# Presentation: 468333

## Jefferson Laboratory Theory Group

**Science and Technology Review**
- June 25, 2003
**Rocco Schiavilla**
**Interim Theory Group Leader**

- People
- Science:	Research program (broad overview)
- 	Selection of recent results
- 	Research productivity
- Support for JLab experimental program(s): 	current status
- 								future opportunities
- Mentoring postdocs and graduate students
- Summary
- Appendices: 	Profiles of senior staff
- 			N* analysis center pre-proposal
- 		List of publications in 02

- 4.5 full-time staff (4.5 FTE)
- Robert Edwards 	*(lattice gauge theory)*
- Franz Gross*#*
- David Richards  	*(lattice gauge theory)*
- Distinguished Visiting Fellow: Yuri Simonov (ITEP), Oct 01-Apr 02
-                                              	 Stan Brodsky (SLAC), Jan 03-Jun 03
-                                                     Barry Holstein (UMass), Jan 04-Jun 04
- Theory Group Leader (to be filled, R. Schiavilla acting)
- 7 staff with joint appointments (3.5 FTE)
- Ian Balitsky (ODU)				Winston Roberts (ODU)
- Jose Goity (Hampton)				Rocco Schiavilla (ODU)
- Anatoly Radyushkin (ODU)			Marc Vanderhaeghen (W&M)
- 						Wally Van Orden (ODU)
*#* *1/2 time at JLab, retired from W&M*

**JLab Theory Group: Senior Staff**

- 3 JLab postdoctoral fellows (3 FTE)
- Deirdre Black (Ph.D. 01, Syracuse) – from Oct 01 to Sep 03
- George Fleming (Ph.D. 00, Columbia) – from Oct 02 to Sep 04
- Igor Musatov (Ph.D. 99, ODU) – from Oct 01 to Sep 03
- Mark Paris (Ph.D. 01, UIUC) – from Nov 03
- Renato Higa (Ph.D. 03, São Paulo, Brazil) - from Oct 03
- Isgur Distinguished Postdoctoral Fellow (funded by SURA and JLab)
- 	     Evgeny Epelbaum (Ph.D. 00, Bochum) – from Oct 03
- Physics Division Research Fellow
- 	    Wally Melnitchouk# (Ph.D. 93, Adelaide) – from Sep 02 to present
*#**supported 25% by Theory Group, 75 % by Halls A, B, and C*
*& **after Sep 02, supported 25% by Theory, 75% by Halls A, B, C in FY 03*

**JLab Theory Group: Junior Staff**

## JLab Theory Group: Associate Staff

- 4 active senior staff (100% university support)
- 	Carl Carlson (W&M)	Marc Sher (W&M)
- 	Chris Carone (W&M)	Peter Agbakpe (NSU)
- 4 sabbatical visitors (supported by JLab)
- 	P. Blunden (Manitoba) - from Sep 02 to May 03
- 	C. Carlson (W&M) - from Jul 02 (one year)
- 	J. Tjon (Utrecht) - from Aug 02 (six months) and from Aug 03 (six months)
-   B. Ananthanarayan (IIS, Bangalore) – from May 03 (six months)
- 1 postdoctoral fellow (supported by external funding)
- 	Vladimir Pascalutsa (W&M, Gross’ DOE grant) - from Oct 03
- 5 graduate students (3 supported by JLab) + 2 LSU graduate students (starting this fall, one supported by LSU and the other by a SURA Fellowship)

## The JLab Theory Group Growth at a Glance

- JLab continues to provide strong support for the Theory Group
- In FY 01-02, 4 new FTE:
- 1 Distinguished Visiting Fellow – to broaden the group’s research interests and to 				             	             collaborate with Theory Group members
- 2 senior staff scientists – to lead the Lattice Hadron Physics Collaboration (LHPC)
- 1 postdoctoral fellow – to support and encourage young theorists entering the field
- In FY 02-03, 2.5 new FTE:
- 1 joint position with W&M in hadronic theory: Marc Vanderhaeghen
- 1 permanent position in phenomenology – closely coupled to the present and future 				                          experimental programs, to be filled by end of 2003
- Isgur Distinguished Postdoctoral Fellow: Evgeny Epelbaum
- In FY 03-04 and beyond:
- 1 additional joint position with W&M in hadronic/nuclear theory
- support for Diakonov's nine-month sabbatical (Apr-Dec 04)
- Establishment of a partial-wave* *analysis center (see slide 22)

## JLab Theory Group Research Activity: A Synopsis - I

- How quarks and gluons bind together to form hadrons
- Solving QCD in the nonperturbative regime:
- Lattice gauge theory (Edwards, Fleming, Richards, Melnitchouk)
- Solving QCD at the boundary between the perturbative and nonperturbative regimes:
- Sum rule techniques (Balitsky, Radyushkin)
- Hadronic form factors, quark-gluon distribution functions, and duality (Brodsky, Radyushkin, Vanderhaeghen, Balitsky, Carlson, Melnitchouk, Musatov, Edwards, Richards)
- Understanding and modeling the mechanism of confinement and the structure and decay of hadrons:
- Heavy-quark effective theory (Roberts, Goity)
- Chiral dynamics and large Nc QCD (Goity, Black, Carone, Gross, Roberts)
- Relativistic and nonrelativistic quark models (Goity, Gross, Roberts, Van Orden)

## JLab Theory Group Research Activity: A Synopsis - II

- How nucleons bind together to form nuclei
-  Constructing nuclear interactions and currents
- One-boson-exchange phenomenology and similar (Gross, Schiavilla, Van Orden)
- Effective field theory approach (Epelbaum)
- Understanding quantitatively the structure and reactions of nuclei from the underlying NN (and NNN) interactions and currents
- Relativistic approaches to nuclear dynamics (Gross, Schiavilla, Van Orden)
- Form factors and weak transitions in few-nucleon systems (Gross, Schiavilla, Van Orden)
- EFT studies of the structure of few-nucleon systems (Epelbaum, Gross, Schiavilla)
- Nuclear reactions of astrophysical interest (Schiavilla)
- The standard model and beyond (Black, Carlson, Carone, Sher)
- Constraints on lepton-flavor mixing from experiments
- Effects of TeV-scale physics on low-energy parity violating observables

## JLab Theory Group Research Activity:A Synopsis - III

**JLab Theory Group Research Activity:****A Synopsis - III**

- How Theory Group research matches the JLab current program

## Review of Theory Group Recent Results

- Brief review:
- Lattice QCD initiative: goals and status
- Hardware and software developments: SciDAC
- Lattice calculation of moments of nucleon structure functions
- Baryon structure in the large Nc limit
- Relativistic dynamics of few-nucleon systems in the spectator (Gross) formalism

## 1. Theory Group Role in the Lattice QCD Initiative

- DOE’s SciDAC program has funded a three-year (FY 02-04) National Lattice QCD Initiative at the $6M level; JLab fund allocation is $1.9M
- Within this broader initiative, a Lattice Hadron Physics Collaboration (LHPC; 24 theorists from 15 institutions), led by JLab-MIT, has been formed
- Three components to the lattice effort, with crucial roles in each played by     Edwards and Richards:
- Science component - To understand quantitatively hadron structure and interactions 		                              		                 from the underlying quark-gluon dynamics (spectroscopy of glueballs,		               		hybrids and N* resonances, moments of structure functions and GPDs, ... ) 	                    	 	            - Relevant for experimental program and the planned Hall D for the 12 GeV		                           	Upgrade
- Software component – to create a unified programming environment for achieving high 			                 		   efficiency on diverse multi-teraflop hardware
- Hardware component – the lattice QCD strategic plan envisions JLab as one of three national			                     centers capable of sustaining in  excess of 7 Tflops/s by 2006

## 1. Lattice QCD Initiative – Software and Hardware

- Software developments:
- QCD-API: portable programming interface for diverse computational platforms.  Development of  QDP++, a C++ implementation, led by Edwards
- Implementation of LHPC suite of physics being performed by Edwards, Fleming and Richards
- Hardware developments:
- 128-node Pentium IV cluster connected by Myrinet commissioned in Sep 02; tackling key problems including moments of structure functions and GPDs
-  256-node Pentium IV grid-based machine connected by GigE under order; aggregate computational capability of around 400 Gflops
- Prototype machines for envisioned multi-Tflops facility

## 1. Lattice QCD Initiative – Science ComponentCalculation of moments of structure functions-I

- Structure functions measure parton distribution close to light cone, and
-   Euclidean space formulation of lattice QCD precludes direct measurement
- In the Operator Product Expansion, moments of un-polarized and polarized
-   distribution functions

- are related to matrix elements of local operators

- Moments can be computed on Euclidean lattices

## 1. Lattice QCD Initiative – Science ComponentCalculation of moments of structure functions-II

- Importance of correctly including effect of pion cloud at light pion masses shown by Melnitchouk et al.; simulations should be performed near physical u- and d-quark masses, where this effect can emerge
- Domain-wall formulation of lattice fermions preserves analogue of chiral symmetry, while maintaining flavor identification
- Flavor-non-singlet momentum fraction carried by quarks of mass around that of s-quark shown to be compatible with experiment, Edwards et al.
- Large computational resources demands of domain-wall fermions being satisfied by 128-node and upcoming 256-node clusters
- Physics benefits from collaboration within SciDAC: calculations of DFs and GPDs using configurations generated by the MILC collaboration

- Moments of flavor non-singlet nucleon structure functions.  Different symbols denote different lattice spacings, star denotes experimental value

## 2. Baryon Structure in the Large Nc Limit – I

- The large Nc limit attempts to create a framework for non-perturbative QCD in
-   which systematic expansions for observables can be performed
- The infinite number of Feynman diagrams for a given process are organized into
-   distinct classes based on the power of Nc arising in each, according to:

- is a color index

- Baryon masses are ~ (Nc)1, while their radii are ~ (Nc)0; for example:

- Baryons are made up of Nc quarks:

-  ii) S scales as 1/Nc
- iii) factors of Nc from color loops

- i)

## 2. Baryon Structure in the Large Nc Limit – II

- Masses of strangeness S=0 (upper panel) and S=-1 (lower panel) negative-
- parity excited baryons: green shaded areas correspond to experimental
- data, black solid lines are the Isgur-Karl QM predictions, and the
- hatched boxes are the 1/Nc results#

- Baryon observables are expressed as linear combinations of
-   operators Oi acting on the quark spin-flavor d.o.f., for example

- Each operator Oi has a well defined 1/Nc power behavior from
-  i) counting the minimum number of gluons necessary for
-     such an operator to appear in an interaction
- ii) combinatoric powers of Nc if the Nc quarks contribute
-      coherently to the operator's matrix element
- Some comments:
-   i) (1405) is the lightest N* despite containing a s-quark, since
-     the hyperfine operator does not contribute to flavor-singlet
-      states, but pushes all the others up by 200-300 MeV
-  ii) good fit to N(1535)-N(1650) and N(1520)-N(1700) splittings
-      follows from flavor-dependent operators
- iii) the spin-orbit coupling is not large, but nevertheless
-      explains the (1520)-splitting

- #Goity, Schat, and Scoccola, PRD 66, 114014 (2002)

## 3. Relativistic Dynamics of Few-Nucleon Systems

- Gross ladder approximation

**3.**** Relativistic Dynamics of Few-Nucleon Systems**
** ****in the Spectator (Gross) formalism – I**

- The spectator formalism# provides a consistent framework for including relativity
-   in the dynamics of few-nucleon systems:

- i)

- In intermediate states always 2 particles on mass shell

- ii)

- OBE model with pseudo-scalar ( scalar (and vector (mesons, including off-shell couplings,
- constrained to fit NN data (see next slide)

- Faddeev-type integral equation for
- three-body scattering amplitude

- #*F. Gross, PR 186, 1448 (1969); PRD 10, 223 (1974); PRC 26, 2203 (1982)*

## 3. Relativistic Dynamics of Few-Nucleon Systems in the Spectator (Gross) formalism – II

- best NN fit

- closest to experimental
- binding energy

- Bound state energy is a pole in the scattering amplitude below
-   threshold:

- 3

- 2

- 1

- Vertex function  satisfies a homogeneous
-   integral equation:

- OBE theory with off-shell couplings

- ~

- OBE theory without off-shell couplings
- + many-body interactions

- Triton Energy#

- #*Stadler and Gross, PRL ***78***, 26 (1997)*

- Within manifestly covariant spectator theory:
- 	  i) consistent treatment of 2N and 3N systems
- 	 ii) realistic NN potentials available
- 	iii) electromagnetic currents for three-nucleon systems derived&

*&**Gross, Van Orden and collaborators, to be published*

## Research Productivity (Senior and Junior Staff, and Postdoctoral Fellows Only)

- Publications and invited talks in 2002:
- 32 publications in refereed journals
- 33 publications in conference proceedings (most invited)
- 25 unpublished invited talks at major conferences/workshops
- 21 seminars/colloquia at universities and labs around the world
- Active program of seminars, workshops, short- and long-term visitors (listed in the 2002 Annual Report)

## Articulating the JLab Physics Program to the Community at Large: Role of Theory Group  

- Published and/or commissioned review articles in last few years:
- Structure and Dynamics of Few-Nucleon Systems, Rev. Mod. Phys. **70**, 743 (1998)
- Quark Models of Baryon Masses and Decays, Prog. Part. Nucl. **45**, 241 (2001)
- The Deuteron: Structure and Form Factors, Adv. Nucl. Phys. **26**, 293 (2001)
- Generalized Parton Distributions, Handbook of QCD (World Scientific, 2001), ch. 19
- High-Energy QCD and Wilson Lines , Handbook of QCD (World Scientific, 2001), ch. 22
- Electromagnetic Structure of the Deuteron, J. Phys. G **28**, R37 (2002)
- Quark-Hadron Duality in Electron Scattering, to appear in Phys. Rep. (2003)
- Nuclear Effects in Deep Inelastic Scattering at High *x*, to appear in J. Phys. G (2004)
- Elastic Electron Scattering from Few-Body Systems, to appear in Ann. Rev. Nucl. Part. Sc. (2004)
- Membership in IACs and LOCs of major international conferences and workshops (02-03 selection): Baryon 2002, DPF2002, Lattice 2002, Nstar 2002, Exclusive Processes at High Momentum Transfer, Elba-VII, Few-Body XVII, INT Program on GPDs
- (Co-)Editorships of proceedings, books, etc. (01-03 selection): Chiral Dynamics:Theory and Experiment (World Scientific, 2001), Lepton Scattering, Hadrons and QCD (World Scientific, 2001), Lattice Hadron Physics (Nucl. Phys. Proc. Suppl. 109A, 2002), Electron-Nucleus Scattering VII (EPJ A, 2003)
-  “Community” service: Roberts, NSAC member; Schiavilla, Chair Elect of APS Few-Body Topical Group

## JLab Theory Group: Support for the Experimental Program at JLab - I

- Strong theoretical support for the current experimental program(s) at JLab (see following slide) – from proposal to publication !
- Strong theoretical support for the 12 GeV upgrade proposal:
- generalized parton distributions, study of hybrid hadrons, few-body program, Primex, ...
- Excited-Hadron and Radiative-Corrections Discussion Groups# – joint theoretical/experimental seminars/informal meetings on hadron physics and on the treatment of radiative corrections in electron scattering
- 			#*W. Melnitchouk played pivotal role*
- Mini-lecture Series – 3 lectures for experimentalists and graduate students on a topic relevant to the experimental program:
- J. Tjon – Relativistic hadron dynamics (Nov 02)
- P. Blunden – Radiative corrections in electro-weak processes (Jan 03)
- S. Brodsky – QCD phenomenology and light-front wave functions (Feb 03)
- S. Reddy – Novel phases at high density and their role in the structure and evolution of 	          of neutron stars (Apr 03)
- Planned in Jul 03: C. Carlson on single-spin asymmetries
- Input to TAC and PAC on theory behind JLab experimental proposals

## JLab Theory Group: Support for the Experimental Program at JLab - II

- Out of over 90 publications in the last three years, about 2/3 are directly related to specific experiments and/or aspects of the experimental program
- Leading role in organization of workshops and study groups, recent examples:
- 	workshops on Electron-Nucleus Scattering VII (2002) and Gluonic Excitations at JLab (2003), and the INT program on GPDs and Hard Exclusive Processes (2003)
- 	study group on radiative corrections led to a very productive interaction between experimentalists and theorists (contribution of box and crossed-box diagrams on Rosenbluth separation ...)
- A significant portion of Theory Group resources are devoted to support long-term visiting theorists working in projects very closely coupled to experiments and/or experimental programs, a few recent examples:
- 	Laget [2 months, (e,e’p) on few-body nuclei], Aznauryan [2 months, N*], Bonnet [6 months, pion  form factor lattice calculation], Stadler and Pena [6 weeks, electro-disintegration of 3He in the spectator- equation formalism], Close [2 months, hybrid mesons], ...

## Expanding Theory Group Support of JLab Experimental Program: the N* Analysis Center - I

- A proposal for the establishment of an N* analysis center at JLab#
- Role:	to develop, maintain, and update the theoretical and computational tools necessary 	to carry-out analysis of the large body of data associated with the N* program
- Scientific relevance:	to identify N* resonances and map-out their electromagnetic 			couplings, thus providing:  i) comparison with results from LQCD                                             calculations, ii) constraints on and insights into the modeling of                                             baryons, in particular in connection with the “missing resonance’’                                             problem
- Critical theoretical issues:	  i) background-resonance separation
- 				 ii) incorporation of multi-particle final states
- 				iii) importance of analyticity
- 	#see pre-proposal in appendix

## Expanding Theory Group Support of JLab Experimental Program: the N* Analysis Center - II

- Proposed structure:
- senior theorist with a broad knowledge of hadronic and electromagnetic interactions, reaction theory, and the methods used in phenomenological analysis
- mid-level staff position and several term/visiting positions  for theorists and experimentalists to advance the program and to interface with outside groups
- Establishment of a Scientific Advisory Board, consisting of the new permanent senior theorist, two representatives of the in-house N* groups, and two representatives of the N* community
- Total budget ~ $ 460k per year (+overhead)

## JLab Theory Group Other Needs

- One-two additional postdoc position(s) (the current number is three):
- 		 i) junior/senior staff ratio will be 3/11 in FY04 (projected to be 3/12 in 	    FY05 or FY06, when the new JLab/W&M position is expected to be 	    filled)
- 		ii) the group, given its size and breadth of research interests, could (and 	    should) support more postdoctoral fellows
- Additional funds for supporting long-term visitors:
- 		i) the present operating budget of Theory Group is insufficient to maintain 	   the long-term visitor program at current levels#

- #case in point: Dmitri Diakonov, for whom Hall B and Physics Division will provide 75% of the required
- 	       nine-month support in FY04

## JLab Theory Group: Mentoring Postdocs and Graduate Students

- Good environment for postdocs and students, strengthened by the strong visitor and seminar programs, mini-lecture series, ...
- People who have completed their postdocs in the last four years:
- J. Forest		 “two-body problem”, stay at home mom at present
- S. Jeschonnek		 Asst. Prof. (tenure-track), Ohio State University at Lima
- R. Lebed 		 Asst. Prof. (tenure-track), Arizona State University
- W. Melnitchouk	 Physics Division Research Fellow at JLab
- Nine Ph.D.’s in the last five years (five of them in academic positions):
- D. Krioukov, ODU 98	 Software company
- M. Uzzo, W&M 98 	 Research Scientist-Harvard Smithsonian Center for 				   Astrophysics
- L. Zhang, Hampton 98 	 Oracle Corporation
- I. Grigentch, ODU 99	 Software company
- I. Musatov, ODU 99 	 Postdoctoral Fellow, JLab Theory Group
- P. Agbakpe, Hampton 00  Asst. Prof. (tenure-track), Norfolk State University
- L. Marcucci, ODU 00 	 Researcher (tenure-track), University of Pisa, Italy
- A. Rakotovao, ODU 00	 Back to Madagascar
- Z. Batiz, W&M 01 	 Postdoctoral Fellow, CFIF-Lisbon, Portugal
- Five (+two in fall) students currently working towards their Ph.D.’s

## JLab Theory Group: Summary

- Theory Group carries out a broad program of research in nuclear and hadronic physics with a number of different “tools”
- Three themes: structure and dynamics of hadrons (1) and nuclei (2), and physics of the Standard Model and beyond (3)
- Recent “tool” addition: lattice gauge theory
- Best gauge of scientific quality is the research carried out so far#
- Theory Group actively supports the present and planned experimental programs at JLab
- Excited-Hadron Initiative and Radiative Corrections Study Group, and 5 mini-lecture series
- Its broad research program beneficial to other labs as well
- Future opportunities: the N* Analysis Center
- Theory Group provides a mentoring environment for postdocs and graduate students in both experiment and theory
- Seminars, mini-lecture series, study groups
- Strong program of short- and long-term visitors
- JLab provides strong support for theory

- # *see Appendices with senior staff profiles and publication list in 02*

## Appendix: Profiles of Senior Staff-1

**Ian Balitsky**
- Ph.D., St. Petersburg, 1981
- Researcher, St. Petersburg Nuclear Physics Institute, 1980-1989
- 	Senior Researcher, St. Petersburg Nuclear Physics Instute, 1989-1992
- 	Postdoctoral Fellow, Penn State University, 1992-1995
- 	Research Scientist, MIT, 1995-1996
- 	Senior Staff/Assc. Prof., JLab/ODU, 1996-present
- Author of 60 publications
- Research Highlights:
- BFKL pomeron (B  Balitsky)
- Sum rules for static hadronic properties
- Nonlocal operator product expansion and light-cone sum rules
- Valley method for instanton interactions
- Spin structure of the proton
- Small-x evolution in high density QCD

## Appendix: Profiles of Senior Staff-2

**Robert Edwards**
- Ph.D., New York University, 1989
- Postdoctoral Research Scientist, SCRI-FSU, 1989-1992
-   Assistant Research Scientist, SCRI, 1992-1997
-   Associate Research Scientist, SCRI, 1997-1999
-   Senior Staff, JLab, 1999-present
- Honors: Gordon Bell Prize for Price Performance SC98 for the QCDSP Supercomputer, 1998
- Author of over 50 publications
- Research Highlights:
- Spectroscopy studies in lattice QCD
- Hadronic structure in lattice QCD
- Chiral fermion development and studies in chiral symmetry breaking in gauge theories
- Hardware and software development

## Appendix: Profiles of Senior Staff-3

**Jose’ Goity**
- Ph.D., University of Munich, 1985
- Postdoctoral Fellow at:
- 		Max Planck Institute, 1984-1985
- 		CNRS-Institute of Theoretical Physics, Marseilles, 1985-1986
- 		Bern University, 1986-1988
- 		Paul Scherrer Institute, 1988-1991
- 		CEBAF, 1991-1993
- 	Senior Staff/Asst. Prof., JLab/Hampton, 1993-1998
- 	Senior Staff/Assc. Prof., JLab/Hampton, 1998-2002
-    Senior Staff/ Prof., JLab/Hampton, 2002-present
- Author of 50 publications
- Research Highlights:
- Chiral perturbation theory with heavy quark symmetry
- Chiral perturbation theory for light baryons
- Strangeness in exchange currents using effective Lagrangians
- Large Nc limit

## Appendix: Profiles of Senior Staff-4

**Franz Gross**
- Ph.D., Princeton University, 1963
- Instructor-Research Associate, 1963-1966
-   Asst. Prof., Cornell University, 1966-1969
-   Assc. Prof., Cornell University, 1969-1970
- 	Assc. Prof., W&M, 1970-1976
- 	Prof., W&M, 1976-1986
- 	Senior Staff/Prof., JLab/W&M, 1985-2002
- 	Senior Staff/Emeritus Prof., JLab/W&M, 2002-present
- Honors: Sporn Award, Fullbright Fellow, Woodrow Wilson Fellow, Fellow of the American Physical Society
- Author of 122 publications and 1 book
- Research Highlights:
- Relativistic theory of few body systems
- Relativistic boson-exchange model of nuclear forces
- Elastic and inelastic e-d scattering
- Covariant calculations of three body bound states
- Quark models for mesons
- Exact solutions of field theories using the Feynman-Schwinger technique

## Appendix: Profiles of Senior Staff-5

**Anatoly Radyushkin**
- Ph.D., Moscow State University, 1978
- Junior Scientist, JINR-Dubna, 1978-1983
- 	Senior Scientist, JINR-Dubna, 1983-1988
- 	Leading Scientist, JINR-Dubna, 1988-1992
- 	Senior Staff/Prof., JLab/ODU, 1992-present
- Honors: Three Annual Awards at JINR-Dubna, Fellow of the American Physical Society, ODU Eminent Scholar, ODU Annual Faculty Research Award, Alexander von Humboldt Award
- Author of 132 publications
- Research Highlights:
- Factorization for hard inclusive processes and elastic form factors in QCD
- QCD sum rules for form factors
- Wilson loop/renormalization group approach to infrared behavior of QCD
- Nonlocal condensate formalism in QCD sum rules
- Deeply virtual exclusive processes in QCD and generalized parton distribution functions

## Appendix: Profiles of Senior Staff-6

**David Richards**
- Ph.D., University of Cambridge, 1984
- Postdoctoral Fellow:
- 		Southampton University, U.K., 1984-1986
- 		Argonne National Laboratory, 1986-1988
- 		University of Edinburgh, Scotland, 1988-1993
- 	PPARC Advanced Fellow, University of Edinburgh, Scotland, 1993-1999
- 	Senior Staff/Visiting Assc. Prof., JLab/ODU, 1999-2001
- 	Senior Staff, JLab, 2001-present
- Author of 59 publications
- Research Highlights:
- Energy-energy correlations in QCD
- Two-gluon exchange models of the pomeron and diffractive scattering
- Spectroscopy of excited baryons from lattice QCD
- Lattice QCD calculations of weak-interaction matrix elements and quark distribution amplitudes
- Nucleon-nucleon interaction in lattice QCD

## Appendix: Profiles of Senior Staff-7

**Winston Roberts**
- Ph.D., University of Guelph, 1988
- Visiting Researcher, Institut des Sciences Nucleaires, Grenoble, France, 1988-1989
- 	Postdoctoral Fellow, Harvard University, 1989-1991
- 	Senior Staff/Asst. Prof., JLab/ODU, 1991-1997
- 	Senior Staff/Assc. Prof., JLab/ODU, 1997-present
- 	NSF Program Manager for “Mathematical Physics” and “Nuclear Theory,” 1998-2000
- Honors: Canada NSERC Postdoctoral Fellowship, NSF National Young Investigator Award (1994-1999)
- Author of 44 publications
- Research Highlights:
- Expansion in 1/mQ in heavy quark effective theory
- Application of heavy quark symmetry to charm beta decay
- Baryon resonances in the 3P0 decay model and the search for missing resonances

## Appendix: Profiles of Senior Staff-8

**Rocco Schiavilla**
- Ph.D., University of Illinois at Urbana-Champaign, 1987
- Postdoctoral Fellow at:
- 		DPhN/HE Saclay, 1987-1988
- 		CEBAF, 1988-1990
- 		Argonne National Laboratory, 1990-1992
- 	Staff Scientist, INFN-Lecce, 1992-1993
- 	Senior Staff/Asst. Prof., JLab/ODU, 1993-1999
- 	Senior Staff/Assc. Prof., JLab/ODU, 1999-2002
- 	Senior Staff/Prof., JLab/ODU, 2002-present
- Honors: Enrico Fermi Scholar, Argonne Nat. Lab., 1990-1992, Fellow of the American Physical Society
- Author of 87 publications
- Research Highlights:
- Nuclear interactions and currents
- Electro-weak structure and response of light nuclei
- Weak and radiative capture reactions of astrophysical interest
- Hamiltonian approach to relativistic dynamics
- Exact quantum Monte Carlo methods for nuclei

## Appendix: Profiles of Senior Staff-9

**Wally Van Orden**
- Ph.D., Stanford University, 1978
- Postdoctoral Fellow, University of Maryland, 1978-1981
- 	Asst. Prof., University of Maryland, 1981-1987
- 	Staff Scientist, CEBAF, 1987-1990
- 	Senior Staff/Assc. Prof., JLab/ODU, 1990-1998
- 	Senior Staff/Prof., JLab/ODU, 1998-present
- Honors: ODU Eminent Scholar
- Author of 46 publications
- Research Highlights:
- Relativistic models for elastic and quasi-elastic scattering from light nuclei
- Covariant model for nucleon-nucleon scattering and application to elastic and quasi-elastic ed scattering
- Relativistic constituent quark model of heavy mesons
- Relativistic three-body systems