The distribution of the fundamental constituents, the quarks and gluons, is expected to be different in pions, kaons, and nucleons. However, experimental data are sparse. As a result, there has been persistent doubt about the behaviour of the pion's valence quark structure function at large ...
Determination of the Pion and Kaon Structure Functions nπ = 1.0 ± 0.1 and n K = 2.5 ± 0.6 is obtained, where n is the leading ( 1 - x ) power of the nonstrange-valence-quark distribution. ... W Aitkenhead - 《Phys.rev.lett》 被引量: 9发表: 1980年 Pion and kaon valence-qua...
In contrast with our previous analysis, where we only distinguished between valence-quark, sea-quark, and gluon fragmentation, we are now able to treat all partons independently and to properly incorporate the charm and bottom thresholds. Because of the sizable energy gap between PEP and LEP, ...
The kaon's glue and sea distributions are similar to those in the pion, although the inclusion of mass-dependent splitting functions introduces some differences on the valence-quark domain. This study should stimulate improved analyses of existing data and motivate new experiments sensitive to all $...
Quasi-distribution amplitudes for pion and kaon via the nonlocal chiral-quark model 来自 arXiv.org 喜欢 0 阅读量: 42 作者:Nam,Seung-il 摘要: We investigate the pseudoscalar (PS) meson (π and K) quasi-distribution amplitude (QDA), which is supposed to be an asymptotic analog to the ...
The shape parameter α carries information on the nature of the quark-hadron transition. Namely, lattice QCD calculations [36,37,38] and other theoretical expectations show two important regions of the baryochemical potential (μB) axis of the phase diagram of strongly interacting matter. A phase...
We investigate the unpolarized pion and kaon fragmentation functions using the nonlocal chiral-quark model. In this model the interactions between the quarks and pseudoscalar mesons is manifested nonlocally. In addition, the explicit flavor SU(3) symmetry breaking effect is taken into account in ...
. We present results for pion and kaon production based on the unintegrated parton (gluon, quark, antiquark) distributions. 2. Inclusive cross section for partons The formulae for inclusive quark/antiquark distributions are similar to the formula ...
The neutrino properties of quark matter by calculating the neutrino emissivities and mean free paths are investigated. It is demonstrated that the simple b... N Iwamoto 被引量: 15发表: 1981年 Nuclear reactions in the uppermost Earth atmosphere as a source of the magnetospheric positron radiation...
Non-mesonic Weak Decays of Light Hypernuclei in the Direct Quark and the One-Pion Exchange Mechanisms We study the nonmesonic decay rates of light hypernuclei,Λ4H,Λ4HeandΛ5He.TheΛN→NNtransition is described by the one pion exchange mechanism and the di... T Inoue - American Institut...