Results 81 to 90 of about 65,037 (303)
Photon propagation in magnetic and electric fields with scalar/pseudoscalar couplings: a new look [PDF]
, 2006 We consider the minimal coupling of two photons to neutral scalar and pseudoscalar fields, as for instance in the case of the Higgs boson and axion, respectively. In this framework, we analyze the photon dispersion relations in the presence of static and
A. Minguzzi +13 more
core +2 more sources
Pseudoscalar—sterile neutrino interactions: reconciling the cosmos with neutrino oscillations [PDF]
, 2016 The Short BaseLine (SBL) neutrino oscillation anomalies hint at the presence of a sterile neutrino with a mass of around 1 eV. However, such a neutrino is incompatible with cosmological data, in particular observations of the Cosmic Microwave Background (
M. Archidiacono +6 more
semanticscholar +1 more source
Decay of charmonium states into a scalar and a pseudoscalar glueball
EPJ Web of Conferences, 2016 In the framework of a chiral symmetric model, we expand a U(4)R × U(4)L symmetric linear sigma model with (axial-)vector mesons by including a dilaton field, a scalar glueball, and the pseudoscalar glueball.
Eshraim Walaa I.
doaj +1 more source
Chiral Lagrangian with higher resonances and flavour $ SU(3) $ breaking
, 1993 A chiral Lagrangian with $ SU(3) $ breaking and higher resonances is proposed. In this model, the $ SU(3) $ breaking structure in vector-pseudoscalar sector is realized with the decay constants of pseudoscalar mesons and the masses of vector mesons used ...
Hayakawa, M., Kurimoto, T., Sanda, A. I.
core +1 more source
Self Interacting Dark Matter in the Solar System [PDF]
, 2007 Weakly coupled, almost massless, spin 0 particles have been predicted by many extensions of the standard model of particle physics. Recently, the PVLAS group observed a rotation of polarization of electromagnetic waves in vacuum in the presence of ...
A. Das +10 more
core +3 more sources
Collider constraints on light pseudoscalars [PDF]
Journal of High Energy Physics, 2018 Abstract We investigate the bounds on light pseudoscalars that arise from a variety of collider searches. Special attention is thereby devoted to the mass regions [3, 5] GeV and [9, 11] GeV, in which a meaningful theoretical description has to include estimates of non-perturbative effects such as the mixing of the pseudoscalar with
Michael Spira +5 more
openaire +4 more sources
Radiative Decay Widths of Ground and Excited States of Vector Charmonium and Bottomonium
Advances in High Energy Physics, 2017 We study the radiative decay widths of vector quarkonia for the process of J/ψ(nS)→ηc(nS)γ and Υ(nS)→ηb(nS)γ (for principal quantum numbers n=1,2,3) in the framework of Bethe-Salpeter equation under the covariant instantaneous ansatz using a 4×4 form of ...
Hluf Negash, Shashank Bhatnagar
doaj +1 more source
The $$\pi f_0(500)$$ π f 0 ( 500 ) decay of the $$a_1(1260)$$ a 1 ( 1260 )
European Physical Journal C: Particles and Fields, 2021 We evaluate the $$a_1(1260) \rightarrow \pi \sigma (f_0(500))$$ a 1 ( 1260 ) → π σ ( f 0 ( 500 ) ) decay width from the perspective that the $$a_1(1260)$$ a 1 ( 1260 ) resonance is dynamically generated from the pseudoscalar–vector interaction and the $$\
R. Molina +3 more
doaj +1 more source
Can the 126 GeV boson be a pseudoscalar?
, 2012 We test the possibility that the newly-discovered 126 GeV boson is a pseudoscalar by examining the correlations among the loop-induced pseudoscalar decay branching fractions to $\gamma\gamma$, $ZZ^*$, $Z\gamma$, and $WW^*$ final states in a model ...
Baradhwaj Coleppa +4 more
core +1 more source
On the mixing of pseudoscalar mesons
Physics Letters B, 1983 Abstract We calculate the mixing between a glueball and qq pseudoscalars (both the ground state and the first radial excitation) in the framework of the MIT bag model. Our results are large, strongly violate SU(3) and are very sensitive to small changes in the parameters of the model.
Donoghue, John, Gomm, Harald
openaire +4 more sources