Manifestation of the a{sub 0}{sup 0}(980)-f{sub 0}(980) mixing in the reaction {pi}{sup -}p{yields}{eta}{pi}{sup 0}n on a polarized target

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.074015· OSTI ID:20705339

Achasov, N N; Shestakov, G N ^[1]

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1. Laboratory of Theoretical Physics, Sobolev Institute for Mathematics, Novosibirsk, 630090 (Russian Federation)

It is argued that the single-spin asymmetry in the reaction {pi}{sup -}p{yields}a{sub 0}{sup 0}(980)n{yields}({eta}{pi}{sup 0}){sub S}n is extremely sensitive to the mixing of the a{sub 0}{sup 0}(980) and f{sub 0}(980) resonances. It is shown that at low momentum transfers (namely, in any one of the intervals 0{<=}-t{<=}0.025,...,0.1 GeV{sup 2}) the normalized asymmetry, which can take the values from -1 to 1, must undergo a jump in magnitude close to 1 in the {eta}{pi}{sup 0} invariant mass region between 0.965 GeV and 1.01 GeV. The strong asymmetry jump is the straightforward manifestation of the a{sub 0}{sup 0}(980)-f{sub 0}(980) mixing. For observing the jump, any very high quality {eta}{pi}{sup 0} mass resolution is not required. The energy dependence of the polarization effect is expected to be rather weak. Therefore, it can be investigated at any high energy, for example, in the range from eight to 100 GeV.

• OSTI ID: 20705339
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A0-980 MESONS
ASYMMETRY
D S MESONS
ENERGY DEPENDENCE
F0-980 MESONS
GEV RANGE
MASS RESOLUTION
MOMENTUM TRANSFER
NEUTRONS
PARTICLE PRODUCTION
PION MINUS REACTIONS
PION-PROTON INTERACTIONS
PIONS MINUS
PIONS NEUTRAL
POLARIZATION
POLARIZED TARGETS
REST MASS
SPIN