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Cited by 401

The DOI matches its Crossref record; 121 of the 121 references it cites were found in a registry or an index.

From controversy to precision on the sigma meson: A review on the status of the non-ordinary f0(500) resonance

Open access
Peláez, José R.·2016·Physics Reports
DOI 10.1016/j.physrep.2016.09.001
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Abstract

The existence and properties of the sigma meson have been controversial for almost six decades, despite playing a central role in the spontaneous chiral symmetry of QCD or in the nucleon-nucleon attraction. This controversy has also been fed by the strong indications that it is not an ordinary quark-antiquark meson. Here we review both the recent and old experimental data and the model independent dispersive formalisms which have provided precise determinations of its mass and width, finally settling the controversy and leading to its new name: $f_0(500)$. We then provide a rather conservative average of the most recent and advanced dispersive determinations of its pole position $\sqrt{s_\sigma}=449^{+22}_{-16}-i(275\pm12)$. In addition, after comprehensive introductions, we will review within the modern perspective of effective theories and dispersion theory, its relation to chiral symmetry, unitarization techniques, its quark mass dependence, popular models, as well as the recent strong evidence, obtained from the QCD $1/N_c$ expansion or Regge theory, for its non ordinary nature in terms of quarks and gluons.

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Metadata

Authors
Peláez, J. R.
Venue
Physics Reports
Publisher
Elsevier BV
Published
2016-11
Volume
658
Pages
1-111
ISSN
0370-1573 (ISSN-L)
DOI
10.1016/j.physrep.2016.09.001
OpenAlex
W3104012012
Cited by
401
References
121
FWCI
25.74
Type
journal article
Language
en
Open access
green

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