Partial-wave analyses of KN two-body reactions between 1480 and 2170 MeV

In this paper, we present a review of recent works on weak decay of heavy mesons and baryons with two mesons, or a meson and a baryon, interacting strongly in the final state. The aim is to learn about the interaction of hadrons and how some particular resonances are produced in the reactions. It is shown that these reactions have peculiar features and act as filters for some quantum numbers which allow to identify easily some resonances and learn about their nature. The combination of basic elements of the weak interaction with the framework of the chiral unitary approach allow for an interpretation of results of many reactions and add a novel information to different aspects of the hadron interaction and the properties of dynamically generated resonances.

/pdf/weak-decays-of-heavy-hadrons-into-dynamically-generated-hq54ns7vwx.pdf

Weak decays of heavy hadrons into dynamically generated resonances

In this review we give a perspective of the theoretical work done recently on the interpretation of results from $B$, $D$, $\Lambda_b$, $\Lambda_c$ weak decays into final states that contain interacting hadrons, and how it is possible to obtain additional valuable information that is increasing our understanding of hadron interactions and the nature of many hadronic resonances. The novelty of these processes is that one begins with a clean picture at the quark level which allows one to select the basic mechanisms by means of which the process proceeds. Finally, one has a final state described in terms of quarks. To make contact with the experiments, where mesons and baryons are observed, one must hadronize, creating pairs of $q \bar q$ and writing the new states in terms of mesons and baryons. This concludes the primary hadron production in these processes. After that, the interaction of these hadrons takes place, offering a rich spectrum of resonances and special features from where it is possible to learn much about the interaction of these hadrons and the nature of many resonances in terms of the components of their wave functions.

/pdf/weak-decays-of-heavy-hadrons-into-dynamically-generated-4ui8pm2alu.pdf

Experimental search for pentaquarks

Elastic scattering and two-body annihilations at 5 GeV/c

Resonance formation in the reactions K−p → K+ξ− and K−p → KOξO in the mass region from 1915 to 2168 MeV

K−p elastic and charge-exchange scattering in the c.m. energy range 1915–2168 MeV

We present the results on total channel cross-sections obtained in the Saclay 180 l HBC exposed to a separated K− beam at Nimrod. The cross-sections for each channel are given at 13 incident K− momenta between 1.26 and 1.84 GeV/c.

E. Pauli

Papers

Resonance formation in the reactions K−p → K+ξ− and K−p → KOξO in the mass region from 1915 to 2168 MeV

K−p elastic and charge-exchange scattering in the c.m. energy range 1915–2168 MeV

Channel cross-sections of K−p reactions from 1.26 to 1.84 GeV/c

Properties of the inelastic K + p reactions between 1.2 and 1.7 GeV/c