Results 41 to 50 of about 21,261,020 (311)

Branching fractions of semileptonic D and $$D_s$$Ds decays from the covariant light-front quark model [PDF]

open access: yes, 2017
Based on the predictions of the relevant form factors from the covariant light-front quark model, we show the branching fractions for the $$D (D_s) \rightarrow (P,\,S,\,V,\,A)\,\ell \nu _\ell $$D(Ds)→(P,S,V,A)ℓνℓ ($$\ell =e$$ℓ=e or $$\mu $$μ) decays ...
Hai-Yang Cheng, X. Kang
semanticscholar   +1 more source

Test of lepton universality in beauty-quark decays [PDF]

open access: yesNature Physics, 2021
The standard model of particle physics currently provides our best description of fundamental particles and their interactions. The theory predicts that the different charged leptons, the electron, muon and tau, have identical electroweak interaction ...
L. C. R. Aaij   +499 more
semanticscholar   +1 more source

Measurements of the Production, Decay and Properties of the Top Quark: A Review [PDF]

open access: yes, 2012
With the full Tevatron Run II and early LHC data samples, the opportunity for furthering our understanding of the properties of the top quark has never been more promising.
A. Abulencia   +117 more
core   +2 more sources

Excited bottom and bottom-strange mesons in the quark model [PDF]

open access: yes, 2016
In order to understand the possible $q\overline{q}$ quark-model assignments of the ${B}_{J}(5840)$ and ${B}_{J}(5960)$ recently reported by the LHCb Collaboration, we evaluate mass spectra, strong decays, and radiative decays of bottom and bottom-strange
Q. Lu   +4 more
semanticscholar   +1 more source

An alternative approach to the $\sigma$-meson-exchange in nucleon-nucleon interaction [PDF]

open access: yes, 2007
Through a quantitative comparative study of the properties of deuteron and nucleon-nucleon interaction with chiral quark model and quark delocalization color screening model.
Fan Wang   +5 more
core   +1 more source

Pion generalized parton distributions within a fully covariant constituent quark model [PDF]

open access: yes, 2016
We extend the investigation of the generalized parton distribution for a charged pion within a fully covariant constituent quark model, in two respects: (1) calculating the tensor distribution and (2) adding the treatment of the evolution, needed for ...
C. Fanelli   +4 more
semanticscholar   +1 more source

Light-front holographic ρ-meson distributions in the momentum space

open access: yesJournal of High Energy Physics, 2021
We present the leading-twist quark transverse momentum-dependent parton distribution functions (TMDs) for the spin-1 target, such as the ρ-meson, in the light-front framework.
Satvir Kaur   +2 more
doaj   +1 more source

Two-solar-mass hybrid stars: A two model description using the Nambu-Jona-Lasinio quark model [PDF]

open access: yes, 2016
Hybrid stars with a quark phase described by the Nambu-Jona-Lasinio model are studied. The hadron-quark model used to determine the stellar matter equation of state favors the appearance of quark matter: the coincidence of the deconfinement and chiral ...
R. C. Pereira, P. Costa, C. Providencia
semanticscholar   +1 more source

Spectrum of heavy baryons in the quark model [PDF]

open access: yes, 2015
Single- and double- heavy baryons are studied in the constituent quark model. The model Hamiltonian is chosen as a standard one with two exceptions : (1) The color-Coulomb term depend on quark masses, and (2) an antisymmetric $LS$ force is introduced ...
T. Yoshida   +4 more
semanticscholar   +1 more source

Quark matter and quark stars at finite temperature in Nambu–Jona-Lasinio model

open access: yesEuropean Physical Journal C: Particles and Fields, 2017
We extend the SU(3) Nambu–Jona-Lasinio (NJL) model to include two types of vector interaction. Using these two types of vector interaction in NJL model, we study the quark symmetry free energy in asymmetric quark matter, the constituent quark mass, the ...
Peng-Cheng Chu   +6 more
doaj   +1 more source

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