Results 101 to 110 of about 9,941 (223)
The case of the pseudoscalar glueball
, 2006 Glueballs represent a key requirement of quantum chromodynamics as a non-Abelian field theory. Their search provides one of the strongest motivations for meson spectroscopy. The first glueball candidate was identified in 1980 in the J/Psi radiative decay.
USAI, GIANLUCA, Masoni A, Cicalo C
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Mass Spectra, Radii, and Decay Widths of Toponium
Advances in High Energy Physics, Volume 2026, Issue 1, 2026.In this work, the radial Schrodinger equation with a nonrelativistic quark potential model (NRQPM) is solved numerically by employing the shooting method. Calculated numerical wave functions (or solutions) are used to compute the masses, root mean square (RMS) radii, E1, M1 radiative transition widths, annihilation decay widths, and branching ratios of
Nosheen Akbar +3 more
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Pseudoscalars in the charmonium model
Zeitschrift f�r Physik C Particles and Fields, 1980 We take the recently found charmonium state at 2.976 GeV to be the ηc and show that it can be included in a charmonium model with relativistic corrections which reproduces the s-wave spectrum, the leptonic widths Γ(V→e+ e−) and the p-wave splittings. The upsilon spectrum is discussed as are the effects of radial and pseudoscalar mixing.
A. Bradley, F. D. Gault
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Pseudoscalar portals into the dark sector
, 2016 I will consider scenarios where dark matter interacts with Standard Model states via the exchange of a light pseudoscalar. While there are typically only weak constraints from direct dark matter searches, the pseudoscalar mediator will induce new ...
Kahlhoefer, Felix
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Relativistic corrections to the pair Bc-meson production in e+e− annihilation
Nuclear Physics B, 2016 Relativistic corrections to the pair Bc-meson production in e+e−-annihilation are calculated. We investigate a production of pair pseudoscalar, vector and pseudoscalar+vector Bc-mesons in the leading order perturbative quantum chromodynamics and ...
A.A. Karyasov +2 more
doaj +1 more source
European Physical Journal C: Particles and Fields, 2020 In this paper we consider very weakly interacting and ultra light scalar and pseudoscalar dark matter candidates. We show that quantum gravity has important implications for such models and that the masses of the singlet scalar and pseudoscalar fields ...
Xavier Calmet, Folkert Kuipers
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Advanced Science, Volume 12, Issue 31, August 21, 2025.Precise tuning of interlayer magnetic coupling in two‐dimensional bilayers enables control over altermagnetic and PT‐symmetric antiferromagnetic phases. This dual‐phase platform yields two intrinsic Hall responses: a Berry curvature–driven linear anomalous Hall effect and a quantum metric–induced second‐order nonlinear anomalous Hall effect ...
Zhenning Sun +5 more
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Photon-pseudoscalar coupling from non-linear pseudoscalar oscillations
Journal of Physics G: Nuclear and Particle PhysicsAbstract In this letter, we investigate how \emph{effective self-interactions} of an ultralight \emph{CP-odd pseudoscalar} dark-matter field modify axion-electrodynamics magnetogenesis. Concretely, to capture the leading anharmonicity of the background oscillations, we add a quartic term $\frac{1}{4}\lambda\phi^{4}$ in a controlled ...
mohammad ali naim +2 more
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Internal symmetry implications of the Veneziano model in pseudoscalar-pseudoscalar scattering
Nuclear Physics B, 1969 Abstract The leading order Veneziano model amplitudes for ( J P ) 0 − × 0 − → 0 − × 0 − scattering ∗∗ constrained by the absence of “exotic” resonances, is shown to predict the coupling constant relation of SU(3) coupled with the quark-model/SU(6) ideal singlet-octet mixing in the 1 − , 2 + , nonets.
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A Taste of Dark Matter: Flavour Constraints on Pseudoscalar Mediators [PDF]
, 2014 Dark matter interacting via the exchange of a light pseudoscalar can induce observable signals in indirect detection experiments and experience large self-interactions while evading the strong bounds from direct dark matter searches.
Kahlhoefer, Felix +12 more
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