Determination of Scanning Efficiencies in Experiments Using Nuclear Emulsion Sheets

During their exposure, nuclear emulsion sheets detect both tracks from experiment-related particles, as well as a considerable amount of background tracks, mainly due to cosmic rays. Unless the exposure has been fairly short, it is therefore fairly likely that a fraction of the tracks that have been identified as belonging to the particles the experiment is interested in, are really due to background. A method, which allows to measure this fraction reliably directly from the data, is described.Comment: 7 pages, uses elsart, to be published in NIMA 450, p 44

Experimental study of quasi-elastic neutrino interactions on Ar with a liquid Ar TPC exposed to the WANF neutrino beam

We present results from the first exposure of a liquid Ar time projection chamber to a neutrino beam. The data have been collected in 1997 with a 50 liter ICARUS-like chamber located between the CHORUS and NOMAD experiment at the CERN West Area Neutrino Facility. We focus on the analysis of quasi-elastic interactions; despite the limited size of the detector, nuclear effects beyond Fermi motion and Pauli blocking have been observed as perturbations to the pure quasi-elastic kinematics.Comment: 6 pages, 4 figures, prepared for the proceedings of NuInt0

Stabilizing the Pyramid of Intervention

The pyramid of interventions (POI) is based on providing students with responses that help teach new skills. It is well established for academics. Programs and strategies abound in order to teach a student to read fluently, comprehend on grade level, and complete math computations. However, the pyramid still is challenging when students exhibit behavior difficulties. Many professionals do not see how behavior difficulties fit into the POI, nor do they know what to do. They do not know how to approach a lack of behavior or social skills in a way that teaches the student what is acceptable in schools. Many educators have trouble recognizing when Tier 1 interventions are enough, or when to move beyond the basics in order to support a student and help them grow. This session will show the parallel between the academic pyramid of interventions and the behavioral one. It will highlight the various tiers and provide ideas of what can be done from Tier 1 through Tier 3. (Note: Tier 4 is considered Special Education in Georgia.) Research based interventions to teach students appropriate behaviors will be provided. This session will also take a look at how the pyramid often topples over when educators need to deal with students that exhibit behavior difficulties. Common pitfalls will be brought out and discussed. Then, ways to circumvent these pitfalls to stabilize the pyramid will be explored. As educators move forward to provide teaching opportunities for students with behavior difficulties, they often look at the behaviors at school as separate from those at home. However, parents should also be included in the process. This session will show how to do this effectively so home and school can work as a team to provide skills for the student in order to teach appropriate behavior and social skills. The Power of Positive Strategies is effective to help students with a full team approach

Recipe for Success

Today we’re going to cook up recipes for effective positive behavior support. You will be given the basic ingredients that contribute to Tier 1 {SWPBIS) success. These include some school wide strategies that have been found effective both by teachers and administrators. You’ll see pictures and videos of what is happening at one school in Georgia. Then, we’ll look at the special ingredients needed for Tier 2 interventions. Special ingredients add both sugar and spice to our recipe for success. These include ways to monitor student progress as well as techniques that help determine the function of behavior and motivation for students who struggle with acceptable social skills. Before leaving, you’ll discover special “cooking” techniques and equipment to help those in the upper tiers for PBIS. You’ll be provided with slow cooker recipes that will help students succeed with long term goals as well as the Instapot recipes to teach social skills that are immediately needed in the school environment. You’ll go home with a full recipe book of ideas. Be prepared to put on your chef hat at we work our way around the PBIS kitchen

Be the Difference

Often, educators feel alone when they are working with students that have behavior difficulties. They want to do what is right for the student, but often think no one understands how much time and effort they are putting in to help the child succeed. As a result, they are left discouraged and angry with other educators and even the child they so desperately want to help. This session is designed to emphasize the positive supports needed for the educator as well as for the student. In this session, educators will be able to hear success stories that demonstrate how positive supports and strategies are successful. The stories will emphasize both how the supports help students with short term goals for social and behavior improvements as well as give examples of long term success with students. The session will strengthen the idea “Be the Difference” when working with students in a positive, proactive manner. Parents and community members will also benefit from this session by listening to how cooperation between various components of our society has helped students in the past

MC generators in CHORUS

This note presents an overview of general-purpose and specific Monte-Carlo event generators used in the simulation of the CERN - CHORUS experiment, aiming to search for $\nu_{\mu} \to \nu_{\tau}$ oscillations and charm particle decays in an emulsion target.Comment: 6 pages, LaTeX two-column format, 2 encapsulated postscript figures Proceedings of NuInt01 Workshop (KEK, Tsukuba, Japan, 13-16.12.2001

Detecting the (Quasi-)Two-Body Decays of τ\tau Leptons in Short-Baseline Neutrino Oscillation Experiments

Novel detector schemes are proposed for the short-baseline neutrino experiments of next generation, aimed at exploring the large-$\Delta m^2$ domain of \omutau oscillations in the appearance mode. These schemes emphasize good spectrometry for charged particles and for electromagnetic showers and efficient reconstruction of \ypi_gg decays. The basic elements are a sequence of relatively thin emulsion targets, immersed in magnetic field and interspersed with electronic trackers, and a fine-grained electromagnetic calorimeter built of lead glass. These elements act as an integral whole in reconstructing the electromagnetic showers. This conceptual scheme shows good performance in identifying the $\tau$ (quasi-)two-body decays by their characteristic kinematics and in selecting the electronic decays of the $\tau$.Comment: 34 pages, 8 figure

ν−K0\nu - K^0 Analogy, Dirac-Majorana Neutrino Duality and the Neutrino Oscillations

The intent of this paper is to convey a new primary physical idea of a Dirac-Majorana neutrino duality in relation to the topical problem of neutrino oscillations. In view of the new atmospheric, solar and the LSND neutrino oscillation data, the Pontecorvo $\nu - K^0$ oscillation analogy is generalized to the notion of neutrino duality with substantially different physical meaning ascribed to the long-baseline and the short-baseline neutrino oscillations. At the level of CP-invariance, the suggestion of dual neutrino properties defines the symmetric two-mixing-angle form of the widely discussed four-neutrino $(2+2)$-mixing scheme, as a result of the lepton charge conservation selection rule and a minimum of two Dirac neutrino fields. With neutrino duality, the two-doublet structure of the Majorana neutrino mass spectrum is a vestige of the two-Dirac-neutrino origin. The fine neutrino mass doublet structure is natural because it is produced by a lepton charge symmetry violating perturbation on a zero-approximation system of two twofold mass-degenerate Dirac neutrino-antineutrino pairs. A set of inferences related to the neutrino oscillation phenomenology in vacuum is considered.Comment: 13 pages, LaTeX. Minor modifications, new references adde

Atmospheric neutrino data : Active-Active ×\times Active-Sterile oscillations

I summarize here the results of a global fit to the full data set corresponding to 33.0 kt-yr of data of the Super-Kamiokande experiment as well as to all other experiments in order to compare the active-active and active-sterile neutrinos oscillation channels to the atmospheric neutrino anomaly.Comment: 3 pages, uses espcrc2.sty (Nuclear Physics style) and epsfig.sty, 2 PS files. To appear in the Proceedings of the XTH Int. Symposium on Very High Energy Cosmic Ray Interactions, Laboratory Nazionali del Gran Sasso, Assergi, Italy, July 12-17 199

New limits on radiative sterile neutrino decays from a search for single photons in neutrino interactions

It has been recently shown that excess events observed by the LSND and MiniBooNE neutrino experiments could be interpreted as a signal from the radiative decay of a heavy sterile neutrino \nu_h produced in \nu_\mu neutral current-like interactions. If the \nu_h exist, it would be also produced by the \nu_\mu beam from the CERN SPS in the neutrino beam line shielding. The \nu_h's would penetrate the shielding and be observed through the decay \nu_h -> \nu \gamma, followed by the photon conversion into e+e- pair in the active target of the NOMAD detector. The \nu_h's could be also produced in the iron of the magnetic spectrometer of the CHORUS detector, located just in front of NOMAD. Considering these two sources of \nu_h's we set new constraints on \nu_h properties and exclude part of the LSND/MiniBooNE \nu_h parameter space using bounds on single photons production in neutrino reactions recently reported by the NOMAD collaboration. We find that broad bands in the parameter space are still open for more sensitive searches for the \nu_h in future neutrino experiments.Comment: 10 pages, 5 figures. Revised version to appear in PLB. Discussion of dominant NC-like production of \nu_h's adde