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1. 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

2. 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

3. A new determination of αs using direct photon production cross sections in pp and collisions at GeV

Author

D. Ruegger, Richard Breedon, R.W Rusack, G. Ballocchi, D. Hubbard, C. Joseph, C. Morel, M. Werlen, G. Sozzi, R.L. Cool, P. Oberson, A. Vacchi, M. T. Tran, W. Kubischta, L. Studer, G. Valenti, Oliver E. Overseth, M. C. Nguyen, E. C. Dukes, J. P. Perroud, C. Comtat, Peter Timothy Cox, P Giacomelli, Gregory R Snow, Louis Dick, J.L. Pages, J.B. Jeanneret, L. Camilleri, P. Cushman, and V. Singh

Subjects
Quantum chromodynamics, Nuclear physics, Physics, Quark, Nuclear and High Energy Physics, Cross section (physics), Photon, Large Hadron Collider, Strong coupling, Production (computer science), Deep inelastic scattering
Abstract

Direct photon production cross sections obtained in high statistics p p and pp collisions at s =24.3 GeV at the CERN SPS are used in a next-to-leading order QCD analysis. From the cross section difference σ( p p → γX)−σ(pp → γX) and quark distributions measured in deep inelastic scattering, a determination of the strong coupling constant, α s , is performed via a measurement of Λ (4) MS . This measurement yields a value Λ (4) MS = 210±22 ( stat. )±44 ( syst. ) +105 −36 ( theo. ) MeV. The corresponding value of α s expressed at M 2 Z is α s (M 2 Z )=0.1112 ±0.0016 ( stat. ) ±0.0033 ( syst. ) +0.0077 −0.0034 ( theo. ) .

Published
1999

4. 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

5. 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

6. Structure of the recoiling system in direct-photon andπ0production byπ−andpbeams at 500 GeV/c

Author

D. Orris, P. Lukens, G. Ginther, W. Desoi, F. Lobkowicz, S. Mani, R. K. Shivpuri, W. Faissler, G. Glass, S. Blusk, I. Kourbanis, N. Varelas, K. Ruddick, W. S. Toothacker, Brajesh C Choudhary, P. F. Shepard, Phillip Gutierrez, J. Whitmore, W. Baker, M. J. Glaubman, L. de Barbaro, D. Berg, R. J. Miller, M. Zielinski, D. Weerasundara, S. Easo, C. Johnstone, G. Ballocchi, C. Chandlee, D. Skow, A. Lanaro, C. A. Nelson, R. Benson, T. Chand, E. Pothier, A. Sinanidis, C. Bromberg, E. Engels, J. Huston, Thomas Ferbel, B.Y. Oh, C. Lirakis, R. Roser, D. Garelick, A. Maul, George Alverson, C. Yosef, L. Sorrell, V. Kapoor, Patrick Slattery, David Brown, W. Długosz, J. Dunlea, B. M. Rajaram, T. Yasuda, K. Hartman, J. Mansour, G. Fanourakis, E.J. Prebys, W. H. Chung, D. Carey, and G. Wu

Subjects
Physics, Nuclear physics, Massless particle, Quantum chromodynamics, Particle physics, Pion, Meson, Hadron, High Energy Physics::Experiment, Elementary particle, Parton, Nuclear Experiment, Charged particle
Abstract

We present the results of a study of hadronic jets produced in association with direct photons and [pi][sup 0]'s at large transverse momenta in [pi][sup [minus]]Be and [ital p]Be collisions at 500 GeV/[ital c]. Using primarily charged particles to characterize the properties of the recoiling jets, we compare their fragmentation and angular distributions, and their correlation with the trigger particle, for both the [gamma] and [pi][sup 0] event samples. We also compare the data with QCD calculations that incorporate current parton distribution fuctions.

Published
1994

7. Determination of αs and the gluon distribution using direct photon production in and pp collisions

Author

C. Joseph, M. T. Tran, D. Ruegger, L. Camilleri, Roger Rusack, J.L. Pagès, J. P. Perroud, W. Kubischta, F. Gaille, Oliver E. Overseth, Louis Dick, P.T. Cox, E.C. Dukes, L. Studer, Gregory R Snow, G. Valenti, P. Oberson, R.L. Cool, G. Ballocchi, A. Vacchi, D. Hubbard, Paolo Giacomelli, M. Werlen, E. Malamud, P. Cushman, C. Morel, D. Steiner, V. Singh, R. E. Breedon, J. F. Loude, A. Bernasconi, B. Gabioud, J.B. Jeanneret, and G. Sozzi

Subjects
Nuclear physics, Physics, Quark, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Photon, Large Hadron Collider, Proton, Elementary particle, Deep inelastic scattering, Gluon
Abstract

Direct photon cross sections obtained in p p and pp collisions at √s = 24.3 GeV at the CERN SPS, are used in a next-to-leading order QCD analysis. From the cross-section difference σ( p p → γX) − σ (pp → γX) , and quark distributions measured in deep inelastic scattering, a determination of the strong coupling constant, αs, is performed via a measurement of Λ (4) MS . This first measurement of Λ (4) MS using direct photon data yields a value Λ (4) MS = 235 ± 79 (stat.) ± 70 (syst.) MeV. The corresponding value of αs expressed at MZ2 is αs (MZ2) = 0.112±0.006 (stat.)±0.005 (syst.)−0.001+0.009 (theor.). The gluon distribution in the proton for x > 0.2 is determined both from the p p and from the pp data, and the results agree with each other and with previous determinations using the same method.

Published
1993

8. Direct photon production in and pp interactions at √s = 24.3 GeV

Author

B. Gabioud, D. Hubbard, M. Werlen, C. Morel, Paolo Giacomelli, C. Joseph, P. Oberson, E. Malamud, R.L. Cool, G. Ballocchi, J.L. Pagès, A. Vacchi, Roger Rusack, G. Sozzi, Louis Dick, P.T. Cox, F. Gaille, Gregory R Snow, L. Camilleri, G. Valenti, D. Ruegger, J. P. Perroud, A. Bernasconi, P. Cushman, D. Steiner, V. Singh, W. Kubischta, E.C. Dukes, J.B. Jeanneret, L. Studer, R. E. Breedon, J. F. Loude, M. T. Tran, and Oliver E. Overseth

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, Annihilation, Large Hadron Collider, Elementary particle, Nuclear Experiment
Abstract

Inclusive direct photon invariant cross sections have been measured in both p p and pp collisions at √ s = 24.3 GeV at the CERN SPS, permitting the first measurement of the difference of the p p and pp cross sections. The direct photon cross section in p p collisions has been found to be systematically larger than that in pp collisions, which indicates a significant contribution of the q q annihilation term as predicted by theoretical calculations.

Published
1993

9. Production of direct photons and neutral mesons at large transverse momenta byπ−andpbeams at 500 GeV/c

Author

M. J. Glaubman, Patrick Slattery, C. Nelson, S. Mani, P. F. Shepard, W. S. Toothacker, W. Długosz, S. Blusk, G. Wu, E. Engels, I. Kourbanis, C. Lirakis, F. Lobkowicz, T. Yasuda, Thomas Ferbel, K. Ruddick, W. Faissler, T. Chand, R. J. Miller, D. Berg, J. Mansour, R. Benson, Carol Johnstone, A. Lanaro, D. Orris, J. Huston, D. Weerasundara, P. Lukens, A. Sinanidis, C. Chandlee, C. Bromberg, G. Fanourakis, W. Desoi, R. K. Shivpuri, A. Maul, E. Pothier, L. Sorrell, K. Hartman, J. J. Whitmore, George Alverson, Phillip Gutierrez, N. Varelas, M. Zielinski, C. Yosef, G. Ginther, D. Garelick, G. Glass, R. Roser, D. Carey, G. Ballocchi, David Brown, S. Easo, B. M. Rajaram, Brajesh C Choudhary, L. de Barbaro, V. Kapoor, E.J. Prebys, J. Dunlea, W. F. Baker, W. H. Chung, D. Skow, and B.Y. Oh

Subjects
Nuclear physics, Quantum chromodynamics, Physics, Massless particle, Particle physics, Pion, Meson, Hadron, Rapidity, Elementary particle, Boson
Abstract

We present results from the initial run of Fermilab experiment E706. The data include incident [pi][sup [minus]] and [ital p] beams at 500 GeV/[ital c] on Be and Cu targets, and span the kinematic ranges of transverse momentum and rapidity of 3.5[le][ital p][sub [ital T]][le]10 GeV/[ital c] and [minus]0.7[le][ital y][sub c.m.][le]0.7, respectively. We have measured cross sections for [pi][sup 0] and direct-photon production, as well as the [eta]/[pi][sup 0] production ratio. From the data on Be and Cu, we have extracted the nuclear dependence of [pi][sup 0] production, parametrized as [ital A][sup [alpha]]. The cross sections are compared with next-to-leading-log QCD predictions for different choices of the QCD momentum scales and several sets of parton distribution functions.

Published
1993

10. Beam test of a large area silicon drift detector

Author

Pavel Rehak, G. Ballocchi, P.T. Cox, P. Giacomelli, A. Vacchi, J. Kemmer, F. Palma, Marco Sampietro, S. Chinnici, Andrea Castoldi, Peter Holl, E. Gatti, and Antonio Francesco Longoni

Subjects
Physics, Nuclear and High Energy Physics, Silicon drift detector, Physics::Instrumentation and Detectors, business.industry, Position resolution, Planar, Pion beam, Optics, Optoelectronics, business, Instrumentation, Image resolution, Beam (structure)
Abstract

The results from the tests of the first large area (4 × 4 cm 2 ) planar silicon drift detector prototype in a pion beam are reported. The measured position resolution in the drift direction is σ = 40± 10 μ m.

Published
1993

11. Production ofπ0mesons at highpTinπ−BeandpBecollisions at 500 GeV/c

Author

S. Blusk, E. Prebys, M. J. Glaubman, F. Lobkowicz, W. Faissler, D. Carey, David Brown, S. Easo, A. Lanaro, R. J. Miller, T. Yasuda, G. Ginther, J. J. Whitmore, D. Berg, J. Huston, G. Glass, D. Skow, N. Varelas, B. M. Rajaram, R. K. Shivpuri, W. S. Toothacker, A. Sinanidis, B.Y. Oh, George Alverson, C. Yosef, D. Garelick, Phillip Gutierrez, L. de Barbaro, W. F. Baker, P. Lukens, W. Desoi, V. Kapoor, T. Chand, K. Hartman, D. Orris, Carol Johnstone, D. Weerasundara, W. H. Chung, Patrick Slattery, J. Dunlea, C. Chandlee, G. Ballocchi, S. Mani, W. Długosz, G. Wu, E. Pothier, Brajesh C Choudhary, P. F. Shepard, E. Engels, G. Fanourakis, I. Kourbanis, C. Lirakis, R. Benson, M. Zielinski, C. Nelson, Thomas Ferbel, R. Roser, A. Maul, C. Bromberg, L. Sorrell, K. Ruddick, and J. Mansour

Subjects
Quantum chromodynamics, Nuclear physics, Physics, Particle physics, Pion, Meson, Hadron, Production (computer science), Rapidity, Elementary particle, Boson
Abstract

We present new measurements of {pi}{sup 0} production at high transverse momenta ({ital p}{sub {ital T}}) for {pi}{sup {minus}} and {ital p} interactions on Be and Cu targets at 500 GeV/{ital c}. The observed dependence of the yields as a function of {ital p}{sub {ital T}} and rapidity ({ital y}) is compared with expectations from leading-log QCD over a kinematic range in which the inclusive cross sections fall by more than 4 orders of magnitude.

Published
1992

12. Direct photon production at highpTinπ−Be andpBe collisions at 500 GeV/c

Author

D. Berg, E.J. Prebys, M. Zielinski, G. Fanourakis, G. Wu, C. Nelson, Thomas Ferbel, K. Ruddick, R. Roser, George Alverson, G. Ginther, M. J. Glaubman, C. Yosef, R. J. Miller, E. Engels, I. Kourbanis, F. Lobkowicz, G. Glass, L. de Barbaro, C. Lirakis, S. Blusk, D. Weerasundara, B.Y. Oh, C. Chandlee, A. Sinanidis, T. Yasuda, E. Pothier, J. Mansour, A. Lanaro, W. Faissler, C. Bromberg, W. Desoi, Patrick Slattery, W. S. Toothacker, A. Maul, W. F. Baker, D. Skow, W. H. Chung, V. Kapoor, J. J. Whitmore, L. Sorrell, P. Lukens, W. Długosz, D. Garelick, G. Ballocchi, S. Mani, J. Dunlea, D. Carey, Brajesh C Choudhary, T. Chand, K. Hartman, Carol Johnstone, Phillip Gutierrez, S. Easo, R. Benson, D. Orris, J. Huston, David Brown, P. F. Shepard, B. M. Rajaram, R. K. Shivpuri, and Nikos Varelas

Subjects
Quark, Physics, Nuclear reaction, Quantum chromodynamics, Particle physics, Computer Science::Information Retrieval, General Physics and Astronomy, Elementary particle, Gluon, Nuclear physics, High Energy Physics::Experiment, Production (computer science), Rapidity, Nuclear Experiment, Isotopes of beryllium
Abstract

We report new measurements of inclusive direct photon production at high transverse momenta ({ital p}{sub {ital T}}) for {pi}{sup {minus}} and {ital p} interactions on Be at 500 GeV/{ital c}. The yields as a function of {ital p}{sub {ital T}} and rapidity ({ital y}) are in good agreement with expectations from next-to-leading-log QCD calculations employing recently extracted quark and gluon structure functions.

Published
1992

13. Fault analysis on AC/HV cable transmission lines

Author

Dario Zaninelli and G. Ballocchi

Subjects
Engineering, Electric power transmission, business.industry, Fault current limiter, Electrical engineering, Fault analysis, Fault (power engineering), business, Inductor, Cable transmission, Short circuit, Compensation (engineering)
Abstract

Summary form only given as follows. The subject of this paper is the analysis of the behaviour of an AC/HV (400 kV) cable line, compensated with shunted inductors, in the event of a fault. Comparisons are made between, and the consequences assessed for a three-phase, single and double phase-to-ground short circuit, starting from various operating conditions. The paper presents criteria applied for assessing the worst fault and the influence of compensating parameters under fault conditions, and for locating the most severe type of fault.

Published
2002

14. 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

15. Search for a new gauge boson in $\pi^{0}$ decays

Author

J. Altegoer, P. Astier, D. Autiero, A. Baldisseri, M. Baldo-Ceolin, G. Ballocchi, M. Banner, S. Basa, G. Bassompierre, K. Benslama, N. Besson, I. Bird, B. Blumenfeld, F. Bobisut, J. Bouchez, S. Boyd, A. Bueno, S. Bunyatov, L. Camilleri, A. Cardini, A. Castera, P.W. Cattaneo, V. Cavasinni, A. Cervera-Villanueva, G.M. Collazuol, G. Conforto, C. Conta, M. Contalbrigo, R. Cousins, D. Daniels, A.De Santo, T.Del Prete, T. Dignan, L.Di Lella, E. do Couto e Silva, I.J. Donnelly, J. Dumarchez, T. Fazio, G.J. Feldman, R. Ferrari, D. Ferrère, V. Flaminio, M. Fraternali, J-M. Gaillard, P. Galumian, E. Gangler, A. Geiser, D. Geppert, D. Gibin, S.N. Gninenko, 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, D. Kekez, B. Khomenko, M.M. Kirsanov, O. Klimov, J. Kokkonen, A.V. Kovzelev, V. Kuznetsov, S. Lacaprara, A. Lanza, L. La Rotonda, M. Laveder, A. Letessier-Selvon, J-M. Levy, L. Linssen, A. Ljubičić, J. Long, A. Lupi, E. Manola-Poggioli, A. Marchionni, F. Martelli, X. Méchain, J-P. Mendiburu, J-P. Meyer, M. Mezzetto, S.R. Mishra, G.F. Moorhead, L. Mossuz, P. Nédélec, Yu. Nefedov, C. Nguyen-Mau, D. Orestano, F. Pastore, L.S. Peak, E. Pennacchio, J-P. Perroud, H. Pessard, R. Petti, A. Placci, H. Plothow-Besch, A. Pluquet, G. Polesello, D. Pollmann, B.G. Pope, B. Popov, C. Poulsen, P. Rathouit, C. Roda, A. Rubbia, F. Salvatore, D. Scannicchio, K. Schahmaneche, B. Schmidt, A. Sconza, M. Serrano, M.E. Sevior, D. Sillou, F.J.P. Soler, G. Sozzi, D. Steele, P. Steffen, M. Steininger, U. Stiegler, M. Stipčević, T. Stolarczyk, M. Tareb-Reyes, G.N. Taylor, S. Tereshchenko, A.N. Toropin, A-M. Touchard, S.N. Tovey, M-T. Tran, E. Tsesmelis, J. Ulrichs, V. Uros, M. Valdata-Nappi, V. Valuev, F. Vannucci, K.E. Varvell, M. Veltri, V. Vercesi, D. Verkindt, J-M. Vieira, T. Vinogradova, M-K. Vo, S.A. Volkov, F. Weber, T. Weisse, M. Werlen, F. Wilson, L.J. Winton, B.D. Yabsley, H. Zaccone, and K. Zuber

Subjects
Physics, Nuclear and High Energy Physics, Gauge boson, Particle physics, Large Hadron Collider, Branching fraction, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Física, High Energy Physics - Experiment, Pion, Coulomb, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Primakoff effect, Energy (signal processing), Particle Physics - Experiment
Abstract

A search was made for a new light gauge boson $X$ which might be produced in $\pi^{0}\to\gamma + X$ decay from neutral pions generated by 450-GeV protons in the CERN SPS neutrino target. The X's would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect, in the process of $X \to\pi^{0}$ conversion in the external Coulomb field of a nucleus. With $1.45\times10^{18}$ protons on target, 20 candidate events with energy between 8 and 140 GeV were found from the analysis of neutrino data. This number is in agreement with the expectation of 18.1$\pm$2.8 background events from standard neutrino processes. A new 90% C.L. upper limit on the branching ratio $Br(\pi^{0}\to\gamma + X)< (3.3 to 1.9) \times10^{-5}$ for $X$ masses ranging from 0 to 120 MeV/c^2 is obtained., Comment: 15 pages, LaTex, 6 eps figures included, submitted to Physics Letters B

Published
1998

16. Direct photon cross sections in proton-proton and antiproton-proton interactions at root s=24.3 GeV

Author

Richard Breedon, D. Ruegger, Oliver E. Overseth, C. Comtat, C. Joseph, Gregory R Snow, C. Morel, Peter Timothy Cox, Louis Dick, E. C. Dukes, J.L. Pages, W. Kubischta, R.L. Cool, M. T. Tran, G. Valenti, A. Vacchi, L. Camilleri, J. P. Perroud, G. Ballocchi, G. Sozzi, D. Hubbard, L. Studer, Roger Rusack, M. Werlen, M. C. Nguyen, J.B. Jeanneret, P. Oberson, P. Giacomelli, P. Cushman, and V. Singh

Subjects
Quantum chromodynamics, Physics, Particle physics, Nuclear and High Energy Physics, Large Hadron Collider, Photon, Proton, Jet (particle physics), law.invention, Nuclear physics, law, Antiproton, Rapidity, High Energy Physics::Experiment, Collider, Nuclear Experiment, Particle Physics - Experiment
Abstract

We report results on inclusive direct photon $(\gamma), \pi_0$, and $\eta$ production in both pp and \={p}p interactions at $\sqrt{s} = 24.3 $ GeV in the transverse momentum range {$4.1 \le p_T \le 7 .7$ GeV/$c$} and rapidity range \mbox{$-0.1 \le y \le 0.9$}. The data were collected between 1988 and 1990 by the UA6 experiment at CERN, which employed an internal $\mathrm{H_2}$ gas jet target in the S\={p}pS collider. The inclusive direct photon cross sections and the cross section difference \mbox{$\sigma(\overline{p}p) - \sigma(pp)$} expressed as functions of $p_T(\gamma)$ are compared w ith next-to-leading order QCD predictions.

Published
1998

17. MASS-SAT - MATTER-ANTIMATTER SPACE SPECTROMETER ON SATELLITE

Author

R. L. Golden, F. Massimo Brancaccio, M. P. De Pascale, M. Simon, P. Galeotti, M. Bocciolini, Giuseppe Basini, M. Candusso, A. Morselli, G. Ballocchi, Guido Barbiellini, P. Picozza, P. Spillantini, Marco Ricci, A. Vacchi, P. Goret, P. Carlson, Yi. F. Wang, C. De Marzo, F. Bongiorno, and O. Erriquez

Subjects
Physics, Spectrometer, Antiproton, Astrophysics::High Energy Astrophysical Phenomena, Antimatter, Polar orbit, Geostationary orbit, Astronomy, Satellite, Cosmic ray, Cosmology
Abstract

The MASS-SAT Experiment (Matter-Antimatter Space Spectrometer on SATellite) presented here is conceived to search for an experimental answer to many open problems related to both Astrophysics and Physics, through the detection of positrons, antiprotons, nuclei and, overall, antinuclei if they exist. Among these problems there are the hypothesized presence of antigalaxies in the Universe (the matter-antimatter symmetry problem), the existence of black holes as possible antiproton sources (the Hawking effect), the existence of photinos as antiproton sources (related to the dark-matter problem), the understanding of the mechanism of cosmic-ray acceleration in the interstellar medium, the determination of the relative abundancies of isotopes in cosmic rays and many others. The choice of an orbit expecially appropriate for that (geostationary or polar orbit) as well as the choice of an apparatus composed only of solid-state detectors and permanent magnets (no gas and no liquid helium on board, avoiding complexity and the necessity of refilling) make it possible to conceive a long (4–5 years) period of data taking with unprecedented sensitivity in the low-energy region of the cosmic-ray spectrum. The MASS-SAT experiment shows itself as the prosecution of the MASS balloon-borne experiment and as the logical complement of the Astromag program on the Space Station Freedom.

Published
1990

18. Performance characteristics and radiation damage results from the Fermilab E706 silicon microstrip detector system

Author

Patrick Slattery, S. Easo, E. Pothier, R. Benson, W. F. Baker, Phillip Gutierrez, D. Berg, Carol Johnstone, K. Hartman, P. Lukens, P.D. Weerasundara, V. Kapoor, F. Lobkowicz, S. Mani, J. Mansour, G. Wu, E. Prebys, C. Bromberg, M. J. Glaubman, T. Yasuda, George Alverson, R. J. Miller, W. Faissler, E. Engels, I. Kourbanis, Brajesh C Choudhary, C. Yosef, C. Lirakis, A. Sinanidis, G. Pedeville, D. Skow, W. Desoi, D. Garelick, D. Orris, N. Varelas, W. S. Toothacker, A. Lanaro, K. Ruddick, B.Y. Oh, D. Carey, Joey Huston, M. Zielinski, C. Nelson, Thomas Ferbel, D. Brown, U. Joshi, G. Ginther, G. Ballocchi, L. Debarbaro, P. F. Shepard, R. K. Shivpuri, G. Fanourakis, J. Whitmore, and A. Nguyen

Subjects
Physics, Nuclear and High Energy Physics, Photon, Silicon, Spectrometer, Physics::Instrumentation and Detectors, business.industry, chemistry.chemical_element, Semiconductor device, Particle detector, Semiconductor detector, Nuclear physics, Optics, chemistry, Radiation damage, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, business, Instrumentation
Abstract

A charged particle spectrometer containing a 7120-channel silicon microstrip detector system, one component of Fermilab experiment E706 to study direct photon production in hadron-hadron collisions, was utilized in a run in which 6 million events were recorded. We describe the silicon system, provide early results of track and vertex reconstruction, and present data on the radiation damage to the silicon wafers resulting from the narrow high intensity beam.

Published
1989

19. Comparison of calorimetric profiles of top and QCD jets and possibilities of discriminating between them

Author

G. Ballocchi and R. Odorico

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Gain factor, Monte Carlo method, High Energy Physics::Experiment, Order of magnitude, Lepton
Abstract

A detailed study of calorimetric profiles of jets originated by top particle decays and of contaminating QCD jets, as seen by pp collider calorimeters, is made. Charged multiplicity information is also taken into consideration. Possibilities of discriminating between the two so as to increase the ratio of the top signal to background with minimal statistical losses for the former are discussed. On the basis of the simulated Monte Carlo jets, one finds that signal/background gains of about an order of magnitude can be achieved with a loss of ∼50% of top statistics, the gain factor moving up to almost two orders of magnitude if a loss of 90% is accepted. These results are obtained using discriminating techniques which exploit fully correlated information on the jet profiles. Although jet profile discrimination cannot compete with other well known methods (e.g. looking for large pT leptons) in establishing a top signal, it can represent a quite useful ingredient in phenomenological studies, as it is illustrated with a few examples.

Published
1983

20. A large liquid argon photon/hadron calorimeter for FNAL

Author

D. Garelick, T. Droege, C. Gupt, E. Engels, F. Lobkowicz, Arlene Lennox, H. Johnstad, G. Fanourakis, D. Berg, J.A. Thompson, R. J. Miller, J. Mansour, W. Faissler, A. Lanaro, R. K. Shivpuri, S. Heppelmann, M. J. Glaubman, S. Mani, W. Desoi, M. Shupe, D. P. Eartly, Phillip Gutierrez, A. N. Mitra, Patrick Slattery, G.A. Smith, S. Hossain, Joey Huston, W. F. Baker, E. A. Peterson, D. Brown, W.E. Cleland, C. Bromberg, D. Skow, D.D. Coon, K. Ruddick, D. Carey, N. Mathur, Thomas Ferbel, George Alverson, G. Ballocchi, Marvin L Marshak, Ken Heller, P. F. Shepard, T. Joyce, E. Pothier, J. Whitmore, G. Chandlee, and Charles A. Nelson

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Argon, Physics::Instrumentation and Detectors, Hadron, Detector, chemistry.chemical_element, Hadron calorimeter, Nuclear physics, chemistry, Liquid argon, High Energy Physics::Experiment, Instrumentation, Fermi Gamma-ray Space Telescope
Abstract

This paper describes a new liguid argon photon/hadron detector currently under construction for Experiment E706 at the Fermi National Accelerator Laboratory.

Published
1985

21. On nuclear dependence of direct photon production

Author

M. Zielinski and G. Ballocchi

Subjects
Physics, Quark, Particle physics, Photon, Physics and Astronomy (miscellaneous), Nuclear Theory, High Energy Physics::Phenomenology, EMC effect, Elementary particle, Parton, Photon structure function, Gluon, Nuclear physics, Quantum field theory, Nuclear Experiment, Engineering (miscellaneous)
Abstract

We have calculated the impact on theA dependence of direct photon production at large transverse momenta (pT) of models that were used successfully to explain the EMC effect. We find that, for energies andpT's typical of present direct photon measurements, the change in the photon yield due to nuclear modification of parton distributions can be expected to be about 15–20% on Fe. The effect is quite sensitive to the gluon distribution. In particular, for the models used in our calculations, theA dependence is affected more by the gluon distribution than by the quark distributions.

Published
1986

22. The string effect and independent fragmentation models: lore and facts

Author

G. Ballocchi and R. Odorico

Subjects
Quantum chromodynamics, Quark, Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Monte Carlo method, Parton, String theory, Theoretical physics, Fragmentation (mass spectrometry), Particle flow, Nuclear Experiment, Particle Physics - Phenomenology
Abstract

It is shown that the independent fragmentation model adequately describes the so-called “string effect”, after the Field-Feynman algorithm is duly corrected for the generation of soft particles. It is concluded that there is no need to assume string fragmentation or parton coherence to explain the effect.

Published
1989

23. Structure of the recoiling system in direct-photon and pi 0 production by pi - and p beams at 500 GeV/c.

Author

Alverson G, Baker WF, Ballocchi G, Benson R, Berg D, Blusk S, Bromberg C, Brown D, Carey D, Chand T, Chandlee C, Choudhary BC, Chung WH, de Barbaro L, DeSoi W, Dlugosz W, Dunlea J, Easo S, Engels E Jr, Faissler W, Fanourakis G, Ferbel T, Garelick D, Ginther G, Glass G, Glaubman M, Gutierrez P, Hartman K, Huston J, Johnstone C, Kapoor V V, Kourbanis I I, Lanaro A, Lirakis C, Lobkowicz F, Lukens P, Mani S, Maul A, Mansour J, Miller R, Nelson CA Jr, Oh B, Orris D, Pothier E, Prebys E, Rajaram BM, Roser R, Ruddick K, Shepard PF, Shivpuri RK, Sinanidis A, Skow D, Slattery P, Sorrell L, Toothacker W, Varelas N, Weerasundara D, Whitmore J, Wu G, Yasuda T, Yosef C, and Zielinski M

Published
1994
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24. Production of direct photons and neutral mesons at large transverse momenta by pi - and p beams at 500 GeV/c.

Author

Alverson G, Baker WF, Ballocchi G, Benson R, Berg D, Blusk S, Bromberg C, Brown D, Carey D, Chand T, Chandlee C, Choudhary BC, Chung WH, de Barbaro L, DeSoi W, Dlugosz W, Dunlea J, Easo S, Engels E Jr, Faissler W, Fanourakis G, Ferbel T, Garelick D, Ginther G, Glass G, Glaubman M, Gutierrez P, Hartman K, Huston J, Johnstone C, Kapoor V V, Kourbanis L, Lanaro A, Lirakis C, Lobkowicz F, Lukens P, Mani S, Maul A, Mansour J, Miller R, Nelson CA Jr, Oh BY, Orris D, Pothier E, Prebys E, Rajaram BM, Roser R, Ruddick K, Shepard P, Shivpuri RK, Sinanidis A, Skow D, Slattery P, Sorrell L, Toothacker W, Varelas N, Weerasundara D, Whitmore J, Wu G, Yasuda T, Yosef C, and Zielinski M

Published
1993
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25. Production of pi 0 mesons at high pT in pi -Be and pBe collisions at 500 GeV/c.

Author

Alverson G, Baker WF, Ballocchi G, Benson R, Berg D, Blusk S, Bromberg C, Brown D, Carey D, Chand T, Chandlee C, Choudhary BC, Chung WH, de Barbaro L, DeSoi W, Dlugosz W, Dunlea J, Easo S, Engels E Jr, Faissler W, Fanourakis G, Ferbel T, Garelick D, Ginther G, Glass G, Glaubman M, Gutierrez P, Hartman K, Huston J, Johnstone C, Kapoor V V, Kourbanis I I, Lanaro A, Lirakis C, Lobkowicz F, Lukens P, Mani S, Maul A, Mansour J, Miller R, Nelson CA Jr, Oh B, Orris D, Pothier E, Prebys E, Rajaram BM, Roser R, Ruddick K, Shepard P, Shivpuri RK, Sinanidis A, Skow D, Slattery P, Sorrell L, Toothacker W, Varelas N, Weerasundara D, Whitmore J, Wu G, Yasuda T, Yosef C, and Zielinski M

Published
1992
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26. Direct photon production at high pT in pi -Be and pBe collisions at 500 GeV/c.

Author

Alverson G, Baker WF, Ballocchi G, Benson R, Berg D, Blusk S, Bromberg C, Brown D, Carey D, Chand T, Chandlee C, Choudhary BC, Chung WH, de Barbaro L, DeSoi W, Dlugosz W, Dunlea J, Easo S, Engels E Jr, Faissler W, Fanourakis G, Ferbel T, Garelick D, Ginther G, Glass G, Glaubman M, Gutierrez P, Hartman K, Huston J, Johnstone C, Kapoor V V, Kourbanis I I, Lanaro A, Lirakis C, Lobkowicz F, Lukens P, Mani S, Maul A, Mansour J, Miller R, Nelson CA Jr, Oh B, Orris D, Pothier E, Prebys E, Rajaram BM, Roser R, Ruddick K, Shepard P, Shivpuri RK, Sinanidis A, Skow D, Slattery P, Sorrell L, Toothacker W, Varelas N, Weerasundara D, Whitmore J, Wu G, Yasuda T, Yosef C, and Zielinski M

Published
1992
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