Nature of light scalars through photon-photon collisions

N. N. Achasov; G. N. Shestakov

doi:10.1088/1674-1137/34/6/032

Chinese Physics C> 2010, Vol. 34> Issue(6) : 807-815 DOI: 10.1088/1674-1137/34/6/032

Nature of light scalars through photon-photon collisions

N. N. Achasov ^, ,
G. N. Shestakov

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Abstract：
The surprising thing is that arising almost 50 years ago from the linear sigma model (LSM) with spontaneously broken chiral symmetry, the light scalar meson problem has become central in the nonperturbative quantum chromodynamics (QCD) for it has been made clear that LSM could be the low energy realization of QCD. First we review briefly signs of four-quark nature of light scalars. Then we show that the light scalars are produced in the two photon collisions via four-quark transitions in contrast to the classic P wave tensor qq mesons that are produced via two-quark transitions γγ→qq. Thus we get new evidence of the four-quark nature of these states.

References

[1]

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N. N. Achasov and G. N. Shestakov. Nature of light scalars through photon-photon collisions[J]. Chinese Physics C, 2010, 34(6): 807-815. doi: 10.1088/1674-1137/34/6/032

N. N. Achasov and G. N. Shestakov. Nature of light scalars through photon-photon collisions[J]. Chinese Physics C, 2010, 34(6): 807-815. doi: 10.1088/1674-1137/34/6/032 shu

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Received: 2010-02-05
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沈阳化工大学材料科学与工程学院沈阳 110142

Nature of light scalars through photon-photon collisions

Corresponding author: N. N. Achasov,

Received Date: 2010-02-05

Accepted Date: 1900-01-01

Available Online: 2010-06-05

Abstract:

The surprising thing is that arising almost 50 years ago from the linear sigma model (LSM) with spontaneously broken chiral symmetry, the light scalar meson problem has become central in the nonperturbative quantum chromodynamics (QCD) for it has been made clear that LSM could be the low energy realization of QCD. First we review briefly signs of four-quark nature of light scalars. Then we show that the light scalars are produced in the two photon collisions via four-quark transitions in contrast to the classic P wave tensor qq mesons that are produced via two-quark transitions γγ→qq. Thus we get new evidence of the four-quark nature of these states.

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Nature of light scalars through photon-photon collisions

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