Relations between unnatural exchange amplitudes in the reaction [pi][ital N][r arrow][pi][sup +][pi][sup [minus]][ital N] with transversely polarized target

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.2132· OSTI ID:7060163

Svec, M ^[1]

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1. Physics Department, Dawson College, Montreal, Quebec, H3Z 1A4 (Canada) McGill University, Montreal, Quebec, H3A 2T8 (Canada)

We study pion production [pi][ital N][r arrow][pi][sup +][pi][sup [minus]][ital N] on polarized targets for dipion masses below 1000 MeV where the [pi][sup +][pi][sup [minus]] system is produced predominantly with dipion spins [ital J]=0 ([ital S] wave) and [ital J]=1 ([ital P] wave). We find that pion-exchange amplitudes can be expressed in terms of [ital A][sub 1]-exchange amplitudes and data on polarized targets. Extrapolations of pion-exchange amplitudes to the unphysical region to obtain [pi][pi] scattering phase shifts thus depend on the model for [ital A][sub 1]-exchange amplitudes. The usual assumption that [ital A][sub 1]-exchange amplitudes all vanish is ruled out by the data on polarized targets.

• OSTI ID: 7060163
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:5; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANGULAR MOMENTUM
BARYONS
BOSONS
ELEMENTARY PARTICLES
EXCHANGE INTERACTIONS
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HELICITY
INTERACTIONS
MASS
MESON-BARYON INTERACTIONS
MESON-MESON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHASE SHIFT
PION-NUCLEON INTERACTIONS
PION-PION INTERACTIONS
PIONS
PIONS MINUS
PIONS PLUS
POLARIZED TARGETS
PSEUDOSCALAR MESONS
SCATTERING AMPLITUDES
SPIN
T CHANNEL
TARGETS