Abstract
Many experiments that are conducted to study the hadron spectrum rely on peripheral resonance production. Hereby, the rapidity gap allows the process to be viewed as an independent fragmen- tation of the beam and the target, with the beam fragmentation dominated by production and decays of meson resonances. We test this separation by determining the kinematic regimes that are dominated by factorizable contributions, indicating the most favorable regions to perform this kind of experiments. In doing so, we use a Regge model to analyze the available world data of charge exchange meson production with beam momentum above 5 GeV in the laboratory frame, that are not dominated by either pion or Pomeron exchanges. We determine the Regge residues and point out the kinematic regimes which are dominated by factorizable contributions.
Highlights
The new generation of high statistics experiments e.g., Belle II, BESIII, CLAS12, CMS, COMPASS, GlueX, J-PARC, LHCb, and P ANDA, have dedicated programs to study the hadron spectrum, whose quantitative description is pivotal for a complete understanding of quantum chromodynamics (QCD)
The partial wave models (PWA) models are less constrained by the available lowenergy data, and we have shown how the high-energy data can help reduce uncertainties, those related to unnatural exchanges [12,14]
We aim to identify the kinematics for which such violations can be expected, while for processes dominated by factorizable exchanges we provide amplitudes and residues that are compatible with the world data at high energies
Summary
The new generation of high statistics experiments e.g., Belle II, BESIII, CLAS12, CMS, COMPASS, GlueX, J-PARC, LHCb, and P ANDA, have dedicated programs to study the hadron spectrum, whose quantitative description is pivotal for a complete understanding of quantum chromodynamics (QCD). We aim to identify the kinematics for which such violations can be expected, while for processes dominated by factorizable exchanges we provide amplitudes and residues that are compatible with the world data at high energies These can be used to model the production mechanism in fragmentation experiments, allowing the isolation of the resonant part intended to search for hybrids. We fix the t-dependence of the reduced residues βeμiijμj (see Eq (11) using a single-particle exchange model obtained from the effective Lagrangians as discussed in Appendices C and E We refer to this analysis as the “global SU(3)EXD fit”, which is similar to the analyses of [33,34].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
