[PDF] Top 20 Experimental techniques in hadron spectroscopy

... Despite the COMPASS result, the hadron physics community is not yet convinced that such a state exists. This is due to the fact that similar searches led to di ff erent results. For instance, at the Je ff erson ... See full document

... (parametrized by σ 2 ) on high-momentum modes. The level of quark smearing is increased by low- ering the cutoff, thereby excluding more Laplacian eigenmodes. To evaluate hadronic correlation functions involving ... See full document

... For a general introduction to dispersive techniques, we refer to Refs. [80, 81, 82]. Briefly, in terms of physics, DRs are a consequence of causality, which mathematically allows us to analytically extend the ... See full document

... ent experimental techniques: X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectro- scopy (FTIR), electrokinetic analysis were used for the characterization of surface chemistry ... See full document

... Such experimental situation requires more theoretical efforts in order to unveil the nature of these resonances. Remarking that the X(3872), X(3940), X(3915), X(3860), X(3930) and Y (3940) reso- nances all belong ... See full document

... kinematics), the two-pion production for the charged case π − γ → π − π + π − has been analysed [6]. Figure 3 (left) shows the mass spectrum of the outgoing three-pion final state. Of particular in- terest in view of ... See full document

... more phase space. Or we can take data beyond 4.6 GeV, the present upper limit of BEPCII, to study higher mass exotic hadrons. Now the research and design of enhance the BEPCII upper limit energy is on-going. Or other ... See full document

... For a general introduction to dispersive techniques, we refer to Refs. [80–82]. Briefly, in terms of physics, DRs are a consequence of causality, which mathematically allows us to analytically extend the ... See full document

... Early lattice investigations of the X(3872) are described in Refs. [21–23] and summarised in Fig- ure 4. These studies considered D D ¯ ∗ scattering using the Lüscher approach and find a pole just below threshold, in ... See full document

... During the past few years, the lattice QCD provided rigorous results on the hadrons that lie close and above strong-decay thresholds. Verification of the approach on the conventional hadrons is the first important step ... See full document

... and consequently the positive and negative-parity states lie in the same trajectory consistent with the experimental results, as depicted in Fig. 2d. The newly found state, the N(1875) [23], depicted in Fig. 2c is ... See full document

... Abstract. Since ten years ago experiments have been observing a host of exotic states decaying into heavy quarkonia. The interpretation of most of them still remains uncertain and, in some cases, controversial. Notwith- ... See full document

... considerable experimental evidence has been collected about the existence of new states, ly- ing in the charmonium mass range, but not fitting well the charmonium mass spectrum ... See full document

... The experimental results for the meson sector and for the ground state baryons are in a good agreement with this description, while the interpretation of the excited baryonic spectrum is much less ... See full document

... X(4140) mass peak, with width Γ = 11.7 MeV [12]. Much larger widths are expected for charmo- nium states at this mass, therefore it has been suggested that the X(4140) peak could be a molecular state, a tetraquark state, ... See full document

... light hadron and charmonium spectroscopy, as well as charmonium decays ...reported experimental results, the first error and second error will be statistical and systematic, respectively, if they are ... See full document

... In the simple quark model, only two types of quark combinations are required to account for the exist- ing hadrons, i.e. q q ¯ combinations form mesons, while baryons are made up of three quarks. However, in the quark ... See full document

... Based on the data samples taken at the BESIII detector from 2008 to 2012, the the recent results on the study of XYZ particles, light hadron spectroscopy, charmonium decays and charm dec[r] ... See full document

... of hadron spectroscopy had enormous success in the latter part of the twentieth century, when the charmonium (c¯ c) and bottomonium (b b) mesons were discovered and it ¯ was established that the mass ... See full document

... Using both theoretical and experimental arguments, we have shown that the SELEX and the LHCb results for the production of double-charm baryons can both be correct. We have com- pared the data for double J/ψ ... See full document