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Title: On the Possibility of Observing a{sup 0}{sub 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 shown that the spin asymmetry in the reaction {pi}{sup -}p {yields} a{sup 0}{sub 0}(980)n {yields} ({eta}{pi}{sup 0}){sub S} n is highly sensitive to the mixing of the a{sup 0}{sub 0}(980) and f{sub 0}(980) resonances. At low momentum transfers (namely, in any of the intervals 0 {<=} -t {<=} 0.025, ..., 0.1 GeV{sup 2}), the asymmetry normalized in such a way that it takes values between -1 and 1 must undergo a jump close in magnitude to unity in the region of the {eta}{pi}{sup 0} invariant masses between 0.965 and 1.01 GeV. A large jump of the asymmetry is due exclusively to a{sup 0}{sub 0}(980) - f{sub 0}(980) mixing. A very high resolution in the {eta}{pi}{sup 0} invariant mass is not required for observing the jump of the asymmetry. The energy dependence of the polarization effect is expected to be rather weak; therefore, the polarization effect in question can be studied at any high energy--for example, in the range between 8 and 100 GeV.

Authors:
;  [1]
  1. Sobolev Institute of Mathematics, Siberian Division, Russian Academy of Sciences, pr. Akademika Koptyuga 4, Novosibirsk, 630090 (Russian Federation)
Publication Date:
OSTI Identifier:
20692926
Resource Type:
Journal Article
Journal Name:
Physics of Atomic Nuclei
Additional Journal Information:
Journal Volume: 68; Journal Issue: 12; Other Information: Translated from Yadernaya Fizika, ISSN 0044-0027, 68, 2130-2142 (No. 12, 2005); DOI: 10.1134/1.2149086; (c) 2005 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); TN:; Journal ID: ISSN 1063-7788
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; A0-980 MESONS; ASYMMETRY; D S MESONS; ENERGY DEPENDENCE; ETA MESONS; F0-980 MESONS; GEV RANGE; MOMENTUM TRANSFER; PION MINUS REACTIONS; PION MINUS-PROTON INTERACTIONS; PIONS MINUS; PIONS NEUTRAL; POLARIZATION; POLARIZED TARGETS; QUANTUM CHROMODYNAMICS; SPIN

Citation Formats

Achasov, N N, and Shestakov, G N. On the Possibility of Observing a{sup 0}{sub 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., 2005. Web. doi:10.1134/1.2149086.
Achasov, N N, & Shestakov, G N. On the Possibility of Observing a{sup 0}{sub 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/10.1134/1.2149086
Achasov, N N, and Shestakov, G N. Thu . "On the Possibility of Observing a{sup 0}{sub 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/10.1134/1.2149086.
@article{osti_20692926,
title = {On the Possibility of Observing a{sup 0}{sub 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 shown that the spin asymmetry in the reaction {pi}{sup -}p {yields} a{sup 0}{sub 0}(980)n {yields} ({eta}{pi}{sup 0}){sub S} n is highly sensitive to the mixing of the a{sup 0}{sub 0}(980) and f{sub 0}(980) resonances. At low momentum transfers (namely, in any of the intervals 0 {<=} -t {<=} 0.025, ..., 0.1 GeV{sup 2}), the asymmetry normalized in such a way that it takes values between -1 and 1 must undergo a jump close in magnitude to unity in the region of the {eta}{pi}{sup 0} invariant masses between 0.965 and 1.01 GeV. A large jump of the asymmetry is due exclusively to a{sup 0}{sub 0}(980) - f{sub 0}(980) mixing. A very high resolution in the {eta}{pi}{sup 0} invariant mass is not required for observing the jump of the asymmetry. The energy dependence of the polarization effect is expected to be rather weak; therefore, the polarization effect in question can be studied at any high energy--for example, in the range between 8 and 100 GeV.},
doi = {10.1134/1.2149086},
url = {https://www.osti.gov/biblio/20692926}, journal = {Physics of Atomic Nuclei},
issn = {1063-7788},
number = 12,
volume = 68,
place = {United States},
year = {2005},
month = {12}
}