Not signed in (Sign In)

Not signed in

Want to take part in these discussions? Sign in if you have an account, or apply for one below

  • Sign in using OpenID

Site Tag Cloud

2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry book bundles calculus categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration foundation foundations functional-analysis functor gauge-theory gebra geometric-quantization geometry graph graphs gravity grothendieck group group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory integration integration-theory k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nforum nlab noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pages pasting philosophy physics pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry scheme schemes set set-theory sheaf sheaves simplicial space spin-geometry stable-homotopy-theory stack string string-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal variational-calculus

Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to nForum
If you want to take part in these discussions either sign in now (if you have an account), apply for one now (if you don't).
    • 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