796 citations · 2.7k across the 32 of their papers we have counts for
31 papers · 1 filter
About All-Charm Tetraquarks in S and P Waves
Hugo Garcia Tecocoatzi, Luciano Maiani, Elena Santopinto +2
We present a quantitative analysis of masses and decays of tetraquarks, with diquarks and antidiquarks in S and P wave. We study explicitely the decays of the $4…
The Pentaquark Spectrum from Fermi Statistics
Luciano Maiani, Antonio D. Polosa, Veronica Riquer
We study compact hidden charm pentaquarks in the Born-Oppenheimer approximation, previously introduced for tetraquarks, assuming the heavy pair to be in a color octet. We show that…
Doubly Heavy Tetraquarks in the Born-Oppenheimer approximation
Luciano Maiani, Alessandro Pilloni, Antonio D. Polosa +1
Tetraquarks QQq*q* are found to be described remarkably well with the Quantum Chromodynamics version of the Hydrogen bond, as treated with the Born-Oppenheimer approximation. We sh…
GGI Lectures on Exotic Hadrons
Luciano Maiani, Alessandro Pilloni
It is well known that M. Gell-Mann, introducing quarks in 1964 to describe the known mesons and baryons, hinted at the existence of further mesons (tetraquarks) an…
Substructure of Multiquark Hadrons (Snowmass 2021 White Paper)
Nora Brambilla, Hua-Xing Chen, Angelo Esposito +27
In recent years there has been a rapidly growing body of experimental evidence for existence of exotic, multiquark hadrons, i.e. mesons which contain additional quarks, beyond the…
J/ψ-pair resonances by LHCb: a new revolution?
Luciano Maiani
A comment on the LHCb discovery of J/psi-pair resonances. To appear in Science Bulletin as a NEWS and VIEWS Paper.
The Hydrogen Bond of QCD
L. Maiani, A. D. Polosa, V. Riquer
Using the Born-Oppenheimer approximation, we show that exotic resonances, X and Z, may emerge as QCD molecular objects made of colored two-quark lumps, states with heavy-light diqu…
A Theory of X and Z Multiquark Resonances
L. Maiani, A. D. Polosa, V. Riquer
We introduce the hypothesis that diquarks and antidiquarks in tetraquarks are separated by a potential barrier. We show that this notion can answer satisfactorily long standing que…
Interpretation of Axial Resonances in J/psi-phi at LHCb
L. Maiani, A. D. Polosa, V. Riquer
We suggest that the J/psi phi structures observed by LHCb can be fitted in two tetraquak multiplets, the S-wave ground state and the first radial excitation, with composition [cs][…
Tetraquarks in the 1/N expansion and meson-meson resonances
L. Maiani, A. D. Polosa, V. Riquer
Diquarks are found to have the right degrees of freedom to describe the tetraquark poles in hidden-charm to open-charm meson-meson amplitudes. Compact tetraquarks result as interme…
B_c^+- decays into tetraquarks
A. Ali, L. Maiani, A. D. Polosa +1
The recent observation by the D0 collaboration of a narrow structure X(5568) consisting of four different quark flavors bdus, has not been confirmed by LHCb. More data and dedicate…
From Pentaquarks to Dibaryons in Lambda_b(5620) decays
L. Maiani, A. D. Polosa, V. Riquer
Pentaquarks and dibaryons are natural possibilities if diquarks are used as the building blocks to assemble hadrons. In this short note, motivated by the very recent discovery of t…
The observation of light nuclei at ALICE and the X(3872) conundrum
A. Esposito, A. L. Guerrieri, L. Maiani +4
The new data reported by ALICE on the production of light nuclei with pT < 10 GeV in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV are used to compute an order-of-magnitude estimate of…
Fully covering the MSSM Higgs sector at the LHC
A. Djouadi, L. Maiani, A. Polosa +2
In the context of the Minimal Supersymmetric extension of the Standard Model (MSSM), we reanalyze the search for the heavier CP-even and CP-odd neutral Higgs bosons at the…
The post-Higgs MSSM scenario: Habemus MSSM?
A. Djouadi, L. Maiani, G. Moreau +3
We analyze the Minimal Supersymmetric extension of the Standard Model that we have after the discovery of the Higgs boson at the LHC, the hMSSM (habemus MSSM?), i.e. a model in whi…
Bounds to the Higgs Sector Masses in Minimal Supersymmetry from LHC Data
L Maiani, AD Polosa, V Riquer
We update our analysis of the Higgs sector masses in Minimal Supersymmetry and in the Two-Higgs Doublet Model to the final ATLAS and CMS data from the 2011-2012 LHC run.
Neutrino Mixing and Masses from a Minimum Principle
R. Alonso, M. B. Gavela, G. Isidori +1
We analyze the structure of quark and lepton mass matrices under the hypothesis that they are determined from a minimum principle applied to a generic potential invariant under the…
A J^PG=1++ Charged Resonance in the Y(4260) to pi+pi- J/psi Decay?
R. Faccini, L. Maiani, F. Piccinini +3
New BES and Belle data show a peak in the Y(4260) decay into J/psi plus one charged pion. We point out that the peak might correspond to a charged resonance at about 3880 MeV predi…
Heavier Higgs Particles: Indications from Minimal Supersymmetry
L. Maiani, A. D. Polosa, V. Riquer
We use the most recent data on the Higgs-like resonance h observed at 125 GeV to derive information about the mass of the heavier Higgs particles predicted by Minimal Supersymmetry…
Probing Minimal Supersymmetry at the LHC with the Higgs Boson Masses
L. Maiani, A. D. Polosa, V. Riquer
ATLAS and CMS report indications of a Higgs boson at M_h 125 GeV. In addition, CMS data show a tenuous bump in the ZZ channel, at about 320 GeV. We make the bold assumption that it…
A Theory of Scalar Mesons
G. 't Hooft, G. Isidori, L. Maiani +2
We discuss the effect of the instanton induced, six-fermion effective Lagrangian on the decays of the lightest scalar mesons in the diquark--antidiquark picture. This addition allo…
Indications of a Four-Quark Structure for the X(3872) and X(3876) Particles from Recent Belle and BABAR Data
L. Maiani, A. D. Polosa, V. Riquer
Recent results by BELLE and BaBar point to the existence of a second X particle decaying in D^0 D^0bar pi^0, a few MeV above the X(3872). We identify the two X states with the neut…
Structure of Light Scalar Mesons from D_s and D^0 Non-Leptonic Decays
L. Maiani, A. D. Polosa, V. Riquer
Non-leptonic D meson decays may provide a reliable testbed for the multiquark interpretation of light scalar mesons. In this letter we consider D_s decay and show that a 4-quark f_…
Counting valence quarks at RHIC and LHC
L. Maiani, A. D. Polosa, V. Riquer +1
We consider the Nuclear Modification Ratios in heavy ion collisions, R_CP and R_AA, in the region of intermediate transverse momentum, and study the dependency upon the constituent…