14.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of Rome Tor VergataIT2.7k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT2.4k papers
- Centre National de la Recherche ScientifiqueFR2.4k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR2.2k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT2.2k papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT2k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di GenovaIT2k papers
- University of GlasgowGB2k papers
- National Institute for Subatomic PhysicsNL1.9k papers
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26 papers · 1 filter
Fermionic zero-modes around string solitons
Diego Bellisai
In presence of string solitons, index theorems for the generalised Dirac operators have to be revisited. We show that in supersymmetric configurations the fermionic operators decou…
Electromagnetic Structure of Mesons in a Light-Front Constituent Quark Model
F. Cardarelli, I. L. Grach, I. M. Narodetskii +2
The elastic and transition electromagnetic form factors of mesons are investigated within a light-front constituent quark model. The general formulae for the space-like matrix elem…
Testing the Quasi-temporal Gauge on the Lattice
Livio Conti, Claudio Parrinello, Silvano Petrarca +1
We investigate the viability of the quasi-temporal gauge on the lattice. This is a complete gauge fixing condition that can be implemented on the lattice at a very low computationa…
Nucleon and pion electromagnetic structure and constituent quark form factors
F. Cardarelli, E. Pace, G. Salmè +1
We have evaluated nucleon and pion electromagnetic form factors using for the first time eigenfunctions of a light-front mass operator, reproducing a large set of energy levels, an…
Light meson decay constants beyond the quenched approximation
G. M. de Divitiis, R. Frezzotti, M. Guagnelli +2
We calculate the effects of including dynamical fermion loops in the lattice QCD estimates of meson decay constants, by extrapolating the results from negative flavour numbers afte…
Non-perturbative Renormalization of Lattice Operators
A. Vladikas
We briefly review and compare three methods (one perturbative, one based on Ward Identities and one non-perturbative) for the calculation of the renormalization constants of lattic…
Extended Self Similarity in numerical simulations of 3D anisotropic turbulence
R. Benzi, M. V. Struglia, R. Tripiccione
Using a code based on the Lattice Boltzmann Equation, we have performed numerical simulations of a turbulent shear flow. We investigate the scaling behaviour of the structure funct…
Flavour changing neutral currents and CP violating processes in generalized supersymmetric theories
E. Gabrielli, A. Masiero, L. Silvestrini
We consider supersymmetric extensions of the standard model with general non-universal soft breaking terms. We analyse in a model-independent way the constraints on these terms at…
Non-perturbative renormalization of the operator and the heavy-light axial current
A. Donini, V. Gimenez, G. Martinelli +3
We apply a recently introduced non-perturbative renormalization method to two types of lattice operators: the four fermion operator and the heavy-light static axial current,…
Chiral behaviour of the lattice -parameter with the Wilson and Clover Actions at
M. Crisafulli, A. Donini, V. Lubicz +4
We present results for the kaon -parameter from a sample of configurations using the Wilson action and configurations using the SW-Clover action, on a $18^3 \t…
Radiative and transition form factors in a light-front constituent quark model
F. Cardarelli, I. Grach, I. Narodetskii +2
The form factors of the and radiative transitions are evaluated within a light-front constituent quark model, using for the first time the eigenfunctions of a light-front…
Electromagnetic transition form factors in a light-front constituent quark model
F. Cardarelli, E. Pace, G. Salme' +1
A parameter-free evaluation of the electromagnetic transition form factors is carried out in a light-front constituent quark model, based on and eigenstates of a ma…
Non-Perturbative Renormalisation of the Lattice Four-Fermion Operator
A. Donini, G. Martinelli, C. T. Sachrajda +2
We compute the renormalised four-fermion operator using a non-perturbative method recently introduced for determining the renormalisation constants of generic lattice co…
Charge form factor of and mesons
F. Cardarelli, I. Grach, I. Narodetskii +3
The charge form factor of and mesons is evaluated adopting a relativistic constituent quark model based on the light-front formalism. The relevance of the high-momentum com…
Nucleon and pion electromagnetic form factors in a light-front constituent quark model
F. Cardarelli, E. Pace, G. Salme' +1
Nucleon and pion electromagnetic form factors are evaluated in the spacelike region within a light-front constituent quark model, where eigenfunctions of a mass operator, reproduci…
The bermions: an approach to lattice QCD dynamical fermions from negative flavour numbers
G. M. de Divitiis, R. Frezzotti, M. Guagnelli +2
We estimate the effects of dynamical fermions by extrapolating to positive flavour numbers the results from negative values obtained by adding to the pure gauge sector a fermion ac…
Instanton Effects in Supersymmetric Yang-Mills Theories on ALE Gravitational Backgrounds
M. Bianchi, F. Fucito, G. C. Rossi +1
In this letter we report on the computation of instanton-dominated correlation functions in supersymmetric YM theories on ALE spaces. Following the approach of Kronheimer and Nakaj…
Deep Inelastic Scattering in Improved Lattice QCD. II. The second moment of structure functions
Giuseppe Beccarini, Massimo Bianchi, Stefano Capitani +1
In this paper we present the 1-loop perturbative computation of the renormalization constants and mixing coefficients of the lattice quark operators of rank three whose hadronic el…
The Open Descendants of Non-Diagonal SU(2) WZW Models
G. Pradisi, A. Sagnotti, Ya. S. Stanev
We extend the construction of open descendants to the WZW models with non-diagonal left-right pairing, namely and the series in the classification of…
Perturbative predictions for B_c meson production in hadronic collisions
Marco Masetti, Francesca Sartogo
Perturbative cross section for direct B_c meson production in gluon gluon scattering g g --> B_c^+ b \bar{c} is calculated and compared with other existing results. Predictions for…
Smeared propagators for lattice hadron spectroscopy
G. M. de Divitiis, R. Frezzotti, M. Guagnelli +2
We propose to replace ordinary propagators in lattice operator correlations entering the determination of hadron masses with space-time smeared propagators. These are defined as th…
Electromagnetic form factors of the meson in a light-front constituent quark model
F. Cardarelli, I. L. Grach, I. M. Narodetskii +2
The electromagnetic form factors of the meson are evaluated adopting a relativistic constituent quark model based on the light-front formalism, and using a meson wave function…
RESULTS FOR THE B-MESON DECAY CONSTANT FROM THE APE COLLABORATION
C. R. Allton, M. Crisafulli, V. Lubicz +4
The decay constant for the B-meson in the static limit is calculated using the Wilson and clover actions at various lattice spacings. We show that both the contamination of our res…
DEPENDENCE OF THE CURRENT RENORMALISATION CONSTANTS ON THE QUARK MASS
M. Crisafulli, V. Lubicz, G. Martinelli +1
We study the behaviour of the vector and axial current renormalisation constants and as a function of the quark mass, . We show that sizeable and $O(g_0^…