Caso, C.
PI+ P --> A2(1320)0 DELTA(1232P33)++
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Diffractive and Nondiffractive A1, A3 and A4 Production in pi+ p Interactions at 15-GeV/c

Baltay, C. ; Cautis, C.V. ; Kalelkar, M. ;
Phys.Rev.Lett. 39 (1977) 591, 1977.
Inspire Record 5461 DOI 10.17182/hepdata.20969

We have studied the spin-parity structure of the 3π system produced opposite a proton or Δ++ in π+p interactions at 15 GeV/c. Our results suggest that the broad enhancement at 1.1 GeV, traditionally associated with the A1, does not have the properties usually associated with a resonant state. We obtain similar results for the A3 and A4 enhancements.

1 data table
Table 1

No description provided.


Production of A20 and omega-prime (1675) in the Reaction pi+ p --> Delta++ pi+ pi- pi0 at 15-GeV/c

Baltay, C. ; Cautis, C.V. ; Kalelkar, M. ;
Phys.Rev.Lett. 40 (1978) 87, 1978.
Inspire Record 5845 DOI 10.17182/hepdata.37296

We present the results of a detailed study of ω′(1675) production in the reaction π+p→Δ++π+π−π0 from a high-statistics bubble-chamber experiment at 15 GeV/c. We have measured the mass, width, and cross section as well as differential cross section and spin density matrix elements and compare then to A20 production in the same reaction. We show clear evidence for the resonant phase increase of the 3− (ρπ)fI=0 amplitude with ω′(1675) production.

4 data tables
Table 1

No description provided.

Table 2

NOTE THAT THE SCALES FOR THE DIFFERENTIAL CROSS SECTION ARE WRONG IN THE PUBLISHED FIGURE.

Table 3

No description provided.

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