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    • CommentRowNumber1.
    • CommentAuthorUrs
    • CommentTimeMar 20th 2020

    beginning to record some references – but nothing else here yet

    v1, current

    • CommentRowNumber2.
    • CommentAuthorUrs
    • CommentTimeMar 25th 2020

    added a few more pointers:

    • J. R. Pelaez, From controversy to precision on the sigma meson: a review on the status of the non-ordinary f 0(500)f_0(500) resonance, Physics Reports 658 (2016) 1 (arXiv:1510.00653)

    • S. S. Afonin, T. D. Solomko, The sigma meson from QCD sum rules for large-N cN_c Regge spectra, Eur. Phys. J. C 76, 678 (2016) (arXiv:1608.08131)

    • S. S. Afonin, T. D. Solomko, The linear radial spectrum of scalar mesons within the QCD sum rules in the planar limit, Eur. Phys. J. C 76, 678 (2016) (arXiv:1608.08131)

    Discussion in holographic QCD:

    On sigma-mesons and omega-mesons mediating baryon interaction, discussed in holographic QCD via D3-D7 brane intersections:

    diff, v2, current

    • CommentRowNumber3.
    • CommentAuthorDavid_Corfield
    • CommentTimeMar 25th 2020

    Why does σ\sigma-meson not feature on the meson page?

    • CommentRowNumber4.
    • CommentAuthorUrs
    • CommentTimeMar 25th 2020
    • (edited Mar 25th 2020)

    The sigma is a curious thing. Not evidently part of the quark model (!) The review

    • J. R. Pelaez, From controversy to precision on the sigma meson: a review on the status of the non-ordinary f 0(500)f_0(500) resonance, Physics Reports 658 (2016) 1 (arXiv:1510.00653)

    has the word “confusing” appear 22 times.

    But at the very least I can add it to the top left of the table of Lorentz/isospin representations. Will do.

    • CommentRowNumber5.
    • CommentAuthorDavid_Corfield
    • CommentTimeMar 25th 2020

    Ha, 22! About 20 ’controversy/-ial’s too.

    • CommentRowNumber6.
    • CommentAuthorUrs
    • CommentTimeMar 25th 2020

    Even with the σ\sigma being elusive, it seems be be uncontroversial that “it” provides the main contribution of the nuclear force between hadrons.

    It’s quite remarkable how many and how basic open questions are being swept under the rug by pretending that “QCD explains nuclear physics”.

    • CommentRowNumber7.
    • CommentAuthorUrs
    • CommentTimeApr 9th 2020

    have now added the rep-theory table of mesons, with the sigma included (typeset in parenthesis…)

    diff, v8, current

    • CommentRowNumber8.
    • CommentAuthorUrs
    • CommentTimeApr 21st 2020
    • (edited Apr 21st 2020)

    I’ll fix the table: the sigma-meson is a Lorentz scalar, not pseudo-scalar.

    diff, v9, current

    • CommentRowNumber9.
    • CommentAuthorUrs
    • CommentTimeSep 18th 2020

    added pointer to today’s

    • Christian S. Fischer, Paul C. Wallbott, Richard Williams, Nico Santowsky, Gernot Eichmann, The σ\sigma-meson: four-quark vs. two-quark components and decay width in a Bethe-Salpeter approach (arXiv:2007.06495)

    diff, v13, current

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