Publications (68)
Behavior of the Hadron Potential at Large Distances and Properties of the Hadron Spin-flip Amplitude
E. Predazzi, O. V. Selyugin
The impact of the form of the hadron potential at large distances on the behaviour of the hadron spin-flip amplitude at small angles is examined. The -dependence of the spin-fli…
Do we need two Pomerons?
M. Bertini, M. Giffon, E. Predazzi
We show that one single Pomeron compatible with the Froissart limit, can account for all the present HERA data.
New analytic unitarization schemes
J. -R. Cudell, E. Predazzi, O. V. Selyugin
We consider two well-known classes of unitarization of Born amplitudes of hadron elastic scattering. The standard class, which saturates at the black disk limit includes the standa…
Anomalies in Diffractive Electroproduction of 2S Radially Excited Light Vector Mesons at HERA
J. Nemchik, N. N. Nikolaev, E. Predazzi +1
We present the color dipole phenomenology of diffractive photo- and electroproduction $γ^{*} N\to V(V') N$ of vector mesons () and their radial…
The diffraction cone for exclusive vector meson production in deep inelastic scattering
J. Nemchik, N. N. Nikolaev, E. Predazzi +2
We develop the color dipole gBFKL phenomenology of a diffraction cone for photo- and electroproduction $γ^{*}N \to VN$ of heavy vector mesons (charmonium & bottonium) at HERA and…
Duality in strong interactions
L. Jenkovszky, V. K. Magas, E. Predazzi
By introducing Q^2-dependence in resonance-reggeon "soft" dual models with nonlinear trajectories, they are extended to "hard" processes, sharing the property of parton-hadron dual…
Conclusive tests of local realism and pseudoscalar mesons
M. Genovese, C. Novero, E. Predazzi
Many beautiful experiments have been addressed to test standard quantum mechanics against local realistic models. Even if a strong evidence favouring standard quantum mechanics is…
Analytical evolution of nucleon structure functions with power corrections at twist-4 and predictions for ultra-high energy neutrino-nucleon cross section
R. Fiore, L. L. Jenkovszky, A. V. Kotikov +3
In this paper we present an analytic result for the evolution in of the structure functions for the neutrino-nucleon interaction, valid at twist-2 in the region of small valu…
Of Dips, Structures and Eikonalization
P. Desgrolard, M. Giffon, E. Martynov +1
We have investigated several models of Pomeron and Odderon contributions to high energy elastic and scattering. The questions we address concern their role in this…
Coulomb Interference in High-Energy pp and pbar p Scattering
V. A. Petrov, E. Predazzi, A. Prokudin
An analysis of the Coulombic amplitude and its interference with the nuclear amplitude which is driven by the three-component Pomeron is presented. It is shown that different appro…
Non universality of structure functions and measurement of the strange sea density
V. Barone, M. Genovese, N. N. Nikolaev +2
We show that there is no real conflict between the two determinations of the strange sea density from the opposite--sign dimuon production and from the difference of the stru…
Higgs Pain? Take a Preon!
J. -J. Dugne, S. Fredriksson, J. Hansson +1
The Higgs mechanism is the favourite cure for the main problem with electroweak unification, namely how to reconcile a gauge theory with the need for massive gauge bosons. This pro…
Nuclear Hadronization: Within or Without?
B. Z. Kopeliovich, J. Nemchik, E. Predazzi +1
Nuclei are unique analyzers for the early stage of the space-time development of hadronization. DIS at medium energies is especially suitable for this task being sensitive to hadro…
Unitarization of Structure Functions at Large
V. Barone, M. Genovese, N. N. Nikolaev +2
We discuss the effects of the -channel unitarization on the and dependence of structure functions. The unitarization is implemented at the level of photoabsorption c…
A first test of Wigner function local realistic model
G. Brida, M. Genovese, M. Gramegna +2
We perform a first experimental test of a local realistic model, recently proposed, based on the Wigner function as probability distribution for the hidden variable. Our results di…
Unitarity effects in DIS
B. Z. Kopeliovich, B. Povh, E. Predazzi
We argue that diffractive DIS, dominated by soft interactions, is probably the unique process which allows us to observe unitarity effects in DIS. Guided by a close analogy between…
Diquark model of dibaryons
D. B. Lichtenberg, R. Roncaglia, E. Predazzi
A diquark model previously formulated to describe exotic mesons is extended to dibaryons. In the model, dibaryons containing only light quarks are unbound. The dibaryon, consis…
On the reconstruction of diagonal elements of density matrix of quantum optical states by on/off detectors
G. Brida, M. Genovese, M. Gramegna +3
We discuss a scheme for reconstructing experimentally the diagonal elements of the density matrix of quantum optical states. Applications to PDC heralded photons, multi-thermal and…
Mass sum rules for singly and doubly heavy-flavored hadrons
D. B. Lichtenberg, R. Roncaglia, E. Predazzi
Regularities in the hadron interaction energies are used to obtain formulas relating the masses of ground-state hadrons, most of which contain heavy quarks. Inputs are the constitu…
Preon Trinity
J. -J. Dugne, S. Fredriksson, J. Hansson +1
We present a new minimal model for the substructure of all known quarks, leptons and weak gauge bosons, based on only three fundamental and stable spin-1/2 preons. As a consequence…
Of dips and structures
P. Desgrolard, M. Giffon, E. Martynov +1
A detailed analysis of the existence of high energy secondary diffractive dips and structures in the extrapolations of the fits to the data is given. The existence of these dips an…
Hadronization in Nuclear Environment and Electroproduction of Leading Hadrons
B. Kopeliovich, J. Nemchik, E. Predazzi
Radiative energy loss of a highly virtual quark originating from a deep-inelastic electron scattering plays a crucial role in production of leading hadrons off nuclei. The density…
Color Dipole Systematics of Diffractive Photo- and Electroproduction of Vector Mesons
J. Nemchik, N. N. Nikolaev, E. Predazzi +1
We present the first evaluation of color dipole cross section from experimental data on diffractive photo- and electroproduction of vector mesons. The dipole-size and energy depend…
Soft QCD Dynamics of Elastic Scattering in Impact Parameter Representation
B. Z. Kopeliovich, I. K. Potashnikova, B. Povh +1
The elastic hadronic amplitude is calculated using the nonperturbative light-cone dipole representation for gluon bremsstrahlung. The data for large mass diffraction demand a two-s…
Diffraction : past, present and future
E. Predazzi
Hadronic diffraction has become a hot and fashionable subject in recent years due to the great interest triggered by the HERA and Tevatron data. These data have helped to put the f…
Tailoring PDC speckle structure
G. Brida, M. Genovese, A. Meda +2
Speckle structure of parametric down conversion light has recently received a large attention due to relevance in view of applications to quantum imaging The possibility of tailori…
Pomeron contribution to Spin-flip
A. F. Martini, E. Predazzi
The pp polarization data confirm the presence of a diffractive-like (Pomeron) contribution in the spin-flip amplitude. The extrapolation to RHIC energies does not appear very promi…
The additive quark model revisited: hadron and photon induced cross-sections
P. Desgrolard, M. Giffon, E. Martynov +1
The standard additive quark model and the ensuing counting rules are modified to take into account the quark-gluonic content of the Pomeron and of the secondary Reggeons. The resul…
The high-energy hadron spin-flip amplitude at small momentum transfer and new AN data from RHIC
J. R. Cudell, E. Predazzi, O. V. Selyugin
In the case of elastic high-energy hadron-hadron scattering, the impact of the large-distance contributions on the behaviour of the slopes of the spin-non-flip and of the spin-flip…
Leptoproduction of charm revisited
V. Barone, M. Genovese, N. N. Nikolaev +2
We calculate the energy--momentum distribution of the charmed quarks produced in neutrino reactions on protons, quantifying the importance of mass and current non--conservation eff…
Large-distance effects on spin observables at RHIC
O. V. Selyugin, J. R. Cudell, E. Predazzi
The impact of large-distance contributions on the behaviour of the slopes of the spin-non-flip and of the spin-flip amplitudes is analysed. It is shown that the long tail of the ha…
Forward Physics at the LHC; Elastic Scattering
R. Fiore, L. Jenkovszky, R. Orava +3
The following effects in the nearly forward ("soft") region of the LHC are proposed to be investigated: 1) At small |t| the fine structure of the cone (Pomeron) shouldbe scrutinize…
Non-factorizable Contributions to the Large Rapidity Gap at HERA
R. Fiore, L. L Jenkovszky, F. Paccanoni +1
The large rapidity gap events from HERA are analyzed within a model containing a pomeron and an -reggeon contribution. The choice for the pomeron contribution is based on the Do…
A simple recipe to detect possible C-Odd effects in high energy and
M. Giffon, E. Predazzi, A. Samokhin
We provide a theorem to suggest that data may already be sufficient to detect possible asymptotic C-odd (Odderon) contributions. This can be done by comparing and…
Review of recent experimental progresses in Foundations of Quantum Mechanics and Quantum Information obtained in Parametric Down Conversion Experiments at IENGF
M. Genovese, G. Brida, E. Cagliero +2
We review some recent experimental progresses concerning Foundations of Quantum Mechanics and Quantum Information obtained in Quantum Optics Laboratory "Carlo Novero" at IENGF. Mor…
Can experimental tests of Bell inequalities performed with pseudoscalar mesons be definitive?
M. Genovese, C. Novero, E. Predazzi
We discuss if experimental tests of Bell inequalities performed with pseudoscalar mesons (K or B) can be definitive. Our conclusion is that this is not the case, for the efficiency…
Quantum state reconstruction using binary data from on/off photodetection
G. Brida, M. Genovese, M. Gramegna +6
The knowledge of the density matrix of a quantum state plays a fundamental role in several fields ranging from quantum information processing to experiments on foundations of quant…
Photoproduction of vector mesons in the Soft Dipole Pomeron model
E. Martynov, E. Predazzi, A. Prokudin
Exclusive photoproduction of all vector mesons by real and virtual photons is considered in the Soft Dipole Pomeron model. It is emphasized that being the Pomeron in this model a d…
Predicting the Masses of Heavy Hadrons without an Explicit Hamiltonian
R. Roncaglia, A. Dzierba, D. B. Lichtenberg +1
There are striking regularities in the masses and mass differences of known hadrons. Some of these regularities can be understood from known general properties of the interactions…
Phenomenology of Spin Zero Mesons and Glueballs
M. Genovese, D. B. Lichtemberg, E. Predazzi
We discuss the phenomenology of scalar and pseudoscalar mesons, emphasizing those which do not carry manifest flavor quantum numbers. Many of the properties of these mesons are sti…
The Crucial Role of Production in the Decay
M. Anselmino, I. Bediaga, E. Predazzi
In this paper the relevance of non-spectator decays of charm particles is analysed and some crucial tests for it are suggested.
Diffractive effects in spin-flip pp amplitudes and predictions for relativistic energies
A. F. Martini, E. Predazzi
We analyze the diffractive (Pomeron) contribution to pp spin-flip amplitude and discuss the possible scenarios for energies available at the Relativistic Heavy-Ion Collider (RHIC).…
New experimental test of Bell inequalities by the use of a non-maximally entangled photon state
G. Brida, M. Genovese, C. Novero +1
We report on the first realisation of a test of Bell inequalities using non-maximally entangled states. It is based on the superposition of type I parametric down conversion produc…
Analytic properties of different unitarization schemes
O. V. Selyugin, J. -R. Cudell, E. Predazzi
The analytic properties of the eikonal and U-matrix unitarization schemes are examined. It is shown that the basic properties of these schemes are identical. Both can fill the full…
A new conception experimental test of Bell inequalities using non-maximally entangled states
G. Brida, M. Genovese, C. Novero +1
We report on a test of Bell inequalities using a non-maximally entangled state, which represents an important step in the direction of eliminating the detection loophole. The exper…
Ultra-high energy neutrino-nucleon interactions
R. Fiore, L. L. Jenkovszky, A. Kotikov +3
Ultra-high energy ( GeV) neutrino-nucleon total cross sections are estimated from a soft non-perturbative model complemented by an approximate QCD evolution,…
Resonance-reggeon and parton-hadron duality in strong interactions
L. Jenkovszky, V. K. Magas, E. Predazzi
By using the concept of duality between direct channel resonances and Regge exchanges we relate the small- and large- behavior of the structure functions. We show that even a si…
Systematic study of the PDC speckle structure for quantum imaging applications
G. Brida, M. Genovese, A. Meda +2
Sub shot noise imaging of weak object by exploiting Parametric Down Converted light represents a very interesting technological development. A precise characterization of PDC speck…
A conclusive experiment to throw more light on "light"
G. Brida, M. Genovese, M. Gramegna +1
We describe a new realization of Ghose, Home, Agarwal experiment on wave particle duality of light where some limitations of the former experiment, realized by Mizobuchi and Ohtake…
The slope of the hadron spin-flip amplitude and the determination of Ï(s,t)
O. V. Selyugin, J. -R. Cudell, E. Predazzi
We re-examine the extraction of Ï(s,t), the ratio of the real part to the imaginary part of the scattering amplitude, and of the spin-flip amplitude, from the existing experimenta…
Shadowing in deuterium and the small-- limit of and
V. Barone, M. Genovese, N. N. Nikolaev +2
We discuss the updated NMC determination of and . Shadowing effects in deuterium make the structure functions determined by the NMC sensibly different…
A universal Regge pole model for all vector meson exclusive photoproduction by real and virtual photons
E. Martynov, E. Predazzi, A. Prokudin
A model based on a dipole Pomeron framework for vector meson exclusive photoproduction by real and virtual photons shows very good agreement with the experimental data. The model d…
Vector Meson Photoproduction in the Soft Dipole Pomeron Model Framework
A. Prokudin, E. Martynov, E. Predazzi
Exclusive photoproduction of all vector mesons by real and virtual photons is considered in the Soft Dipole Pomeron model. It is emphasized that being the Pomeron in this model a d…
Hadronization in Nuclear Environment
B. Z. Kopeliovich, J. Nemchik, E. Predazzi
We present a space-time description of hadronization of highly virtual quarks originating from a deep-inelastic electron scattering (DIS). Important ingredients of our approach are…
Interactions at large distances and spin effects in nucleon-nucleon and nucleon-nuclei scattering
J. R. Cudell, E. Predazzi, O. V. Selyugin
The momentum-transfer dependence of the slopes of the spin-non-flip and spin-flip amplitudes is analysed. It is shown that the long tail of the hadronic potential in impact paramet…
RHIC and diffraction in pp Spin-flip
A. F. Martini, E. Predazzi
We argue that diffraction (Pomeron) contribution is present in the pp spin-flip amplitude. RHIC polarization will be able to prove (or disprove) this conjecture.
Experimental test of local realism using non-maximally entangled states
M. Genovese, G. Brida, C. Novero +1
In this paper we describe a test of Bell inequalities using a non- maximally entangled state, which represents an important step in the direction of eliminating the detection looph…
Go and return propagation of biphotons in fiber and polarization entanglement
G. Brida, M. V. Chekhova, M. Genovese +2
Propagation of entangled photons in optical fiber is one of the fundamental issues for realizing quantum communication protocols. When entanglement in polarization is considered, a…
The Strange Quark Distribution
V. Barone, M. Genovese, N. N. Nikolaev +2
We discuss the latest CCFR determination of the strange sea density of the proton. We comment on the differences with a previous, leading--order, result and point out the relevance…
A New Method to Predict Meson Masses
R. Roncaglia, A. R. Dzierba, D. B. Lichtenberg +1
The Feynman--Hellmann theorem is used to show that vector meson energy eigenvalues are monotonically decreasing functions of the reduced masses of their constituent quarks. The exp…
PREDICTING THE MASSES OF BARYONS CONTAINING ONE OR TWO HEAVY QUARKS
R. Roncaglia, D. B. Lichtenberg, E. Predazzi
The Feynman-Hellmann theorem and semiempirical mass formulas are used to predict the masses of baryons containing one or two heavy quarks. In particular, the mass of the is…
First experimental test of Bell inequalities performed using a non-maximally entangled state
M. Genovese, G. Brida, C. Novero +1
We report on the realisation of a new test of Bell inequalities using the superposition of type I parametric down conversion produced in two different non-linear crystals pumped by…
Color dipole phenomenology of diffractive electroproduction of light vector mesons at HERA
J. Nemchik, N. N. Nikolaev, E. Predazzi +1
We develop the color dipole phenomenology of diffractive photo- and electroproduction $γ^{*}\,N\rightarrow V(V')\,N$ of light vector mesons () and their…
The Pomeron in Elastic and Deep Inelastic Scattering
M. Bertini, M. Giffon, L. Jenkovszky +2
We discuss some properties of the Pomeron in high energy elastic hadron-hadron and deep inelastic lepton-hadron scattering. A number of issues concerning the nature and the origin…
Nonperturbative Gluon Radiation and Energy Dependence of Elastic Scattering
B. Z. Kopeliovich, I. K. Potashnikova, B. Povh +1
The energy dependence of the total hadronic cross sections is caused by gluon bremsstrahlung which we treat nonperturbatively. It is located at small transverse distances about 0.3…
Eikonalization and Unitarity Constraints
P. Desgrolard, M. Giffon, E. Martynov +1
An extensive generalization of the ordinary and quasi-eikonal methods is presented for the and elastic scattering amplitudes, which takes into account in a phenomeno…
Exchange-degenerate Regge trajectories: a fresh look from resonance and forward scattering regions
P. Desgrolard, M. Giffon, E. Martynov +1
The exchange-degeneracy of the mesonic , , and Regge trajectories, dominant at moderate and high energies in hadron elastic scattering, is analyzed from two vie…
Diquark model of exotic mesons
D. B. Lichtenberg, R. Roncaglia, E. Predazzi
This is a conference mostly devoted to diquarks. Although an exotic meson can in principle be composed of a diquark and an antidiquark, such an exotic is unlikely to be experimenta…