Radiative decay of the [Delta] resonance: Analyzing powers for [pi][sup [minus]][ital [rvec p]][r arrow][gamma][ital n]

Journal Article · Mon Feb 14 04:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.973· OSTI ID:5213345

Stasko, J C; Bassalleck, B; Booth, E C; Chertok, M B; Healey, D; Jacot-Guillarmod, R; Kovash, M A; Mack, D J; Measday, D F; Miller, J P; Moinester, M A; Ottewell, D; Pickar, M A; Weber, P ^[1]

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1. University of New Mexico; Albuquerque; New Mexico 87131 (United States) Boston University; Boston; Massachusetts 02215 (United States) TRIUMF; Vancouver; British Columbia; V6T2A3 (Canada) University of British Columbia; Vancouver; British Columbia; V6T1Z1 (Canada) University of Kentucky; Lexington; Kentucky 40506 (United States) CEBAF; Newport News; Virginia 23606 (United States) Tel Aviv University; 69978 Tel Aviv (Israel) Institut fuer Helenergiephysik; Eidgenoessische Technische Hochschule; CH-5232 Villigen (Switzerland)

The polarized target asymmetry [ital A][sub [ital N]] for [pi][sup [minus]][ital [rvec p]][r arrow][gamma][ital n] has been measured by coincident detection of the [gamma] and the neutron at several angles across the [Delta] resonace energy region. A high-resolution NaI [gamma] spectrometer together with good time-of-flight information for the neutron resulted in excellent separation of this radiative capture reaction from the much higher cross-section charge exchange reaction [pi][sup [minus]][ital [rvec p]][r arrow][pi][sup 0][ital n]. Statistical uncertainties are [Delta][ital A][sub [ital N]]=0.02[minus]0.04, representing a significant improvement over previous results. The new data are discussed in the context of recent theoretical models.

• DOE Contract Number: FG04-88ER40396
• OSTI ID: 5213345
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:7; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
662390 -- Electromagnetic Processes & Properties-- (1992-)
662410 -- Properties of Baryons & Baryon Resonances-- (1992-)
663300 -- Nuclear Reactions & Scattering
General-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
BARYONS
BOSONS
CHARGE-EXCHANGE REACTIONS
CROSS SECTIONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MASSLESS PARTICLES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PHOTONS
PION MINUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
RADIATIVE DECAY
TIME-OF-FLIGHT METHOD