Evidence for the production of N∗(2830) in π+-p interactions at 8 GeV/c

Bardadin-Otwinowska, M.; Danysz, M.; Hofmokl, T.; Otwinowski, S.; Piotrowska, H.; Sosnowski, R.; Szeptycka, M.; Wróblewski, A.

doi:10.1016/0031-9163(66)90848-1

Physics Letters

1966

DOI: 10.1016/0031-9163(66)90848-1

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Evidence for the production of N∗(2830) in π+-p interactions at 8 GeV/c

M. Bardadin-Otwinowska

M. Danysz

T. Hofmokl

et al.

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Cited by 3 publications

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Status of the η′ (957) Meson

Upadhyay

1980

Annalen der Physik

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A b s t r a c t . According to the quark model, a singlet with I G J p = o+ois predicted to exist.Expcrinientally observed, the q'(95i) and t,he E(1420) mesons both have the same properties. Howw c r , the J p the 71' meson may be 0-or 2-. Recent experimental results along with some theoretiml disrrissions on the production nnd the decay of the $meson are presented here. Its main decay modes are zzq, z + x -~ (via e'y) and jy. Zastnnd des 7' (957) Mesons l n h n l t s u b e r s i c h t . GemiiB dem Quark-Mode11 wird ein Singuiett mit I G J p = 0+0voraiisgesagt. \Vie bereits experimentell beobachtet ist, besitzen die ~'(957)-und E(1420)-Yesonen dieselben Eigeiwcliaften. Jedocli konnten die Jp-\Vcrte des q'(957)-Mesons 0-oder 2sein. Im folgenden betmchten wir einige nenere experimentelle Ergebnisse, zusammen mit theoretisrhen Vberlegiingen zur Erzcrigung rind Zuni Zerfall des q'Jfesons, mit den hauptsiiehliehen Zerfallskanitlen: nnq, n+.-r-y (via coy) rind jy. Status of the ~'(967) Meson 3 SU(3) Properties in Tcrms of QuarkThe SU(3) may be assumed to be made up of quarks and the properties of multiplets can be derived. The hypothesis of quark was put forward by GELL-MANN and ZWEIG.According to them, there is a basic triplet ql, q2. and q3 of quarks consisting of an isospin singlet, q3. The properties of quarks are given in Table 1. The quarks q are denoted by and antiquarks gbya-

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Status of the η′ (957) Meson

Upadhyay

1980

Annalen der Physik

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Study ofπ+pFour-Prong Interactions from 2.95 to 4.08 GeV/c

et al. 1970

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I n a study of the production mechanism of quasi-two-body final states a t the five incident r' momenta 2.95, 3.2, 3.5, 3.75, and 4.08 GeV/c, approximately 40 000 events with four outgoing charged particles were investigated. The cross sections for the processes r+$ --+ N*+fp, r + p -, N*++w, ?r+$--r N*++v, and?r+p -f AJ*++j'have been measured as a function of the pion energy. The differential cross sections and the decay density-matrix elements are discussed in terms of one-meson-exchange models l~v i t h absorption (OPEA) and with form factor (OPEW)] and Regge model,;. For the N*++p and the N*++w reactions, the joint-decay matrix elements are calculated. The formation of N*(2850) in the direct channel is also investigated.

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Six-Prong Interactions ofπ+Mesons with Protons at 8 GeV/c

et al. 1971

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Evidence for the production of N∗(2830) in π+-p interactions at 8 GeV/c

Cited by 3 publications

References 11 publications

Status of the η′ (957) Meson

Status of the η′ (957) Meson

Study ofπ+pFour-Prong Interactions from 2.95 to 4.08 GeV/c

Six-Prong Interactions ofπ+Mesons with Protons at 8 GeV/c

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