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Search Results: 1 - 10 of 130461 matches for " V. Brigljevic "
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Study of Charmonium Production and Electroweak Penguins with BABAR
Vuko Brigljevic
Physics , 2001,
Abstract: We report measurements of charmonium resonances (J/Psi, Psi(2S),Chi_c1) using about 25 fb^-1 of data collected by the BABAR detector around the Upsilon(4S) resonance. We present measurements of inclusive charmonium production of charmonium in B decays and from the continuum, as well as exclusive branching ratios of B mesons into charmonium final states. We present also a measurement of the B0 -> K*0 gamma branching ratio and a search for the decay B0 -> gamma gamma.
Measurement of the Spectroscopy of Orbitally Excited B Mesons with the L3 detector
Vuko Brigljevic
Physics , 1999,
Abstract: We measure the mass, decay width and production rate of orbitally excited B mesons in 1.25 million hadronic Z decays registered by the L3 detector in 1994 and 1995. B meson candidates are inclusively reconstructed and combined with charged pions produced at the event primary vertex. An excess of events above the expected background is observed in the B\pi mass spectrum near 5.7 GeV. These events are interpreted as resulting from the decay B^** -> B^(*)pi, where B^** denotes a mixture of L=1 B meson spin states. The masses and decay widths of the B^*_2 (j_q = 3/2) and B^*_1 (j_q = 1/2) resonances and the relative production rate for the combination of all spin states are extracted from a fit to the mass spectrum.
Using XDAQ in Application Scenarios of the CMS Experiment
L. Berti,V. Brigljevic,G. Bruno,E. Cano,A. Csilling,S. Cittolin,F. Drouhin,S. Erhan,D. Gigi,F. Glege,M. Gulmini,J. Gutleber,C. Jacobs,M. Kozlowski,H. Larsen,I. Magrans,G. Maron,F. Meijers,E. Meschi,L. Mirabito,S. Murray,V. O? Dell,A. Oh,L. Orsini,L. Pollet,A. Racz,D. Samyn,P. Scharff-Hansen,P. Sphicas,C. Schwick,I. Suzuki,N. Toniolo,S. Ventura,L. Zangrando
Physics , 2003,
Abstract: XDAQ is a generic data acquisition software environment that emerged from a rich set of of use-cases encountered in the CMS experiment. They cover not the deployment for multiple sub-detectors and the operation of different processing and networking equipment as well as a distributed collaboration of users with different needs. The use of the software in various application scenarios demonstrated the viability of the approach. We discuss two applications, the tracker local DAQ system for front-end commissioning and the muon chamber validation system. The description is completed by a brief overview of XDAQ.
The CMS Event Builder
V. Brigljevic,G. Bruno,E. Cano,S. Cittolin,A. Csilling,D. Gigi,F. Glege,R. Gomez-Reino,M. Gulmini,J. Gutleber,C. Jacobs,M. Kozlovszky,H. Larsen,I. Magrans de Abril,F. Meijers,E. Meschi,S. Murray,A. Oh,L. Orsini,L. Pollet,A. Racz,D. Samyn,P. Scharff-Hansen,C. Schwick,P. Sphicas,V. ODell,I. Suzuki,L. Berti,G. Maron,N. Toniolo,L. Zangrando,A. Ninane,S. Erhan,S. Bhattacharya,J. Branson
Physics , 2003,
Abstract: The data acquisition system of the CMS experiment at the Large Hadron Collider will employ an event builder which will combine data from about 500 data sources into full events at an aggregate throughput of 100 GByte/s. Several architectures and switch technologies have been evaluated for the DAQ Technical Design Report by measurements with test benches and by simulation. This paper describes studies of an EVB test-bench based on 64 PCs acting as data sources and data consumers and employing both Gigabit Ethernet and Myrinet technologies as the interconnect. In the case of Ethernet, protocols based on Layer-2 frames and on TCP/IP are evaluated. Results from ongoing studies, including measurements on throughput and scaling are presented. The architecture of the baseline CMS event builder will be outlined. The event builder is organised into two stages with intelligent buffers in between. The first stage contains 64 switches performing a first level of data concentration by building super-fragments from fragments of 8 data sources. The second stage combines the 64 super-fragments into full events. This architecture allows installation of the second stage of the event builder in steps, with the overall throughput scaling linearly with the number of switches in the second stage. Possible implementations of the components of the event builder are discussed and the expected performance of the full event builder is outlined.
Run Control and Monitor System for the CMS Experiment
M. Bellato,L. Berti,V. Brigljevic,G. Bruno,E. Cano,S. Cittolin,A. Csilling,S. Erhan,D. Gigi,F. Glege,R. Gomez-Reino,M. Gulmini,J. Gutleber,C. Jacobs,M. Kozlovszky,H. Larsen,I. Magrans,G. Maron,F. Meijers,E. Meschi,S. Murray,A. Oh,L. Orsini,L. Pollet,A. Racz,G. Rorato,D. Samyn,P. Scharff-Hansen,C. Schwick,P. Sphicas,N. Toniolo,S. Ventura,L. Zangrando
Computer Science , 2003,
Abstract: The Run Control and Monitor System (RCMS) of the CMS experiment is the set of hardware and software components responsible for controlling and monitoring the experiment during data-taking. It provides users with a "virtual counting room", enabling them to operate the experiment and to monitor detector status and data quality from any point in the world. This paper describes the architecture of the RCMS with particular emphasis on its scalability through a distributed collection of nodes arranged in a tree-based hierarchy. The current implementation of the architecture in a prototype RCMS used in test beam setups, detector validations and DAQ demonstrators is documented. A discussion of the key technologies used, including Web Services, and the results of tests performed with a 128-node system are presented.
Nonsmooth Optimization Algorithms in Some Problems of Fracture Dynamics  [PDF]
V. V. Zozulya
Intelligent Information Management (IIM) , 2010, DOI: 10.4236/iim.2010.211073
Abstract: Mathematical statement of elastodynamic contact problem for cracked body with considering unilateral restrictions and friction of the crack faces is done in classical and weak forms. Different variational formulations of unilateral contact problems with friction based on boundary variational principle are considered. Nonsmooth optimization algorithms of Udzawa’s type for solution of unilateral contact problem with friction have been developed. Convergence of the proposed algorithms has been studied numerically.
Precessing Ball Solitons as Self-Organizing Systems during a Phase Transition in a Ferromagnet  [PDF]
V. V. Nietz
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.410A3010

Precessing ball solitons (PBS) in a ferromagnet during the first order phase transition is induced by a magnetic field directed along the axis of anisotropy, while the action of the periodic field perpendicular to the main magnetic field has been analyzed. Under these conditions, the characteristics of arising equilibrium PBS are uniquely determined by the frequency of the periodic field, but the solitons with other frequencies are impossible. For such structure, the entropy increase connected with dissipation is compensated by the decrease of the entropy due to the external periodic field. It is shown that the equilibrium PBS are essentially the “self-organizing systems” that can arise spotaneously in a metastable state of ferromagnet.

Movement of Self-Organizing Solitons in Ferromagnet  [PDF]
V. V. Nietz
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.610155
Abstract: Precessing ball solitons (PBS) in a ferromagnet during the first order phase transition induced by a magnetic field directed along the axis of anisotropy, while the additional action of high-frequency field perpendicular to the main magnetic field, are analyzed. It is shown that the spatial motion of solitons, associated with thermal fluctuations in the crystal, does not destroy the equilibrium of self-organized PBS.
Lα Line of Dark Positronium as a Nongravitational Detection of DM  [PDF]
V. Burdyuzha, V. Charugin
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.613187
Abstract: An attempt to predict the new atomic dark matter lines is done on the example of a dark lepton atom-positronium. Its Layman-alpha line with the energy near 3 GeV may be observable if the appropriate conditions are realized. For this we have studied a γ-ray excess in the center of our galaxy. In principle, this excess may be produced by the Lα line of a dark positronium in the medium with Compton scattering. The possibility of observations of an annihilation line (E~300 TeV) of dark positronium is also predicted. Other proposals to observe the atomic dark matter are shortly described. Besides, Hα line (1.3μ) of usual positronum must be observable in the direction on the center of our galaxy.
Randomization of Energy and Momentum in Statistical Mechanics  [PDF]
V. V. Paranjape
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.615223
Abstract: Particle-particle collisions in materials give rise to a particle distribution in energy and momentum in such a way that a most probable distribution is realized. I will show that an evaporating liquid generates a molecular imbalance in the equilibrium energy distribution. The molecular collisions by their inherent nature are able to repair the imbalance and in so doing it is shown that the liquids cool down. Similarly an external electric field creates substantial imbalance in the momentum distribution for the electrons in ionic semiconductors. Electron-electron collisions are able to restore the imbalance and as a consequence, similar to the evaporating liquid, the electron gas loses thermal energy and cools down.
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