A broad pseudovector glueball from holographic QCD
Jul 26, 20185 pages
Published in:
- Phys.Lett.B 788 (2019) 431-435
- Published: Jan 10, 2019
e-Print:
- 1807.10164 [hep-ph]
DOI:
- 10.1016/j.physletb.2018.11.043 (publication)
View in:
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Abstract: (Elsevier)
We study the decay of a pseudovector glueball with quantum numbers JPC=1+− , the lightest glueball with spin different from zero or two, in the top–down holographic Witten–Sakai–Sugimoto model. This glueball is dual to the string-theoretic Kalb–Ramond tensor field, which completely fixes all its couplings by gauge invariance and D -brane anomaly inflow. The dominant decay channels are determined by a Chern–Simons-like action for the flavor branes; couplings from the Dirac–Born–Infeld action turn out to be subdominant. While the resulting width is parametrically of order Nc−2λ−1 for Nc colors and 't Hooft coupling λ , when extrapolated to Nc=3 and with λ matched to experimental data, the prediction is that the pseudovector glueball is an extremely broad resonance.Note:
- 6 pages, 1 table; v2: slightly extended discussion, version to appear in Phys.Lett.B
- quantum chromodynamics: holography
- field theory: tensor
- glueball: decay
- pseudovector
- D-brane
- anomaly
- Sakai-Sugimoto model
- Born-Infeld model
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