2,691 research outputs found
Y-type Flux-Tube Formation in Baryons
For more than 300 different patterns of the 3Q systems, the ground-state 3Q
potential is investigated using SU(3) lattice QCD with
at and at at the
quenched level. As a result of the detailed analyses, we find that the
ground-state potential is well described with so-called
Y-ansatz as , with the accuracy better than 1%.
Here, denotes the minimal value of total flux-tube length. We
also studythe excited-state potential using lattice QCD
with at for more than 100 patterns of the 3Q
systems. The energy gap between and , which physically means the gluonic excitation energy, is found to be
about 1 GeV in the typical hadronic scale. Finally, we suggest a possible
scenario which connects the success of the quark model to QCD.Comment: Talk given at Color Confinement and Hadrons in Quantum Chromodynamics
(Confinement 2003), Saitama, Japan, 21-24 July 2003; 5 pages, 4 figure
Y-type Flux-Tube Formation and Gluonic Excitations in Baryons: From QCD to Quark Model
Using SU(3) lattice QCD, we perform the first systematic study for the
ground-state three-quark (3Q) potential and the 1st
excited-state 3Q potential , {\it i.e.}, the energies of
the ground state and the 1st excited state of the gluon field in the presence
of the static three quarks. From the accurate and thorough calculation for more
than 300 different patterns of 3Q systems, the static ground-state 3Q potential
is found to be well described by the Coulomb plus
Y-type linear potential, {\it i.e.}, Y-Ansatz, within 1%-level deviation. As a
clear evidence for Y-Ansatz, Y-type flux-tube formation is actually observed on
the lattice in maximally-Abelian projected QCD. For more than 100 patterns of
3Q systems, we calculate the 1st excited-state 3Q potential in quenched lattice QCD, and find the gluonic excitation energy to be about 1
GeV. This large gluonic-excitation energy is conjectured to ensure the success
of the quark model for the low-lying hadrons even without gluonic excitations.Comment: Talk given at International Conference on Color Confinement and
Hadrons in Quantum Chromodynamics - Confinement 2003, RIKEN, Japan, 21-24 Jul
200
Re-examining the Educational Significance of Learning Bodily Movement: An Approach Using the Concept of“ Affordance”
This study aims to re-examine the educational significance of learning bodily movement. To realize this goal while considering the related discussions in the previous studies, a potential cue from the concept of affordance developed by Gibson is taken into account. Understanding bodily movement from a perspective related to the concept of affordance generates a notion that learning movement will serve as a proof of using affordances in the environment, which will eventually lead to more options in life in the sense of expanding the possibilities for action. Furthermore, the sense of expanding the possibilities for action is human development, which is something that lasts a lifetime. Simply put, learning movement in itself constitutes a foundation for enriching life and living better, and this further can be recognized as possessing educational significance
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