Hadron Spectroscopy at PANDA

FAIR a new International Facility for Antiproton and Ion Reaserach, is under construction at Darmstadt, in Germany. This will provide scientists in the world with outstanding beams and experimental conditions for studying matter at the level of atoms, nuclei, and other subnuclear constituents. An antiproton beam with intensity up to 2x10$^7$ $\bar{p}/s$ and high momentum resolution will be available at the High Energy Storage Ring (HESR) where the $\bar{P}$ANDA (Antiproton Annihilation At Darmstadt) detector will be installed. In this paper we will illustrate the details of the $\bar{P}$ANDA scientific program related to hadron spectroscopy, after a brief introduction about the FAIR facility and the $\bar{P}$ANDA detector.Comment: 4 pages, 1 figure. Proceeding for The 8th International Workshop on the Physics of Excited Nucleons, May 17-20 (2011), Thomas Jefferson National Accelerator Facility, Newport News, Virginia US

Charmonium and charmonium-like results from Babar

We present new results on charmonium and charmonium-like states from the BaBar experiment located at the PEP-II asymmetric energy $e^+e^-$ storage ring at the SLAC National Accelerator Laboratory.Comment: 4 pages, 4 figures, Contributed to the Proceedings of XX International Workshop on Deep Inelastic Scattering and related Subjects,26-30 March 2012, University of Bon

16th International Conference in Quantum ChromoDynamics: Charmonium-like states at BaBar

We present new results on charmonium-like states from the BaBar experiment located at the PEP-II asymmetric energy $e^+e^-$ collider at the SLAC National Accelerator Laboratory.Comment: 3 pages, 4 figures, 16th International Conference in Quantum ChromoDynamic

Study of double charmonium production in the baBaR experiment

Prompt production of J/Ψ or Ψ(2S) in association with a second charmonium state has been observed by both the BABAR and Belle experiments in e⁺e⁻ annihilation around √s = 10.58 GeV. These processes provide an opportunity to study both perturbative and non-perturbative effects in QCD and to search for new charmonium states recoiling against the reconstructed J/Ψ or Ψ(2S). In this thesis I present a study of such events using the full BABAR dataset, where J/Ψ and Ψ(2S) are reconstructed via the decays J/Ψ → ℓ⁺ℓ⁻, Ψ(2S) → J/ΨΠ⁺Π⁻, and Ψ(2S) → ℓ⁺ℓ⁻. (ℓ⁺ℓ⁻ = e⁺e⁻, μ⁺μ⁻

Exact entanglement entropy of the XYZ model and its sine-Gordon limit

We obtain the exact expression for the Von Neumann entropy for an infinite bipartition of the XYZ model, by connecting its reduced density matrix to the corner transfer matrix of the eight vertex model. Then we consider the anisotropic scaling limit of the XYZ chain that yields the 1+1 dimensional sine-Gordon model. We present the formula for the entanglement entropy of the latter, which has the structure of a dominant logarithmic term plus a constant, in agreement with what is generally expected for a massive quantum field theory.Comment: 13 pages, 1 figure - v2: typos corrected - v3: some references and comments of sine-Gordon result added - v4: typos correcte

Freezing of gait in Parkinson’s disease patients treated with bilateral subthalamic nucleus deep brain stimulation: A long-term overview

Bilateral subthalamic nucleus deep brain stimulation (STN-DBS) is an effective treatment in advanced Parkinson’s Disease (PD). However, the effects of STN-DBS on freezing of gait (FOG) are still debated, particularly in the long-term follow-up (>/=5-years). The main aim of the current study is to evaluate the long-term effects of STN-DBS on FOG. Twenty STN-DBS treated PD patients were included. Each patient was assessed before surgery through a detailed neurological evaluation, including FOG score, and reevaluated in the long-term (median follow-up: 5-years) in different stimulation and drug conditions. In the long term follow-up, FOG score significantly worsened in the off-stimulation/off-medication condition compared with the preoperative off-medication assessment (z = -1.930; p = 0.05) but not in the on-stimulation/off-medication (z = -0.357; p = 0.721). There was also a significant improvement of FOG at long-term assessment by comparing on-stimulation/off-medication and off-stimulation/off-medication conditions (z = -2.944; p = 0.003). These results highlight the possible beneficial long-term effects of STN-DBS on FOG

Freezing of Gait in Parkinson's Disease Patients Treated with Bilateral Subthalamic Nucleus Deep Brain Stimulation: A Long-Term Overview

Bilateral subthalamic nucleus deep brain stimulation (STN-DBS) is an effective treatment in advanced Parkinson's Disease (PD). However, the effects of STN-DBS on freezing of gait (FOG) are still debated, particularly in the long-term follow-up (≥5-years). The main aim of the current study is to evaluate the long-term effects of STN-DBS on FOG. Twenty STN-DBS treated PD patients were included. Each patient was assessed before surgery through a detailed neurological evaluation, including FOG score, and revaluated in the long-term (median follow-up: 5-years) in different stimulation and drug conditions. In the long term follow-up, FOG score significantly worsened in the off-stimulation/off-medication condition compared with the pre-operative off-medication assessment (z = -1.930; p = 0.05) but not in the on-stimulation/off-medication (z = -0.357; p = 0.721). There was also a significant improvement of FOG at long-term assessment by comparing on-stimulation/off-medication and off-stimulation/off-medication conditions (z = -2.944; p = 0.003). These results highlight the possible beneficial long-term effects of STN-DBS on FOG

GEN-O-MA project: an Italian network studying clinical course and pathogenic pathways of moyamoya disease—study protocol and preliminary results

Background: GENetics of mOyaMoyA (GEN-O-MA) project is a multicenter observational study implemented in Italy aimed at creating a network of centers involved in moyamoya angiopathy (MA) care and research and at collecting a large series and bio-repository of MA patients, finally aimed at describing the disease phenotype and clinical course as well as at identifying biological or cellular markers for disease progression. The present paper resumes the most important study methodological issues and preliminary results. Methods: Nineteen centers are participating to the study. Patients with both bilateral and unilateral radiologically defined MA are included in the study. For each patient, detailed demographic and clinical as well as neuroimaging data are being collected. When available, biological samples (blood, DNA, CSF, middle cerebral artery samples) are being also collected for biological and cellular studies. Results: Ninety-eight patients (age of onset mean ± SD 35.5 ± 19.6 years; 68.4% females) have been collected so far. 65.3% of patients presented ischemic (50%) and haemorrhagic (15.3%) stroke. A higher female predominance concomitantly with a similar age of onset and clinical features to what was reported in previous studies on Western patients has been confirmed. Conclusion: An accurate and detailed clinical and neuroimaging classification represents the best strategy to provide the characterization of the disease phenotype and clinical course. The collection of a large number of biological samples will permit the identification of biological markers and genetic factors associated with the disease susceptibility in Italy

Indici per la valutazione della qualit? ecologica dei laghi

Collection of methods to evaluate lake quality using biological element