decay coupling of the scalar quarkonium states, the total KK rate for f 0 (1500) is suppressed by a factor of 0.39 (16) in comparison to the KK rate for an unmixed ss state. This suppression is consistent, within uncertainties with the experimentally observed suppression.…”

Section: Mixed Physical Statesmentioning

confidence: 99%

“…We find also that f 0 (1500) acquires an nn amplitude with sign opposite to its ss component suppressing, by interference, the state's decay to KK final states. Assuming SU(3) flavor symmetry before mixing for the decay couplings of scalar quarkonium to pairs of pseudoscalars, the KK decay rate of f 0 (1500) is suppressed by a factor of 0.39 (16) in comparison to the rate of an unmixed ss scalar. This suppression is consistent, within uncertainties, with the experimentally observed suppression.…”

Section: Introductionmentioning

confidence: 99%

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