Fundamental Interactions at Short Distances Office: 277 Chem-Phys.
Bldg. Phone: 859-257-4083 e-mail: email@example.com
My research interests are focussed on understanding the
structure of nucleons. Nowadays, we believe that nucleons
are made of three fundamental Dirac particles, so called
quarks. These quarks carry 1/3 or 2/3 of the elementary
charge of an electron or positron and have a spin 1/2.
The current distribution of these quarks inside a nucleon
is very complex and complicated. By means of
electron scattering experiments over a large range
of energies (from a few hundred MeV to about 30 GeV)
one can study the electric and magnetic current
distributions. Using polarized electrons (the
spins of the electrons are alligned parallel or
antiparallel to their momentum) and polarized
targets, such as protons, deuterons, or 3He,
one has a tool to investigate new fundamental
properties of the nucleons, such as questions
like: Where does the nucleon gets its spin?
I am collaborating in the Polarized 3He Collaboration
in Hall A and the G0 Collaboration
in Hall C at Jefferson Lab. Recently I joined
a collaboration to improve the limits on
the Electric-Dipole-Moment of the Neutron.
7/10 Prof. of Physics at UKy
7/04 Assoc. Prof. of Physics at UKy
7/99 Asst. Prof. of Physics at UKy
10/96 Res. Asst. Prof. of Physics at UKy
12/93 Sen. Res. Fellow at Caltech
2/91 Postdoc. Fellow at MIT
4/90 Ph.D. in Nuclear Physics at Univ. of Marburg and MPI for Nucl.
Physics (Heidelberg), Germany
4/87 Diploma in Physics at Univ. of
Marburg and MPI for Nucl. Physics (Heidelberg), Germany
Present Graduate Students
Recent Selected Publications
S. Riordan et al., The Jefferson Lab Polarized 3He Collaboration,
"Measurements of the Electric Form Factor of the Neutron up to Q2=3.4 GeV2 using the Reaction 3He->(e->,e'n)pp", Phys. Rev. Lett. 105, 262302 (2010).
"The SNS Neutron EDM Experiment",
Nucl. Phys A, PANIC 2008, 667 (2009).
A. Deur, V. Burkert, J.P. Chen, W. Korsch,
"Determination of the effective strong coupling constant alpha(s,g(1))(Q2) from CLAS spin structure function data",
Phys.Lett. B665, 349 (2008).
P. Solvignon e al., The Jefferson Lab Polarized 3He Collaboration,
"Quark-Hadron Duality in Neutron (He-3) Spin Structure",
Phys.Rev.Lett. 101, 182502 (2008).
D. S. Armstrong et al., The G0 Collaboration,
"Strange Quark Contributions to Parity-Violating Asymmetries in the Forward G0 Electron-Proton Scattering Experiment",
K. Kramer et al.,
"The Q2-Dependence of the Neutron Spin Structure Function gn2 at Low Q2",
"Higher Twists and the Measurments of g2",
AIP Conf.Proc.747:122-125 (2005).
Z.E. Meziani et al.
"Higher Twists and Color Polarizabilities in the Neutron",
A. Deur et al.,
"Experimental Determination of the Evolution of the Bjorken Integral at Low Q2",
M. Amarian et al.,
"Measurement of the Generalized Forward Spin Polarizabilities of the Neutron",
"Nucleon Spin Structure",
Acta Phys.Hung.A21:301-306 (2004).
X. Zheng et al.,
"Precision Measurement of the Neutron Spin Asymmetries and Spin-Dependent Structure Functions in the Valence Quark Region",
M. Amarian et al.,
"Q2 Evolution of the Neutron Spin Structure Moments using a He-3 Target",
D.T. Spayde et al.,
"The Strange Quark Contribution to the Proton's Magnetic Moment",
T.M. Ito et al.,
"Parity Violating Electron Deuteron Scattering and the Proton's Neutral Weak Axial Vector Form-Factor",
X. Zheng et al., The Jefferson Lab Polarized 3He Collaboration,
``Precision Measurement of the Neutron Spin Asymmetry A1n in the
Large xBj Region'',
W. Xu et al, The Jefferson Lab Polarized 3He Collaboration,
"PWIA Extraction of the Neutron Magnetic Form Factor from Quasi-elastic
He-3(pol.)(e(pol.),e') at Q2 = 0.3-(GeV/c)2 to
0.6-(GeV/c)2'", Phys. Rev. C 67, 012201 (2003).
M. Amarian et al., The Jefferson Lab Polarized 3He Collaboration,
"The Q2 Evolution of the Generalized Gerasimov-Drell-Hearn Integral
for the Neutron using a 3He Target''; Phys. Rev. Lett. 89, 242301 (2002).
W. Korsch, "Spin Physics with Polarized 3He'', published in:
Charlottesville 2002, Testing QCD through Spin Observables in Nuclear
Targets, World Scientific, 249-255 (2002).
W. Korsch,``Studies of the Neutron Spin Structure at Jefferson Lab'';
Europ. Phys. J. A 1754, Electron-Nucleus Scattering VII,
Elba International Physics Center, Italy, 2002.