Results 51 to 60 of about 57,829 (262)
Production of Pseudoscalar Mesons
Fizika B : a journal of experimental and theoretical physics, 2003 11 pages, 11 figures, contribution to proceedings of "2nd International Conference on Nuclear and Particle Physics with CEBAF at JLab," Dubrovnik, Croatia, 26-31 May ...
Briscoe, W. J. +3 more
openaire +3 more sources
Spectra and decay rates of bb̄ meson using Gaussian wave function
EPJ Web of Conferences, 2015 Using the Gaussian wave function mass spectra and decay rates of bb̄ meson are investigated in the framework of phenomenological quark anti-quark potential (coulomb plus power) model consisting of relativistic corrections to the kinetic energy term.
Rai Ajay Kumar +2 more
doaj +2 more sources
Hidden gauge formalism for the radiative decays of axial-vector mesons [PDF]
, 2008 The radiative decay of the axial-vector resonances into a pseudoscalar meson and a photon is studied using the vector meson Lagrangian obtained from the hidden gauge symmetry (HGS) formalism.
A. Hosaka +8 more
core +2 more sources
Deconfinement and Freezeout Boundaries in Equilibrium Thermal Models
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 In different approaches, the temperature‐baryon density plane of QCD matter is studied for deconfinement and chemical freezeout boundaries. Results from various heavy‐ion experiments are compared with the recent lattice simulations, the effective QCD‐like Polyakov linear‐sigma model, and the equilibrium thermal models.
Abdel Nasser Tawfik +4 more
wiley +1 more source
Radiative decay into $γP$ of the low lying axial-vector mesons [PDF]
Phys.Rev.D77:034017,2008, 2008 We evaluate the radiative decay into a pseudoscalar meson and a photon of the whole set of the axial-vector mesons dynamically generated from the vector-pseudoscalar meson ($VP$) interaction. We take into account tree level and loop diagrams coming from the axial-vector decay into a vector and a pseudoscalar meson.
arxiv +1 more source
Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 In this paper, we investigate the tree‐dominated B¯u,d,s,c∗⟶Vℓ−ν¯ℓ (V=Du,d∗,Ds∗,J/ψ and ℓ = e, μ, τ) decays in the Standard Model with the relevant form factors obtained in the light‐front quark model. These decays involve much more helicity states relative to the corresponding B¯∗⟶Pℓ−ν¯ℓ and B¯⟶Vℓ−ν¯ℓ decays, and moreover, the contribution of ...
Qin Chang +4 more
wiley +1 more source
Pseudoscalar mesons and mixing models [PDF]
Zeitschrift f�r Physik C Particles and Fields, 1981 We take the charmonium state at 2.98 GeV to be the ηc and show that it can be included in quadratic and linear mass matrix mixing models, and also in those having radial excited states, in a way consistent with perturbative QCD. The effect on the models of the Crystal Ball measurement of BR (ι→γη′)/BR(ι→γη) is studied and the ratio is found to depend ...
A. B. Rimmer, F.D. Gault
openaire +2 more sources
Heavy-quark spin symmetry breaking in the Born-Oppenheimer approximation
Journal of High Energy Physics, 2023 Heavy-quark spin symmetry is explicitly broken by the mass splitting between a heavy-light pseudoscalar meson and its vector partner. This fact plays a pivotal role in the physics of states whose mass lies close to the threshold of an open-flavor meson ...
R. Bruschini
doaj +1 more source
The Ground‐State Calculations for Some Nuclei by Mesonic Potential of Nucleon‐Nucleon Interaction
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 The interaction of nucleon‐nucleon (NN) has certain physical characteristics, indicated by nucleon, and meson degrees of freedom. The main purpose of this work is calculating the ground‐state energies of 12H and 24He through the two‐body system with the exchange of mesons (π, σ, and ω) that mediated between two nucleons.
K. M. Hanna +5 more
wiley +1 more source
Evidence for a new pseudoscalar meson
Physics Letters B, 1981 Abstract Performing a PWA of the π − π − π + system over the −t p/p range 0.2 to 0.4 GeV 2 we find evidence for a J P = 0 − , J G =1 − meson of mass 1342 ± 20 MeV and width 220 ±70 MeV decaying into ϵπ. This state is produced by natural parity exchange with a slope similar to that of elastic scattering.
M. Bonesini +13 more
openaire +3 more sources