2,287 research outputs found
Polarized quark distributions in nuclear matter
We compute the polarized quark distribution function of a bound nucleon. The
Chiral Quark-Soliton model provides the quark and antiquark substructure of the
nucleon embedded in nuclear matter. Nuclear effects cause significant
modifications to the polarized distributions including an enhancement of the
axial coupling constant.Comment: 5 Pages, 2 Postscript figures, Version to be published in Phys. Rev.
Chiral solitons in nuclei: Electromagnetic form factors
We calculate the electromagnetic form factors of a bound proton. The Chiral
Quark-Soliton model provides the quark and antiquark substructure of the
proton, which is embedded in nuclear matter. This procedure yields significant
modifications of the form factors in the nuclear environment. The sea quarks
are almost completely unaffected, and serve to mitigate the valence quark
effect. In particular, the ratio of the isoscalar electric to the isovector
magnetic form factor decreases by 20% at Q^2=1 GeV^2 at nuclear density, and we
do not see a strong enhancement of the magnetic moment.Comment: 13 pages, 6 figures, Added references and a clearer connection to
experimen
Science with passion and a moral compass
For many years, I have found John Vandermeer’s leadership rewarding to study and follow for his commitment to ecology, evolution, social justice, and teaching. This collection of essays and tributes demonstrates these commitments and his breadth of influence over five decades. When we were graduate students, John’s analysis of geographic variation in a freshwater fish was so superior to anything that had been done before that many of us were compelled to follow his quantitative perspective. His imagination and productivity as a zoology graduate student at Kansas and Michigan marked him as someone to watch, and followers were immediately attracted to his science and his revolutionary spirit.https://deepblue.lib.umich.edu/bitstream/2027.42/153951/1/VandermeerTribute pub.pdf2
Distribution and evolution of Chasmistes (Pisces: Catostomidae) in western North America
http://deepblue.lib.umich.edu/bitstream/2027.42/57132/1/OP696.pd
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