3.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of PaviaIT2.8k papers
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- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT2.4k papers
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29 papers · 1 filter
A Study of the Decay D0->K+pi-
FOCUS Collaboration, Jonathan M. Link
Using a large sample of photoproduced charm mesons from the FOCUS experiment at Fermilab (FNAL-E831), we observe the decay with a signal yield of events…
Avoiding Quantum Chaos in Quantum Computation
G. P. Berman, F. Borgonovi, F. M. Izrailev +1
We study a one-dimensional chain of nuclear spins in an external time-dependent magnetic field. This model is considered as a possible candidate for experimental realization…
SUSY Long-Lived Massive Particles: Detection and Physics at the LHC
S. Ambrosanio, B. Mele, A. Nisati +4
We draw a possible scenario for the observation of massive long-lived charged particles at the LHC detector ATLAS. The required flexibility of the detector triggers and of the iden…
Continuous variable cloning via network of parametric gates
G. M. D'Ariano, F. De Martini, M. F. Sacchi
We propose an experimental scheme for the cloning machine of continuous quantum variables through a network of parametric amplifiers working as input-output four-port gates.
Elastic Form Factors in Point-form Approach
M. Radici
Using the point-form approach to relativistic quantum mechanics, a covariant framework is presented for the calculation of proton and neutron electromagnetic form factors. Results…
Near-to-planar 3-jet events in and beyond QCD perturbation theory
A. Banfi, Yu. L. Dokshitzer, G. Marchesini +1
We present the results of QCD analysis of out-of-event-plane momentum distribution in 3-jet e+e- annihilation events. We consider the all-order resummed perturbative prediction and…
Hadronic Decays of N and ΔResonances in a Chiral Quark Model
L. Theussl, R. F. Wagenbrunn, B. Desplanques +1
πand ηdecay modes of light baryon resonances are investigated within a chiral quark model whose hyperfine interaction is based on Goldstone-boson exchange. For the decay mechanism…
Glassy Spin Freezing and NMR Wipeout Effect in the High-T_c Superconductor La1.90Sr0.10CuO4: What is the Relationship With Stripes ?
M. -H. Julien, A. Campana, A. Rigamonti +9
We report on 139La and 63Ccu NMR/NQR measurements in the high-Tc superconductor La1.90Sr0.10CuO4 with Tc=26.5 K. Spin fluctuations probed by 139La spin-lattice relaxation (T1), con…
Approximate quantum cloning and the impossibility of superluminal information transfer
D. Bruss, G. M. D'Ariano, C. Macchiavello +1
We show that nonlocality of quantum mechanics cannot lead to superluminal transmission of information, even if most general local operations are allowed, as long as they are linear…
Covariant nucleon electromagnetic form factors from the Goldstone-boson-exchange quark model
R. F. Wagenbrunn, S. Boffi, W. Klink +2
We present a study of proton and neutron electromagnetic form factors for the recently proposed Goldstone-boson-exchange constituent quark model. Results for charge radii, magnetic…
Perturbative QCD analysis of near-to-planar three jet events
Andrea Banfi, Giulia Zanderighi
We present the all-order resummed thrust minor distribution as a measure of aplanarity in three-jet events.
Measuring the SUSY Breaking Scale at the LHC in the Slepton NLSP Scenario of GMSB Models
S. Ambrosanio, B. Mele, S. Petrarca +2
We report a study on the measurement of the SUSY breaking scale sqrt(F) in the framework of gauge-mediated supersymmetry breaking (GMSB) models at the LHC. The work is focused on t…
Hierarchies of invariant spin models
Gaspare Carbone, Mauro Carfora, Annalisa Marzuoli
In this paper we present classes of state sum models based on the recoupling theory of angular momenta of SU(2) (and of its q-counterpart , q a root of unity). Such cla…
On electromagnetic induction
Giuseppe Giuliani
A general law for electromagnetic induction phenomena is derived from Lorentz force and Maxwell equation connecting electric field and time variation of magnetic field. The derivat…
Joint measurements via quantum cloning
G. M. D'Ariano, C. Macchiavello, M. F. Sacchi
We explore the possibility of achieving optimal joint measurements of noncommuting observables on a single quantum system by performing conventional measurements of commuting self…
X-ray magnetic circular dichroism spectra on the superparamagnetic transition metal-ion clusters [Mn12O12(CH3COO)16(H2O)24].2CH3COOH.4H2O (Mn12) and [Fe8O2(OH)12(tacn)6]Br8 9H2O (Fe8)
Paolo Ghigna, Andrea Campana, Alessandro Lascialfari +4
The first X-ray magnetic circular dichroism (XMCD) spectra on the title compounds are presented. In Mn12 the Mn(III) and Mn(IV) contributions are clearly apparent and evidence the…
Electroweak Physics in Six-Fermion Processes at Future Colliders
F. Piccinini
Recent developments in the field of complete electroweak tree-level calculations for six-fermion final states in e+ e- collisions are briefly reviewed. Particular attention is give…
Search for CP violation in D0 and D+ decays
The FOCUS collaboration
A high statistics sample of photoproduced charm particles from the FOCUS (E831) experiment at Fermilab has been used to search for CP violation in the Cabibbo suppressed decay mode…
Anelastic relaxation and La NQR in LaSrCuO around the critical Sr content x=0.02
A. Campana, M. Corti, A. Rigamonti +2
Anelastic relaxation and La NQR relaxation measurements in LaSrCuO for Sr content x around 2 and 3 percent, are presented and discussed in terms of spin and…
Higher-order QED corrections to single-W production in electron-positron collisions
G. Montagna, M. Moretti, O. Nicrosini +2
Four-fermion processes with a particle lost in the beam pipe are studied at LEP to perform precision tests of the electroweak theory. Leading higher-order QED corrections to such p…
QCD analysis of near-to-planar 3-jet events
A. Banfi, G. Marchesini, Yu. L. Dokshitzer +1
Perturbative QCD analysis is presented of the cumulative out-of-plane momentum distribution in the near-to-planar e+e- annihilation events, K_out << Q. In this kinematical region m…
Large-angle Bhabha scattering and luminosity at flavour factories
C. M. Carloni Calame, C. Lunardini, G. Montagna +2
The luminosity determination of electron-positron colliders operating in the region of low-lying hadronic resonances (E_cm ~ 1-10 GeV), such as BEPC/BES, DAPHNE, KEKB, PEP-II and V…
Semi-inclusive structure functions in the spectator model
A. Bacchetta, S. Boffi, R. Jakob
We establish the relationship between distribution and fragmentation functions and the structure functions appearing in the cross section of polarized 1-particle inclusive deep-ine…
Magnetic field dependence of the superconducting fluctuation contribution to NMR-NQR relaxation
P. Mosconi, A. Rigamonti, A. A. Varlamov
The dependence of the Maki-Thompson (MT) and of the density of states depletion (DOS) contributions from superconducting fluctuations (SF) to NMR-NQR relaxation is derived in the f…