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1. A Grid service broker for scheduling e-Science applications on global data Grids

Author

L.J. Winton, Srikumar Venugopal, and Rajkumar Buyya

Subjects
Database, Data grid, Computer Networks and Communications, Computer science, Distributed computing, Testbed, computer.software_genre, Grid, Computer Science Applications, Theoretical Computer Science, Scheduling (computing), Computational Theory and Mathematics, Grid computing, e-Science, computer, Software
Abstract

The next generation of scientific experiments and studies, popularly called e-Science, is carried out by large collaborations of researchers distributed around the world engaged in analysis of huge collections of data generated by scientific instruments. Grid computing has emerged as an enabler for e-Science as it permits the creation of virtual organizations that bring together communities with common objectives. Within a community, data collections are stored or replicated on distributed resources to enhance storage capability or efficiency of access. In such an environment, scientists need to have the ability to carry out their studies by transparently accessing distributed data and computational resources. In this paper, we propose and develop a Grid broker that mediates access to distributed resources by (a) discovering suitable data sources for a given analysis scenario, (b) suitable computational resources, (c) optimally mapping analysis jobs to resources, (d) deploying and monitoring job execution on selected resources, (e) accessing data from local or remote data source during job execution and (f) collating and presenting results. The broker supports a declarative and dynamic parametric programming model for creating grid applications. We have used this model in grid-enabling a high energy physics analysis application (Belle Analysis Software Framework). The broker has been used in deploying Belle experiment data analysis jobs on a grid testbed, called Belle Analysis Data Grid, having resources distributed across Australia interconnected through GrangeNet.

Published
2006

2. [Untitled]

Author

L.J. Winton

Subjects
Particle physics, Computer science, Astronomy and Astrophysics, Supercomputer, Grid, computer.software_genre, Semantic grid, Resource (project management), Work (electrical), Grid computing, Utility computing, Space and Planetary Science, e-Science, computer
Abstract

The University of Melbourne, Experimental Particle Physics group recognises that the future of computing is an important issue for the scientific community. It is in the nature of research for the questions posed to become more complex, requiring larger computing resources for each generation of experiment. As institutes and universities around the world increasingly pool their resources and work together to solve these questions, the need arises for more sophisticated com- puting techniques. One such technique, grid computing, is under investigation by many institutes across many disciplines and is the focus of much development in the computing community. 'The Grid', as it is commonly named, is heralded as the future of computing for research, education, and industry alike. This paper will introduce the basic concepts of grid technologies including the Globus toolkit and data grids as of July 2002. It will highlight the challenges faced in developing appropriate resource brokers and schedulers, and will look at the future of grids within high energy physics.

Published
2003

3. New results on a search for a 33.9 MeV/c2 neutral particle from π+ decay in the NOMAD experiment

Author

T. Weisse, J.-P. Mendiburu, K. Benslama, H. Zaccone, Alessandro Cardini, H. Pessard, Marco Fraternali, P. Rathouit, C. Joseph, Fr Pastore, B. A. Popov, P. Hurst, V. Flaminio, M. T. Tran, C. Lachaud, F. J. P. Soler, L. Di Lella, Giacomo Graziani, G. Bassompierre, S. Boyd, M. Valdata-Nappi, Marco Laveder, J.M. Gaillard, Roberto Ferrari, B. Lakić, G. N. Taylor, D. Steele, E. Gangler, J. Dumarchez, M. C. Gonzalez-Garcia, K. Schahmaneche, F. Juget, J. A. Hernando, Malcolm Ellis, M. Kirsanov, Th. Stolarczyk, A.-M. Touchard, O. Klimov, R. Cousins, Bruce Yabsley, J.J. Gómez-Cadenas, X. Méchain, J. Rico, A. Marchionni, J.-M. Vieira, Valerio Vercesi, A. Cervera-Villanueva, M. E. Sevior, Dmitry V. Naumov, Kevin Varvell, C. Nguyen-Mau, A. Placci, L. Camilleri, R. Petti, Stefano Lacaprara, A. Kovzelev, Fergus Wilson, T. Del Prete, Caroline Poulsen, E. do Couto e Silva, F. Salvatore, Vyacheslav Valuev, A. De Santo, E. Pennacchio, N. Hyett, S.A. Bunyatov, J. Bouchez, F. Vannucci, M. Gouanère, H. Degaudenzi, G. J. Feldman, J-P. Meyer, S. N. Tovey, I. Bird, A. Lupi, G. F. Moorhead, A. Grant, D. Hubbard, P. Zuccon, J.-M. Levy, G. Collazuol, Mario Stipčević, Didier Ferrere, G. Conforto, Barry Blumenfeld, L.J. Winton, A. Baldisseri, Claus Gößling, J. Kokkonen, G. Vidal-Sitjes, Sergei Gninenko, A. Krasnoperov, P. Nédélec, M. Mezzetto, T. Vinogradova, Nathalie Besson, D. Sillou, J. Ulrichs, Kai Zuber, E. Tsesmelis, Caren Hagner, T. Fazio, André Rubbia, A. Godley, G. Sozzi, A. Guglielmi, S.R. Mishra, Chiara Roda, L. Linssen, D. Pollmann, E. Iacopini, P. Astier, D. Autiero, F.V. Weber, A. Letessier-Selvon, D. Daniels, Giacomo Polesello, M. Tareb-Reyes, Vincenzo Cavasinni, J. Long, Domizia Orestano, F. Martelli, M. Contalbrigo, T. Dignan, U. Stiegler, A. Lanza, J. Gosset, D. Gibin, A. Polyarush, Achim Geiser, L. S. Peak, M. Veltri, Antonio Bueno, A. N. Toropin, L. La Rotonda, M. Baldo-Ceolin, M. Banner, D. Geppert, P.W. Cattaneo, Ante Ljubičić, F. Bobisut, N.V. Krasnikov, C. Conta, B. Schmidt, Yu. Nefedov, L. Vacavant, and V. Tereshchenko

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Neutrino decay, Neutrino mixing, Branching fraction, Nuclear physics, Pion, Pi, Direct search, Anomaly (physics), Neutral particle, Event (particle physics), KARMEN
Abstract

We report on a direct search in NOMAD for a new 33.9 MeV/c^2 neutral particle (X) produced in pion decay in flight, pi-->mu_X followed by the decay X -->nu e^+e^-. Both decays are postulated to occur to explain the time anomaly observed by the KARMEN experiment. From the analysis of the data collected during the 1996?1998 runs with 4.1×10^19 protons on target, a single candidate event consistent with background expectations was found. The search is sensitive to a pion branching ratio BR(pi-->muX >3.7×10^-15, significantly smaller than previous experimental limits.

Published
2002

4. Final NOMAD results on νμ→ντ and νe→ντ oscillations including a new search for ντ appearance using hadronic τ decays

Author

P Astier, D Autiero, A Baldisseri, M Baldo-Ceolin, M Banner, G Bassompierre, K Benslama, N Besson, I Bird, B Blumenfeld, F Bobisut, J Bouchez, S Boyd, A Bueno, S Bunyatov, L Camilleri, A Cardini, P.W Cattaneo, V Cavasinni, A Cervera-Villanueva, A Chukanov, G Collazuol, G Conforto, C Conta, M Contalbrigo, R Cousins, D Daniels, H Degaudenzi, T Del Prete, A De Santo, T Dignan, L Di Lella, E do Couto e Silva, J Dumarchez, M Ellis, G.J Feldman, R Ferrari, D Ferrère, V Flaminio, M Fraternali, J.-M Gaillard, E Gangler, A Geiser, D Geppert, D Gibin, S Gninenko, A Godley, J.-J Gomez-Cadenas, J Gosset, C Gößling, M Gouanère, A Grant, G Graziani, A Guglielmi, C Hagner, J Hernando, D Hubbard, P Hurst, N Hyett, E Iacopini, C Joseph, F Juget, M Kirsanov, O Klimov, J Kokkonen, A Kovzelev, A Krasnoperov, D Kustov, V.E Kuznetsov, S Lacaprara, C Lachaud, B Lakić, A Lanza, L La Rotonda, M Laveder, A Letessier-Selvon, J.-M Levy, L Linssen, A Ljubič, J Long, A Lupi, A Marchionni, F Martelli, X Méchain, J.-P Mendiburu, J.-P Meyer, M Mezzetto, S.R Mishra, G.F Moorhead, D Naumov, P Nédélec, Yu Nefedov, C Nguyen-Mau, D Orestano, F Pastore, L.S Peak, E Pennacchio, H Pessard, R Petti, A Placci, G Polesello, D Pollmann, A Polyarush, B Popov, C Poulsen, J Rico, P Riemann, C Roda, A Rubbia, F Salvatore, K Schahmaneche, B Schmidt, T Schmidt, A Sconza, M Sevior, D Sillou, F.J.P Soler, G Sozzi, D Steele, U Stiegler, M Stipč, Th Stolarczyk, M Tareb-Reyes, G.N Taylor, V Tereshchenko, A Toropin, A.-M Touchard, S.N Tovey, M.-T Tran, E Tsesmelis, J Ulrichs, L Vacavant, M Valdata-Nappi, V Valuev, F Vannucci, K.E Varvell, M Veltri, V Vercesi, G Vidal-Sitjes, J.-M Vieira, T Vinogradova, F.V Weber, T Weisse, F.F Wilson, L.J Winton, B.D Yabsley, H Zaccone, K Zuber, and P Zuccon

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Oscillation, 0103 physical sciences, Hadron, High Energy Physics::Experiment, Neutrino beam, 010306 general physics, 01 natural sciences, Lepton
Abstract

Results from the nu_tau appearance search in a neutrino beam using the full NOMAD data sample are reported. A new analysis unifies all the hadronic tau decays, significantly improving the overall sensitivity of the experiment to oscillations. The "blind analysis" of all topologies yields no evidence for an oscillation signal. In the two-family oscillation scenario, this sets a 90% C.L. allowed region in the sin^2(2theta)-Delta m^2 plane which includes sin^2(2theta) nu_tau oscillation hypothesis results in sin^2(2theta)

Published
2001

5. A study of backward going p and π− in interactions with the NOMAD detector

Author

P. Astier, D. Autiero, A. Baldisseri, M. Baldo-Ceolin, M. Banner, G. Bassompierre, N. Besson, I. Bird, B. Blumenfeld, F. Bobisut, J. Bouchez, S. Boyd, A. Bueno, S. Bunyatov, L. Camilleri, A. Cardini, P.W. Cattaneo, V. Cavasinni, A. Cervera-Villanueva, A. Chukanov, G. Collazuol, G. Conforto, C. Conta, M. Contalbrigo, R. Cousins, D. Daniels, H. Degaudenzi, T. Del Prete, A. De Santo, T. Dignan, L. Di Lella, E. do Couto e Silva, J. Dumarchez, M. Ellis, T. Fazio, G.J. Feldman, R. Ferrari, D. Ferrère, V. Flaminio, M. Fraternali, J.-M. Gaillard, E. Gangler, A. Geiser, D. Geppert, D. Gibin, S. Gninenko, A. Godley, J.-J. Gomez-Cadenas, J. Gosset, C. Gößling, M. Gouanère, A. Grant, G. Graziani, A. Guglielmi, C. Hagner, J. Hernando, D. Hubbard, P. Hurst, N. Hyett, E. Iacopini, C. Joseph, F. Juget, M. Kirsanov, O. Klimov, J. Kokkonen, A. Kovzelev, A. Krasnoperov, D. Kustov, V. Kuznetsov, S. Lacaprara, C. Lachaud, B. Lakić, A. Lanza, L. La Rotonda, M. Laveder, A. Letessier-Selvon, J.-M. Levy, L. Linssen, A. Ljubičić, J. Long, A. Lupi, A. Marchionni, F. Martelli, X. Méchain, J.-P. Mendiburu, J.-P. Meyer, M. Mezzetto, S.R. Mishra, G.F. Moorhead, D. Naumov, P. Nédélec, Yu. Nefedov, C. Nguyen-Mau, D. Orestano, F. Pastore, L.S. Peak, E. Pennacchio, H. Pessard, R. Petti, A. Placci, G. Polesello, D. Pollmann, A. Polyarush, B. Popov, C. Poulsen, J. Rico, P. Riemann, C. Roda, A. Rubbia, F. Salvatore, K. Schahmaneche, B. Schmidt, T. Schmidt, M. Sevior, D. Sillou, F.J.P. Soler, G. Sozzi, D. Steele, U. Stiegler, M. Stipčević, Th. Stolarczyk, M. Tareb-Reyes, G.N. Taylor, V. Tereshchenko, A. Toropin, A.-M. Touchard, S.N. Tovey, M.-T. Tran, E. Tsesmelis, J. Ulrichs, L. Vacavant, M. Valdata-Nappi, V. Valuev, F. Vannucci, K.E. Varvell, M. Veltri, V. Vercesi, G. Vidal-Sitjes, J.-M. Vieira, T. Vinogradova, F.V. Weber, T. Weisse, F.F. Wilson, L.J. Winton, B.D. Yabsley, H. Zaccone, K. Zuber, and P. Zuccon

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Proton, 010308 nuclear & particles physics, Detector, Order (ring theory), 01 natural sciences, Momentum, 0103 physical sciences, Pi, Particle, Production (computer science), 010306 general physics
Abstract

Backward proton and $\pi^-$ production has been studied in $\nu_{\mu}CC$ interactions with carbon nuclei. Detailed analyses of the momentum distributions, of the production rates, and of the general features of events with a backward going particle, have been carried out in order to understand the mechanism producing these particles. The backward proton data have been compared with the predictions of the reinteraction and the short range correlation models.

Published
2001

6. Measurement of the polarization in νμ charged current interactions in the NOMAD experiment

Author

J. Long, J. Gosset, J.-P. Mendiburu, J. A. Hernando, Alessandro Cardini, D. Gibin, A. Letessier-Selvon, P. Hurst, L. S. Peak, T. Vinogradova, A. Placci, J.M. Gaillard, Barry Blumenfeld, L. Di Lella, D. Steele, D. Daniels, Giacomo Polesello, M. Tareb-Reyes, Th. Stolarczyk, D. Kustov, A. Polyarush, Kevin Varvell, M. E. Sevior, A. Cervera-Villanueva, A. De Santo, T. Dignan, C. Conta, M. Gouanere, G. Vidal-Sitjes, M. Kirsanov, Achim Geiser, Didier Ferrere, B. Schmidt, Antonio Bueno, R. Petti, A. Marchionni, R. Cousins, Fergus Wilson, O.L. Klimov, J.-M. Vieira, A. N. Toropin, A.-M. Touchard, T. Weisse, André Rubbia, G. Conforto, A. Grant, P. Nedelec, L. Camilleri, G. Bassompierre, M. Mezzetto, Caroline Poulsen, Artem Chukanov, E. Iacopini, S. Boyd, F. Martelli, B. Lakić, M. Veltri, G. Collazuol, Mario Stipčević, J. Kokkonen, G. N. Taylor, Sergei Gninenko, Kai Zuber, Malcolm Ellis, A. Kovzelev, Valentin Kuznetsov, Vincenzo Cavasinni, E. do Couto e Silva, J-P. Meyer, B. A. Popov, V. Flaminio, L.J. Winton, S.A. Bunyatov, Nathalie Besson, F. J. P. Soler, Roberto Ferrari, J. Ulrichs, Yu. Nefedov, L. Vacavant, J.J. Gómez-Cadenas, L. La Rotonda, G. Sozzi, I. Bird, A. Baldisseri, J. Bouchez, U. Stiegler, D. Geppert, P.W. Cattaneo, Ante Ljubičić, Bruce Yabsley, X. Méchain, A. Guglielmi, A. Lupi, P. Riemann, Claus Gößling, Alexey Krasnoperov, F. Salvatore, E. Tsesmelis, Caren Hagner, M. Baldo-Ceolin, M. Banner, A. Lanza, Marco Fraternali, T. Schmidt, A. Godley, M. T. Tran, E. Gangler, Valerio Vercesi, S.R. Mishra, M. Valdata-Nappi, Frédéric Juget, Chiara Roda, Vyacheslav Valuev, Dmitry V. Naumov, P. Astier, J. Rico, F. Vannucci, D. Autiero, E. Pennacchio, N. Hyett, D. Pollmann, D. Hubbard, P. Zuccon, H. Zaccone, T. Fazio, C. Joseph, H. Pessard, Domizia Orestano, Marco Laveder, L. Linssen, J. Dumarchez, M. Contalbrigo, F.V. Weber, J. M. Levy, H. Degaudenzi, G. J. Feldman, G. F. Moorhead, C. Lachaud, Giacomo Graziani, K. Schahmaneche, S. Lacaprara, V. Tereshchenko, F. Bobisut, C. Nguyen-Mau, T. Del Prete, D. Sillou, S.N. Tovey, and Fr Pastore

Subjects
Physics, Nuclear and High Energy Physics, Angular momentum, 010308 nuclear & particles physics, Elementary particle, Polarization (waves), 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Bubble chamber, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, Charged current, Lepton, Boson
Abstract

The Λ polarization in νμ charged current interactions has been measured in the NOMAD experiment. The event sample (8087 reconstructed Λ 's) is more than an order of magnitude larger than that of previous bubble chamber experiments, while the quality of event reconstruction is comparable. We observe negative polarization along the W -boson direction which is enhanced in the target fragmentation region: Px(xF 0)=−0.09±0.06(stat)±0.03(sys) . These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. A significant transverse polarization (in the direction orthogonal to the Λ production plane) has been observed for the first time in a neutrino experiment: Py=−0.22±0.03(stat)±0.01(sys) . The dependence of the absolute value of Py on the Λ transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron–hadron experiments.

Published
2001

7. Measurement of the polarization in charged current interactions in the NOMAD experiment

Author

T. Weisse, D. Sillou, F. Salvatore, Vyacheslav Valuev, A. Godley, A. Guglielmi, H. Zaccone, G. J. Feldman, G. F. Moorhead, C. Gssling, B. Schmidt, T. Fazio, O.L. Klimov, Laurent Vacavant, S. Tereshchenko, J. M. Levy, C. Joseph, Michel Gouanère, A. Placci, S.R. Mishra, F. F. Wilson, F. Bobisut, D. Autiero, Frédéric Juget, U. Stiegler, C. Nguyen-Mau, J. Long, E. Tsesmelis, Caren Hagner, R. Petti, D. Geppert, P.W. Cattaneo, Ante Ljubičić, Caroline Poulsen, A. De Santo, A. Polyarush, J.M. Gaillard, P. Rathouit, Achim Geiser, S.A. Bunyatov, J. Kokkonen, Marco Laveder, D. Hubbard, P. Zuccon, J.-P. Mendiburu, Artem Chukanov, J. A. Hernando, I. Bird, A. Lanza, K. Benslama, T. Vinogradova, R. Cousins, Alessandro Cardini, Marco Fraternali, L. La Rotonda, T. Schmidt, A. Lupi, J.-M. Vieira, D. Kustov, Didier Ferrere, L. Linssen, F. Vannucci, M. T. Tran, T. Dignan, T. Del Prete, L. S. Peak, A. M. Touchard, M. Contalbrigo, Roberto Ferrari, Valerio Vercesi, F.V. Weber, Nathalie Besson, C. Conta, M. Kirsanov, E. Gangler, G. Collazuol, Mario Stipčević, Malcolm Ellis, M. Valdata-Nappi, Sergei Gninenko, Antonio Bueno, A. N. Toropin, V. Flaminio, Domizia Orestano, P. Hurst, Kevin Varvell, Dmitry V. Naumov, G. Polesello, M. Banner, F. J. P. Soler, A. Baldisseri, P. Riemann, A. Letessier-Selvon, Alastair Grant, Bruce Yabsley, X. Méchain, André Rubbia, H. Degaudenzi, L. Di Lella, S. B. Boyd, J. Gosset, H. Pessard, P. Nedelec, Chiara Roda, D. Daniels, J.J. Gómez-Cadenas, D. Steele, G. Conforto, Barry Blumenfeld, J. Rico, C. Lachaud, A. Cervera-Villanueva, N. Hyett, D. Pollmann, G. Bassompierre, E. Iacopini, M. Tareb-Reyes, A. Marchionni, Valentin Kuznetsov, B. A. Popov, S. Lacaprara, E. Pennacchio, D. Gibin, K. Schahmaneche, E Silva E. Do Couto, J-P. Meyer, M. E. Sevior, M. Veltri, J. Dumarchez, L. Camilleri, L.J. Winton, F. Martelli, G. Graziani, B. Lakić, Vincenzo Cavasinni, G. N. Taylor, J. Ulrichs, J. Bouchez, Yu. Nefedov, G. Sozzi, A. Kovzelev, T. Stolarczyk, M. Mezzetto, Kai Zuber, P. Astier, Alexey Krasnoperov, M. Baldo-Ceolin, S.N. Tovey, and Fr Pastore

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Polarization (waves), Lambda, 01 natural sciences, Nuclear physics, 0103 physical sciences, Bubble chamber, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, 010306 general physics, Nucleon, Order of magnitude, Charged current
Abstract

The $\Lambda$ polarization in $\nu_\mu$ charged current interactions has been measured in the NOMAD experiment. The event sample (8087 reconstructed $\Lambda$'s) is more than an order of magnitude larger than that of previous bubble chamber experiments, while the quality of event reconstruction is comparable. We observe negative polarization along the $W$-boson direction which is enhanced in the target fragmentation region: $P_x (x_F 0) = -0.21 \pm 0.04 \mbox{(stat)} \pm 0.02 \mbox{(sys)}$. In the current fragmentation region we find $P_x (x_F 0) = -0.09 \pm 0.06 \mbox{(stat)} \pm 0.03 \mbox{(sys)}$. These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. A significant transverse polarization (in the direction orthogonal to the $\Lambda$ production plane) has been observed for the first time in a neutrino experiment: $P_y = -0.22 \pm 0.03 \mbox{(stat)} \pm 0.01 \mbox{(sys)}$. The dependence of the absolute value of $P_y$ on the $\Lambda$ transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the results from unpolarized hadron-hadron experiments.

Published
2000

8. Limit on νe→ντ oscillations from the NOMAD experiment

Author

J. A. Hernando, D. Steele, H. Pessard, Roberto Ferrari, M. Steininger, C. Lachaud, Malcolm Ellis, J.J. Gómez-Cadenas, Bruce Yabsley, A. Cervera-Villanueva, L. Camilleri, X. Méchain, J. Kokkonen, F. Martelli, T. Weisse, A. Krasnoperov, S. Bunyatov, Achim Geiser, A. N. Toropin, Th. Stolarczyk, E. Pennacchio, M. Mezzetto, D. Sillou, P. Rathouit, Giacomo Graziani, N. Hyett, A. Letessier-Selvon, S.N. Tovey, Kai Zuber, Fr Pastore, E. do Couto e Silva, M. E. Sevior, M. Veltri, G. Bassompierre, D. Daniels, M. Gouanère, M. Tareb-Reyes, J. M. Gaillard, T. Vinogradova, A. Godley, Valentin Kuznetsov, J. Dumarchez, S. Boyd, J. Long, D. Geppert, Caroline Poulsen, J-P. Meyer, L. Linssen, P.W. Cattaneo, Ante Ljubičić, B. Lakić, L.J. Winton, U. Stiegler, Marco Fraternali, G. N. Taylor, J. Ulrichs, Chiara Roda, D. Pollmann, H. Degaudenzi, J.-P. Mendiburu, G. J. Feldman, F. Salvatore, G. F. Moorhead, G. Sozzi, Valerio Vercesi, Kevin Varvell, G. Polesello, F. V. Weber, Alessandro Cardini, Domizia Orestano, Claus Gößling, J. Gosset, O. Klimov, A. Grant, M. Baldo-Ceolin, D. Gibin, H. Zaccone, C. Nguyen-Mau, T. Del Prete, P. Hurst, A. Polayrush, K. Benslama, Vyacheslav Valuev, F. Vannucci, C. Joseph, A. Guglielmi, L. Di Lella, F. Juget, A. Lanza, M. Valdata-Nappi, M. T. Tran, T. Dignan, A. Pluquet, L.S. Peak, M. Kirsanov, G. Ballocchi, D. Hubbard, P. Zuccon, K. Schahmaneche, L. La Rotonda, S. R. Mishra, M. Banner, Marco Laveder, E. Gangler, M. Contalbrigo, A. Bueno, Nathalie Besson, P. Riemann, R. Cousins, J.-M. Vieira, I. Bird, J. Rico, A. Marchionni, A. Kovzelev, André Rubbia, Barry Blumenfeld, E. Iacopini, Vincenzo Cavasinni, D. Autiero, V. Flaminio, F. J. P. Soler, Didier Ferrere, Sergei Gninenko, P. Astier, E. Tsesmelis, Caren Hagner, T. Schmidt, J. Bouchez, A. Lupi, A. Baldisseri, S. Lacaprara, Yu. Nefedov, L. Vacavant, A. Placci, F. Bobisut, A. De Santo, C. Conta, B. Schmidt, G. Conforto, A. M. Touchard, P. Nédélec, J. M. Levy, R. Petti, Fergus Wilson, G. Collazuol, Mario Stipčević, and B. A. Popov

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, 0103 physical sciences, Context (language use), Limit (mathematics), Neutrino beam, 010306 general physics, Neutrino oscillation, 01 natural sciences, Charged current
Abstract

In the context of a two-flavour approximation we reinterpret the published NOMAD limit on ν μ → ν τ oscillations in terms of ν e → ν τ oscillations. At 90% C.L. we obtain sin 2 2θ eτ 5.2×10 −2 for large Δm 2 , while for sin 2 2 θ eτ =1 the confidence region includes Δm 2 2 / c 4 .

Published
2000

9. A more sensitive search for νμ→ντ oscillations in NOMAD

Author

F. Vannucci, V. Flaminio, Giacomo Graziani, F. J. P. Soler, O. Klimov, I.J. Donnelly, M. Banner, Caroline Poulsen, C. Nguyen-Mau, T. Del Prete, J. Dumarchez, Domizia Orestano, K. Benslama, André Rubbia, E. Pennacchio, N. Hyett, A. Lanza, E. Tsesmelis, Caren Hagner, T. Weisse, E. Iacopini, T. Vinogradova, M. T. Tran, I. Bird, P. Astier, Th. Stolarczyk, S. Bunyatov, F. Salvatore, B.D Yabsley, M. K. Vo, Vincenzo Cavasinni, Nathalie Besson, G. Renzoni, T. Schmidt, Antonio Bueno, A. N. Toropin, D. Autiero, P. Hurst, S.N. Tovey, G. J. Feldman, L. La Rotonda, Fr Pastore, A. Krasnoperov, E. Gangler, Didier Ferrere, Marco Fraternali, L. Di Lella, P. Rathouit, G. F. Moorhead, J. Kokkonen, J. Long, A Gandolfo, A. Kovzelev, A. Baldisseri, M. E. Sevior, M. Contalbrigo, A. M. Touchard, P. Nédélec, C. Conta, B. Schmidt, M. Kirsanov, D. Geppert, A. Godley, A. Guglielmi, J. A. Hernando, P.W. Cattaneo, Ante Ljubičić, Roberto Renò, E Manola-Poggioli, P. Riemann, J.-P. Mendiburu, L. Linssen, A. Cervera-Villanueva, G. Collazuol, Mario Stipčević, G. Conforto, S.R. Mishra, T. Dignan, Alessandro Cardini, A. Placci, E. do Couto e Silva, R. Petti, H. Pessard, U. Stiegler, J. Bouchez, Valerio Vercesi, Chiara Roda, A. De Santo, M. Veltri, J. M. Levy, F. Bobisut, B Popov, D. Verkindt, A. Lupi, L. Camilleri, Kevin Varvell, Stefano Lacaprara, A. Grant, J. Rico, A. Marchionni, Fergus Wilson, H. Zaccone, D. Pollmann, Malcolm Ellis, Roberto Ferrari, Vyacheslav Valuev, S.A. Volkov, C. Joseph, J.-M. Gaillard, Barry Blumenfeld, G. Ballocchi, J.J. Gómez-Cadenas, R. Cousins, Marco Laveder, D. Hubbard, P. Zuccon, K. Schahmaneche, M. Baldo-Ceolin, X. Méchain, F.V. Weber, J.-M. Vieira, Yu. Nefedov, L. Vacavant, J. Gosset, D. Gibin, T. Fazio, Achim Geiser, L.S. Peak, M Valdata-Nappi, M. Gouanère, G. Bassompierre, M. Mezzetto, D. Sillou, Kai Zuber, S. Boyd, B. Lakić, G. N. Taylor, Claus Gößling, D. Steele, L. Mossuz, F. Juget, M. Steininger, H Degaudenzi, C. Lachaud, G Segneri, V. Tereshchenko, A. Pluquet, F. Martelli, S. N. Gninenko, A. Letessier-Selvon, D. Daniels, Giacomo Polesello, M. Tareb-Reyes, Valentin Kuznetsov, J-P. Meyer, L.J. Winton, J. Ulrichs, and G. Sozzi

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Oscillation, Scattering, High Energy Physics::Experiment, Sensitivity (control systems), Neutrino, Neutrino beam, Neutrino oscillation, Charged current, Confidence region
Abstract

With additional data and improved algorithms, we have enhanced the sensitivity of our appearance search for $\numunutau$ oscillations in the NOMAD detector in the CERN-SPS wide-band neutrino beam. The search uses kinematic criteria to identify $\nutau$ charged current interactions followed by decay of the $\tau^-$ to one of several decay modes. Our ``blind'' analyses of deep-inelastic scattering data taken in 1996 and 1997, combined with consistent reanalyses of previously reported 1995 data, yield no oscillation signal. For the two-family oscillation scenario, we present the contour outlining a 90\% C.L. confidence region in the $\sin^22\theta_{\mu \tau} - \Delta m^2$ plane. At large $\Delta m^2$, the confidence region includes $\sin^22\theta_{\mu\tau}\ \ 1.2\times10^{-3}$ (a limit 3.5 times more stringent than in our previous publication), while at $\sin^22\theta_{\mu \tau}=1$, the confidence region includes $\Delta m^2 1.2$ eV$^2$/$c^4$.

Published
1999

10. Precision measurement of scaled momentum, charge multiplicity, and thrust in νμN and interactions

Author

H. Degaudenzi, G. J. Feldman, G. F. Moorhead, Valentin Kuznetsov, F. Salvatore, F. Vannucci, M. K. Vo, Corrado Angelini, J. Long, L.J. Winton, B. A. Popov, G. Collazuol, Mario Stipčević, J. M. Levy, J. Ulrichs, D. Verkindt, S.A. Bunyatov, P. Rathouit, M. Banner, Fergus Wilson, G. Sozzi, Alexey Krasnoperov, B. Schmidt, E. Manola-Poggioli, T. Dignan, J. Altegoer, Caroline Poulsen, M. Baldo-Ceolin, S. Basa, J. Kokkonen, R. Cousins, Nathalie Besson, G. Renzoni, T. Vinogradova, L. Linssen, Achim Geiser, Giacomo Graziani, J.-M. Vieira, M. E. Sevior, A. Baldisseri, Valerio Vercesi, S. N. Gninenko, André Rubbia, O.L. Klimov, P. Hurst, Marco Fraternali, T. Stolarczyk, M. Serrano, Kevin Varvell, A. Grant, H. Pessard, P. Nedelec, P. Astier, L. Camilleri, A. Kovzelev, S. Tereshchenko, D. Autiero, J. Dumarchez, Vyacheslav Valuev, E. do Couto e Silva, J. Hernando, D. Hubbard, P. Zuccon, Malcolm Ellis, Chiara Roda, J.J. Gómez-Cadenas, E. Iacopini, C. Lazzeroni, D. Sillou, A. Guglielmi, Vincenzo Cavasinni, A. Letessier-Selvon, D. Daniels, Giacomo Polesello, M. Tareb-Reyes, F. Bobisut, S.A. Volkov, L. Di Lella, Roberto Ferrari, M. Kirsanov, Bruce Yabsley, X. Méchain, F.V. Weber, M. Veltri, V. Uros, E. Pennacchio, N. Hyett, D. Pollmann, I. Bird, V. Vacavant, Michel Gouanère, F. Martelli, M. Valdata-Nappi, A. Godley, J-P. Meyer, D. Nordmann, A. Cervera-Villanueva, K. Benslama, L. La Rotonda, H. Zaccone, M. Werlen, S.R. Mishra, A. Lanza, U. Stiegler, S. Lacaprara, C. Joseph, Yu. Nefedov, T. Fazio, G. Ballocchi, A. Pluquet, C. Conta, Frédéric Juget, Marco Laveder, Barry Blumenfeld, M. T. Tran, Domizia Orestano, E. Gangler, J. Gosset, R. Petti, G. Conforto, D. Gibin, K. Schahmaneche, M. Contalbrigo, J.-P. Mendiburu, J. P. Perroud, G. Bassompierre, Alessandro Cardini, S. Boyd, G. N. Taylor, V. Flaminio, P. Galumian, F. J. P. Soler, D. Geppert, P.W. Cattaneo, Ante Ljubičić, A. Placci, L. S. Peak, A. De Santo, Antonio Bueno, Fr Pastore, A. N. Toropin, I.J. Donnelly, C. Nguyen-Mau, T. Del Prete, M. Mezzetto, Kai Zuber, S. N. Tovey, A. M. Touchard, J. Bouchez, D. Steele, L. Mossuz, A. Lupi, J. M. Gaillard, Didier Ferrere, A. Marchionni, M. Steininger, Claus Gößling, E. Tsesmelis, Caren Hagner, and T. Weisse

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Overline, Coherence effect, Electronic document, Thrust, Multiplicity (chemistry), Charged current
Abstract

By focusing on the notion of electronic document, we differentiate two evolutions which are useful to distinct titles: on the one hand are the documents, which have value of reference. Its administrator will take care to preserve its integrity and its context of production which is strongly significant. On the other hand are resources, evolutionary elements by nature, which the user must be able to appropriate and who must thus be placed at the disposal so that the production is erased, to focus on a logic of exploitation and service.

Published
1999

11. A search for ν→ν oscillations using the NOMAD detector

Author

M. Contalbrigo, T. Fazio, V. Flaminio, F. J. P. Soler, K. Benslama, T. Weisse, L.S. Peak, A. Lanza, E. do Couto e Silva, R. Petti, André Rubbia, F. Bobisut, D. Scannicchio, F. Juget, J-P. Meyer, L. La Rotonda, H. Pessard, E. Manola-Poggioli, M. Mezzetto, L.J. Winton, V. Valuev, M. T. Tran, D. Sillou, Kai Zuber, E. Iacopini, R. Cousins, J. Ulrichs, Kevin Varvell, G. Collazuol, Mario Stipčević, L. Linssen, A. Cervera-Villanueva, J.-M. Vieira, A. Grant, V. Tereshchenko, P. Rathouit, D. Pollmann, A. Pluquet, Giacomo Graziani, Didier Ferrere, G. Sozzi, F.V. Weber, D. Verkindt, P. Steffen, G. Conforto, Barry Blumenfeld, Th. Stolarczyk, Vincenzo Cavasinni, J. Gosset, A. Baldisseri, A. Marchionni, J. Altegoer, S.A. Volkov, E. Gangler, D. Kekez, P. Nédélec, Roberto Ferrari, S. N. Gninenko, J.-M. Gaillard, J. Long, M. Gouanère, J. M. Levy, M. E. Sevior, Marco Fraternali, Claus Gößling, A. Placci, M. Veltri, A. Letessier-Selvon, D. Gibin, G. Bassompierre, A. De Santo, D. Autiero, Caroline Poulsen, D. Daniels, E. Tsesmelis, J.-P. Mendiburu, Corrado Angelini, V. Uros, M. Valdata-Nappi, D. Steele, Bruce Yabsley, X. Méchain, Stefano Lacaprara, L. Mossuz, Giacomo Polesello, Fergus Wilson, Alessandro Cardini, M. Tareb-Reyes, B. G. Pope, M. Baldo-Ceolin, S. Boyd, D. Geppert, Achim Geiser, M. Steininger, H. Degaudenzi, T. Dignan, G. J. Feldman, P.W. Cattaneo, Ante Ljubičić, V.E. Kuznetsov, G. N. Taylor, S. Basa, J. Bouchez, G. F. Moorhead, A. Lupi, B. Khomenko, A. M. Touchard, S. Bunyatov, F. Salvatore, L. Camilleri, Yu. Nefedov, J. Kokkonen, M. K. Vo, A. Kovzelev, P. Hurst, T. Vinogradova, B. Popov, L. Vacavant, L. Di Lella, J. Hernando, D. Hubbard, K. Schahmaneche, C. Hagner, F. Martelli, U. Stiegler, C. Conta, S.N. Tovey, M. Kirsanov, I. Bird, P. Astier, Fr Pastore, Domizia Orestano, H. Plothow-Besch, Antonio Bueno, A. N. Toropin, F. Vannucci, J. P. Perroud, A. Sconza, P. Galumian, M. Banner, J.J. Gómez-Cadenas, A. Castera, O. Klimov, I.J. Donnelly, C. Nguyen-Mau, T. Del Prete, E. Pennacchio, N. Hyett, G. Fumagalli, M. Werlen, S.R. Mishra, Chiara Roda, B. Schmidt, Valerio Vercesi, M. Serrano, H. Zaccone, C. Joseph, G. Ballocchi, Marco Laveder, Nathalie Besson, G. Renzoni, C. Lazzeroni, A. Guglielmi, and J. Dumarchez

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Oscillation, Detector, High Energy Physics::Experiment, Detection theory, Wide band, Neutrino oscillation, Signal, Charged current, Beam (structure)
Abstract

NOMAD is a neutrino oscillation experiment designed to search for ντ appearance in the CERN-SPS wide band νμ beam. Signal detection relies on the identification of ντ charged current interactions using kinematic criteria. The analysis of the 1995 data sample yields no oscillation signal. Combining all studied τ decay modes, a limit of sin 2 2θ μτ 4.2×10 −3 is obtained for large Δm2 at the 90% confidence level.

Published
1998

12. A precision measurement of charm dimuon production in neutrino interactions from the NOMAD experiment

Author

K. Schahmaneche, C.T. Kullenberg, P. Hurst, L. Di Lella, J.-P. Mendiburu, M. Valdata-Nappi, Alessandro Cardini, J.J. Kim, R. Challis, S.A. Bunyatov, J. A. Hernando, V. Tereshchenko, Roberto Ferrari, A. Baldisseri, Th. Stolarczyk, G. Collazuol, Mario Stipčević, A. Cervera-Villanueva, C. Lachaud, Giacomo Graziani, K. Benslama, T. Weisse, B. A. Popov, M. E. Sevior, A. Lanza, F. Bobisut, A. Marchionni, M. T. Tran, Bruce Yabsley, X. Méchain, E. Gangler, H. Zaccone, C. Joseph, F. Salvatore, P. Astier, Caroline Poulsen, Domizia Orestano, Mikhail Kirsanov, R. Cousins, M. Mezzetto, M. Contalbrigo, D. Autiero, R. Petti, Stefano Lacaprara, Marco Laveder, Kai Zuber, Fergus Wilson, S.N. Tovey, J.-M. Vieira, J. M. Levy, Sergey A. Kulagin, A.M. Scott, A. Sconza, Yu. Nefedov, L. Vacavant, L. La Rotonda, Frédéric Juget, S. R. Mishra, Chiara Roda, E. Pennacchio, O.L. Klimov, H. Degaudenzi, G. J. Feldman, Fr Pastore, N. Hyett, D. Pollmann, G. F. Moorhead, D. Geppert, Luca Rebuffi, P. Riemann, Artem Chukanov, V. V. Lyubushkin, E. do Couto e Silva, P.W. Cattaneo, Ante Ljubičić, Didier Ferrere, Kevin Varvell, Barry Blumenfeld, Alexey Krasnoperov, J. Kokkonen, M. Baldo-Ceolin, M. Banner, H. Duyang, C. Conta, C. Nguyen-Mau, T. Del Prete, B. Schmidt, Sergei Gninenko, J. Dumarchez, A. Grant, H. Pessard, A. Godley, P. Nedelec, Valerio Vercesi, M. Veltri, Dmitry V. Naumov, G. Conforto, J. Long, Claus Gößling, Vyacheslav Valuev, J. Libo, Malcolm Ellis, F. Vannucci, Alexander Toropin, L. S. Peak, E. Tsesmelis, Caren Hagner, T. Schmidt, P. Zuccon, A. Kovzelev, Antonio Bueno, J. Bouchez, O. Samoylov, J.J. Gómez-Cadenas, A. Lupi, A. Placci, D. Steele, A. De Santo, L. Linssen, Marco Fraternali, Sergey Alekhin, V. Flaminio, F. J. P. Soler, F.V. Weber, T. Vinogradova, André Rubbia, E. Iacopini, Vincenzo Cavasinni, A.-M. Touchard, A. Polyarush, Achim Geiser, J. Gosset, D. Gibin, Q. Wu, U. Stiegler, G. Bassompierre, J. Rico, S. Boyd, B. Lakić, G. N. Taylor, J.M. Gaillard, J-P. Meyer, L. Camilleri, L.J. Winton, J. Ulrichs, D. Sillou, G. Sozzi, A. Guglielmi, I. Bird, X.C. Tian, Nathalie Besson, G. Vidal-Sitjes, Michel Gouanère, F. Martelli, N. Kent, A. Letessier-Selvon, Giacomo Polesello, M. Tareb-Reyes, Orestano, Domizia, National Science Foundation (US), Alfred P. Sloan Foundation, Australian Research Council, Federal Ministry of Education and Research (Germany), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and NOMAD

Subjects
Nuclear and High Energy Physics, Strange quark, Particle physics, Charm production, strange quark content of the nucleon, dimuon charm production, FOS: Physical sciences, Strange quark content of the nucleon, Dimuon charm production, Neutrino interactions, 01 natural sciences, Charm quark, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Charm (quantum number), 010306 general physics, Charged current, Physics, Quantum chromodynamics, 010308 nuclear & particles physics, Física, Deep inelastic scattering, 3. Good health, Neutrino, Nucleon, Particle Physics - Experiment
Abstract

We present our new measurement of the cross-section for charm dimuon production in neutrino iron interactions based upon the full statistics collected by the NOMAD experiment. After background subtraction we observe 15 344 charm dimuon events, providing the largest sample currently available. The analysis exploits the large inclusive charged current sample - about 9 x 10(6) events after all analysis cuts - and the high resolution NOMAD detector to constrain the total systematic uncertainty on the ratio of charm dimuon to inclusive Charged Current (CC) cross-sections to similar to 2%. We also perform a fit to the NOMAD data to extract the charm production parameters and the strange quark sea content of the nucleon within the NLO QCD approximation. We obtain a value of m(c)(m(c)) = 1.159 +/- 0.075 GeV/c(2) for the running mass of the charm quark in the (MS) over bar scheme and a strange quark sea suppression factor of kappa(s) = 0.591 +/- 0.019 at Q(2) = 20 GeV2/c(2)., We extend our grateful appreciations to the CERN SPS staff for the magnificent performance of the neutrino beam. The experiment was supported by the following agencies: ARC and DIISR of Australia, IN2P3 and CEA of France, BMBF of Germany, INFN of Italy, JINR and INR of Russia, FNSRS of Switzerland, DOE, NSF, Sloan, and Cottrell Foundations of USA, and VP Research Office of the University of South Carolina. This work was partially supported by the University of South Carolina, by the DOE grant DE-FG02-95ER40910, by the Russian Federal grant 02.740.11.5220 and MK-432.2013.2, and JINR grant 13-201-01.

Published
2013

13. A measurement of coherent neutral pion production in neutrino neutral current interactions in the NOMAD experiment

Author

Marco Fraternali, A. Placci, J. A. Hernando, M. Mezzetto, A. De Santo, Alexander Toropin, Kai Zuber, G. Bassompierre, S. Boyd, B. Lakić, G. N. Taylor, L. S. Peak, O.L. Klimov, V. Flaminio, F. J. P. Soler, J. Long, K. Benslama, T. Vinogradova, F. Bobisut, Antonio Bueno, A.-M. Touchard, A. Cervera-Villanueva, Kevin Varvell, L. Camilleri, Vyacheslav Valuev, J.M. Gaillard, C. Lachaud, Giacomo Graziani, V. V. Lyubushkin, M. T. Tran, D. Steele, Nathalie Besson, E. Gangler, Mikhail Kirsanov, R. Cousins, Barry Blumenfeld, A.M. Scott, A. Grant, H. Pessard, P. Nedelec, T. Weisse, J. Kokkonen, Malcolm Ellis, R. Challis, J.-P. Mendiburu, Q. Wu, S.A. Bunyatov, A. Marchionni, J.-M. Vieira, U. Stiegler, E. Pennacchio, I. Bird, D. Geppert, J. Rico, P.W. Cattaneo, Ante Ljubičić, F. Vannucci, E. do Couto e Silva, N. Hyett, R. Petti, D. Pollmann, P. Astier, J. Bouchez, L. Linssen, J.J. Gómez-Cadenas, André Rubbia, O. Samoylov, Alessandro Cardini, X.C. Tian, A. Baldisseri, Sergey Alekhin, Roberto Ferrari, V. Tereshchenko, F. Salvatore, B. A. Popov, Alexey Krasnoperov, D. Autiero, D. Sillou, Yu. Nefedov, L. Vacavant, F.V. Weber, Frédéric Juget, Chiara Roda, P. Zuccon, J. Gosset, A. Lupi, E. Iacopini, Caroline Poulsen, H. Zaccone, Luca Rebuffi, Artem Chukanov, Bruce Yabsley, Claus Gößling, X. Méchain, A. Guglielmi, D. Gibin, C. Joseph, Vincenzo Cavasinni, G. Vidal-Sitjes, M. Baldo-Ceolin, A. Polyarush, C. Conta, B. Schmidt, H. Degaudenzi, G. J. Feldman, Achim Geiser, G. F. Moorhead, G. Conforto, J. Dumarchez, Marco Laveder, Didier Ferrere, Th. Stolarczyk, M. Banner, Valerio Vercesi, Dmitry V. Naumov, M. E. Sevior, K. Schahmaneche, Sergei Gninenko, C.T. Kullenberg, P. Hurst, L. Di Lella, M. Valdata-Nappi, E. Tsesmelis, Caren Hagner, Domizia Orestano, J.J. Kim, T. Schmidt, A. Kovzelev, A. Godley, M. Contalbrigo, J. M. Levy, Sergey A. Kulagin, G. Collazuol, Mario Stipčević, M. Veltri, J-P. Meyer, L.J. Winton, A. Sconza, J. Ulrichs, M.B. Seaton, L. La Rotonda, S. R. Mishra, A. Lanza, G. Sozzi, P. Riemann, Stefano Lacaprara, Fergus Wilson, A. Letessier-Selvon, Giacomo Polesello, M. Tareb-Reyes, Michel Gouanère, F. Martelli, N. Kent, C. Nguyen-Mau, T. Del Prete, S.N. Tovey, Fr Pastore, Kullenberg, Ct, Mishra, Sr, Seaton, Mb, Kim, Jj, Tian, Xc, Scott, Am, Kirsanov, M, Petti, R, Alekhin, S, Astier, P, Autiero, D, Baldisseri, A, Baldo Ceolin, M, Banner, M, Bassompierre, G, Benslama, K, Besson, N, Bird, I, Blumenfeld, B, Bobisut, F, Bouchez, J, Boyd, S, Bueno, A, Bunyatov, S, Camilleri, L, Cardini, A, Cattaneo, Pw, Cavasinni, V, Cervera Villanueva, A, Challis, R, Chukanov, A, Collazuol, G, Conforto, G, Conta, C, Contalbrigo, M, Cousins, R, Degaudenzi, H, De Santo, A, Del Prete, T, Di Lella, L, Silva, Ede, Dumarchez, J, Ellis, M, Feldman, Gj, Ferrari, R, Ferrere, D, Flaminio, V, Fraternali, M, Gaillard, Jm, Gangler, E, Geiser, A, Geppert, D, Gibin, D, Gninenko, S, Godley, A, Gomez Cadenas, Jj, Gosset, J, Gossling, C, Gouanere, M, Grant, A, Graziani, G, Guglielmi, A, Hagner, C, Hernando, J, Hurst, P, Hyett, N, Iacopini, E, Joseph, C, Juget, F, Kent, N, Klimov, O, Kokkonen, J, Kovzelev, A, Krasnoperov, A, Kulagin, S, Lacaprara, S, Lachaud, C, Lakic, B, Lanza, A, La Rotonda, L, Laveder, M, Letessier Selvon, A, Levy, Jm, Ling, J, Linssen, L, Ljubicic, A, Long, J, Lupi, A, Lyubushkin, V, Marchionni, A, Martelli, F, Mechain, X, Mendiburu, Jp, Meyer, Jp, Mezzetto, M, Moorhead, Gf, Naumov, D, Nedelec, P, Nefedov, Y, Nguyen Mau, C, Orestano, Domizia, Pastore, F, Peak, L, Pennacchio, E, Pessard, H, Placci, A, Polesello, G, Pollmann, D, Polyarush, A, Poulsen, C, Popov, B, Rebuffi, L, Rico, J, Riemann, P, Roda, C, Rubbia, A, Salvatore, F, Samoylov, O, Schahmaneche, K, Schmidt, B, Schmidt, T, Sconza, A, Sevior, M, Sillou, D, Soler, Fjp, Sozzi, G, Steele, D, Stiegler, U, Stipcevic, M, Stolarczyk, T, Tareb Reyes, M, Taylor, Gn, Tereshchenko, V, Toropin, A, Touchard, Am, Tovey, Sn, Tran, Mt, Tsesmelis, E, Ulrichs, J, Vacavant, L, Valdata Nappi, M, Valuev, V, Vannucci, F, Varvell, Ke, Veltri, M, Vercesi, V, Vidal Sitjes, G, Vieira, Jm, Vinogradova, T, Weber, Fv, Weisse, T, Wilson, Ff, Winton, Lj, Wu, Q, Yabsley, Bd, Zaccone, H, Zuber, K, Zuccon, P., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), APC - Neutrinos, AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), NOMAD, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire d'Annecy de Physique des Particules (LAPP), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Particle physics, Nuclear and High Energy Physics, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, Coherent pion neutrino neutral current, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Nuclear Experiment, Charged current, Physics, Range (particle radiation), Large Hadron Collider, Neutral current, 010308 nuclear & particles physics, Scattering, Física, Deep inelastic scattering, coherent pion, neutrino, neutral current, High Energy Physics::Experiment, Neutrino, Particle Physics - Experiment
Abstract

We present a study of exclusive neutral pion production in neutrino-nucleus Neutral Current interactions using data from the NOMAD experiment at the CERN SPS. The data correspond to $1.44 \times 10^6$ muon-neutrino Charged Current interactions in the energy range $2.5 \leq E_{\nu} \leq 300$ GeV. Neutrino events with only one visible $\pi^0$ in the final state are expected to result from two Neutral Current processes: coherent $\pi^0$ production, {\boldmath $\nu + {\cal A} \to \nu + {\cal A} + \pi^0$} and single $\pi^0$ production in neutrino-nucleon scattering. The signature of coherent $\pi^0$ production is an emergent $\pi^0$ almost collinear with the incident neutrino while $\pi^0$'s produced in neutrino-nucleon deep inelastic scattering have larger transverse momenta. In this analysis all relevant backgrounds to the coherent $\pi^0$ production signal are measured using data themselves. Having determined the backgrounds, and using the Rein-Sehgal model for the coherent $\pi^0$ production to compute the detection efficiency, we obtain {\boldmath $4630 \pm 522 (stat) \pm 426 (syst)$} corrected coherent-$\pi^0$ events with $E_{\pi^0} \geq 0.5$ GeV. We measure {\boldmath $\sigma (\nu {\cal A} \to \nu {\cal A} \pi^0) = [ 72.6 \pm 8.1(stat) \pm 6.9(syst) ] \times 10^{-40} cm^2/nucleus$}. This is the most precise measurement of the coherent $\pi^0$ production to date., Comment: 23 pages, 9 figures, accepted for publication in Phys. Lett. B

Published
2009

14. A Grid Service Broker for Scheduling Distributed Data-Oriented Applications on Global Grids

Author

Rajkumar Buyya, L.J. Winton, and Srikumar Venugopal

Subjects
FOS: Computer and information sciences, Database, Data grid, Computer science, Distributed computing, Grid file, Testbed, computer.software_genre, Grid, Scheduling (computing), DRMAA, C.1.4, Semantic grid, Computer Science - Distributed, Parallel, and Cluster Computing, Grid computing, Distributed, Parallel, and Cluster Computing (cs.DC), computer
Abstract

The next generation of scientific experiments and studies, popularly called as e-Science, is carried out by large collaborations of researchers distributed around the world engaged in analysis of huge collections of data generated by scientific instruments. Grid computing has emerged as an enabler for e-Science as it permits the creation of virtual organizations that bring together communities with common objectives. Within a community, data collections are stored or replicated on distributed resources to enhance storage capability or efficiency of access. In such an environment, scientists need to have the ability to carry out their studies by transparently accessing distributed data and computational resources. In this paper, we propose and develop a Grid broker that mediates access to distributed resources by (a) discovering suitable data sources for a given analysis scenario, (b) suitable computational resources, (c) optimally mapping analysis jobs to resources, (d) deploying and monitoring job execution on selected resources, (e) accessing data from local or remote data source during job execution and (f) collating and presenting results. The broker supports a declarative and dynamic parametric programming model for creating grid applications. We have used this model in grid-enabling a high energy physics analysis application (Belle Analysis Software Framework). The broker has been used in deploying Belle experiment data analysis jobs on a grid testbed, called Belle Analysis Data Grid, having resources distributed across Australia interconnected through GrangeNet., Comment: 15 pages, 11 figures, 1 table

Published
2004
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15. A study of strange particle production in nu(mu) charged current interactions in the NOMAD experiment

Author

E. Pennacchio, N. Hyett, J.-M. Levy, Barry Blumenfeld, P. Astier, Alexander Toropin, L. S. Peak, Malcolm Ellis, Antonio Bueno, J.J. Gómez-Cadenas, A. Polyarush, H. Zaccone, J. Long, Didier Ferrere, M. E. Sevior, C. Joseph, Achim Geiser, Domizia Orestano, S.N. Tovey, Fr Pastore, Mikhail Kirsanov, R. Cousins, G. Bassompierre, Marco Laveder, J.-M. Vieira, T. Del Prete, M. Contalbrigo, L. La Rotonda, Sergei Gninenko, R. Challis, S.A. Bunyatov, T. Dignan, K. Schahmaneche, T. Vinogradova, S. Boyd, B. Lakić, P. Riemann, G. N. Taylor, J. A. Hernando, D. Kustov, Vyacheslav Valuev, Roberto Ferrari, F. Juget, Alexey Krasnoperov, A. Baldisseri, D. Geppert, E. Tsesmelis, Caren Hagner, M. Baldo-Ceolin, F. Vannucci, M. Banner, Bruce Yabsley, X. Méchain, P.W. Cattaneo, Ante Ljubičić, C. Conta, A. Lanza, E Silva E. Do Couto, L. Linssen, T. Schmidt, B. Schmidt, J. Kokkonen, A. Cervera-Villanueva, P. Zuccon, R. Petti, Stefano Lacaprara, D. Steele, A. Kovzelev, L. Camilleri, A.-M. Touchard, D. Pollmann, Fergus Wilson, André Rubbia, T. Weisse, T. Stolarczyk, A. Godley, V. Tereshchenko, E. Iacopini, G. Conforto, J.M. Gaillard, Vincenzo Cavasinni, M. Veltri, F.V. Weber, J. Dumarchez, M. T. Tran, Kevin Varvell, E. Gangler, M. Mezzetto, Kai Zuber, F. Salvatore, G. Collazuol, A. Grant, Mario Stipčević, J. Bouchez, H. Pessard, P. Nedelec, C. Gössling, A. Lupi, J.-P. Mendiburu, Valerio Vercesi, B. A. Popov, H. Degaudenzi, Alessandro Cardini, Dmitry V. Naumov, G. J. Feldman, G. F. Moorhead, C. Lachaud, F. Bobisut, Giacomo Graziani, U. Stiegler, J. Gosset, D. Gibin, V. Flaminio, F. J. P. Soler, O.L. Klimov, T. Fazio, D. Autiero, Yu. Nefedov, L. Vacavant, A. Placci, A. De Santo, S.R. Mishra, Chiara Roda, Caroline Poulsen, P. Hurst, L. Di Lella, M. Valdata-Nappi, D. Sillou, A. Guglielmi, J. Rico, A. Marchionni, Nathalie Besson, Marco Fraternali, I. Bird, G. Vidal-Sitjes, Valentin Kuznetsov, J-P. Meyer, L.J. Winton, J. Ulrichs, A. Letessier-Selvon, D. Daniels, Giacomo Polesello, M. Tareb-Reyes, Michel Gouanère, F. Martelli, and N. Kent

Subjects
Physics, Nuclear and High Energy Physics, Strange quark, Particle physics, 010308 nuclear & particles physics, Star (game theory), Hadron, Hyperon, Física, Lambda, 01 natural sciences, Nuclear physics, 0103 physical sciences, neutrino interactions, strange particle production, Production (computer science), High Energy Physics::Experiment, Neutrino, 010306 general physics, Nuclear Experiment, Charged current, Particle Physics - Experiment
Abstract

A study of strange particle production in $\nu_\mu$ charged current interactions has been performed using the data from the NOMAD experiment. Yields of neutral strange particles ($K^0_s, \Lambda, \bar{\Lambda}$) have been measured. Mean multiplicities are reported as a function of the event kinematic variables $E_\nu$, $W^2$ and $Q^2$ as well as of the variables describing particle behaviour within a hadronic jet: $x_F$, $z$ and $p_T^2$. Decays of resonances and heavy hyperons with identified $K^0_s$ and $\Lambda$ in the final state have been analyzed. Clear signals corresponding to $\rm {K^\star}^\pm$ $\rm {\Sigma^\star}^\pm$, $\rm \Xi^-$ and $\rm \Sigma^0$ have been observed. A study of strange particle production in ν μ charged current interactions has been performed using the data from the NOMAD experiment. Yields of neutral strange particles ( K 0 s ,Λ, Λ ̄ ) have been measured. Mean multiplicities are reported as a function of the event kinematic variables E ν , W 2 and Q 2 as well as of the variables describing particle behaviour within a hadronic jet: x F , z and p T 2 . Decays of resonances and heavy hyperons with identified K 0 s and Λ in the final state have been analyzed. Clear signals corresponding to K ★± , Σ ★± , Ξ − and Σ 0 have been observed. A study of strange particle production in muon neutrino charged current interactions has been performed using the data from the NOMAD experiment. Yields of neutral strange particles K0s, Lambda, AntiLambda have been measured. Mean multiplicities are reported as a function of the event kinematic variables Enu, W2 and Q2 as well as of the variables describing particle behaviour within a hadronic jet: xF, z and pT2. Decays of resonances and heavy hyperons with identified K0s and Lambda in the final state have been analyzed. Clear signals corresponding to K*+-, Sigma*+-, Xi- and Sigma0 have been observed.

Published
2002

16. Neutrino production of opposite sign dimuons in the NOMAD experiment

Author

Malcolm Ellis, J.J. Gómez-Cadenas, E. Manola-Poggioli, Alexey Krasnoperov, F. Salvatore, M. K. Vo, M. Baldo-Ceolin, K. Benslama, O.L. Klimov, T. Vinogradova, S. Tereshchenko, M. Mezzetto, E. do Couto e Silva, J. Long, Kai Zuber, J. Dumarchez, Vyacheslav Valuev, J. Bouchez, B. A. Popov, M. T. Tran, C. Nguyen-Mau, T. Del Prete, A. Lupi, J. M. Gaillard, D. Hubbard, P. Zuccon, K. Schahmaneche, D. Verkindt, Caroline Poulsen, R. Cousins, A. Marchionni, A. Godley, J.-M. Vieira, P. Astier, T. Dignan, P. Hurst, S.R. Mishra, E. Tsesmelis, Caren Hagner, L. Di Lella, M. Valdata-Nappi, I. Bird, T. Schmidt, F. Juget, M. Veltri, A. Kovzelev, Chiara Roda, A. Letessier-Selvon, Domizia Orestano, G. Collazuol, Mario Stipčević, M. E. Sevior, F. Bobisut, D. Daniels, Giacomo Polesello, A. Pluquet, M. Tareb-Reyes, Valentin Kuznetsov, M. Contalbrigo, J-P. Meyer, J.-P. Mendiburu, A. Placci, L. La Rotonda, Alessandro Cardini, Kevin Varvell, S.N. Tovey, L.J. Winton, M. Kirsanov, E. Pennacchio, N. Hyett, Fr Pastore, André Rubbia, A. Grant, H. Pessard, P. Nedelec, J. Ulrichs, E. Iacopini, A. De Santo, Vincenzo Cavasinni, G. Sozzi, Barry Blumenfeld, C. Conta, Claus Gößling, B. Schmidt, G. Conforto, Michel Gouanère, J. Kokkonen, F. Martelli, Nathalie Besson, J. A. Hernando, D. Steele, L. Mossuz, D. Sillou, R. Petti, A. Guglielmi, M. Steininger, Roberto Ferrari, J. M. Levy, A. Lanza, Stefano Lacaprara, Fergus Wilson, G. Bassompierre, S. Boyd, B. Lakić, G. N. Taylor, Giacomo Graziani, Yu. Nefedov, L. Vacavant, A. Cervera-Villanueva, Bruce Yabsley, X. Méchain, L. Camilleri, H. Degaudenzi, G. J. Feldman, G. F. Moorhead, D. Autiero, A. M. Touchard, V. Flaminio, F. J. P. Soler, A. Polyarush, Achim Geiser, T. Weisse, P. Rathouit, Marco Fraternali, L. Linssen, J. Gosset, Didier Ferrere, Sergei Gninenko, D. Pollmann, D. Gibin, T. Stolarczyk, F.V. Weber, F. Vannucci, M. Banner, Antonio Bueno, A. N. Toropin, U. Stiegler, T. Fazio, H. Zaccone, E. Gangler, D. Geppert, C. Joseph, P.W. Cattaneo, Ante Ljubičić, L.S. Peak, S.A. Bunyatov, A. Baldisseri, G. Ballocchi, Marco Laveder, Valerio Vercesi, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), NOMAD, and BOMBAR, Claudine

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Branching fraction, Order (ring theory), Física, 01 natural sciences, Charm quark, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Production (computer science), Neutrino, 010306 general physics, Nucleon, Particle Physics - Experiment, Energy (signal processing)
Abstract

The NOMAD Collaboration presents a study of opposite sign dimuon events in the framework of Leading Order QCD. A total of 2714 neutrino- and 115 antineutrino-induced opposite sign dimuon events with $E_{\mu 1}, E_{\mu 2} > 4.5$ GeV, $15 < E_{\nu} < 300$ GeV and $Q^{2} > 1\;(\mbox{GeV}/\mbox{c})^{2}$ are observed %in the data from the 1995 and 1996 runs. in the Front-Calorimeter of NOMAD during the 1995 and 1996 runs. The analysis yields a value for the charm quark mass of $m_{c} = 1.3^{+0.3\;+0.3}_{-0.3\;-0.3}\;\mbox{GeV}/\m box{c}^{2}$ and for the average semileptonic branching ratio of $B_{c} = 0.095^{+0.007\;+0.014}_{-0.007\;-0.013}$. The ratio of the strange to non-strange sea in the nucleon is measured to be $\kappa = 0.48^{+0.09 +0.17}_{-0.07 -0.12}$. The measured rate of charm-induced dimuon relative to single muon, as a function of neutrino energy, is consistent with the slow rescaling hypothesis of heavy quark production.

Published
2000

17. Search for heavy neutrinos mixing with tau neutrinos

Author

P. Astier, D. Autiero, A. Baldisseri, M. Baldo-Ceolin, M. Banner, G. Bassompierre, K. Benslama, N. Besson, I. Bird, B. Blumenfeld, F. Bobisut, J. Bouchez, S. Boyd, A. Bueno, S. Bunyatov, L. Camilleri, A. Cardini, P.W. Cattaneo, V. Cavasinni, A. Cervera-Villanueva, G. Collazuol, G. Conforto, C. Conta, M. Contalbrigo, R. Cousins, D. Daniels, H. Degaudenzi, T. Del Prete, A. De Santo, T. Dignan, L. Di Lella, E. do Couto e Silva, I.J. Donnelly, J. Dumarchez, M. Ellis, T. Fazio, G.J. Feldman, R. Ferrari, D. Ferrère, V. Flaminio, M. Fraternali, J.-M. Gaillard, E. Gangler, A. Geiser, D. Geppert, D. Gibin, S.N. Gninenko, A. Godley, M.C. Gonzalez-Garcia, J.-J. Gomez-Cadenas, J. Gosset, C. Gößling, M. Gouanère, A. Grant, G. Graziani, A. Guglielmi, C. Hagner, J. Hernando, D. Hubbard, P. Hurst, N. Hyett, E. Iacopini, C. Joseph, F. Juget, M.M. Kirsanov, O. Klimov, J. Kokkonen, A.V. Kovzelev, N.V. Krasnikov, A. Krasnoperov, S. Lacaprara, C. Lachaud, B. Lakić, A. Lanza, L. La Rotonda, M. Laveder, A. Letessier-Selvon, J.-M. Levy, L. Linssen, A. Ljubičić, J. Long, A. Lupi, A. Marchionni, F. Martelli, X. Méchain, J.-P. Mendiburu, J.-P. Meyer, M. Mezzetto, S.R. Mishra, G.F. Moorhead, D. Naumov, P. Nédélec, Yu. Nefedov, C. Nguyen-Mau, D. Orestano, F. Pastore, L.S. Peak, E. Pennacchio, H. Pessard, R. Petti, A. Placci, G. Polesello, D. Pollmann, A. Polyarush, B. Popov, C. Poulsen, P. Rathouit, J. Rico, C. Roda, A. Rubbia, F. Salvatore, K. Schahmaneche, B. Schmidt, G. Segneri, M. Sevior, F.J.P. Soler, G. Sozzi, D. Steele, U. Stiegler, M. Stipčević, Th. Stolarczyk, M. Tareb-Reyes, G.N. Taylor, V. Tereshchenko, A.N. Toropin, A.-M. Touchard, S.N. Tovey, M.-T. Tran, E. Tsesmelis, J. Ulrichs, L. Vacavant, M. Valdata-Nappi, V. Valuev, F. Vannucci, K.E. Varvell, M. Veltri, V. Vercesi, G. Vidal-Sitjes, J.-M. Vieira, T. Vinogradova, F.V. Weber, T. Weisse, F.F. Wilson, L.J. Winton, B.D. Yabsley, H. Zaccone, K. Zuber, P. Zuccon, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), NOMAD, and BOMBAR, Claudine

Subjects
Nuclear and High Energy Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Proton, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Big Bang nucleosynthesis, Tau neutrino, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Mixing (physics), Physics, Range (particle radiation), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Física, 3. Good health, neutrino mixing, neutrino decay, High Energy Physics::Experiment, Neutrino, Anomaly (physics), Event (particle physics), Particle Physics - Experiment
Abstract

We report on a search for heavy neutrinos ($\nus$) produced in the decay $D_s\to \tau \nus$ at the SPS proton target followed by the decay $\nudecay$ in the NOMAD detector. Both decays are expected to occur if $\nus$ is a component of $\nu_{\tau}$.\ From the analysis of the data collected during the 1996-1998 runs with $4.1\times10^{19}$ protons on target, a single candidate event consistent with background expectations was found. This allows to derive an upper limit on the mixing strength between the heavy neutrino and the tau neutrino in the $\nus$ mass range from 10 to 190 $\rm MeV$. Windows between the SN1987a and Big Bang Nucleosynthesis lower limits and our result are still open for future experimental searches. The results obtained are used to constrain an interpretation of the time anomaly observed in the KARMEN1 detector.\, Comment: 20 pages, 7 figures, a few comments added

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