1,021 research outputs found
Effective Kbar N interaction based on chiral SU(3) dynamics
The effective Kbar N interaction based on chiral SU(3) coupled-channel
dynamics is derived and its extrapolation below the Kbar N threshold is studied
in detail. Starting from the coupled-channel scattering equations, we eliminate
the channels other than Kbar N and obtain an effective interaction in the
single Kbar N channel. An equivalent local potential in coordinate space is
constructed such as to reproduce the full scattering amplitude of the chiral
SU(3) coupled-channel framework. We discuss several realistic chiral
SU(3)-based models in comparison to reach conclusions about the uncertainties
involved. It turns out that, in the region relevant to the discussion of deeply
bound Kbar-nuclear few-body systems, the resulting energy-dependent, equivalent
local potential is substantially less attractive than the one suggested in
previous purely phenomenological treatments.Comment: RevTeX4, 16 pages, 15 figures, 5 tables, effect of higher order terms
is discussed, final version to appear in Phys. Rev.
Structures and Transitions in Light Unstable Nuclei
We study the structures of the unstable Be isotopes with the theoretical
method of antisymmetrized molecular dynamics. It is found that various
structures of the excited states appear in the low-energy region of
neutron-rich Be nuclei. Focusing on the 2 clustering, we analyze the
intrinsic structures with the help of the experimental data of Gamow-Teller
transitions.Comment: 8 pages and 4 figure
Deformation of hypernuclei studied with antisymmetirzed molecular dynamics
An extended version of the antisymmetrized molecular dynamics to study
structure of - shell hypernuclei is developed. By using an effective
interaction, we investigate energy curves of Be,
C and Ne as function of nuclear quadrupole
deformation. Change of nuclear deformation caused by particle is
discussed. It is found that the in p-wave enhances nuclear
deformation, while that in s-wave reduces it. This effect is most prominent in
C. The possibility of the parity inversion in Ne
is also examined
CORE MONOGRAPHS IN AGRICULTURAL ECONOMICS: SURVEY REPORT
Teaching/Communication/Extension/Profession,
College Students Helping America
The Corporation has produced the most comprehensive national report ever conducted on college student volunteering in the United States. "College Students Helping America" concludes that college student volunteering increased by approximately 20 percent between 2002 and 2005, as students have become involved in helping their communities. The report presents data on student volunteering and volunteers in an easily accessible format that will be useful to people -- whether experienced researchers, policy makers, or just concerned citizens -- interested in learning more about volunteering in the states. "College Students Helping America" is based on statistics from the U.S. Census Bureau and the Bureau of Labor Statistics. The report includes a state-by-state ranking of college student volunteering
AmeriCorps: Changing Lives, Changing America
AmeriCorps is designed to help strengthen and rebuild communities affected by poverty, impacted by disasters, and marked by crime. From the initial members who served during the "Summer of Safety" in 1994 to the soon-to-be 500,000th member in 2007, AmeriCorps members have been on the front lines of service every day, recruiting and managing volunteers of all ages and backgrounds -- 1.4 million in 2006 alone. Together, AmeriCorps members and the volunteers they mobilize tackle some of our nation's toughest problems: crime, illiteracy, homelessness, gang violence, and drug abuse. They teach and tutor to help students improve academically, mentor children and youth from disadvantaged backgrounds, run after-school programs, reconnect prisoners with mainstream society, care for seniors, and protect the environment. This report examines the results from a longitudinal study of AmeriCorps members and surveys of members, alumni, and the organizations where members served to examine the impacts of national service on members' civic engagement, education, employment, and life skills. Findings reveal that AmeriCorps alumni are more connected to their communities, continue to participate in community activities, and choose public service careers after their service with AmeriCorps
Chiral dynamics and baryon resonances
The structure of baryon resonance in coupled-channel meson-baryon scattering
is studied from the viewpoint of chiral dynamics. The meson-baryon scattering
amplitude can be successfully described together with the properties of the
resonance in the scattering, by implementing the unitarity condition for the
amplitude whose low energy structure is constrained by chiral theorem.
Recently, there have been a major progress in the study of the structure of the
resonance in chiral dynamics. We review the methods to clarify the structure of
the resonance by focusing on the Lambda(1405) resonance.Comment: 6 pages, talk give at 4th International Symposium on Symmetries in
Subatomic Physics (SSP2009), June 2-5, 2009, National Taiwan University,
Taipe
ECONOMIC RESEARCH OF INTEREST TO AGRICULTURE, 1988-1990
This bibliography of Giannini Foundation members' publications, Economic Research of Interest to Agriculture was first issued on May 6, 1951, the eighty-first birthday of A.P. Giannini, and included the Giannini Foundation of Agricultural Economics members' works from 1929 through 1950. The first three issues were compiled and edited by the Giannini Foundation's first librarian, Orpha E. Cummings, 1930-1958. The issues that followed were edited by librarians, Mary Lida Eakin, 1958-1967; Virginia A. Fox, 1967-1980; and Grace Dote, 1970-2001.Teaching/Communication/Extension/Profession,
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