Results 41 to 50 of about 21,627,885 (312)
Excited bottom and bottom-strange mesons in the quark model [PDF]
, 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
Constraining Hadron-quark Phase Transition Parameters within the Quark-mean-field Model Using Multimessenger Observations of Neutron Stars [PDF]
Astrophysical Journal, 2020 We extend the quark mean-field (QMF) model for nuclear matter and study the possible presence of quark matter inside the cores of neutron stars. A sharp first-order hadron-quark phase transition is implemented combining the QMF for the hadronic phase ...
Zhiqiang Miao +3 more
semanticscholar +1 more source
Light-meson masses in an unquenched quark model [PDF]
, 2017 We perform a coupled-channels calculation of the masses of light mesons with the quantum numbers $IJ^{P=-}$, $(I,J)=0,1$, by including $q\bar{q}$ and $(q\bar{q})^2$ components in a nonrelativistic chiral quark model.
Xiaoyun Chen +3 more
semanticscholar +1 more source
Test of lepton universality in beauty-quark decays [PDF]
Nature 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
Pion generalized parton distributions within a fully covariant constituent quark model [PDF]
, 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
Quark matter and quark stars at finite temperature in Nambu–Jona-Lasinio model
European 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
Light-front holographic ρ-meson distributions in the momentum space
Journal 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
Physics Essays, 2018 Current-quark masses are compared to the rest masses allowed by the Helmholtz equation in a polar model. Within the uncertainty of the current u quark mass determination, the current quark mass coincides with the rest mass allowed by the Helmholtz equation in the polar model in accordance with the second root of the zero Neumann function.
openaire +3 more sources
Two-solar-mass hybrid stars: A two model description using the Nambu-Jona-Lasinio quark model [PDF]
, 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]
, 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