The Hadronic Physics Group

at the Physics Department of the College of William and Mary.

We conduct research in experimental nuclear and particle physics, with a focus on the structure and interactions of strongly interacting particles (hadrons). The group consists of four faculty members, two affiliated faculty who are staff scientists at Jefferson Lab, two post-doctoral fellows, ten graduate students, and several undergraduate students.

We are funded by the National Science Foundation, the Department of Energy, and the Jeffress Memorial Trust.

Many of our experiments use the intense 6 GeV electron beam at Jefferson Lab in nearby Newport News; we also do experiments at SLAC, MIT-Bates, and TRIUMF. Members of our group are spokespersons on many of these experiments. An overview of our research program can be found below, including links to more detailed information.

Mailing Address

Department of Physics
P.O. Box 8795
College of William and Mary
Williamsburg, VA 23187-8795

Phone - Area Code
(757)
Fax
(757)221-3540

David S. Armstrong	Professor	221-3489	e-mail	WWW
Todd D. Averett	Associate Professor	221-3534	e-mail	WWW
J. Michael Finn	Professor	221-3514	e-mail	WWW
Keith A. Griffioen	Professor	269-3537	e-mail	WWW
Roger D. Carlini	CEBAF Associate Professor	269-7123	e-mail
Allison F. Lung	Adjunct Professor	269-7446	e-mail	WWW
Robert Feuerbach	Research Scientist	269-7254	e-mail
Sabine Fuchs	Laboratory Technician	221-3551	e-mail	WWW
Klaus Grimm	Research Scientist	221-5522	e-mail	WWW
Nathan Baillie	Graduate Student	221-3547	e-mail
Carissa Capuano	Graduate Student	221-3554	e-mail
Rob Fersch	Graduate Student	269-3558	e-mail
Brian Hahn	Graduate Student	269-3542	e-mail
Joe Katich	Graduate Student	221-3427	e-mail	WWW
Aidan Kelleher	Graduate Student	221-3549	e-mail
Sarah Phillips	Graduate Student	221-1986	e-mail	WWW

Allison Lung is also associate director, 12 GeV project, at Jefferson Lab

Research Program

Our core research program centers on four areas: studies of strange quark form-factors in the nucleon via parity violation, nucleon spin-structure experiments using polarized targets, real photon fixed-target experiments at SLAC, and Qweak, a search for physics beyond the standard model via the weak charge of the proton. Click on the links above to get information on each of these areas.

Additional areas of current research are outlined below.

Selected Additional Areas of Research

Gⁿ_E JLab E93-038	Measurement of the neutron's electric form factor using polarization transfer in electron scattering from the deuteron (Hall C at JLab)	Carlini, Finn, Lung, Crouse, Roche	Details
SAMPLE MIT/Bates	Measurement of the strange magnetic moment of the proton using parity-violating electron scatttering at backward angles. Complementary to JLab parity program.	Averett, Roche, Kramer	Details
TRIUMF program	Muon and pion capture experiments, focussing on weak axial structure of the nucleon.	Armstrong, Clark	Details
RadPhi JLab E94-016	Meson spectroscopy using rare radiative decays of the phi meson (in Hall B at JLab).	Armstrong, Roche, Steiner	Details
CLAS	Nucleon structure and color transparency studies using the CLAS in Hall B at JLab.	Griffioen, Butuceanu	Details

Undergraduate Student Projects

We have a strong record of involving undergraduate students in our research. Faculty members have mentored a large number of undergraduate students, including dozens of senior and honors thesis students, NSF REU students, and other summer students over the last few years.

A partial list of some recent students and projects can be found here.

If you are a student, and are interested in participating in our research, please drop by and talk to one of us!

Selected Recent Publications

Here are a few recent publications from group members, with links to electronic versions. This is far from an exhaustive list, but it should provide an idea of our work.

K.A. Aniol et al., (HAPPEX collaboration)
``Parity-Violating Electron Scattering from ⁴He and the Strange Electric Form Factor of the Nucleon''
Phys. Rev. Lett 96 (2006) 022003 (preprint)

D.S. Armstrong et al., (G0 collaboration)
`` Strange-Quark Contributions to Parity-Violating Asymmetries in the Forward G0 Electron-Proton Scattering Experiment''
Phys. Rev. Lett. 95 (2005)092001 (preprint)

X. Zheng, et al.,
``Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region''
Phys. Rev. C 70 (2004)065207 (preprint)

K. Aniol, et al. (HAPPEX Collaboration),
``Parity-violating electroweak asymmetry in e p scattering''
Phys. Rev. C 69 (2004)065501 (preprint)

X. Zheng, et al. (Hall A Collaboration),
``Precision measurement of the neutron spin asymmetry A₁ⁿ and spin-flavor decomposition in the valence quark region''
Phys. Rev. Lett. 92 (2004)012004 (preprint)

M. Battaglieri, et al., (CLAS collaboration)
`` Photoproduction of the Omega Meson on the Proton at Large Momentum Transfer''
Phys.Rev.Lett. 90 (2003)022002 (preprint)

A more comprehensive list of recent publications from group members can be found here.

Recent Graduates

Here are some graduate students who completed their dissertations recently working with our group:

VINCENT A. SULKOSKY "The Spin Structure of ³He and the neutron at low Q²: A Measurement of the Generalized GDH Integrand"
(Advisor: T.D. Averett),
now Hall A postdoctoral fellow at Jefferson Lab

STEPHANIE LOUISE BAILEY, "Parity Violation in Elastic Electron Scattering: A First Measurement of the Parity-Violating Asymmetry at Q² = 0.631 GeV/c² at Backward Angle"
(Advisor: D.S. Armstrong),
now postdoctoral research fellow in Advanced Techniques for Cancer Imaging, Dept. of Radiology, Stanford U. School of Medicine.

BRYAN J. MOFFIT, "Elastic Scattering of Longitudinally Polarized Electrons from ⁴He: A Measurement of G^s_E at Q² = 0.1 (GeV)²"
(Advisor: D.S. Armstrong),
now postdoctoral fellow with MIT, working at Jefferson Lab

CORNEL BUTUCEANU, Quasi-Elastic Electron Scattering from a High-Momentum Nucleon in Deuterium
(Advisor: K.A. Griffioen),
now postdoctoral fellow, U. of Regina

JEFFREY A SECREST, Measurement of Parity-Violating Electroweak Asymmetries in ep Scattering at 0.1 < Q² < 0.4 (GeV/c)²
(Advisor: A.F. Lung )
now postdoctoral fellow, U. Pennsylvania (SNO group)

KEVIN M KRAMER, The Search for Higher Twist Effects in the Neutron Spin-Structure Function g₂ⁿ(x,Q²)
(Advisor: T.D. Averett)
now postdoctoral fellow, Duke U.

PIBERO DJAWOTHO Measurement of the Neutron (³He) Spin Structure Functions at low Q²: A Connection between the Bjorken and Gerasimov-Drell-Hearn Sum Rule
(Advisor: J.M. Finn)
now postdoctoral fellow, Indiana Univ. Cyclotron Facility (IUCF)

JESSICA H.D. CLARK The Ortho-Para Transition in Muonic Molecular Hydrogen
(Advisor: D.S. Armstrong)
Head of Public Outreach, American Physical Society

HOVANES EGIYAN, Single pi⁺ Electroproduction in the First and Second Resonance Regions Using CLAS
(Advisor: K.A. Griffioen)
now Postdoctoral Fellow, Jefferson Lab

GARY A. RUTLEDGE, Measurement of the Strange Sea of the Proton
(Advisors: D.S. Armstrong and J.M. Finn)
now Postdoctoral Fellow, TRIUMF and U. Manitoba

PAUL M. KING, Precision Measurements of the Proton and Deuteron Polarized Structure Functions
(Advisor: K.A. Griffioen)
now Postdoctoral Fellow, U. Illinois

KRISHNI WIJESOORIYA, First (e,e'p) Measurement of Polarization Transfer in a Complex Nucleus: ¹⁶O.
(Advisor: J.M. Finn)
now Postdoctoral Research Associate, Duke U.

Physics Department
Graduate Studies in Physics at William and Mary
Jefferson Lab

armd@physics.wm.edu
last updated: November 2006