[PDF] Top 20 Precision Meson Spectroscopy at COMPASS

... and Spectroscopy (COM- PASS) [22] is a fixed-target experiment at the CERN Super Proton Synchrotron (SPS) and is well suited for this task: It is a two-stage spectrometer built to measure at high beam ...enables ... See full document

... Lattice QCD is an ab initio approach, in which the QCD equations of motion are discretized on a 4-dimensional space-time lattice and solved by means of large-scale numerical simulations on big computers. Over the past ... See full document

... There are many states that have been observed so far in the light meson sector, whereas quite some of the observations still need confirmation. Comparing the experimental situation to the predictions based on the ... See full document

... Abstract. COMPASS is a multi-purpose fixed-target experiment at the CERN Super Pro- ton Synchrotron aimed at studying the structure and spectrum of ...the COMPASS experiment an excellent device to study the ... See full document

... mentum L=1 and L=0, as predicted by the flux tube model [10]. However some inconsistencies in the observed production mechanisms and negative results reported by other Collaborations [18, 19] de- mand for additional ... See full document

... hadron spectroscopy. Precision calculations of the low-lying mesons and baryons, with all systematic uncertainties under control are now ...numerical precision in current calculations is already very ... See full document

... The Partial-Wave Analysis performed is not just able to extract the gross features of the spectra, but can resolve contributions down to the sub-percent level. One of these waves is 4 ++ 1 + ρ(770) π G, depicted in Fig. ... See full document

... From Sect. 2.1 we know that the X(1835) has the same J PC number as the X(p p) does. If the ¯ X(1835) is really a p p ¯ bound state, it should have a strong coupling to 0 − p p ¯ systems, in which case the line shape of ... See full document

... Abstract. Recent progress in baryon spectroscopy is reviewed. In a common effort, various groups have an- alyzed a set of new high-precision polarization observables from ELSA. The Jülich-Bonn group has ... See full document

... statistical precision an excited spectrum of single-particle isoscalar mesons using lattice QCD, including states of high spin and, for the first time, light exotic J PC ... See full document

... and COMPASS both have already accumulated huge statistical samples and will continue to take data to probe the meson spectrum with unprecedented ...the meson spectrum using linearly polarized real ... See full document

... high precision calculations with successively finer lattice spacings and so with increasing computation cost; this is not practical with currently available ... See full document

... [2] G. Xu, Scalar Mesons at BESIII, Proceedings of Confinement X (2012) [3] C. Daum et al., Phys. Lett. 89B, 276 (1980); Phys. Lett. 89B, 281 (1980) [4] P. Abbon et al. (COMPASS), Nucl. Instrum. Meth. A 577, ... See full document

... the COMPASS collaboration [8, 9], employing the known free decay of kaon beam component, are in principle applicable, however have not yet been established for reactions with neutral particles in the final state as ... See full document

... [9] M. Aghasyan et al. (COMPASS Collaboration), Phys. Rev. D 98, 092003 (2018) [10] C. Adolph et al. (COMPASS Collaboration), Phys. Rev. D95, 032004 (2017) [11] C. Adolph et al. (COMPASS ... See full document

... the COMPASS experiment at CERN is to study the structure and dynamics of ...The spectroscopy of light mesons is performed with negative (mostly π − ) and positive (p, π + ) hadron beams with a momentum of ... See full document

... isovector(grey) meson spectrum using m π ∼ ...hybrid meson states are indicated by the blue frames with the exotics grouped on the right hand side of the ... See full document

... that spectroscopy is becoming a very precise and versatile tool for establishing the validity of the AdS/CFT duality conjecture on a quantitative, dynamical ... See full document

... hadronic molecules, respectively; heavy-quark spin symmetry predicts that the binding ener- gies are independent of the heavy meson spin up to an uncertainty of about 10%. Moreover, there are two resonances in the ... See full document

... reaction for the production of the pionic atoms as the method of the reaction spectroscopy was es- tablished in the former experiments [11–14]. The Q-value of the reaction was precisely measured to deduce the mass ... See full document