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

Title: Nature of the a{sub 0}(980) meson in the light of photon-photon collisions

Abstract

New high-statistics Belle data on the reaction {gamma}{gamma}{yields}{pi}{sup 0{eta}} are analyzed to clarify the two-photon production mechanisms and the nature of the a{sub 0}(980) meson. The obtained solution for the amplitude {gamma}{gamma}{yields}{pi}{sup 0{eta}} is consistent with the chiral theory expectation for the {pi}{eta} scattering length, with the strong coupling of the a{sub 0}(980) to the {pi}{eta}, KK, and {pi}{eta}{sup '} channels, and with a key role of the rescattering mechanisms a{sub 0}(980){yields}(KK+{pi}{sup 0{eta}}+{pi}{sup 0{eta}'}){yields}{gamma}{gamma} in the a{sub 0}(980){yields}{gamma}{gamma} decay. Such a picture argues in favor of the q{sup 2}q{sup 2} nature of the a{sub 0}(980) meson and is in agreement with the properties of its partners, the {sigma}{sub 0}(600) and f{sub 0}(980) mesons, in particular, with those that manifest themselves in {gamma}{gamma}{yields}{pi}{pi}. An important role of the vector meson exchanges in the formation of the nonresonant background in {gamma}{gamma}{yields}{pi}{sup 0{eta}} is also revealed. The preliminary information on the reaction {pi}{sup 0{eta}{yields}{pi}0{eta}} is obtained.

Authors:
;  [1]
  1. Laboratory of Theoretical Physics, S. L. Sobolev Institute for Mathematics, 630090, Novosibirsk (Russian Federation)
Publication Date:
OSTI Identifier:
21409951
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 81; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.81.094029; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; A0-980 MESONS; AMPLITUDES; CHIRALITY; F0-980 MESONS; MATHEMATICAL SOLUTIONS; PARTICLE DECAY; PARTICLE PRODUCTION; PHOTON-PHOTON INTERACTIONS; RESCATTERING; SCATTERING; SCATTERING LENGTHS; STRONG-COUPLING MODEL; VECTOR MESONS; BASIC INTERACTIONS; BOSONS; DECAY; DIMENSIONS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; HADRONS; INTERACTIONS; LENGTH; MATHEMATICAL MODELS; MESONS; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; SCALAR MESONS

Citation Formats

Achasov, N N, and Shestakov, G N. Nature of the a{sub 0}(980) meson in the light of photon-photon collisions. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.81.094029.
Achasov, N N, & Shestakov, G N. Nature of the a{sub 0}(980) meson in the light of photon-photon collisions. United States. https://doi.org/10.1103/PHYSREVD.81.094029
Achasov, N N, and Shestakov, G N. 2010. "Nature of the a{sub 0}(980) meson in the light of photon-photon collisions". United States. https://doi.org/10.1103/PHYSREVD.81.094029.
@article{osti_21409951,
title = {Nature of the a{sub 0}(980) meson in the light of photon-photon collisions},
author = {Achasov, N N and Shestakov, G N},
abstractNote = {New high-statistics Belle data on the reaction {gamma}{gamma}{yields}{pi}{sup 0{eta}} are analyzed to clarify the two-photon production mechanisms and the nature of the a{sub 0}(980) meson. The obtained solution for the amplitude {gamma}{gamma}{yields}{pi}{sup 0{eta}} is consistent with the chiral theory expectation for the {pi}{eta} scattering length, with the strong coupling of the a{sub 0}(980) to the {pi}{eta}, KK, and {pi}{eta}{sup '} channels, and with a key role of the rescattering mechanisms a{sub 0}(980){yields}(KK+{pi}{sup 0{eta}}+{pi}{sup 0{eta}'}){yields}{gamma}{gamma} in the a{sub 0}(980){yields}{gamma}{gamma} decay. Such a picture argues in favor of the q{sup 2}q{sup 2} nature of the a{sub 0}(980) meson and is in agreement with the properties of its partners, the {sigma}{sub 0}(600) and f{sub 0}(980) mesons, in particular, with those that manifest themselves in {gamma}{gamma}{yields}{pi}{pi}. An important role of the vector meson exchanges in the formation of the nonresonant background in {gamma}{gamma}{yields}{pi}{sup 0{eta}} is also revealed. The preliminary information on the reaction {pi}{sup 0{eta}{yields}{pi}0{eta}} is obtained.},
doi = {10.1103/PHYSREVD.81.094029},
url = {https://www.osti.gov/biblio/21409951}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 9,
volume = 81,
place = {United States},
year = {Sat May 01 00:00:00 EDT 2010},
month = {Sat May 01 00:00:00 EDT 2010}
}