1,564 research outputs found
Electromagnetic form factors of the baryon decuplet with flavor SU(3) symmetry breaking
We investigate the electromagnetic form factors of the baryon decuplet within
the framework of the self-consistent chiral quark-soliton
model, taking into account the rotational corrections and the effects
of flavor symmetry breaking. We first examine the valence- and
sea-quark contributions to each electromagnetic form factor of the baryon
decuplet and then the effects of the flavor SU(3) symmetry breaking. The
present results are in good agreement with the recent lattice data. We also
compute the charge radii, the magnetic radii, the magnetic dipole moments and
the electric quadrupole moments, comparing their results with those from other
theoretical works. We also make a chiral extrapolation to compare the present
results with the lattice data in a more quantitative manner. The results show
in general similar tendency to the lattice results. In particular, the results
of the and form factors are in good agreement with those of lattice
QCD.Comment: 29 pages, 15 figures. Comparison with the lattice data was elaborate
Organizational Learning from Extreme Performance Experience: The Impact of Success and Recovery Experience
This paper argues that two different types of a firm’s own extreme performance experiences—success and recovery—and their interactions can generate survival-enhancing learning. Although these types of experience often represent valuable sources of useful learning, several important learning challenges arise when a firm has extremely limited prior experience of the same type. Thus, we theorize that a certain threshold of a given type of experience is required before each type of experience becomes valuable, with low levels of experience harming the organization. Furthermore, we propose that success and recovery experience will interact to enhance each other’s value. These conditions can help overcome learning challenges such as superstitious learning or learning from small samples. We investigate our ideas using a sample of the U.S. commercial banks founded between 1984 and 1998. Our results indicate that both success and recovery experience of a firm generate survival-enhancing learning, but only after a certain level of experience is reached. Furthermore, success and recovery experience enhance each other’s learning value, consistent with the theories that emphasize the importance of richer and contrasting experience in providing useful knowledge. Our framework advances organizational learning theory by presenting a contingent model of the impact of success and recovery experience and their interaction
Quark distribution functions and spin-flavor structures in transitions
Transition generalized parton distributions have emerged as a novel tool for
studying the quantum chromodynamics (QCD) structure of resonances. They provide
an integrated picture of the transition form factors and the transition parton
distribution functions. In this study, we delve into the angular momentum (AM)
properties for the transition and its decomposition into the
orbital angular momentum and the intrinsic spin in the context of the quark
distribution functions. First, we explore the spin-flavor structures within the
framework of both the overlap representations of the three-quark light-cone
wave functions and the large limit of QCD. We then estimate the AM quark
distribution functions for the transition. Our analysis reveals a
substantial flavor asymmetry present in both the orbital angular momentum and
intrinsic spin components.Comment: 15 pages, 3 figure
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