417 research outputs found
Magnetic moments of exotic pentaquark baryons
In this talk, we present our recent investigation on the magnetic moments of
the exotic pentaquark states, based on the chiral quark-soliton model, all
relevant intrinsic parameters being fixed by using empirical data.Comment: 5 pages, 1 figure, a talk presented at the 10th International
Conference on Baryons (Baryons04), Palaiseau, October 25-29, 200
Automated Retrieval of Non-Engineering Domain Solutions to Engineering Problems
Organised by: Cranfield UniversityBiological inspiration for engineering design has occurred through a variety of techniques such as creation
and use of databases, keyword searches of biological information in natural-language format, prior
knowledge of biology, and chance observations of nature. This research focuses on utilizing the reconciled
Functional Basis function and flow terms to identify suitable biological inspiration for function based design.
The organized search provides two levels of results: (1) associated with verb function only and (2) narrowed
results associated with verb-noun (function-flow). A set of heuristics has been complied to promote efficient
searching using this technique. An example for creating smart flooring is also presented and discussed.Mori Seiki – The Machine Tool Compan
Meson twist-4 parton distributions in terms of twist-2 distribution amplitudes at large Nc
We show that in the large N_c limit four-quark twist-4 distributions in the
pion can be expressed in terms of twist-2 pion distribution amplitude. This
allows us to compute the isospin-2 structure function of the pion
F_2^{I=2}(x_B) in the large N_c limit. The method can be easily applied to
other mesons as well.Comment: 6 pages, one figur
Relations between generalized and transverse momentum dependent parton distributions
Recent work suggests non-trivial relations between generalized parton
distributions on the one hand and (naive time-reversal odd) transverse momentum
dependent distributions on the other. Here we review the present knowledge on
such type of relations. Moreover, as far as spectator model calculations are
concerned, the existing results are considerably extended. While various
relations between the two types of parton distributions can be found in the
framework of spectator models, so far no non-trivial model-independent
relations have been established.Comment: 25 pages, 9 figures; Eq. (B17) and typos corrected, identical with
journal versio
Photon Generalized Parton Distributions
We present a calculation of the generalized parton distributions of the
photon using overlaps of photon light-front wave functions.Comment: Talk given at LightCone 2011, 4 pages, 3 figure
Exotic and nonexotic magnetic transitions in the context of the SELEX and GRAAL experiments
We calculate magnetic transition moments in the chiral quark-soliton model,
with explicit SU(3)-symmetry breaking taken into account. The dynamical model
parameters are fixed by experimental data for the magnetic moments of the
baryon octet and from the recent measurements of mass. Known
magnetic transition moments , are
reproduced and predictions for other octet-decuplet and octet-antidecuplet
transitions are given. In particular recently
constrained by SELEX is shown to be below . The recent GRAAL data
on photoproduction off the nucleon are explained in terms of a new
narrow antidecuplet neutron-like resonance.Comment: 14 pages, 9 figures. Final version accepted for publication in
Phys.Rev.
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