PARSIFAL (PARametrized SImulation by Farinelli And Lavezzi) is a fast and reliable software tool that reproduces the complete response of a triple-GEM detector to the passage of a charged particle, ...taking into account the main physical effects. Starting from the detector configuration and the particle information, PARSIFAL reproduces ionization, spatial and temporal diffusion, effect of magnetic field, if present, and GEM amplification to provide the dependable triple-GEM detector response. In the design and optimization stages of this kind of detectors, simulations play an important role. Accurate and robust software programs, such as GARFIELD++, can simulate the transport of electrons and ions in a gas medium and their interaction with the electric field, but they are CPU-time consuming. The necessity to reduce the processing time while maintaining the precision of a full simulation is the main driver of this work. For a given set of geometrical and electrical settings, GARFIELD++ is run once-and-for-all to provide the input parameters for PARSIFAL. Once PARSIFAL is initialized and run, it produces the detector output, including the signal induction and the output of the electronics. The results of the analysis of the simulated data obtained with PARSIFAL are compared with the results of the experimental data collected during a testbeam: some tuning factors are applied to the simulation to improve the agreement. This paper describes the structure of the code and the methodology used to match the output to the experimental data.
The aim of the study is to appraise the prevalence of the mild defects of the spine or paramorphysm in a normal paediatric population, without orthopaedic pathology, and to verify the possible ...association with the dysfunctions of the dental apparatus. The recovery of a real association among these pathologies could furnish a sprout for a correct therapeutic approach. In the study 428 subjects (211 females and 217 males), aged 9 to 14 years, have been analyzed. The data have been recorded on special schedules, orthopaedic and orthodontic, containing the number of progressive order and the initials of name and last name, in the respect of the privacy of the subjects. From the study a 2.8% scoliosis incidence has emerged, an incidence of scoliotic attitudes 9.5% and an incidence of 83% normality deviations. As deviations by the normality have been classified the isolated skeletal asymmetries, agreements as varying functional not yet pathological, for instance scapular or flank asymmetry, mild genu varum or valgum, femoral anteversion. A statistically significant relationship among that disorders of posture and malocclusion (P < 0.005) and ogival palate (P < 0.002) has been found. Despite these correlations, it is very difficult to explain this association from the point of view of etiopathogenesis. For this we hold to have to continue the study, to give a meaning to such correlations and to find an appropriate therapy.
Correlated Λd pairs emitted after the absorption of negative kaons at rest Kstop−A→ΛdA′ in light nuclei 6Li and 12C are studied. Λ-hyperons and deuterons are found to be preferentially emitted in ...opposite directions. The Λd invariant mass spectrum of 6Li shows a bump whose mass is 3251±6 MeV/c2. The bump mass (binding energy), width and yield are reported. The appearance of a bump is discussed in the realm of the K¯3N clustering process in nuclei. The experiment was performed with the FINUDA spectrometer at DAΦNE (LNF).
The results of a measurement of the proton spectra following the non-mesonic weak decay of 5ΛHe, 7ΛLi and 12ΛC are presented and discussed. The experiment was performed at the (e+e−) collider DAΦNE ...at Laboratori Nazionale di Frascati of INFN. It is the first measurement for 7ΛLi, and for all the spectra the lower limit on the energy of the protons is 15 MeV, never reached before. All the spectra show a similar shape, namely a peak at around 80 MeV as expected for the free Λp→np weak reaction, with a low energy rise that should be due to final state interactions and/or two-nucleon induced weak processes. The decay spectrum of 5ΛHe is somehow similar to the ones reported by previous measurements and theoretical calculations, but the same does not happen for the 12ΛC one.
The narrow dip observed at 1.9 GeV/c2 by the Fermilab experiment E687 in diffractive photoproduction of 3π+3π− is examined. The E687 data are refitted, a mechanism is proposed to explain why this ...resonance appears as a dip, and possible interpretations are discussed.
Using a high statistics sample of photo-produced charm particles from the FOCUS experiment at Fermilab, we report on the measurement of the ratio of semileptonic rates ...Γ(D+→Kπμ+νμ)/Γ(D+→K¯0μ+νμ)=0.625±0.045±0.034. Allowing for the Kπ S-wave interference measured in J.M. Link, et al., FOCUS Collaboration, Phys. Lett. B 544 (2002) 89, we extract the vector to pseudoscalar ratio Γ(D+→K¯*0μ+νμ)/Γ(D+→K¯0μ+νμ)=0.594±0.043±0.033 and the ratio Γ(D+→K¯0μ+νμ)/Γ(D+→K−π+π+)=1.019±0.076±0.065. Our results show a lower ratio for Γ(D→K*ℓν)/Γ(D→Kℓν) than has been reported recently and indicate the current world average branching fractions for the decays D+→K¯0(μ+,e+)νμ,e are low. Using the world average B(D+→K−π+π+) K. Hagiwara, et al., Particle Data Group Collaboration, Phys. Rev. D 66 (2002) 010001, and 2003 partial update for edition 2004 (http://pdg.lbl.gov) we extract B(D+→K¯0μ+ν)=(9.27±0.69±0.59±0.61)%.
We present the first search for the leptonic decays $D^{*+}\to e^+\nu_e$ and
$D^{*+}\to \mu^+\nu_\mu$ by analyzing a data sample of electron-positron
collisions recorded with the BESIII detector at ...center-of-mass energies between
4.178 and 4.226 GeV, corresponding to an integrated luminosity of
6.32~fb$^{-1}$. No significant signal is observed. The upper limits on the
branching fractions for $D^{*+}\to e^+\nu_e$ and $D^{*+}\to \mu^+\nu_\mu$ are
set to be $1.1 \times 10^{-5}$ and $4.3 \times 10^{-6}$ at 90\% confidence
level, respectively.
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