Measurement of the eta->pi+pi-pi0 decay with WASA-at-COSY detector

One of the objectives of the physics programme of the WASA-at-COSY facility is to study the isospin violating eta hadronic decays into pi+pi-pi0$ systems driven by the term of QCD Lagrangian which depends on the d and u quark mass difference. These studies can be made in terms of the Dalitz plot parameters describing the density population which is proportional to the square of the amplitude |A(x,y)|^2. This contribution describes the current status of the analysis of the eta->pi+pi-pi0 decay in the pd->3He eta and as well in the pp->pp eta reaction with WASA-at-COSY

Radiative decays of light mesons

I review present experimental and theoretical status of electromagnetic decays of light mesons. Special attention is paid to single-photon decays of charged resonances, and to recent applications of the Primakoff technique to measure such processes. New data on radiative decays of pseudoscalar, vector, axial and tensor mesons are compared with several theoretical calculations involving quark models, unitary symmetry relations, and an effective Lagrangian approach. Vector Meson Dominance ideas, as applied to meson spectroscopy, are discussed in detail. Also, the electromagnetic properties of the A$_{1}$ meson are examined in the context of resonance parameters observed in diffractive production and $\tau$-lepton decays. Finally, I emphasize the importance of radiative processes in searching for glueball and hybrid states of matter

Coherent production on nuclei and measurements of total cross sections for unstable particles

The Kölbig–Margolis formula is fitted to some explicitly nonperturbative models of diffractive production. It is shown that, in spite of the fact that the standard procedure of fitting the integrated cross sections may give acceptable fits, thus obtained "cross sections of unstable particles", $\sigma_{2}$, grossly disagree with the "true" cross sections known exactly from the models

Elastic p-p cross-section and longitudinal motion of quarks

We show that quark longitudinal degrees of freedom are important for the shape of the elastic p–p cross-section calculated in the dressed quark model using Glauber multiple scattering expansion. We find also that in this model multiple scattering terms are greater than required by data

Adaptable Service Oriented Infrastructure Provisioning with Lightweight Containers Virtualization Technology

Modern computing infrastructures should enable realization of converged provisioning and governance operations on virtualized computing, storage and network resources used on behalf of users' workloads. These workloads must have ensured sufficient access to the resources to satisfy required QoS. This requires flexible platforms providing functionality for construction, activation and governance of Runtime Infrastructure which can be realized according to Service Oriented Infrastructure (SOI) paradigm. Implementation of the SOI management framework requires definition of flexible architecture and utilization of advanced software engineering and policy-based techniques. The paper presents an Adaptable SOI Provisioning Platform which supports adaptable SOI provisioning with lightweight virtualization, compliant with the structured process model suitable for construction, activation and governance of IT environments. The requirements, architecture and implementation of the platform are all discussed. Practical usage of the platform is presented on the basis of a complex case study for provisioning JEE middleware on top of the Solaris 10 lightweight virtualization platform

Urgent analgo-sedation of a patient with polytrauma done by a basic medical emergency team in prehospital care

Medical Rescue Teams during their daily work often face the need to analgo-sedate patients, the victims of road accidents. This is especially important in patients with cranial and brain trauma and is designed to prevent secondary damage to the brain. This procedure should begin as early as the prehospital phase at the scene or during transport to a Hospital Emergency Department. In the light of the Law on State Emergency Medical Teams, basic crews themselves cannot give drugs to provide urgent analgo-sedation and brain protection. The case describes a 65-year-old patient, a participant in a traffic accident, in whom the initial examination showed multiple traumatic injuries, of which injury to the chest and head trauma proved to be the most dangerous. During pre-hospital activities, due to a significant deterioration of the patient and the emergence of life-threatening symptoms, it was necessary to implement emergency rescue procedures. There was a pneumothorax, possible to decompress by members of the basic Medical Rescue Team, as well as increasing psychomotor agitation with indications for urgent analgo-sedation requiring the consent of a coordinating physician at the Crisis Management Centre. The coordinating doctor consented to the administration of Mannitol and Thiopental to protect the central nervous system (CNS) of the casualty. Neither drug is on the list of drugs that may be administered by paramedics alone. They must be authorised by a doctor, whose decision, in this case, undoubtedly contributed to increasing the chances of the patient's survival, safe delivery to a Hospital Emergency Department, transfer to the Department of Intensive Care Medicine, and the Department of Trauma Surgery

Phonon-induced and phonon-free superconductivity in correlated systems : Eliashberg equations for the two-dimensional Hubbard model

The problem of phonon-induced and phonon-free superconductivity in the two-dimensional Hubbard model has been addressed. We have generalized the Eliashberg equations to account for both on-site and intersite pairing and consider the electron–electron and electron-phonon channel on an equal footing. This approach allows for the discussion of pairing and depairing properties of the local repulsive interaction. We demonstrate the possibility of cooperation between electron-phonon and electron–electron interaction in the stabilization of the d-wave superconductivity, in particular close to the experimental value of optimal doping ( ≃ 0.15). We have also discussed the problem of phonon-induced superconductivity in the two-dimensional Hubbard model close to the metal-insulator transition. Here, the Coulomb correlations have been incorporated within the Hubbard I approximation whereas the superconductivity is treated by the Eliashberg scheme. The results support the view that a d-wave component dominates in the gap function

Polarization determination for the studies of the eta meson production

The dynamics of $\eta$ meson production and the interaction of $\eta$ mesons with nucleons can be studied using the $\vec{p}p\rightarrow pp\eta$ reaction via measurements of the analyzing power $A_{y}$. To this end, we have performed a measurement of the $\vec{p}p\rightarrow pp\eta$ reaction using the large acceptance and $\varphi$ symmetric WASA-at-COSY detector, for beam momenta of 2026 MeV/c and 2188 MeV/c

Production and interaction of the eta meson with nucleons and nuclei

We report on the status of the search for eta-mesic nuclei and the studies of the interaction of the eta meson with nucleons. Recently we have completed the analysis of the new WASA-at-COSY data on the production of the eta meson with polarized proton beam. New results on the analyzing power for the pp->ppeta reaction with more than an order of magnitude improved precision shed a new light on the production mechanism of the eta meson in nucleon-nucleon collisions. Also, the latest results of the search for eta-mesic nuclei are discussed.Comment: 4 pages, presented at 14th International Workshop on Meson Production, Properties and Interaction KRAK\'OW, POLAND (MESON 2016), accepted for publication in EP