Results 41 to 50 of about 27,828 (268)

Decay of the pseudoscalar glueball into vector, axial-vector, scalar and pseudoscalar mesons

European Physical Journal C: Particles and Fields, 2023
We resume the investigation of the ground-state pseudoscalar glueball, $$J^{PC}=0^{-+}$$ J PC = 0 - + , by computing its two- and three-body decays into vector and axial-vector quark-antiquark meson fields additional to scalar and pseudoscalar mesons ...
Walaa I. Eshraim
doaj   +1 more source

Pseudoscalar mass effects in the decays of τ with three pseudoscalar mesons [PDF]

Physical Review D, 1994
We study the effects of non-vanishing pseudoscalar masses in $ $ decays into three mesons. The hadronic matrix elements are obtained by using the generalized structure of the chiral currents with nonvanishing pseudoscalar masses and implementing the low-lying resonances in the different channels.
Decker, Roger, Finkemeier, Markus, Mirkes, Erwin   +2 more
openaire   +3 more sources

QUARK STRUCTURE OF PSEUDOSCALAR MESONS [PDF]

International Journal of Modern Physics A, 2000
I review to which extent the properties of pseudoscalar mesons can be understood in terms of the underlying quark (and eventually gluon) structure. Special emphasis is put on the progress in our understanding of η–η′ mixing. Process-independent mixing parameters are defined, and relations between different bases and conventions are studied.
openaire   +2 more sources

Pseudoscalar meson and heavy vector meson scattering lengths [PDF]

Physical Review D, 2011
We have systematically studied the S-wave pseudoscalar meson and heavy vector meson scattering lengths to the third order with the chiral perturbation theory, which will be helpful to reveal their strong interaction. For comparison, we have presented the numerical results of the scattering lengths (1) in the framework of the heavy meson chiral ...
Liu, Zhan-Wei, Liu, Yan-Rui, Liu, Xiang, Zhu, Shi-Lin   +3 more
openaire   +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, Muhammad Maher, A. H. El-Kateb, Sara Abdelaziz, Jajati K. Nayak   +4 more
wiley   +1 more source

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, Devlani Nayneshkumar, Kher Virendrasinh H.   +2 more
doaj   +2 more sources

Soft two-meson-exchange nucleon-nucleon potentials. I. Planar and crossed-box diagrams [PDF]

, 1996
Pion-meson-exchange nucleon-nucleon potentials are derived for two nucleons in the intermediate states. The mesons we include are (i) pseudoscalar mesons: $\pi, \eta, \eta'$; (ii) vector mesons: $\rho, \omega, \phi$; (iii) scalar mesons: $a_{0}(980 ...
A. Klein, C. Ordóñez, D.O. Riska, E. Salpeter, F. Fernández, F.E. Low, F.J. Gilman, H. Harari, J.L. Friar, K. Holinde, K.A. Brueckner, L. Durand, L. van Hove, M. Taketani, M.M. Lévy, M.M. Lévy, M.M. Nagels, P.M.M. Maessen, R. Dolen, R.B. Wiringa, S. Nussinov, S. Nussinov, S. Takeuchi, S. Weinberg, S. Weinberg, S.C. Pieper, Th. A. Rijken, Th.A. Rijken, Th.A. Rijken, Th.A. Rijken, Th.A. Rijken, V. G. J. Stoks, V. Stoks, V.G.J. Stoks, V.G.J. Stoks, Yu.A. Simonov   +35 more
core   +3 more sources

NONLEPTONIC DECAYS OF CHARMED MESONS INTO TWO PSEUDOSCALAR MESONS [PDF]

Modern Physics Letters A, 1993
We investigate the nonleptonic decay of charmed meson into two pseudoscalar mesons using the vector-dominance model, and compare the results with those obtained from the factorization model. In particular, we discuss the role of the annihilation diagrams in the two models.
Das, Ashok, Mathur, Vishnu
openaire   +2 more sources

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, Xiao-Lin Wang, Jie Zhu, Xiao-Nan Li, Roelof Bijker   +4 more
wiley   +1 more source

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