from two sources: (i) a nonperturbative approach, based on QCD sum rules with nonlocal condensates and (ii) a NLO QCD analysis of the CLEO data on Fu03b3u03b3*u03c0(Q2), supplemented by the recent high-precision lattice calculations of the second moment of the pion distribution ...
Now, in order to understand the inner structure of a compact stellar object, the most important step is to know the EoS that indicates the physical behavior of fundamental constituents in the analyzing object. Normally, the EoS is defined as p=f(ρ), where p is the pressure and ρ is th...
We combine the constraints on the pion quark structure available from perturbative QCD, nonperturbative QCD (nonlocal QCD sum rules and light cone sum rules) with the analysis of current data on F_{\pi\gamma\gamma^*}(Q^2), including recent high-precision lattice calculations of the second ...
The starting point in both classical and new superconducting materials is the electronic structure that determines the metallic properties in the normal phase (that is, that above Tc). In this respect, the classical superconductors are well described by band theory and, in some cases, starting fro...
one heavy-quark loop. The charm disconnected diagrams have been reported to be very small [2] in a calculation of the hadronic vacuum polarisation contribution to the muon(g−2)performed on a coarse lattice: less than one percent of the (u,d,s) disconnected contribution. However, the ...
内容提示: arXiv:hep-ph/0611114v1 9 Nov 20069th International Workshop Meson-2006Cracow, 9–13 June 2006Pion quark structure in QCDA. P. Bakulev † and A. V. Pimikov ‡Bogolyubov Lab. Theor. Phys., JINR, Dubna, 141980 Russia† bakulev@theor.jinr.ru; ‡ pimikov@theor.jinr....
structure of the state, are discussed. This analysis is based on proton–proton (pp) collision data, corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV. The LHCb detector72,73is a single-arm forward...
Measurements of the flavor asymmetry of the polarized antiquark distributions in the nucleon, Deltau(x)-Deltad(x), would provide a unique opportunity to discriminate between different models of the role of the chiral structure of the nuc... B Dressler,K Goeke,MV Polyakov,... 被引量: 0发表...
Nevertheless, because it represents the contribution of the channel wave function to the total normalization, the compositeness X˜ i will have an important piece of information on the structure of the resonance. More- over, in Ref. [63], it was claimed that one can formulate a meaningful ...
A schematic illustration of the exclusive quarkonium electroproduction process,, in the dipole picture. On the left panel, the structure of the amplitude and kinematic variables in impact parameter space are depicted while its amplitude squared for theelectroproduction is shown on the right panel ...