Results 21 to 30 of about 4,580 (118)
The non-perturbative unquenched quark model
EPJ Web of Conferences, 2017 In recent years states in the quarkonium spectrum not expected in the naive quark model have appeared and created a lot of interest. In the theoretical side the study of the effect of meson-meson thresholds in the spectrum have been performed in ...
Entern D.R., Ortega P.G., Fernández F.
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Vector-meson production and vector meson dominance
European Physical Journal C: Particles and Fields, 2021 We consider the fidelity of the vector meson dominance (VMD) assumption as an instrument for relating the electromagnetic vector-meson production reaction $$e + p \rightarrow e^\prime + V + p$$ e + p → e ′ + V + p to the purely hadronic process $$V + p ...
Y.-Z. Xu +5 more
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In-medium Properties of the η′-Meson from Photonuclear Reactions
EPJ Web of Conferences, 2012 Investigations of in-medium properties of the η′-meson are presented. The photoproduction of η′-mesons off 12C, 40Ca, 93Nb and 208Pb nuclei has been measured with the Crystal Barrel/TAPS detector system at the ELSA accelerator in Bonn.
Nanova Mariana
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Meson scattering in a non-minimally Lorentz-violating scalar QED at finite temperature
European Physical Journal C: Particles and FieldsIn this paper we study meson scattering in a non-minimally Lorentz-violating scalar QED at finite temperature. The meson scatterings were investigated in tree level and the finite temperature effects were addressed by using the thermofield dynamics ...
M. C. Araújo, R. V. Maluf, J. Furtado
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Two-index SU(N) theories from one flavor QCD to Steven Weinberg's ππ scattering legacy
Nuclear Physics BI review and improve on how two-index SU(N) gauge-fermion theories help access salient information about the large N vacuum and spectrum of QCD, super Yang Mills and meson-meson scattering.
Francesco Sannino
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Mass and width of $$T_{c\bar{c}}(4020)$$ T c c ¯ ( 4020 ) in the developed Bethe–Salpeter theory
European Physical Journal C: Particles and FieldsIn experiments exotic meson resonance $$T_{c\bar{c}}(4020)$$ T c c ¯ ( 4020 ) lies above the $$D^{*}\bar{D}^{*}$$ D ∗ D ¯ ∗ threshold, and in principle one can not explain $$T_{c\bar{c}}(4020)$$ T c c ¯ ( 4020 ) as a meson-meson bound state because meson-
Xiaozhao Chen +3 more
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Unraveling the pattern of the XYZ mesons
Physics Letters B, 2014 We present a plausible mechanism for the origin of the XYZ mesons in the heavy meson spectra within a standard quark-model picture. We discuss the conditions required for the existence of four-quark bound states or resonances contributing to the heavy ...
J. Vijande, A. Valcarce
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Substantia, 2022 It is shown how Maxwell’s equations for the electromagnetic field with Planck quantisation of allowed modes appears to provide a semiclassical account of nuclear interactions. The mesons emerge as plasmons, collective excitations in an electron positron
Barry W. Ninham +2 more
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The light scalar mesons as tetraquarks
Physics Letters B, 2016 We present a numerical solution of the four-quark Bethe–Salpeter equation for ground-state scalar tetraquarks with JPC=0++. We find that the four-body equation dynamically generates pseudoscalar-meson poles in the Bethe–Salpeter amplitude.
Gernot Eichmann +2 more
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