A5006608436- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- International Science and Diplomacy
- Muon and positron interactions and applications
- Atomic and Molecular Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Advanced Data Storage Technologies
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Scientific Research and Discoveries
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear physics research studies
- Complex Systems and Time Series Analysis
- Pulsars and Gravitational Waves Research
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2015-2024
University of Pavia
2003-2024
Brescia University
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2007-2021
Sapienza University of Rome
2004-2021
Istituto Nazionale di Fisica Nucleare
1994-2021
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2020
University of Würzburg
2018-2019
Max Planck Society
2019
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2010-2018
We compare different procedures for combining fixed-order tree-level matrix-element generators with parton showers. use the case of W-production at Tevatron and LHC to implementations so-called CKKW MLM schemes using cascades. find that although similar results are obtained in all cases, there important differences.
Heavy-light diquarks can be the building blocks of a rich spectrum states which accommodate some newly observed charmoniumlike resonances not fitting pure $c\overline{c}$ assignment. We examine this possibility for hidden and open charm diquark-antidiquark deducing spectra from constituent quark masses spin-spin interactions. Taking $X(3872)$ as input we predict existence ${2}^{++}$ state that associated to $X(3940)$ by Belle reexamine claimed SELEX, $X(2632)$. The possible assignment...
The effects of angular momentum conservation in peripheral heavy ion collisions at very high energy are investigated. It is shown that the initial quark-gluon plasma should enhance azimuthal anisotropy particle spectra (elliptic flow) with respect to usual picture where only geometrical eccentricity nuclear overlap region responsible for anisotropy. In hydrodynamical terms, entails a nontrivial dependence longitudinal flow velocity on transverse coordinates. This gives rise nonvanishing...
The Circular Electron Positron Collider (CEPC) is a large international scientific facility proposed by the Chinese particle physics community to explore Higgs boson and provide critical tests of underlying fundamental principles Standard Model that might reveal new physics. CEPC, be hosted in China circular underground tunnel approximately 100 km circumference, designed operate as factory producing electron-positron collisions with center-of-mass energy 240 GeV. collider will also at around...
Following the recent confirmation of Z+(4430) resonance with J^{PG}=1^{++}, we have re-examined model S- and P-wave tetraquarks. We propose a `type-II' diquark-antidiquark which shows to be very effective at producing simple comprehensive picture J^{PG}=1^{++} 1^{--} sectors recently discovered charged tetraquarks observed Y resonances. The is still faced unresolved difficulty explaining why some states seem incomplete isospin multiplets.
This Report summarizes the proceedings of 2015 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt with (I) new developments relevant for high precision Standard Model calculations, (II) PDF4LHC parton distributions, (III) issues in theoretical description production Higgs bosons and how to relate experimental measurements, (IV) a host phenomenological studies essential comparing LHC data from Run I predictions projections future measurements II, (V) Monte Carlo event generators.
We propose a new experiment to measure the running of electromagnetic coupling constant in space-like region by scattering high-energy muons on atomic electrons low-Z target through elastic process $$\mu \, e \rightarrow \mu e$$ . The differential cross section this process, measured as function squared momentum transfer $$t=q^2<0$$ , provides direct sensitivity leading-order hadronic contribution muon anomaly $$a^\mathrm{{HLO}}_{\mu }$$ By using beam 150 GeV, with an average rate $$\sim $$...
This Report summarizes the proceedings of 2015 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt with (I) new developments relevant for high precision Standard Model calculations, (II) PDF4LHC parton distributions, (III) issues in theoretical description production Higgs bosons and how to relate experimental measurements, (IV) a host phenomenological studies essential comparing LHC data from Run I predictions projections future measurements II, (V) Monte Carlo event generators.
Light scalar mesons are found to fit rather well a diquark-antidiquark description. The resulting nonet obeys mass formulas which respect, good extent, the Okubo-Zweig-Iizuka (OZI) rule. OZI allowed strong decays reasonably reproduced by single amplitude describing switch of qq pair, transforms state into two colorless pseudoscalar mesons. Predicted heavy states with one or more quarks replaced charm beauty briefly described; they should give rise narrow exotic quantum numbers.
We propose that the $Y(4260)$ particle recently announced by BABAR is first orbital excitation of a diquark-antidiquark state $([cs][\overline{c}\overline{s}])$. Using parameters determined to describe $X(3872)$ and $X(3940)$ we show $Y$ mass compatible with picture. A crucial prediction should decay predominantly in ${D}_{s}{\overline{D}}_{s}$. The also be seen $B$ nonleptonic decays association one kaon. consider full nonet related four-quark states their predicted properties. Finally,...
The hierarchy problem and the electroweak data, together, provide a plausible motivation for considering light Higgs emerging as pseudo-Goldstone boson from strongly-coupled sector. In that scenario, rates production decay differ significantly those in Standard Model. However, one genuine strong coupling signature is growth with energy of scattering amplitudes among Goldstone bosons, longitudinally polarized vector bosons well itself. rate double fusion thus enhanced respect to its...
The X(3872) is universally accepted to be an exotic hadron. In this Letter, we assume that the a D(0)D(*0) molecule, as claimed by many authors, and attempt estimate of its prompt production cross section at Fermilab Tevatron. A comparison with Collider Detector data allows us draw rather compelling quantitative conclusions about statement.
The past decade witnessed a remarkable proliferation of exotic charmonium-like resonances discovered at accelerators. In particular, the recently observed charged states are clearly not interpretable as q-qbar mesons. Notwithstanding considerable advances on experimental side, conflicting theoretical descriptions do seem to provide definitive picture about nature so-called XYZ particles. We present here comprehensive review this intriguing topic, discussing both those and aspects which we...
New BES and Belle data show a peak in the $Y(4260)$ decay into $J/\ensuremath{\psi}$ plus one charged pion. We point out that might correspond to resonance at about 3880 MeV predicted some time ago within tetraquark model. The same model predicts another 100 below observed one. discuss possibility of having it present data. On other hand we expect if molecular picture were correct one, corresponding ${D}^{*}{\overline{D}}^{*}$ state should appear 4020 MeV.
Measuring the shape of Higgs boson potential is paramount importance and will be a challenging task at current as well future colliders. While expectations for measurement trilinear self-coupling are rather promising, an accurate quartic interaction presently considered extremely even 100 TeV proton-proton collider. In this work we explore sensitivity that muon collider with center mass energy in multi-TeV range, luminosities order 10^35cm^-2s^-1, under discussion, might provide thanks to...
A new method for the calculation of molecular magnetic susceptibility and nuclear shielding is presented. It based on continuous transformations origin current density which make transverse part paramagnetic vanish. For any molecule all components tensor provided by are independent gauge, whereas magnetizability translationally invariant only center-symmetric molecules (they, in general, show a linear dependence shift origin). This method, termed CTOCD-PZ, has been implemented theoretical...