skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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

Abstract

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.

Authors:
;  [1]
  1. Laboratory of Theoretical Physics, Sobolev Institute for Mathematics, Novosibirsk, 630090 (Russian Federation)
Publication Date:
OSTI Identifier:
20705339
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 70; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.70.074015; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Achasov, N N, and Shestakov, G N. 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. United States: N. p., 2004. Web. doi:10.1103/PhysRevD.70.074015.
Achasov, N N, & Shestakov, G N. 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. United States. https://doi.org/10.1103/PhysRevD.70.074015
Achasov, N N, and Shestakov, G N. Fri . "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". United States. https://doi.org/10.1103/PhysRevD.70.074015.
@article{osti_20705339,
title = {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},
author = {Achasov, N N and Shestakov, G N},
abstractNote = {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.},
doi = {10.1103/PhysRevD.70.074015},
url = {https://www.osti.gov/biblio/20705339}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 70,
place = {United States},
year = {2004},
month = {10}
}