Prentice, J.D.
PI+ P --> ETA DELTA(1232P33)++
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Study of the Reactions pi+ p --> Delta++ pi0 and pi+ p --> Delta++ eta at 5.45-GeV/c

Bloodworth, I.J. ; Jackson, W.C. ; Merdjanian, H. ; et al.
Nucl.Phys.B 81 (1974) 231-248, 1974.
Inspire Record 1399 DOI 10.17182/hepdata.32198

Results are presented on the quasi-two body reactions π + p → Δ ++ π 0 and π + p → Δ s ++ η and 5.45 GeV/ c . Differential cross sections and Δ ++ spin density matrix elements in the t -channel and s -channel helicity systems are presented and compared with a Regge exchange model and the dual absorptive model.

8 data tables
Table 1

LINEAR BACKGROUND ASSUMED.

Table 2

VALUE OBTAINED FROM 4-PRONG EVENTS USED, I. J. BLOODWORTH ET AL., NP B39, 525 (1972).

Table 3

NORMALIZED TO QUOTED TOTAL CROSS SECTION. NO BACKGROUND SUBTRACTION.

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Delta++ eta and deltaa++ x0 production in pi+ p interactions at 5.45 gev/c and eta-x0 mixing

Bloodworth, I.J. ; Jackson, W.C. ; Prentice, J.D. ; et al.
Nucl.Phys.B 39 (1972) 525-537, 1972.
Inspire Record 75253 DOI 10.17182/hepdata.32954

The production of η and X° mesons has been investigated in four and six prong events from π + p interactions at 5.45 GeV/ c . The cross sections for the quasi two body states Δ ++ η and Δ ++ X° were found to be 0.076±0.013 mb and 0.017±0.006 mb respectively. A comparison of the matrix elements for these reactions yields an η−X° mixing angle different from that predicted by the quadratic mass formula by about 20°, but within 6° of the linear mass formula result.

1 data table
Table 1

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