Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Signal, A. I."'
Autor:
Signal, A. I., Cao, F. G.
The typical transverse momentum of a quark in the proton is a basic property of any QCD based model of nucleon structure. However, calculations in phenomenological models typically give rather small values of transverse momenta, which are difficult t
Externí odkaz:
http://arxiv.org/abs/2108.12116
Autor:
Signal, A. I.
Publikováno v:
Phys. Rev. D 95, 114010 (2017)
The observed deep inelastic nucleon spin asymmetries $A_{1}^{p,n}$ and the spin dependent quark distributions break SU(6) spin - flavour symmetry. In quark models two mechanisms for breaking SU(6) symmetry are well known: the hyperfine interaction an
Externí odkaz:
http://arxiv.org/abs/1702.05152
There are two mechanisms for the generation of an asymmetry between the strange and anti-strange quark distributions in the nucleon: nonperturbative contributions originating from nucleons fluctuating into virtual baryon-meson pairs such as $\Lambda
Externí odkaz:
http://arxiv.org/abs/1206.1688
Publikováno v:
Chinese Physics C34 (2010) 1414
The difference between the strange and antistrange quark distributions, $\delta s(x)=s(x)-\sbar(x)$, and the combination of light quark sea and strange quark sea, $\Delta (x)=\dbar(x)+\ubar(x)-s(x)-\sbar(x)$, are originated from non-perturbative proc
Externí odkaz:
http://arxiv.org/abs/1104.5592
Autor:
Kitson, A. R., Signal, A. I.
We study the zero point energy of massless scalar and vector fields subject to spheroidal boundary conditions. For massless scalar fields and small ellipticity the zero-point energy can be found using both zeta function and Green's function methods.
Externí odkaz:
http://arxiv.org/abs/1011.4055
Autor:
Signal, A. I.
I review progress in calculating strange quark and antiquark distributions of the nucleon using the meson cloud model. This progress parallels that of the meson cloud model, which is now a useful theoretical basis for understanding symmetry breaking
Externí odkaz:
http://arxiv.org/abs/1004.2813
Publikováno v:
J.Phys.G37:105006,2010
The strange and antistrange quark distributions of the nucleon are less constrained by experimental data than the non-strange quark sea. The combination of light quark sea distributions, $\Delta(x)=\dbar(x)+\ubar(x)-s(x)-\sbar(x)$, originates mainly
Externí odkaz:
http://arxiv.org/abs/0912.0351
Publikováno v:
Phys.Rev.D80:114506,2009
The distribution of gluon fields in hadrons is of fundamental interest in QCD. Using lattice QCD we have observed the formation of gluon flux tubes within 3 quark (baryon) and quark plus antiquark (meson) systems for a wide variety of spatial distrib
Externí odkaz:
http://arxiv.org/abs/0910.0958
The distribution of gluon fields in hadrons is of fundamental interest in QCD. Using lattice QCD we have observed the formation of gluon flux tubes within tri-quark (baryon) systems for a wide variety of spatial distributions of the color sources. In
Externí odkaz:
http://arxiv.org/abs/0806.0644
Autor:
Zuelicke, U., Signal, A. I.
Publikováno v:
Solid State Commun. 144, 529 (2007)
Quantum transport in semiconductor nanostructures can be described theoretically in terms of the propagation and scattering of electron probability waves. Within this approach, elements of a phase-coherent electric circuit play a role similar to quan
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701065