Upper limits for a narrow resonance in the reaction p + p -> K^+ + (Lambda p)

The reaction pp -> K^+ + (Lambda p) has been measured at T_p = 1.953 GeV and \Theta = 0 deg with a high missing mass resolution in order to study the Lambda p final state interaction. Narrow S = -1 resonances predicted by bag model calculations are not visible in the missing mass spectrum. Small structures observed in a previous experiment are not confirmed. Upper limits for the production cross section of a narrow resonance are deduced for missing masses between 2058 and 2105 MeV/c^2.Comment: 8 pages, 5 figure

Detailed comparison of the pp -> \pi^+pn and pp -> \pi^+d reactions at 951 MeV

The positively charged pions produced in proton-proton collisions at a beam momentum of 1640 MeV/c were measured in the forward direction with a high resolution magnetic spectrograph. The missing mass distribution shows the bound state (deuteron) clearly separated from the $pn$ continuum. Despite the very good resolution, there is no evidence for any significant production of the $pn$ system in the spin-singlet state. However, the $\sigma(pp\to \pi^+pn)/\sigma(pp\to \pi^+d)$ cross section ratio is about twice as large as that predicted from $S$-wave final-state-interaction theory and it is suggested that this is due to $D$-state effects in the $pn$ system.Comment: 8 pages, 3 figure

Cross section of the pp→K+Σ+npp\to K^+\Sigma^+n reaction close to threshold

We have measured inclusive data on $K^+$-meson production in $pp$ collisions at COSY J\"ulich close to the hyperon production threshold and determined the hyperon-nucleon invariant mass spectra. The spectra were decomposed into three parts: $\Lambda p$, $\Sigma^0p$ and $\Sigma^+n$. The cross section for the $\Sigma^+n$ channel was found to be much smaller than a previous measurement in that excess energy region. The data together with previous results at higher energies are compatible with a phase space dependence.Comment: accepted by Phys. lett. B some typos correcte

High resolution study of the Lambda p final state interaction in the reaction p + p -> K+ + (Lambda p)

The reaction pp -> K+ + (Lambda p) was measured at Tp=1.953 GeV and Theta = 0 deg with a high missing mass resolution in order to study the Lambda p final state interaction. The large final state enhancement near the Lambda p threshold can be described using the standard Jost-function approach. The singlet and triplet scattering lengths and effective ranges are deduced by fitting simultaneously the Lambda p invariant mass spectrum and the total cross section data of the free Lambda p scattering.Comment: submitted to Physics Letters B, 10 pages, 3 figure

Periprocedural checklist in the catheterisation laboratory is associated with decreased rate of treatment complications

Wstęp: Współczesne oddziały kardiologii wyposażone w pracownię hemodynamiki i elektroterapii muszą stawić czoła rosnącym wymaganiom związanym z dynamicznym rozwojem zarówno procedur przezskórnych, jak i elektrofizjologicznych, które wiążą się z ryzykiem wystąpienia wielu komplikacji. Cel: Celem badania była ocena skuteczności i zasadności wprowadzenia karty bezpieczeństwa okołozabiegowego w prewencji niekorzystnych zdarzeń wśród pacjentów poddanych planowej inwazyjnej diagnostyce i leczeniu. Metody: Przeanalizowano dane 2064 pacjentów skierowanych do leczenia w okresie od maja 2011 r. do sierpnia 2012 r. Chorzy, którzy byli hospitalizowani bez inwazyjnej diagnostyki lub leczenia, nie zostali włączeni do badania. Pacjentów podzielono na dwie grupy: grupę kontrolną — 1011 chorych poddanych inwazyjnej diagnostyce i terapii przed wprowadzeniem okołozabiegowej karty bezpieczeństwa; grupę badaną — 1053 chorych poddanych inwazyjnej diagnostyce i terapii po wprowadzeniu okołozabiegowej karty bezpieczeństwa. W badanych grupach przeanalizowano występowanie niekorzystnych zdarzeń związanych z hospitalizacją i wykonanymi procedurami. Przeprowadzono również subiektywną analizę karty bezpieczeństwa przez zespół medyczny na podstawie anonimowego kwestionariusza. Wyniki: Wyjściowa charakterystyka między badanymi grupami była porównywalna, z wyjątkiem wyższego odsetka stabilnej choroby wieńcowej (50,7% vs. 39,6%; p ≤ 0,001) oraz zabiegów elektrofizjologicznych w grupie kontrolnej. Wprowadzenie karty bezpieczeństwa miało korzystny wpływ na zredukowanie niekorzystnych zdarzeń sercowo-naczyniowych (6,8% vs. 3,9%; p = 0,004), zwłaszcza krwawień (2,3% vs. 0,3%; p < 0,001). W analizie wieloczynnikowej brak okołozabiegowej karty bezpieczeństwa był niezależnym czynnikiem wpływającym na wystąpienie niekorzystnych zdarzeń sercowo-naczyniowych (OR = 2,97; 95% CI 1,60–5,53; p = 0,001). Subiektywna ocena opinii personelu medycznego pokazała, że wprowadzenie karty bezpieczeństwa koreluje z poprawą zdolności komunikacyjnych, organizacją pracy, zapobieganiem występowania błędów medycznych i zredukowanej liczby kompilacji związanych z przeprowadzonymi zabiegami. Wnioski: Wprowadzenie okołozabiegowej karty bezpieczeństwa wiązało się z istotną redukcją niekorzystnych zdarzeń sercowo-naczyniowych wśród pacjentów poddanych zabiegom inwazyjnym. Miała także pozytywny wpływ na komunikację w zespole, organizację i jakość leczenia w opinii personelu medycznego.Background: Interventional cardiology and electrophysiology are disciplines with a growing number of complex procedures, which are exposed to the occurrence of many complications. Aim: To assess efficacy and legitimacy of the periprocedural checklist in prevention of cardiovascular adverse events, in elective patients undergoing invasive diagnostic and treatment. Methods: A total of 2064 patients directed to treatment in the catheterisation laboratory between May 2011 to August 2012 were analysed. Patients who were hospitalised without invasive diagnostics and treatment were not included in the study. Patients were divided into two groups: a control group — 1011 patients with invasive diagnostics and treatment before introduction of periprocedural checklist; and an intervention group — 1053 patients with invasive diagnostics and treatment after introduction of periprocedural checklist. We analysed the studied groups, assessing adverse events associated with hospitalisation and performed procedures. We also conducted subjective evaluation of checklists by medical staff on the basis of a questionnaire. Results: Baseline characteristics between the studied groups were comparable except for a higher rate of stable coronary artery disease (50.7% vs. 39.6%, p £ 0.001) and electrophysiology procedures in the control group. Implementation of a checklist was favourable in cases of decreased adverse events (6.8% vs. 3.9%, p = 0.004) especially bleedings (2.3% vs. 0.3%, p < 0.001). Multivariate analysis confirmed that lack of a periprocedural checklist during hospitalisation was an independent factor associated with a higher rate of adverse events (OR = 2.97, 95% CI 1.60–5.53, p = 0.001). Subjective evaluation of medical staff opinions showed that implementation of a checklist seems to be associated with improved communication skills, work organisation, prevention of the occurrence of medical errors, and reduced rate of complications associated with procedures. Conclusions: Introduction of a periprocedural checklist was associated with significant reduction of adverse events among patients undergoing invasive procedures. It also showed a positive influence on team communication, and organisation and quality of treatment, according to the opinions of medical staff

Study of the p+6\bm{p+^6}Li→η+7\bm{\to\eta+^7}Be reaction 11.3 MeV above threshold

The cross section for the reaction $p+^6\text{Li}\to\eta+^7\text{Be}$ was measured at an excess energy of 11.28 MeV above threshold by detecting the recoiling $^7$Be nuclei. A dedicated set of focal plane detectors was built for the magnetic spectrograph Big Karl and was used for identification and four momentum measurement of the $^7$Be. A differential cross section of $\frac{d\sigma}{d\Omega}=(0.69\pm{0.20}\text{(stat.)}\pm 0.20\text{(syst.)})\text{nb/sr}$ for the ground state plus the 1/2$^-$ was measured. The result is compared to model calculations.Comment: accepted by Phys. Rev. C as rapid communicatio

Technical Design Report for the PANDA Solenoid and Dipole Spectrometer Magnets

This document is the Technical Design Report covering the two large spectrometer magnets of the PANDA detector set-up. It shows the conceptual design of the magnets and their anticipated performance. It precedes the tender and procurement of the magnets and, hence, is subject to possible modifications arising during this process.Comment: 10 pages, 14MB, accepted by FAIR STI in May 2009, editors: Inti Lehmann (chair), Andrea Bersani, Yuri Lobanov, Jost Luehning, Jerzy Smyrski, Technical Coordiantor: Lars Schmitt, Bernd Lewandowski (deputy), Spokespersons: Ulrich Wiedner, Paola Gianotti (deputy

A precision determination of the mass of the η\eta meson

Several processes of meson production in proton-deuteron collisions have been measured simultaneously using a calibrated magnetic spectrograph. Among these processes, the $\eta$ meson is seen clearly as a sharp missing--mass peak on a slowly varying background in the $p+d\to ^3\textrm{He} +X$ reaction. Knowing the kinematics of the other reactions with well determined masses, it is possible to deduce a precise mass for the $\eta$ meson. The final result, $m(\eta)=547.311\pm 0.028 \textrm{(stat)} \pm 0.032 \textrm{(syst) MeV/c}^2$, is significantly lower than that found by the recent NA48 measurement, though it is consistent with values obtained in earlier counter experiments.Comment: 10 pages, 6 figures, Fig. 3 change

Implementation of Anaphylaxis Management Guidelines: A Register-Based Study

BACKGROUND: Anaphylaxis management guidelines recommend the use of intramuscular adrenaline in severe reactions, complemented by antihistamines and corticoids; secondary prevention includes allergen avoidance and provision of self-applicable first aid drugs. Gaps between recommendations and their implementation have been reported, but only in confined settings. Hence, we analysed nation-wide data on the management of anaphylaxis, evaluating the implementation of guidelines. METHODS: Within the anaphylaxis registry, allergy referral centres across Germany, Austria and Switzerland provided data on severe anaphylaxis cases. Based on patient records, details on reaction circumstances, diagnostic workup and treatment were collected via online questionnaire. Report of anaphylaxis through emergency physicians allowed for validation of registry data. RESULTS: 2114 severe anaphylaxis patients from 58 centres were included. 8% received adrenaline intravenously, 4% intramuscularly; 50% antihistamines, and 51% corticoids. Validation data indicated moderate underreporting of first aid drugs in the Registry. 20% received specific instructions at the time of the reaction; 81% were provided with prophylactic first aid drugs at any time. CONCLUSION: There is a distinct discrepancy between current anaphylaxis management guidelines and their implementation. To improve patient care, a revised approach for medical education and training on the management of severe anaphylaxis is warranted