During the years between 1994 and 1997, the emulsion target of the CHORUS experiment was exposed to the wide band neutrino beam of the CERN SPS of 27 GeV average energy collecting about 106 neutrino interactions. A measurement of induced charm production and search for anticharmed pentaquark (0 c ) have been performed by using the presence of a 6% component in the beam. By requiring a positive muon charge as determined by the CHORUS muon spectrometer, 46 -induced charm events were observed with an estimated background of 5:20:4 events. At an average antineutrino energy of 18 GeV in the neutrino beam, the charm production rate induced by is

OPERA stands for Oscillation Project with Emulsion t-Racking Apparatus. The main goal of the OPERA experiment is to search for tau neutrino appearance in almost pure muon neutrino beam. The detector is located at Gran Sasso, 730 km away from the neutrino source, at CERN. In this thesis, the reconstruction efficiency and purity of neutrino interactions in the OPERA target have been studied by using Monte Carlo simulation. The efficiency of primary vertex reconstruction for muon neutrino Charge Current (CC) events is estimated as 83.2 percent. The main source of inefficiency is due to Quasi-elastic like topologies in which only one track is reconstructed. The purity of primary vertex tracks is found to be 99 percent. On the other hand, the reconstruction efficiency for muon neutrino CC charm events is estimated to be 90.2 percent, while the purity of the primary tracks is 67 percent. The low purity is due the fact that the secondary vertex tracks are wrongly assigned in the primary vertex. This spoils the purity.

The OPERA experiment was designed to search for nu-mu to nu-tau oscillations through the observation of nu-tau charged-current interactions in the OPERA target. This search requires a massive detector and very high spatial accuracy. Both requirements are ful

In this thesis, the current vs. magnetic field relationships for four magnets, M1, M2, M3, and Hyperon of FNAL Experiment E781 (the charm baryon study) havel,een studied on the basis of algorithms involving sign corrections pertaining to remedying incorrect FNAL EPICURE readout system's current and magnetic field values for E78 I's 4 magnets.After analyzing previous BSU personnel's work involving re-averaging of the current and magnetic field output values for E78 1, further research was carried out in this thesis activity regarding the correction of the algebraic signs of certain current and magnetic field values in the FNAL EPICURE read out values inputted into E781' data bank.Firstly, a code was developed to merge the four files of current and magnetic fields for the four magnets of E78 1, all into one file. Then, an algorithm for a sign correction program was developed in order to both sort the merged data and correct the current and magnetic field signautomatically.In order to obtain a better understanding of the effect of the incorrect sign for a magnet's current and magnetic field on analysis results, a statistical result was summarized. Finally, some conclusions were obtained. / Department of Physics and Astronomy

The prospects of studying multi-strange and charmed antihyperon-hyperon physics and CP violation in hyperon decays in the upcoming PANDA experiment at FAIR, Germany, have been studied in this thesis. The angular dependence on polarisation parameters in the decay of the spin 3/2 Omega hyperon was calculated using the density matrix formalism. Expressions for the angular distributions in the Ω -> ΛK and the subsequent Λ -> pπ decays were derived. Simulations were performed for the pbar p -> Ξ+ Ξ-, pbar p -> Ω+Ω- and pbar p -> Λc-Λc+ reactions. Special attention was given to the reconstruction of spin variables. It is shown that PANDA will register tens of events per second for the pbar p -> Ξ+Ξ- reaction. This should be compared to the previously existing data of a handfull of events. For the other two reactions the event rates will be lower, but still reasonably high. This will be the first measurements of these reactions. It is shown that spin variables can be reconstructed in all three reactions for all production angles of the hyperons. Simulations concerning the possibility to measure CP violation parameters in hyperon decays were also made for the reactions pbar p- > Λbar Λ and pbar p -> Ξ+Ξ-. It was found that false signals from detector asymmetries disappears if no particle identification criterium is used and the analysis is restricted to events were the hyperon decays occur close to the beam axis. The effect of the magnetic field in the PANDA detector on the measurement of hyperon spin variables was investigated for the case of pbar p -> Λbar Λ. The effect was observed to be small for polarisation and negligible for spin correlations.

Zugl.: Freiburg (Breisgau), Univ., Diss., 2006

Heidelberg, Univ., 2009.

No description available.

The Standard Model of particle physics is believed to be only the low energy limit of a more fundamental theory. In order to determine its range of validity, a major part of theoretical and experimental efforts in physics is dedicated to precision tests of the Standard Model. Lattice QCD is a non-perturbative, first-principles approach to Quantum Field Theory. It plays an important role in flavor physics by providing calculations of non-perturbative strong interaction contributions to weak processes involving quarks. Measurements of hadronic quantities can be used to constrain the Standard Model as well as theories Beyond the Standard Model. The first part of this thesis contains theoretical developments regarding non-perturbative renormalization. A new renormalization scheme, RI/mSMOM, for fermion bilinear operators in QCD at non-vanishing quark mass is presented. In order to investigate the properties of the mSMOM scheme, an explicit one-loop computation in perturbation theory using dimensional regularization is performed. Numerically, vertex functions are generated on the lattice, with an appropriate projector, based on the RI/SMOM scheme and the renormalization factors are extracted. Quantities measured include renormalization of the axial current ZA, required to renormalize the axial current entering the computation of the decay constant and the renormalization of the bag parameter. The second part of this report focuses on flavor physics phenomenology on the lattice. It presents results of the first run of the RBC/UKQCD charm project with (2+1)-flavor Domain Wall fermions. Observables and matrix elements are measured on lattices with Iwasaki gauge action. There are two ensembles at the physical point with inverse lattice spacings 1.73 and 2.36 GeV and a third finer ensemble at 2.76 GeV as well as four other auxiliary ensembles with smaller volumes and heavier pion masses which are used to perform the continuum extrapolations. The quantities measured in the region of the charm quark mass are meson masses, decay constants, the matrix element of the OV V +AA operator, the neutral D-meson mixing parameter B and the SU(3) breaking ratio ξ.

The purpose of the thesis is to conduct a case study for investigating change and release management at Catella Bank, within the context of IT Service Management (ITSM), by measuring and to provide suggestions for improvements. Incident and operations management is included to enhance the understanding of the historical performance at Catella. The case study is set out to answer the following research questions: 1. “How does a transition in change management structure impact the performance of successfully delivering both changes and releases of IT services at a financial institution?” 2. “What are the causes of delays in the delivering changes and releases?” 3. “How does stakeholder involvement alter the performance of implementing a successful change and release?” 4. “How do Information Technology, and the corresponding departments manage and control necessary changes and releases of software at present?” Research methodology utilized in the thesis includes both qualitative and quantitative research, including interviews, participation in meetings and empirical investigation of internal material at Catella. The result from the research has provided a significant collection of issues, as well as suggested solutions for Catella to take to improve organizational maturity in enhancing the capabilities in performing work related to the four managerial disciplines within ITSM. The research culminated in the creation of the CHARM (CHange And Release Management) model, which consists of integrating change and release management into project management, split between three different components for the three organizational levels. The author has created the following components: Strategy matrix, a governance model, and a process model.