While the excitation spectrum of light-meson, which are composed of up and down quarks, is already mapped out rather well, the strange-meson spectrum still holds many surprises that we need to discovered. At the COMPASS experiment at CERN, we study the spectrum of strange mesons using a negative kaon beam. The flagship channel is the decay to the $K^−\pi^−\pi^+$ final state, for which COMPASS...
At BESIII, the lineshapes of e+e- ->phi eta', phi eta, KK, omega pi0, eta pipi, omega pipi are measured from 2.0 to 3.08 GeV, where resonant structures are observed in these processes. Multiple lineshapes of intermediate state are obtained by a partial wave analysis of e+e- ->K+ K- pi0 pi0, K+K- pi0 and the structures observed provide essential input to understand the nature of phi2170. ...
I will discuss contributions from LHCb to strange hadron spectroscopy to date, and try to motivate and discuss future expansions of such programmes with the LHCb upgrade and LHCb Upgrade II detectors. The enormous data samples expected will bring opportunities for further contributions that will be covered.
I will talk on recent results on hyperon spectroscopy from the Belle experiment. The results include $\Lambda(1670)$, $\Sigma(1435)$, $\Xi(1620/1690)$, and $\Omega(2012)$. I will also discuss future prospects of the Belle II experiment.
I will provide an overview of some recent work on the spectroscopy and interactions of hadrons using first-principles lattice QCD calculations. Progress will be illustrated with a few examples of calculations of the masses and other properties of hadron resonances, including the coupling of a resonance to a photon, and scattering amplitudes. I will comment on the phenomenology suggested by the...
I plan to give an overview of GSI and FAIR, its science scope, the current status of the FAIR construction, the next steps and current developments.
The measurements of $\pi\Sigma$ mass distributions in the $\gamma p \rightarrow K^{+}\pi\Sigma$ photoproduction reaction [1] probe the energy region of the $\Lambda(1405)$ resonance, just below the $\bar{K}N$ threshold, and provide new challenges for the theoretical models of $\pi\Sigma - \bar{K}N$ coupled channels interactions. Adopting the photoproduction model presented in [2, 3] and the...
In the KbarN-piSigma coupled-channel system, two resonance states of the Lambda(1405) and Lambda(1380) states are considered to appear in the same physical Riemann sheets. To investigate the origin of these states, the detailed knowledge on the interaction is required. In this talk, we discuss the pole positions at the unphysical quark masses which can be accessed in the lattice QCD...
This talk presents results of the first coupled-channel meson-baryon $\pi\Sigma - \bar{K}N$ computation from lattice QCD in the $\Lambda(1405)$ region. Correlation functions were calculated using a single ensemble with pion mass $m_{\pi}= 200$ MeV and kaon mass $m_{\mathrm{K}}= 487$ MeV, and included single- and multi-hadron operators. Once the finite-volume energy spectra were reliably...
The existence of exotic multi-quark states beyond the conventional valence three quark and quark-antiquark systems has been unambiguously confirmed in the heavy quark sectors. Such states could manifest as single colour bound objects, or evolve from meson-baryon and meson-meson interactions, creating molecular like systems and re-scattering effects near production thresholds. Equivalent...
The GlueX experiment in Hall D at Jefferson Lab has amassed high-statistics data on photoproduction processes. By leveraging the high-intensity linearly polarized photon beam the hyperon program at GlueX has made many contributions to this sector. With these results, contributions that advance the GlueX mission of understanding hadrons have been achieved through measurements of various...
Commissioned in 2017, the CLAS12 spectrometer is the flagship detector system in Hall B at Jefferson Lab, replacing the previous spectrometer, CLAS, which operated from 1997 until 2012. CLAS12 enables large acceptance studies of electron-induced reactions using the now energy-doubled CEBAF electron beam, with access to quasi-real photoprodcution processes via the low-Q2 Forward Tagger. This...
The spectrum of excited $\Sigma$ and $\Lambda$ states is sparse with only few additions from last decade. Recently, ideas are developed how to identify the missing states using polarized photons and polarized targets. Two differents experiments are currently investigating the measurement of polarization observables for hyperon photoproduction, the CBELSA/TAPS experiment at ELSA and the GlueX...
I discus the importance of peripheral (photo)production in production of resonances.
The KLong Experiment in Jefferson Lab Hall D will use a secondary beam of neutral kaons and the GlueX experimental setup to perform strange hadron spectroscopy. By achieving a flux on the order of $1\times10^4$ $K_L$ /sec, KLF will allow a broad range of measurements that improve the statistics of previous world data by several orders of magnitude.
The experiment will measure both...
