Abstract
On the basis of experimental data from the 6-m spectrometer of the Institute of Theoretical and Experimental Physics (ITEP, Moscow), an amplitude analysis of 40 553 events of the reaction π − p → K S K S n induced by a negatively charged pion of energy 40 GeV is performed over a broad momentumtransfer range by using a new procedure. The results for |t| > 0.1 GeV2 are obtained for the first time. In particular, resonances of mass 1700 and 1900 MeV and width 120 MeV are discovered in the D + wave (there were no such resonances for |t| < 0.1 GeV2). In the region of low momentum transfers, the S wave exhibits a structure that lies in the mass region around 1370 MeV and which requires three resonances for its explanation. Two of these (that of mass 1234 ± 6 MeV and width 47 ± 33 MeV and that of mass 1478 ± 6 MeV and width 119 ± 10 MeV) were found in the studies of A. Etkin et al. [Phys. Rev. D 25, 2446 (1982)] and O.N. Baloshin et al. {Yad. Fiz. 43, 1487 (1986) [Phys. At. Nucl. 43, 959 (1986)]}. The third has a mass of 1389 ± 9 MeV and a width of 30 ± 24 MeV. At high momentum transfers, the S wave is found to feature resonances that have the following parameters: M = 1328 ± 8 MeV and Γ = 237 ± 20 MeV, M = 1440 ± 6 MeV and Γ = 121 ± 15 MeV, and M = 1776 ± 15 MeV and Γ = 250 ± 30 MeV. For the D 0 wave, it is found that, in addition to the well-known resonances f 2, a 2, and f′ 2, there appear the following resonances in this wave: a resonance of mass 2005 ± 12 MeV and width 209 ± 32 MeV and a resonance of mass 2270 ± 12 MeV and width 90 ± 29 MeV at low |t| and a resonance of mass 1659 ± 6 and width 152 ± 18 and a resonance of mass 2200 ± 13 MeV and width 91 ± 62 MeV at high |t|.
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Original Russian Text © V.V. Vladimirsky, V.K. Grigor’ev, I.A. Erofeev, O.N. Erofeeva, Yu. V. Katinov, V.I. Lisin, V.N. Luzin, V.N. Nozdrachev, V.V. Sokolovsky, G.D. Tikhomirov, Yu.P. Shkurenko, 2006, published in Yadernaya Fizika, 2006, Vol. 69, No. 3, pp. 515–531.
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Vladimirsky, V.V., Grigor’ev, V.K., Erofeev, I.A. et al. Analysis of the K S K S system from the reaction π − p → K S K S n at 40 GeV. Phys. Atom. Nuclei 69, 493–509 (2006). https://doi.org/10.1134/S1063778806030124
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DOI: https://doi.org/10.1134/S1063778806030124