Study of diffraction dissociation in 19 and 28 GeV/c pd interactions

Journal Article · Fri Aug 01 04:00:00 EDT 1975 · Phys. Rev., D, v. 12, no. 3, pp. 673-680

OSTI ID:4158856

Hanlon, J; Panvini, R; Waters, J; Webster, M; Morris, T W

The reaction pd $Yields$ p)p$pi$$sup -$p is studied at 19 and 28 GeV/c with data from the Brookhaven National Laboratory 80-in. deuterium-filled bubble chamber. In addition, a separate study is made of the low-momentum pion spectra in selected low-multiplicity events presumed to be associated with either of two isospin-conjugate modes of deuteron fragmentation by a 28-GeV/c beam proton. Our results from these complementary studies are that low-multiplicity channels are dominantly of a diffractive nature; however, significant differences seen in the mass spectra and angular correlations in the slow p$pi$$sup -$ between the 19- and 28-GeV/c data indicate that asymptotic behavior has not been reached, as least at 19 GeV/c. Neither s- nor t-channel helicity conservation is seen in the excitation of the target neutron into a low-mass p$pi$$sup -$ system. The N* (1.4) of missing-mass experiments is shown to be a superposition of nucleon-pion and nucleon--two-pion states.

• Research Organization: Vanderbilt University, Nashville, Tennessee 37235
• NSA Number: NSA-33-004130
• OSTI ID: 4158856
• Journal Information: Phys. Rev., D, v. 12, no. 3, pp. 673-680, Journal Name: Phys. Rev., D, v. 12, no. 3, pp. 673-680; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

*PROTON-DEUTERON INTERACTIONS-- DIFFRACTION MODELS
641003*
GEV RANGE 10-100
MASS SPECTRA
MULTIPLICITY
N*RESONANCES
N64130* --Physics (High Energy)--Particle Interactions & Properties (Experimental)--Strong (Baryon-induced)
PIONS MINUS
PROTONS