Study of the reaction p + p $Yields$ $delta$$sup ++$(1236) + X$sup 0$ at 205 GeV/c

Journal Article · Mon Sep 01 04:00:00 EDT 1975 · Phys. Rev., D, v. 12, no. 5, pp. 1260-1271

OSTI ID:4123669

Barish, S J; Derrick, M; Musgrave, B; Schultz, P; Whitmore, J; Engelmann, R; Kafka, T; Pratap, M; Field, R D

We have studied inclusive $delta$$sup ++$(1236) production for abs. value (t/sub p$delta$) <1.0 (GeV/c)$sup 2$ in a 50000 picture exposure of the 30- inch hydrogen bubble chamber to a 205 GeV/c proton beam. The inclusive $delta$$sup ++$ cross section for one hemisphere in the center-of-mass system is (1.30 +- 0.14) mb. The mean charged multiplicity of the system recoiling off the $delta$$sup ++$ is in agreement with that for laboratory $pi$$sup -$p interactions at the same energy in the center-of-mass frame. The inclusive $delta$$sup ++$ production is compared to inclusive lambda$sup 0$ and proton production in the same experiment. The connection between $delta$$sup ++$ production and diffraction is discussed. We find that not all $delta$$sup ++$ come from the decay of a diffractively-produced state. The P/subT/$sup 2$ distribution for the $delta$$sup ++$ has a slope of (10.5 +- 0.9) (GeV/c)$sup -2$ for P/sub T/$sup 2$ approximately-less-than0.2 (GeV/c)$sup 2$. This slope, together with the decay angular distribution of the $delta$$sup ++$ at small momentum transfer, suggests a strong pion-exchange contribution to the inclusive process. We compare the data to the expectation of a triple-Regge model with rho- and $pi$-exchange contributions. (AIP)

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• NSA Number: NSA-33-010385
• OSTI ID: 4123669
• Journal Information: Phys. Rev., D, v. 12, no. 5, pp. 1260-1271, Journal Name: Phys. Rev., D, v. 12, no. 5, pp. 1260-1271; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

*DELTA-1236 RESONANCES-- PARTICLE PRODUCTION
*PROTON-PROTON INTERACTIONS-- CROSS SECTIONS
641003*
BOSON-EXCHANGE MODELS
CHARGE DISTRIBUTION
CRYOGENIC BUBBLE CHAMBERS
DIFFRACTION MODELS
GEV RANGE 100-1000
INCLUSIVE INTERACTIONS
LINEAR MOMENTUM TRANSFER
MULTIPLICITY
N64130* --Physics (High Energy)--Particle Interactions &amp; Properties (Experimental)--Strong (Baryon-induced)
PARTICLE RAPIDITY
PIONS
REACTION KINETICS
REGGE POLES
TRANSVERSE MOMENTUM