Vai al contenuto| Home page|

   Ti trovi in: HOME »Programmi, progetti e risultati »I progetti »PRIN - Programmi di ricerca di Rilevante Interesse Nazionale»Programma di ricerca
INIZIO_TESTO_DA_INDICIZZARE

PROGRAMMA DI RICERCA 2004

italiano - english
Unità di Ricerca
Programmi di ricerca simili:
Classificazione scientifico-disciplinare
Classificazione brevettuale
Classificazione geografica
Bibliografia
1) NP studies in LGT

K.G.Wilson, Confinement Of Quarks, Phys.Rev.D10(1974)2445

S.Mandelstam, Vortices and quark confinement in nonabelian gauge theories, Phys.Rept.23(1976)245

G.Parisi, Toward a field theory of confinement, Phys.Lett.B61(1976)368

Y.Nambu, QCD And The String Model, Phys.Lett.B80(1979)372

G.'t Hooft, On the phase transition towards permanent quark confinement, Nucl.Phys.B138(1978)1

A.M.Polyakov, String representations and hidden symmetries for gauge fields, Phys.Lett.B82(1979)247; Gauge fields as rings of glue, Nucl.Phys.B164(1980)171

P.Hasenfratz, F.Karsch, Chemical potential on the lattice, Phys.Lett.B125(1983)308

M.Luscher, S.Sint, R.Sommer, P.Weisz, Chiral symmetry and O(a) improvement in lattice QCD, Nucl.Phys.B478(1996)365

G.Curci, G.Veneziano, Supersymmetry and the lattice, Nucl.Phys.B292(1987)555

H.Neuberger, Exactly massless quarks on the lattice, Phys.Lett.B417(1998)141

a) large distances in gauge theories

M.Caselle, M.Panero, P.Provero, String effects in Polyakov loop correlators, JHEP 0206(2002)061

M.Caselle, M.Hasenbusch, M.Panero, String effects in the 3d gauge Ising model, JHEP 0301(2003)057

F.Gliozzi, M.Panero, P.Provero, Large center vortices and confinement in 3D Z(2) gauge theory, Phys.Rev.D66(2002)017501

F.Gliozzi, A.Rago, Monopole clusters, center vortices, and confinement in a Z(2) gauge-Higgs system, Phys.Rev.D66(2002)074511

F.Di Renzo, L.Scorzato, The residual mass in lattice heavy quark effective theory to alpha^3 order, JHEP 0102:020,2001

G.Burgio, F.Di Renzo, G.Marchesini, E.Onofri, Lambda**2 contribution to the condensate in lattice gauge theory, Phys.Lett.B422(1998)219

F.Di Renzo, G.Marchesini, E.Onofri, Renormalons from eight loop expansion of the gluon condensate in lattice gauge theory, Nucl.Phys.B457(1995)202

P.Cea, L.Cosmai, M.D'Elia, The deconfining phase transition in full QCD with two dynamical flavors, JHEP 0402(2004)018

M.D'Elia, M.Lombardo, Finite density QCD via imaginary chemical potential, Phys.Rev.D67(2003)014505

J.Carmona, M.D'Elia, L.Del Debbio, A.Di Giacomo, B.Lucini, G.Paffuti, Color confinement and dual superconductivity in full QCD, Phys.Rev.D66(2002)011503

M.Della Morte, R.Frezzotti, J.Heitger, F.Knechtli, J.Rolf, R.Sommer, U.Wolffet, Recent results on the running coupling in QCD with two massless flavors, Nucl.Phys.Proc.Suppl.119(2003)439

P.Butera, M.Comi, A.J.Guttmann, Critical parameters and universal amplitude ratios of two-dimensional spin s Ising models using high temperature and low temperature expansions, Phys.Rev.B67(2003)054402

P.Butera, M.Comi, Critical universality and hyperscaling revisited for Ising models of general spin using extended high-temperature series, Phys.Rev.B65(2002)144431

L.Shchur, P.Butera, B.Berche, Susceptibility amplitude ratio in the two-dimensional three-state Potts model, Nucl.Phys.B620(2002)579

D.Boyanovsky, C.Destri, H.J.de Vega, The approach to thermalization in the classical phi**4 theory in (1+1)- dimensions: energy cascades and universal scaling, Phys.Rev.D69(2004)045003

C.Destri, L.Donetti, The spectral dimension of random trees, J.Phys.A35(2002)9499; On the growth of bounded trees, J.Phys.A35(2002)5147

b) Fermionic sector in LGT

R.Frezzotti, G.C.Rossi, Chirally improving Wilson fermions. O(a) improvement, hep-lat/0306014

R.Frezzotti, Wilson fermions with chirally twisted mass, Nucl.Phys.Proc.Suppl.119(2003)140

R.Frezzotti, G.C.Rossi, Twisted mass lattice QCD with mass nondegenerate quarks, [hep-lat 0311008]

M.Bonini, A.Feo, Wess-Zumino model with exact supersymmetry on the lattice, [hep-lat/0402034]


2) From gauge to string

C.Becchi, A.Rouet, R.Stora, Renormalization of gauge theories, Ann.Phys.98(1976)287

V.N.Gribov, Quantization of nonabelian gauge theories, Nucl.Phys.B139(1978)1

K.G.Wilson, J.B.Kogut, The renormalization group and the epsilon expansion, Phys.Rept.12(1974)75

J.Polchinski, Renormalization and effective lagrangians, Nucl.Phys.B231(1984)269

G.'t Hooft, A planar diagram theory for strong interactions, Nucl.Phys.B72(1974)461

E.Witten, Noncommutative geometry and string field theory, Nucl.Phys.B268(1986)253

A.Sen, B.Zwiebach, Tachyon condensation in string field theory, JHEP 0003(2000)002

C.M.Becchi, S.Giusto, C.Imbimbo, The renormalization of noncommutative field theories in the limit of large noncommutativity, Nucl.Phys.B664(2003)371,

C.M.Becchi, S.Giusto, C.Imbimbo, The Wilson-Polchinski renormalization group equation in the planar limit, Nucl.Phys.B633(2002)250

S.Giusto, C.Imbimbo, Physical states at the tachyonic vacuum of open string field theory, Nucl.Phys.B677(2004)52

M.Bonini, F.Vian, Wilson renormalization group for supersymmetric gauge theories and gauge anomalies, Nucl.Phys.B532(1998)473

3) Perturbative QCD and phenomenological studies

Yu.Dokshitzer, D.Diakonov, S.Troyan, Phys.Rep.58(1980)270

A.Mueller, Perturbative QCD at high-energies, Phys.Rep.73(1981)237

G.Altarelli, Partons in QCD, Phys.Rep.81(1982)1

A.Bassetto, M.Ciafaloni, G.Marchesini, Jet structure and infrared sensitive quantities in QCD, Phys.Rep.100(1983)201

V.Zakharov, QCD Perturbative expansions in large orders, Nucl.Phys.B385(1992)452

J.Polchinski, M.J.Strassler, Deep inelastic scattering and gauge/string duality, JHEP 0305(2003)012

E.Witten, Perturbative gauge theory as a string theory in twistor space, [hep-th/0312171]

G.Marchesini, B.Webber et al., HERWIG: A Monte Carlo event generator for simulating hadron emission reactions with interfering gluons, Comput.Phys.Commun.67(1992)465

P.Nason, S.Dawson, K.Ellis, Heavy quark production in hadronic collisions, Nucl.Phys.B327(1989)49

a) PT resummation and probes of NP effects

G.Marchesini, A.H.Mueller, BFKL dynamics in jet evolution, Phys.Lett.B575(2003)37

Yu.L.Dokshitzer, G.Marchesini, On large angle multiple gluon radiation, JHEP 0303(2003)040

A.Banfi, G.Marchesini, G.Smye, Away from jet energy flow, JHEP0208(2002)006, Azimuthal correlation in DIS, JHEP 0204(2002)024

R.Bonciani, S.Catani, M.L.Mangano, P.Nason, Sudakov resummation of multiparton QCD cross-sections, Phys.Lett.B575(2003)268

M.Cacciari, P.Nason, Charm cross-sections for the tevatron run II, JHEP 0309(2003)006

S.Catani, D.de Florian, M.Grazzini, P.Nason, Soft gluon resummation for higgs boson production at hadron colliders JHEP0307(2003)028

A.Brandenburg, P.Nason, C.Oleari, On a possible measurement of alpha(s) from b anti-b correlations in Z0 decay, Nucl.Phys.B667(2003)394

S.Frixione, P.Nason, B.R.Webber, Matching nlo QCD and parton showers in heavy flavor production, JHEP 0308(2003)007

T.Figy, C.Oleari, D.Zeppenfeld, Next-to-leading order jet distributions for Higgs boson production via weak boson fusion, Phys.Rev.D68(2003)073005

V.Del Duca, W.Kilgore, C.Oleari, C.R.Schmidt, D.Zeppenfeld, Kinematical limits on Higgs boson production via gluon fusion in association with jets, Phys.Rev.D67(2003)073003

C.Anastasiou, E.Glover, C.Oleari, M.Tejeda-Yeomans, Two loop QCD corrections to massless quark gluon scattering, Nucl.Phys.B605(2001)486

F.Caravaglios, M.Moretti, An algorithm to compute born scattering amplitudes without Feynman graphs, Phys.Lett.B358(1995)332

M.L.Mangano, M.Moretti, F.Piccinini, R.Pittau, A.Polosa, ALPGEN, a generator for hard multiparton processes in hadronic collisions, JHEP 0307(2003)001

M.Moretti, Theoretical aspects of higgs physics at the LHC, Int.Europhys.Conf. on HEP 2003, Aachen, [hep-ph/0401112]

I.I.Bigi, N.Uraltsev, On extracting heavy quark parameters from moments with cuts, Phys.Lett.B579(2004)340

N.Uraltsev, QCD Corrections in gamma(sl)(b), Mod.Phys.Lett.A17(2002)2317

I.Bigi, N.Uraltsev, On the expected photon spectrum in b->X+gamma and its uses, Int.J.Mod.Phys.A17(2002)4709

4) Computational methods:

R.Frezzotti, M.Hasenbusch, U.Wolff, J.Heitger, K.Jansen, Comparative benchmarks of full qcd algorithms, Comput.Phys.Commun.136(2001)1

R.Ammendola et al., Status of the apeNEXT project, Nucl.Phys.Proc.Suppl.119(2003)1038
Parole Chiave
TEORIE QUANTISTICA DEI CAMPI; TEORIE DI GAUGE NON ABELIANE; TEORIE DI GAUGE SU RETICOLO; QUANTO CROMODINAMICA; CONFINAMENTO DEL COLORE; GRUPPO DI RINORMALIZZAZIONE; TEORIE PERTURBATIVE; EFFETTI NON PERTURBATIVI; TEORIE STATISTICHE DEI CAMPI

Studi perturbativi e non perturbativi in teorie quantistiche dei campi per le interazioni fondamentali

Università degli Studi di Milano-Bicocca
Abstract
Vedere il testo in inglese:

The general aim of the present project is the study and development of quantum field theory (QFT) with focus on its application to fundamental interactions and, in particular, to QCD. Quantization of field theories has many difficulties some of which are as yet unsolved. QCD is the challenging case not only because of its phenomenological interests but also because it involves the most interesting theoretical questions such as colour confinement together with asymptotic freedom which forces one to deal with many scales (the short and large distances ones).

Properties, features and developments of QFT will be studied both by perturbative (PT) and non-perturbative (NP) methods. We will place particular attention on the complementary aspects of the results obtained by these two studies.

In the NP study we will focus on questions (QCD vacuum, confinement, deconfinement, renormalization group, phase transitions, universality, fermions and chiral properties) which can be answered by the support of intense numerical computations. One of the key points of the present project is that members of our collaboration are simultaneously involved in the study of these physics questions and in improving computational tools, algorithms and cods. This provides a unique accessibility to the needed instruments.

We will perform various PT studies in QCD (factorization, general iterative properties, exact >>>

Coordinatore Scientifico del Programma di Ricerca
Giuseppe MARCHESINI Università degli Studi di MILANO-BICOCCA
Obiettivo del Programma di Ricerca
Vedere il testo in inglese:

We will study properties and developments of quantum field theory with focus on its application to fundamental interactions, in particular to QCD. Our project involves expertises in various areas. Indeed, we think that an efficient way to study QCD (and gauge theories in general) requires coordinated researches in various directions: from abstract and formal studies to numerical computations, from phenomenological studies to developments of computational tools.

In our project we will consider non-perturbative (NP) aspects, whose the most noticeable are: large and short distance behaviour in gauge theories, fermions with their chiral properties, symmetry and symmetry-breaking, renormalization group and construction of a quantized theory. We will also perform intensive perturbative (PT) studies in QCD and consider their phenomenological applications with aims not only to describe data but also to derive the dynamical structure of the QCD radiation and to constrain NP corrections to PT results. In our study we will place attention to the complementary aspects of PT and NP results.

Given the framework and points described above, in the following we list the items analysed by the groups of our collaboration.

1) NP studies in lattice gauge theories

a) large distance in gauge theories: confinement and deconfinement transition, properties of the vacuum, quark-gluon plasma, phase >>>

Risultati parziali attesi
Vedere versione inglese:

For a research of the kind described here, it is not important to distinguish various stages, except for the fact that some researches are in the final stage, others in the working stage and others only in the stage of a feasibility study. In each area these three stages are interrelated. We expect that most of the area described above will produce useful results. As stated above the aim is to reach, by detailed and specific analysis, a better physical understanding of quantum field theory of fundamental interactions by using PT and NP methods.

Durata
24 mesi
Base di partenza scientifica nazionale o internazionale
Vedere il testo in inglese:

Here we schematically summarize the bases and motivations for the researches in our project.
We follow the scheme reported in Section 2.1

1) NP studies in LFT

a) Large distance in gauge theories.

The most important question here is the characterization of the vacuum sector of the theory and its topological properties, aimed to the understanding of the confinement mechanisms in QCD. Lattice simulations are an essential instrument in this analysis. Since years our groups are involved in these studies and we obtained various results on the following points:

-interquark potential and its universality;
-(effective) gauge theory and 't Hooft confinement criterion;
-string breaking in gauge theories with matter;
-QCD running coupling at large distances;
-renormalization group properties of observables (continuum limit);
-finite size effects and physical scales;
-phase diagrams at finite density and temperature.

Although QCD is the theory under consideration, in the analysis of renormalization group we also consider simpler models which share (or should share) the same specific features.

b) Fermionic sector in LFT

Fermions in QCD are essential to understand the vacuum and confinement and for phenomenological applications. In introducing fermions on a lattice one faces very difficult >>>