Name

Hadronic structure and QCD: theory and phenomenology

Research activity

Our goal is to explore and understand the internal structure of nucleons in terms of their elementary constituents, i.e., quarks and gluons. Our research activity aims at answering fundamental questions such as: Can we define a "shape" of the nucleon and how does it look like? What generates the spin of the nucleon?
In principle, the structure of the nucleon should be computed starting from the theory of Quantum Chromodynamics (QCD). In practice, the confinement of quarks and gluons within nucleons is a nonperturbative phenomenon, and QCD is extremely hard to solve in nonperturbative regimes. For this reason, despite the enormous progress of the last decades, we still have a limited knowledge of the internal structure of nucleons, which constitute more than 99% of ordinary matter.
We turn to experimental measurements to gather the largest amount of information concerning nucleon structure. We make use of the tools of perturbative QCD to study hard scattering processes such as Deep Inelastic Scattering. We try to interpret the experimental measurements in terms of quark and gluon distribution functions. We compute the relevant quantities using models that effectively replace nonperturbative QCD. We make predictions for unmeasured observables. We actively participate in suggesting and planning future experimental measurements.

Keywords

Predefined keywords
  • PE2_2 - Fundamental interactions and particles
  • PE2_3 - Particle physics
  • PE2_4 - Nuclear physics

 

Other keywords
  • Structure of protons and neutrons
  • Quark and gluon distribution functions
  • Nucleon spin
  • Quantum Chromodynamics (QCD)

 

Coordinators

1 Alessandro Bacchetta
Ricercatore
Dipartimento Di Fisica
Via Bassi 6
Pavia
Tel. +39 0382 987449 - Mob. +39 340 7769998
2 Sigfrido Boffi
Professore Ordinario
Dipartimento Di Fisica Nucleare E Teorica
Via Bassi 6
Pavia
Tel. +39 0382 987434 - Mob. +39 338 6525295
3 Barbara Pasquini

Ricercatore
Dipartimento Di Fisica
Via Bassi 6
Pavia
Tel. 0382 987450 - Mob.

Coordinator's profile Alessandro Bacchetta

Curriculum vitae

2009-now: Ricercatore Universitario (Faculty Researcher), Univ. of PAVIA (Italy)
2008-2009: Nathan Isgur Distinguished Fellow, JEFFERSON LAB, Newport News (VA, USA)
2005-2008: Post-doc Researcher, DESY, Hamburg (Germany)
2004-2005: Alexander von Humboldt Fellow, Univ. of REGENSBURG (Germany)
2002-2003: Post-doc Researcher, Univ. of REGENSBURG (Germany)
2002: PhD (Doctoraat), Vrije Univ. AMSTERDAM (Nederland)
1998: Laurea (Degree) in Physics, Univ. of PAVIA (Italy)
1993-1998: Student at Almo Collegio Borromeo, PAVIA (Italy)
1974: Born in Borgosesia (Italy)

TEACHING EXPERIENCE
2010: Graduate course: "Soft skills for graduate students," Univ. of PAVIA (Italy)
2006-2010: Graduate lectures at Univ. of FERRARA (Italy), Univ. of TRIESTE (Italy), ECT* TRENTO (Italy)
1999-2005: Teaching Assistant for Quantum Mechanics, Electrodynamics, Introduction to Elementary Particle Physics, Quantum Field Theory at Univ. of REGENSBURG (Germany) and Vrije Univ. AMSTERDAM (Nederland)

HONORS AND AWARDS
2008: Nathan Isgur Distinguished Fellowship, Jefferson Laboratory (VA, USA)
2004: Alexander von Humboldt Fellowship, Alexander von Humboldt Foundation (Germany)

PROFESSIONAL ACTIVITY
2010: Organizer of workshop on Transverse Momentum Distributions (TMD2010), ECT*, Trento (Italy)
2009: Convener of workshop on Partonic Transverse Momentum Distributions, Mylos (Greece)
2008: Member of Local Organizing Committee, SPIN 2008 Symposium, Charlottesville (VA, USA)
- Referee for: Physical Review Letters, Physical Review D, Physics Letters B, Progress in Particle and Nuclear Physics, European Physical Journal A
- More than 30 seminars at universities and research institutions worldwide

FURTHER EXPERIENCE
2003-2008: Coordinator of the ADI-postoc Working Group, Italian PhD Association
1995-1998: Boy-Scout Leader, Italian Scout Association
1992-1993: Head Student Representative, Liceo Scientifico "G. Ferrari," Borgosesia (Italy)
1991-1992: Exchange student at East High School, Denver (CO, USA)

 

Publications (max 5)
A. Airapetian; N. Akopov; Z. Akopov; E. C. Aschenauer; W. Augustyniak; A. Avetissian; E. Avetisyan; BACCHETTA, ALESSANDRO; B. Ball; N. Bianchi; H. P. Blok; H. Bottcher; C. Bonomo; A. Borissov; V. Bryzgalov; J. Burns; M. Capiluppi; G. P. Capitani; E. Cisbani; G. Ciullo; M. Contalbrigo; P. F. Dalpiaz; W. Deconinck; R. De Leo; L. De Nardo; E. De Sanctis; M. Diefenthaler; P. Di Nezza; J. Dreschler; M. Duren; M. Ehrenfried; G. Elbakian; F. Ellinghaus; U. Elschenbroich
Observation of the Naive-T-odd Sivers Effect in Deep-Inelastic Scattering
Rivista: PHYSICAL REVIEW LETTERS - Volume: 103 - Pagine: 152002-Anno: 2009
(1 Contributo su Rivista)
BACCHETTA, ALESSANDRO; CONTI, FRANCESCO; Marco Radici
Transverse-momentum distributions in a diquark spectator model
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 78 - Pagine: 074010-Anno: 2008
(1 Contributo su Rivista)
BACCHETTA, ALESSANDRO; Daniel Boer; Markus Diehl; Piet J. Mulders
Matches and mismatches in the descriptions of semi- inclusive processes at low and high transverse momentum
Rivista: JOURNAL OF HIGH ENERGY PHYSICS - Volume: 08 - Pagine: 023-Anno: 2008
(1 Contributo su Rivista)
BACCHETTA, ALESSANDRO; Cedran Bomhof; Umberto D'Alesio; P. J. Mulders; F. Murgia
Sivers single-spin asymmetry in photon - jet production
Rivista: PHYSICAL REVIEW LETTERS - Volume: 99 - Pagine: 212002-Anno: 2007
(1 Contributo su Rivista)
BACCHETTA, ALESSANDRO; Markus Diehl; Klaus Goeke; Andreas Metz; Piet J. Mulders; Marc Schlegel
Semi-inclusive deep inelastic scattering at small transverse momentum
Rivista: JOURNAL OF HIGH ENERGY PHYSICS - Volume: 02 - Pagine: 093-Anno: 2007
(1 Contributo su Rivista)

 

Indexes
  • ISI (since 1990):
    • Total number of citations: 1036
    • H index: 17
  • SCOPUS (since 1996):
    • Total number of citations: 750
    • H index: 16

     

Coordinator's profile Sigfrido Boffi

Curriculum vitae

1981-today: Full Professor of Theoretical Physics, Univ. of Pavia
1980-1981: Full Professor of Theoretical Physics, Univ. of Bologna
1965-1980: Professor of General Physics I at the Univ. of Pavia
1969: degree of the Scuola di Perfezionamento in Fisica, Univ. of Roma
1962: degree in Physics, Univ. of Pavia
1958-1962: fellow of Collegio Ghislieri, Pavia

Charges:
2004-2011: Scientific Coordinator of the Pavia team for the projects "Hadron Physics" (2004-2007) and "Hadron Physics 2" (2008-2010) of the 6th and 7th Framework Programme of the European Union
2006-2009: Board member of Istituto Universitario di Studi Superiori (IUSS) as President of the Fondazione Collegio Universitario S. Caterina da Siena
2001-2005: Scientific Coordinator of the research project "Fisica teorica del nucleo e dei sistemi a molti corpi", supported by the Minister of Education, University and Research (MIUR)
2002-2008: Member of Academic Senate, Univ. of Pavia
1996-2003: Coordinator of the Italian team of the projects "Hadronic Physics with High Energy Electromagnetic Probes" (HaPHEEP) and "Electron Scattering Off Confined Partons" (ESOP), supported by the European Commission (EU) within the program "Improving Human Research Potential" (1996-2000) and "Training and Mobility of Researchers" (2000-2003), respectively
1995-2001: Director of Dipartimento di Fisica Nucleare e Teorica, Univ. of Pavia
1992-2005: Member of Scientific Programme Committee of GRAAL at ESRF (European Synchrotron Radiation Facility) in Grenoble
1995-2002: Member of Programme Advisory Committee of MAMI in Mainz and ELSA in Bonn
1988-1993: Member of Physics Committee of Consiglio Nazionale delle Ricerche (CNR).
1980-1993: Member of Board of Directors of Istituto Nazionale di Fisica Nucleare (INFN)
1977-1978: President of Physics Council of the Faculty of Sciences, Univ. of Pavia.
1975-1977: Director of Scuola di Perfezionamento in Fisica, Univ. of Pavia
1973-1981: Board member of Laboratorio Energia Nucleare Applicata (LENA), Univ. of Pavia

 

Publications (max 5)
PASQUINI, BARBARA; CAZZANIGA S; BOFFI, SIGFRIDO
Transverse momentum dependent parton distributions in a light-cone quark model
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 78 - Pagine: 034025/1-034025/15 - Num. pagine: 15 - Anno: 2008
(1 Contributo su Rivista)
BOFFI, SIGFRIDO; PASQUINI, BARBARA
Generalized parton distributions and the structure of the nucleon
Rivista: LA RIVISTA DEL NUOVO CIMENTO DELLA SOCIETÀ ITALIANA DI FISICA - Volume: 30 - Pagine: 387-448 - Num. pagine: 62 - Anno: 2007
(1 Contributo su Rivista)
PASQUINI, BARBARA; BOFFI, SIGFRIDO
Electroweak structure of the nucleon, meson cloud and light-cone wavefunctions
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 76 - Pagine: 074011/1-074011/16 - Num. pagine: 16 - Anno: 2007
(1 Contributo su Rivista)
PASQUINI, BARBARA; BOFFI, SIGFRIDO
Nucleon spin densities in a light-front constituent quark model
Rivista: PHYSICS LETTERS. SECTION B - Volume: 653 - Pagine: 23-28 - Num. pagine: 6 - Anno: 2007
(1 Contributo su Rivista)
PASQUINI, BARBARA; PINCETTI, MANUEL; BOFFI, SIGFRIDO
Drell-Yan processes, transversity and light-cone wavefunctions
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 76 - Pagine: 034020/1-034020/8 - Num. pagine: 8 - Anno: 2007
(1 Contributo su Rivista)

 

Indexes
  • ISI (since 1990):
    • Total number of citations: 1522
    • H index: 22
  • SCOPUS (since 1996):
    • Total number of citations: 1065
    • H index: 16

     

Coordinator's profile Barbara Pasquini

Curriculum vitae

2007-now: Faculty Researcher, Univ. of Pavia (Italy)
2003-2007: Post-doc Researcher at Univ. of Pavia
2002-2003: Post-doc Researcher, joint position Univ. of Trento and ECT*, Trento (Italy)
2000-2002: Post-doc Researcher, ECT*, Trento
1999-2000: Post-doc Researcher, Univ. of Mainz (Germany)
1998-1999: Marie Curie Fellow, Univ. of Mainz
1997-1998: specialization course at Univ. of Mainz
1997: PhD Doctorate, Univ. of Pavia
1994: Degree in Physics, Univ. of Pavia
1989-1994: Student at Collegio S. Caterina da Siena, Pavia
1970: Born in Lovere (Italy)

TEACHING EXPERIENCE
2000-2010: Teaching Assistant for Quantum Mechanics at Univ. of Pavia; for Introduction to Nuclear and Subnuclear Physics at Catholic Univ. of Brescia; for General Physics at the Faculty of Engineering of Brescia;
2007-2010: Advisor of 1 PhD thesis; 3 thesis for Master Degree in Physics; 3 thesis for Bachelor in Physics at Univ. of Pavia
2008-2010: Coordinator of Graduate Course: Statistical Mechanics: Statistical Field Theory
2008-2010: Coorganizer of Colloquia di Dottorato, at Univ. of Pavia
2007-2008: Organizer of Course of Seminars in Theoretical Physics at Univ. of Pavia
2007: Post-graduate lectures at 24th Student's Workshop on Electromagnetic Interactions, Bosen (Germany)

PROFESSIONAL ACTIVITY
2010: Organizer of parallel session in Int. Conference of High Energy Physics (ICHEP2010), Paris
2006-2009: Member of int. committee for the title of Doctor Europeus; for PhD title in Clermont-Ferrand (France) and Gent (Belgium)
2001-2005: Organizer of 4 international workshops at ECT*
- Referee for: Phys. Rev. Lett., Phys. Rev. C and D, Phys. Lett. B, Nucl. Phys. A and B, Eur. Phys. J. A and C
- More than 50 seminars at universities and research institutions worldwide
- Coauthors of 59 papers and 28 proceedings

FURTHER EXPERIENCE
2010: Researcher Representative of INFN

 

Publications (max 5)
M. Gorchtein; C. Lorce; PASQUINI, BARBARA; M. Vanderhaeghen
Light-front interpretation of Proton Generalized Polarizabilities
Rivista: PHYSICAL REVIEW LETTERS - Volume: 104 - Pagine: 112001-1-112001-4 - Num. pagine: 4 - Anno: 2010
(1 Contributo su Rivista)
PASQUINI, BARBARA; F. Yuan
Sivers and Boer-Mulders functions in Light-Cone Quark Models
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 81 - Pagine: 114013-1-114013-16 - Num. pagine: 16 - Anno: 2010
(1 Contributo su Rivista)
S. J. Brodsky; PASQUINI, BARBARA; B. Xiao; F. Yuan
Phases of Augmented Hadronic Light-Front Wave Functions
Rivista: PHYSICS LETTERS. SECTION B - Volume: 687 - Pagine: 327-330 - Num. pagine: 4 - Anno: 2010
(1 Contributo su Rivista)
BOFFI, SIGFRIDO; A. V. Efremov; PASQUINI, BARBARA; P. Schweitzer
Azimuthal spin asymmetries in light-cone constituent quark models
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 79 - Pagine: 094012/1-094012/20 - Num. pagine: 20 - Anno: 2009
(1 Contributo su Rivista)
PASQUINI, BARBARA; PINCETTI, MANUEL; BOFFI, SIGFRIDO
Chiral-odd generalized parton distributions in constituent quark models
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 72 - Pagine: 094029/1-094029/11 - Num. pagine: 11 - Anno: 2005
(1 Contributo su Rivista)

 

Indexes
  • ISI (since 1990):
    • Total number of citations: 628
    • H index: 16
  • SCOPUS (since 1996):
    • Total number of citations: 493
    • H index: 13

     

Research unit members

Others
1 Conti Francesco Post-doc H Index ISI: 1
INFN Italy
2 Courtoy Aurore Post-doc H Index ISI: 4
INFN Italy
3 Guagnelli Marco Ricercatore H Index ISI: 16
INFN Italy
4 Radici Marco Primo Ricercatore H Index ISI: 18
INFN Italy

 

Strategic collaborations

1 Avakian Harut
Jefferson Lab United States
2 Mulders Piet J.
Vrije Universiteit Amsterdam Netherlands
3 Vanderhaeghen Marc
Univ. Mainz Germany
4 Vogelsang Werner
Univ. Tuebingen Germany
5 Yuan Feng
Lawrence Berkeley National Lab United States

 

Funding - Major projects funded in the last 5 years

Financial autority/
tipologia progetto
Project name Start period Period
(months)
MIUR/PRIN 2008 La struttura del nucleone: impulso trasverso, spin trasverso e momento angolare orbitale. 22/03/2010 24 M
European Union/FP7 Integrated Infrastructure Initiative Study of strongly interacting matter (HadronPhysics2) 01/01/2008 36 M
European Union/FP6 Integrated Infrastructure Initiative Study of strongly interacting matter (HadronPhysics) 01/01/2004 48 M

Research unit products

Other publications (max 30)
A. Airapetian; N. Akopov; Z. Akopov; E. C. Aschenauer; W. Augustyniak; R. Avakian; A. Avetissian; E. Avetisyan; BACCHETTA, ALESSANDRO; S. Belostotski; N. Bianchi; H. P. Blok; A. Borissov; J. Bowles; I. Brodski; V. Bryzgalov; J. Burns; M. Capiluppi; G. P. Capitani; E. Cisbani; G. Ciullo; M. Contalbrigo; P. F. Dalpiaz; W. Deconinck; R. De Leo; L. De Nardo; E. De Sanctis; M. Diefenthaler; P. Di Nezza; M. Dueren; M. Ehrenfried; G. Elbakian; F. Ellinghaus; U. Elschenbroich
Effects of transversity in deep-inelastic scattering by polarized protons
Rivista: PHYSICS LETTERS. SECTION B - Volume: 693 - Pagine: 11-16 - Anno: 2010
(1 Contributo su Rivista)
BACCHETTA, ALESSANDRO; Marco Radici; CONTI, FRANCESCO; Marco Guagnelli
Weighted azimuthal asymmetries in a diquark spectator model
Rivista: THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI - Volume: 45 - Pagine: 373-388 - Anno: 2010
(1 Contributo su Rivista)
Alberto Accardi; BACCHETTA, ALESSANDRO; W. Melnitchouck; Marc Schlegel
What can break the Wandzura-Wilczek relation?
Rivista: JOURNAL OF HIGH ENERGY PHYSICS - Volume: 2009 - Pagine: 093-Anno: 2009
(1 Contributo su Rivista)
BACCHETTA, ALESSANDRO; Federico Alberto Ceccopieri; Asmita Mukherjee; Marco Radici
Asymmetries involving dihadron fragmentation functions: from DIS to e+e- annihilation
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 79 - Pagine: 034029-Anno: 2009
(1 Contributo su Rivista)
A. Airapetian; N. Akopov; Z. Akopov; A. Andrus; E. C. Aschenauer; W. Augustyniak; R. Avakian; A. Avetissian; E. Avetissian; BACCHETTA, ALESSANDRO; L. Barion; S. Belostotski; N. Bianchi; H. P. Blok; H. Bottcher; C. Bonomo; A. Borissov; A. Borysenko; A. Brull; V. Bryzgalov; G. P. Capitani; M. Capiluppi; E. Cisbani; G. Ciullo; M. Contalbrigo; P. F. Dalpiaz; W. Deconinck; R. De Leo; M. Demey; L. De Nardo; E. De Sanctis; E. Devitsin; M. Diefenthaler; P. Di Nezza
Evidence for a Transverse Single-Spin Asymmetry in Leptoproduction of pi+pi- Pairs
Rivista: JOURNAL OF HIGH ENERGY PHYSICS - Volume: 06 - Pagine: 017-Anno: 2008
(1 Contributo su Rivista)
BACCHETTA, ALESSANDRO; Leonard P. Gamberg; Gary R. Goldstein; Asmita Mukherjee
Collins fragmentation function for pions and kaons in a spectator model
Rivista: PHYSICS LETTERS. SECTION B - Volume: 659 - Pagine: 234-243 - Num. pagine: 9 - Anno: 2008
(1 Contributo su Rivista)
BACCHETTA, ALESSANDRO; Marco Radici
Modeling dihadron fragmentation functions
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 74 - Pagine: 114007-Anno: 2006
(1 Contributo su Rivista)
A. Airapetian; N. Akopov; Z. Akopov; M. Amarian; A. Andrus; E. C. Aschenauer; W. Augustyniak; R. Avakian; A. Avetissian; E. Avetissian; BACCHETTA, ALESSANDRO; P. Bailey; D. Balin; M. Beckmann; S. Belostotski; N. Bianchi; H. P. Blok; H. Bottcher; A. Borissov; A. Borysenko; M. Bouwhuis; A. Brull; V. Bryzgalov; G. P. Capitani; M. Cappiluppi; T. Chen; G. Ciullo; M. Contalbrigo; P. F. Dalpiaz; R. De Leo; M. Demey; L. De Nardo; E. De Sanctis; E. Devitsin
Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target
Rivista: PHYSICAL REVIEW LETTERS - Volume: 94 - Pagine: 012002-Anno: 2005
(1 Contributo su Rivista)
BACCHETTA, ALESSANDRO; C. J. Bomhof; P. J. Mulders; F. Pijlman
Single spin asymmetries in hadron hadron collisions
Rivista: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY - Volume: 72 - Pagine: 034030-Anno: 2005
(1 Contributo su Rivista)

 

Events (max 10)
2010 Organization of parallel session in International Conference of High Energy Physics (ICHEP 2010), Paris (France)
2010 Organization of Workshop on Transverse Momentum Distributions (TMD2010), ECT*, Trento (Italy)
2009 Organization of Workshop on Partonic Transverse Momentum Distibutions, Mylos (Greece)
2008 Organization of Parallel Session in International Symposium on Spin Physics (SPIN 2008), University of Virginia, Charlottesville (VA, USA)
2008 S. Boffi, C. Ciofi degli Atti, M.M. Giannini, D. Treleani (a cura di): Sixth International Conference on Perspectives in Hadronic Physics, Proceedings of the Conference held at ICTP, Trieste, 12-16 May 2008, AIP Conference Proceedings, Volume 1056, pp. 463.
2005 Organization of Workshop on Two-Photon Physics, ECT*, TRENTO (Italy)

 

Others

EXPERIMENTAL PROPOSALS al JEFFERSON LAB (Newport News, VA, USA):

1) E12-10-06, "Target Single Spin Asymmetry in Semi-Inclusive Deep-Inelastic Electro Pion Production on a Trasversely Polarized 3He Target at 8.8 and 11 GeV"

2) E12-09-007, "Studies of the Boer-Mulders Asymmetry in Kaon Electroproduction with Hydrogen and Deuterium Targets"

3) E12-09-009, "Studies of Spin-Orbit Correlations in Kaon Electroproduction in DIS with polarized hydrogen and deuterium targets"

EXPERIMENTA PROPOSALS at MAMI (Mainz, Germany):

1) A1-1/09, "A study of the Q^2 dependence of the structure functions P_LL-P_TT/epsilon and P_LT and the generalized polarizabilities alpha_E and beta_M in Virtual Compton Scattering at MAMI"

2) A1/01-00, "Double polarization Virtual Compton Scattering in the threshold regime"

Comparative strenghts of the research unit in a 3-5 year time frame


Our research takes place on a rapidly evolving frontier. In the last years our work has often turned into unexpected directions.

Our interests are at the intersection between particle and nuclear physics.

Even if our research is of theoretical nature, we work in close contact with experimental physicists.

We are part of a highly international, dynamic and friendly community of researchers worldwide.

Our activity is carried out in close collaboration with INFN Pavia.