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1. Study of opposite-sign dimuon production in high-energy neutrino-nucleon interactions

Author

D. Bogert, L.S. Osborne, U. Schneekloth, James K. Walker, V. Kistiakowsky, J.I. Friedman, Raymond Brock, G. Koizumi, F. E. Taylor, A. White, Henry W. Kendall, W. G. Cobau, M. Tartaglia, G.J. Perkins, T. Lyons, D. Owen, L. Stutte, R. Belusevic, J. Womersley, J. Bofill, B. Strongin, R. Hatcher, M. C. Goodman, M. Abolins, R. Pitt, S. Fuess, and H. Weerts

Subjects
Physics, Semileptonic decay, Particle physics, Meson, Branching fraction, High Energy Physics::Phenomenology, Hadron, Elementary particle, Nuclear physics, Pair production, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, Nucleon
Abstract

Results are presented of a study of opposite-sign dimuon events observed in a fine-grained neutrino detector exposed to the Fermilab Tevatron wide-band neutrino beam. A total of 300 background-corrected ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ events induced by incident neutrinos and antineutrinos with energies up to 500 GeV were accumulated. The data were analyzed in terms of a model based on charmquark production followed by semileptonic decay of the charmed meson. The Cabibbo-Kobayashi-Maskawa matrix terms were found to be ${|{U}_{\mathrm{cd}}|}^{2}=0.0378\ifmmode\pm\else\textpm\fi{}0.0127 {(\mathrm{stat})}_{\ensuremath{-}0.0082}^{+0.0099} (\mathrm{syst})$, and $\ensuremath{\kappa}{|{U}_{\mathrm{cs}}|}^{2}=0.391\ifmmode\pm\else\textpm\fi{}0.076 {(\mathrm{stat})}_{\ensuremath{-}0.066}^{+0.097} (\mathrm{syst})$. The ratio of the strange to nonstrange sea in the nucleon, $\ensuremath{\kappa}=\frac{2S}{(\overline{U}+\overline{D})}$, was measured to be 0.407\ifmmode\pm\else\textpm\fi{}0.075 ${(\mathrm{stat})}_{\ensuremath{-}0.069}^{+0.103}$ (syst).

Published
1991
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2. Rapidities of produced particles in 200-GeV/cπ+/p/K+interactions on Au, Ag, and Mg

Author

R. Steiner, R. Hulsizer, K. Tamai, K. Hasegawa, D. H. Brick, P. C. Trepagnier, J. Grunhaus, Aharon Levy, G. Introzzi, R. Dolfini, H. J. Hargis, A. Rafatian, E. L. Koller, P. Beilliere, S. Tether, Kazuo Abe, W. Busza, E.D. Alyea, R.J. Plano, B. Cole, G. Alexander, C. Castoldi, E. Calligarich, P. Haridas, S. Ratti, E. S. Hafen, Y. Otani, M. Sato, R. Dimarco, H. D. Taft, H. Yuta, G. T. Condo, C. Milstene, M. Badiak, I. A. Pless, H. O. Cohn, M. Kalelkar, M. Bloomer, V. Suchorebrow, J. Bober, B. F. Wadsworth, M. Widgoff, M. Higuchi, T. Kitagaki, P. F. Jacques, E. L. Hart, W. M. Bugg, R. J. Ledoux, J. L. Narjoux, T. Handler, Y. Wu, N. Gelfand, T. B. Stoughton, Akira Yamaguchi, A. H. Rogers, S. H. Oh, T. Ludlam, S. Steadman, D. Huang, E. B. Brucker, R. K. Yamamoto, V. Kistiakowsky, H. Z. Huang, L. Grodzins, T. A. Fuess, P. Lutz, P. E. Stamer, S. Noguchi, S. Tanaka, J. E. Brau, Y. Hayaschino, and T. A. Frank

Subjects
Nuclear reaction, Physics, Alkaline earth metal, Meson, Computer Science::Information Retrieval, Nuclear Theory, Pi, Parton, Rapidity, Atomic physics, Nuclear Experiment, Plateau (mathematics), Central region
Abstract

We have used the Fermilab 30-in. bubble chamber--hybrid spectrometer to study the rapidities of produced particles'' in the interactions of 200-GeV/{ital c} protons and {pi}{sup +} and {ital K}{sup +} mesons with nuclei of gold, silver, and magnesium. The average rapidity decreases linearly with the number of projectile collisions {nu}{sub {ital p}} (up to {nu}{sub {ital p}}=5) with no {ital A} dependence and little beam dependence. The ratio {ital R} of normalized rapidity distributions for hadron-nucleus to hadron-proton interactions shows a plateau in the central region, and becomes much larger in the target region. However, the increase is significantly less than has been reported in previous experiments. As a function of {nu}{sub {ital p}}, the ratio {ital R} rises linearly in the target region, more gently in the central region, and decreases slowly in the projectile region, in all cases with no {ital A} dependence. Some discrepancies with a previous experiment are observed in the central region. Long-range rapidity correlations are observed in hadron-nucleus events, but not in hadron-proton events. For the former, it is shown that the correlations exist only for those events with multiple projectile collisions, as expected in the multichain dual parton model.

Published
1990
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3. Search for neutral weakly interacting massive particles in the Fermilab Tevatron wideband neutrino beam

Author

V. Kistiakowsky, T. Lyons, D. Owen, L.S. Osborne, James K. Walker, H. Weerts, G. Koizumi, L. Stutte, U. Schneekloth, R. Pitt, D. Bogert, M. Abolins, R. Hatcher, A. White, W. G. Cobau, G.J. Perkins, S. Fuess, W. J. Womersley, Henry W. Kendall, L. Rosenson, E. Gallas, J.I. Friedman, B. Strongin, Raymond Brock, F. E. Taylor, and M. Tartaglia

Subjects
Physics, Quark, Nuclear physics, Particle physics, Weakly interacting massive particles, High Energy Physics::Phenomenology, Tevatron, Production (computer science), High Energy Physics::Experiment, Fermilab, Wideband, Neutrino beam, Particle identification
Abstract

A time-of-flight technique has been used to search for neutral weakly interacting massive particles in the wideband neutrino beam at the Fermilab Tevatron. Limits at the 90% confidence level are reported herein for (a) heavy neutrino production from the decay of heavy quark states, (b) massive objects directly produced in 800 GeV/c pN interactions that are noninteracting but unstable with a mean lifetime between ${10}^{\mathrm{\ensuremath{-}}8}$ and ${10}^{\mathrm{\ensuremath{-}}4}$ s, and (c) directly produced massive objects that are stable but weakly interacting with interaction cross sections between ${10}^{\mathrm{\ensuremath{-}}29}$ and ${10}^{\mathrm{\ensuremath{-}}31}$ ${\mathrm{cm}}^{2}$.

Published
1995

4. A two-component model for two-body nucleon diffraction dissociation and comparison with data from π-p at 3.9 GeV/c and p-p at fermilab and ISR energies

Author

R. K. Yamamoto, V. Kistiakowsky, J. Grunhaus, A. Levy, R. I. Hulsizer, I. A. Pless, E. S. Hafen, G. Berlad, U. Karshon, M.F. Hodous, and J. Wolfson

Subjects
Nuclear physics, Physics, Diffraction, Nuclear and High Energy Physics, High energy, Amplitude, Isospin, Fermilab, Nucleon, Low Mass, Dissociation (chemistry)
Abstract

The isospin | M 1 2 o | 2 amplitude measured by means of π±p interactions at 3.9 GeV/c is compared to the low mass diffraction dissociation distributions in the process p+p→p+X at incident momentum from 175 to 400 GeV/c and p+p→(nπ+)+p at 1500 GeV/c. The comparison is made within the framework of a two-component model which predicts that the properties of the |M 1 2 o | 2 amplitude at 3.9 GeV/c should be describe the p-p process. This predictio n is shown to be in excellent agreement with the high energy data.

Published
1975
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5. Leading particles and diffraction dissociation in 150-GeV/cπ−pinteractions

Author

A. Napier, T. L. Watts, E. S. Hafen, E.D. Alyea, H. Kraybill, H. D. Taft, W. M. Bugg, T. Handler, G. T. Condo, E. L. Hart, D. Bogert, M. Widgoff, U. Karshon, E. L. Koller, P. E. Stamer, A. M. Shapiro, Marvin Johnson, J. F. Brau, J. P. Silvermann, R. A. Burnstein, V. Kistiakowsky, Odette Benary, F. Barriero, P.F. Jacques, J. Tortora, D. Ljung, H. O. Cohn, D. Fong, H. A. Rubin, Aharon Levy, A. Snyder, R. D. Sard, S. Taylor, I. A. Pless, D. H. Brick, A. Pevsner, F. Bruyant, T.C. Ou, J. Grunhaus, R. Zdanis, M. Robertson, D. Petersen, P. W. Lucas, E. B. Brucker, C. Y. Chien, T. Ludlam, J. Wolfson, R.J. Plano, M. Heller, P. C. Trepagnier, C. Fu, R. I. Hulsizer, and R. K. Yamamoto

Subjects
Nuclear physics, Physics, Baryon, Pion, Recoil, Meson, Hadron, Analytical chemistry, Elementary particle, Neutron, Boson
Abstract

Diffraction dissociation of both the beam and target particles has been observed in 150-GeV/c ..pi../sup -/p interactions in the Fermilab 30-in.-bubble-chamber--proportional-wire-chamber hybrid spectrometer. The dissociations are observed as recoil systems opposite leading particles, the signals of which are separated from background where appropriate by a variant of the Van Hove sector cut, thus allowing the high-mass portion of the spectrum to be observed. Pion dissociation has a cross section of 1758 +- 105 ..mu..b, divided among two-, four-, and six-prong events; some rho/sup 0/ production is seen and comes primarily from the ..pi../sup -/ ..-->.. 2..pi../sup -/..pi../sup +/ channel. The proton dissociation cross section is 1726 +- 100 ..mu..b, again divided among two-, four-, and six-prong events. The final state contains a neutron more frequently than a proton in the two- and six-prong events, a proton more frequently in the four-prong events. Production of ..delta../sup + +/ is observed in the p ..-->.. p..pi../sup +/..pi../sup -/ dissociations.

Published
1980
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6. Someg(1700)decay modes

Author

P. Haridas, Yong-Shi Wu, G. T. Condo, S. H. Oh, I. A. Pless, J. P. Silverman, Akira Yamaguchi, P. C. Trepagnier, R. I. Hulsizer, E. S. Hafen, Fernando Barreiro, V. Kistiakowsky, T. Maruyama, H. Yuta, D. Hochman, K. Tamai, S. Tanaka, T. Kitagaki, J. E. Brau, A. Napier, Yoshinobu Unno, O. Benary, R. K. Yamamoto, R. Kikuchi, T. Handler, H.O. Cohn, M. F. Hodous, K. Abe, Kazuo Hasegawa, S. Noguchi, J. Wolfson, R. Dolfini, T. Nozaki, W. M. Bugg, Y. Otani, and E. L. Hart

Subjects
Physics, Particle physics, Antiparticle, Meson, Branching fraction, Nuclear Theory, Hadron, Elementary particle, Omega, Particle decay, Antimatter, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment
Abstract

From a study of 8-GeV/c ..pi../sup -/p interactions, the various two-pion and four-pion decay channels available to the g/sup -/ meson have been investigated. Our results indicate that the dominant 4..pi.. decay modes involve intermediate rho and ..omega.. production without significant A/sub 2/ formation.

Published
1982
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7. Measurement of the Branching Fraction of the Decayϒ(1S)→τ+τ−

Author

P. Skubic, A. Snyder, T. Gentile, N. B. Mistry, Joan A. Guida, J. Kandaswamy, L. Garren, F. Morrow, Ron Poling, J. Chauveau, E. Nordberg, M. Jibaly, E. H. Thorndike, Robert Stone, H. Van Hecke, V. Kistiakowsky, R. Galik, S. Holzner, S. Behrends, J. W. Dewire, Richard Wilson, F. M. Pipkin, D. L. Kreinick, R. Ehrlich, M. Hempstead, M. Halling, P. Lipari, H. Kagan, A. Chen, P. Avery, D. Peterson, F. Sannes, M. S. Alam, G. Rucinski, A. J. Sadoff, D. Weber, C. Bebek, G. Parkhurst, C. Rosenfeld, J. Hassard, A. Silverman, M. Ogg, R. G. Hicks, R. D. Kass, Joseph Izen, R. T. Giles, K. Chadwick, R. S. Panvini, T. Ferguson, A. Jawahery, R. Perchonok, C. G. Trahern, S. L. Olsen, Sheldon Stone, R. Plunkett, P. C. Stein, S. E. Csorna, K. Kinoshita, A. C. Melissinos, D. Herrup, D. Andrews, D. G. Cassel, M. D. Mestayer, M. Ito, M. Goldberg, D. L. Hartill, James C. Green, J. Rohlf, W. W. MacKay, P. Ganci, G. C. Moneti, Jan M. Guida, Y. Kubota, R. Wilcke, Murdock Gilchriese, B. Gittelman, Karl Berkelman, and N. Horwitz

Subjects
Physics, Particle physics, Muon, Meson, Branching fraction, Hadron, General Physics and Astronomy, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Fermion, Particle decay, High Energy Physics::Experiment, Astrophysics::Galaxy Astrophysics, Lepton
Abstract

The branching fraction for the decay of the UPSILON(1S) into tau pairs has been measured to be 3.4 +- 0.4 +- 0.4%. This result agrees with the previously measured branching ratio of the decay into muon pairs.

Published
1983
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8. The reactionspp→ppπ+π-,K + p→K + pπ +π−π, π+ p→ π+,pπ+π− and π− p →π+π− at 147 GeV/c

Author

P. E. Stamer, Sergio P Ratti, A. M. Shapiro, Fernand Grard, H. O. Cohn, V. Kistiakowsky, Shlomo Dado, C. Castoldi, Yong-Shi Wu, S. H. Oh, H. de Bock, G. Bressi, E. D. AlyeaJr., L. Bachman, P. Lucas, E. S. Hafen, C. Pols, V. Henri, L. Berny, W. J. Metzger, D. Huang, R. T. Van de Walle, R. Windmolders, P. C. Trepagnier, D. H. Brick, T. B. Stoughton, P. Lutz, R. Yaari, B. M. Whyman, P. Herquet, Gideon Alexander, P.F. Jacques, A. Shapira, S. Noguchi, H. A. Rubin, T. L. Watts, J. Goldberg, J. T. Bober, E. B. Brucker, M. Widgoff, J. Grunhaus, Richard E. Ansorge, R. Dimarco, E. Calligarich, V. Suchorebrow, M. Kalelkar, F. Crijns, Aharon Levy, S. Taylor, A. H. Rogers, S. Toaff, E.E. Ronat, R. K. Yamamoto, R. Steiner, D. Hochman, R. I. Hulsizer, Odette Benary, C. Y. Chien, H. Rudnicka, T. Ludlam, E. L. Hart, D. R. Ward, J. Hanton, I. A. Pless, S. Tether, R.A. Burnstein, M. Schouten, A. Pevsner, R. Dolfini, E. L. Koller, R. Heifetz, P. Haridas, Y. Eisenberg, W. M. Bugg, T. Handler, G. T. Condo, W. Kittel, P. Pilette, U. Karshon, G. Yekutieli, H. D. Taft, R.J. Plano, J. M. Lesceux, W.W. Neale, and T. A. J. Frank

Subjects
Nuclear physics, Mass enhancement, Physics, Diffraction, Pomeron, Physics and Astronomy (miscellaneous), Elementary particle, Fermilab, Atomic physics, Engineering (miscellaneous)
Abstract

We have studied the reactionspp→ppπ+π-,K+p→K+pπ+π−π, π+p→ π+,pπ+π− and π−p →π+π− at 147 GeV/c using the 30-inch Fermilab hybrid system. All four reactions were detected with the same apparatus and analyzed in the same way. The energy dependence of the channel cross section was found to beAp−0.6+B for thepp reaction andAp−1+B for the other three. About 90% of the cross section at 147 GeV/c can be accounted for by either beam or target diffraction. Some of the remaining cross section may come from double Pomeron exchange reactions which we tried to isolate. We have tested the hypothesis of a factorizable Pomeron and our data indicates a violation of this hypothesis. We show that the 3π mass enhancement in the mass region 1.2–1.4 GeV is diffractively produced in the π± beam reactions. Fourprong, four-constraint and six-prong, four-constraint cross sections are reported.

Published
1983
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9. Inclusive strange-resonance production inpp,π+p, andK+pinteractions at 147 GeV/c

Author

Sergio P Ratti, G. Yekutieli, Fernand Grard, E.D. Alyea, T. L. Watts, H. D. Taft, V. Kistiakowsky, Shlomo Dado, J. W. Cooper, Aharon Levy, G. T. Condo, H. O. Cohn, A. Pevsner, P. C. Trepagnier, F. Carminati, J. Grunhaus, P.F. Jacques, E.E. Ronat, R. Dimarco, D. H. Brick, E. B. Brucker, Y. Eisenberg, R.J. Plano, R. Windmolders, W. Kittel, C. Castoldi, B. M. Whyman, W. M. Bugg, P. E. Stamer, D. Hochman, W. J. Metzger, T. Handler, U. Karshon, P. Lutz, M. Schouten, Gideon Alexander, H. A. Rubin, M. Kalelkar, A. M. Shapiro, M. Widgoff, W.W. Neale, Richard E. Ansorge, L. Berny, R. T. Van de Walle, Odette Benary, E. L. Koller, R.A. Burnstein, F. Crijns, R. Yaari, E. L. Hart, A. Shapira, A. Napier, S. Taylor, D. R. Ward, C. Y. Chien, H. Rudnicka, G. Bressi, J. P. Silverman, T. Ludlam, E. S. Hafen, S. Toaff, J. Goldberg, J. E. Brau, E. Calligarich, J. Hanton, R. Dolfini, V. Henri, L. Bachman, I. A. Pless, C. Pols, R. K. Yamamoto, R.D. Sard, H. Debock, J. R. Carter, R. I. Hulsizer, John Gordon Rushbrooke, J. Tortora, D. Ljung, J. M. Lesceux, R. L. Plumer, and P. Herquet

Subjects
Physics, Nuclear physics, Quark model, Pi, Fermilab, Hydrogen bubble, Lambda, Central region
Abstract

We have studied the inclusive production of K/sup asteriskplus-or-minus/(890) and Y/sup asteriskplus-or-minus/(1385) in pp, ..pi../sup +/p, and K/sup +/p interactions at 147 GeV/c. The experiment used the Fermilab 30-inch hydrogen bubble chamber with the hybrid spectrometer system. Results are based on a sample of 1916 observed K/sub S/ and 932 observed ..lambda... Inclusive cross sections are given for K/sup asteriskplus-or-minus/ and Y/sup asteriskplus-or-minus/ production from the three beams, and comparisons are made with experiments at other energies. Feynman-x and transverse-momentum-squared distributions are also calculated. The results suggest that the K/sup asterisk-/ is entirely produced in the central region, while the K/sup asterisk+/ includes a component from beam fragmentation. Comparisons are made with the additive quark model.

Published
1982
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10. The performance of crisis and its calibration

Author

O. E. Murphy, V. Kistiakowsky, T. B. Stoughton, I. A. Pless, D. Goloskie, B.F. Wadsworth, H. D. Taft, R. V. Steiner, S. H. Oh, and V. Suchorebrow

Subjects
Physics, Nuclear physics, Momentum, Nuclear and High Energy Physics, Wire chamber, Spectrometer, Calibration, High Energy Physics::Experiment, Fermilab, Instrumentation, Particle identification, Particle detector, Charged particle
Abstract

We describe the calibration of CRISIS, a charge sensitive drift chamber which makes possible the identification of charged particles with momentum between 5 and 100 GeV/ c . Results indicate an optimum resolution of (7.1 ± 0.2)% fwhm, which is an improvement over the predicted value of 7.8%. We characterize the efficiency for particle identification by the ratio b = (separation between π and p)/( σ π + σ p . We achieve a value of (0.94 ± 0.02), which compares favorably with the theoretical value of 0.87 at 200 GeV. In addition to particle identification, the data from this detector will augment the other components of the Fermilab hybrid spectrometer to reconstruct particle trajectories in real space.

Published
1985
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11. Inclusive study of off-mass-shellπ±pandπ±π−interactions

Author

J. B. McManus, E. S. Hafen, P. C. Trepagnier, I. A. Pless, O. Benary, J. P. Silverman, V. Kistiakowsky, R. I. Hulsizer, R. K. Yamamoto, Fernando Barreiro, A. Napier, and J. Wolfson

Subjects
Elastic scattering, Physics, Particle physics, Pion, Nuclear Theory, Shell (structure), Resonance, Production (computer science), Nuclear Experiment, Energy (signal processing)
Abstract

We have studied inclusive ${\ensuremath{\rho}}^{0}$ and ${\ensuremath{\Delta}}^{++}$ production in ${\ensuremath{\pi}}^{+}p$ and ${\ensuremath{\pi}}^{\ensuremath{-}}p$ interactions at 15 GeV/c in a region where pion exchange has been found to dominate the resonance production. By using ${\ensuremath{\rho}}^{0}$ production, the off-mass-shell interactions of virtual pions with the target protons have been studied and compared with the same on-shell reactions at comparable energy. No significant differences between on-shell and off-shell reactions have been found in topological-cross-section ratios, inclusive longitudinal- or transverse-momentum distributions, or elastic $\frac{d\ensuremath{\sigma}}{\mathrm{dt}}$ distributions. The effect of the negative mass squared of the virtual pions has also been studied. Inclusive ${\ensuremath{\Delta}}^{++}$ production has been found to be dominated by pion exchange for $|t|\ensuremath{\lesssim}0.4$ (${\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$. We have studied the interactions of these off-shell pions with the beam pions as a function of energy. The ratio $\frac{{\ensuremath{\sigma}}_{\mathrm{el}}}{{\ensuremath{\sigma}}_{T}}$ and the average charged-particle multiplicities $〈{n}_{X}〉$ have been examined and compared with those for various hadron-proton reactions. The values of $〈{n}_{X}〉$ have also been studied in terms of a simple model and found to give results consistent with studies at higher energies. We also present longitudinal- and transverse-momentum distributions for produced pions, as well as $\frac{d\ensuremath{\sigma}}{\mathrm{dt}}$ distributions for $\ensuremath{\pi}\ensuremath{\pi}$ elastic scattering.

Published
1981
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12. Hadron production inπ +,K + p andpp collisions at 147 GeV/c and properties of jet-like multiparticle systems

Author

T. A. J. Frank, G. T. Condo, M. Widgoff, F. Crijns, Richard E. Ansorge, E. Calligarich, P. Pilette, W. Kittel, J. T. Bober, R.A. Burnstein, S. Taylor, E. L. Koller, P. Haridas, H. Rudnicka, L. Bachman, S. Ratti, W. J. Metzger, E. L. Hart, Odette Benary, D. Huang, D. R. Ward, J. Goldberg, Y. Eisenberg, R. Windmolders, A. Pevsner, H. de Bock, S. H. Oh, J. M. Lesccux, W. M. Bugg, C. Pols, L. Berny, Aharon Levy, T. B. Stoughton, R. T. Van de Walle, V. Suchorebrow, M. Kalelkar, D. H. Brick, Fernand Grard, S. Toaff, T. Handler, S. Tether, P.F. Jacques, R. Heifetz, D. Hochman, P. Lucas, P. Lutz, G. Yekutieli, A. H. Rogers, Yong-Shi Wu, M. Elahy, E.D. Alyea, R. Steiner, M. Schouten, R.J. Plano, W.W. Neale, R. K. Yamamoto, H. D. Taft, H. O. Cohn, E. B. Brucker, Gideon Alexander, H. A. Rubin, E.E. Ronat, J. Hanton, P. E. Stamer, I. A. Pless, U. Karshon, R. I. Hulsizer, R. Yaari, V. Kistiakowsky, Shlomo Dado, A. M. Shapiro, A. Shapira, T. L. Watts, P. C. Trepagnier, C. Y. Chien, T. Ludlam, R. Di Marco, P. Herquet, G. Bressi, E. S. Hafen, R. Dolfini, V. Henri, C. Castoldi, and J. Grunhaus

Subjects
Nuclear physics, Momentum, Physics, Jet (fluid), Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Hadron, Production (computer science), Coplanarity, Tensor, Engineering (miscellaneous)
Abstract

The gross features of the data are reviewed and the momentum tensor components, 〈S〉, and 〈T〉 are studied. Evidence for coplanarity effects is observed. A probabilistic method to search for jets is proposed. The jets found by this method are seen to be similar to highp T jets frompp interactionse + e − annihilations andvp interactions. The effect of subtracting the leading particles and the effect of lowp T diffractive and non diffractive components are investigated.

Published
1982
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13. Peripherality and exchange mechanisms of four-body final states induced byπ+pandp¯pinteractions

Author

I. A. Pless, D.B. Bastien, P. L. Bastien, R. K. Yamamoto, B. Haber, L.D. Kirkpatrick, V. Kistiakowsky, Henry Lubatti, J. Wolfson, M.F. Hodous, R. I. Hulsizer, and R.A. Singer

Subjects
Baryon, Physics, Annihilation, Proton, Meson, Phase space, Production (computer science), State (functional analysis), Atomic physics, Resonance (particle physics)
Abstract

We define a kinematical variable ${P}_{v}$ which is correlated to the peripherality of a multibody final state. ${P}_{v}=0$ implies that all the final-state particles lie in a plane perpendicular to the incident direction. ${P}_{v}=1$ implies that all the particles in the final state are collinear with the incident direction. ${P}_{v}$ distributions for resonance production are quite different from those for Lorentz-invariant phase space. This property may be used to detect phase-space-like phenomena at high energies in multibody final states ($n\ensuremath{\ge}10$). We compare ${P}_{v}$ distributions for the four-body annihilation and nonannihilation channels of $\overline{p}p$ interactions and the four-body final states of ${\ensuremath{\pi}}^{+}p$ interactions in which the proton goes into the backward and forward hemispheres. We find remarkable kinematic similarities between annihilation and ${\ensuremath{\pi}}^{+}p$ backward-hemisphere channels. We suggest that this is due to the dominance of baryon exchange. There is also a remarkable, but different, similarity between nonannihilation and the ${\ensuremath{\pi}}^{+}p$ forward-hemisphere channels. We suggest that this is due to the dominance of meson exchange.

Published
1974
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14. Topological, total, and elastic cross sections forK+p,π+p, andppinteractions at 147 GeV/c

Author

S. Toaff, W. J. Metzger, P. Lutz, Y. Eisenberg, R.A. Burnstein, J. Hanton, P. C. Trepagnier, S. H. Oh, W. M. Bugg, R. Dolfini, E. Hafen, T. B. Stoughton, V. Suchorebrow, B. M. Whyman, T. L. Watts, M. Kalelkar, I. A. Pless, J. Grunhaus, W. Kittel, D. H. Brick, A. Pevsner, V. Kistiakowsky, S. Noguchi, Yang Wu, V. Henri, Shlomo Dado, E. B. Brucker, T. Handler, R. Dimarco, R. Steiner, J. T. Bober, G. Bressi, Sergio P Ratti, Odette Benary, G. Yekutieli, F. Crijns, E.D. Alyea, R. Heifetz, P. Herquet, Fernand Grard, S. Taylor, R. I. Hulsizer, U. Karshon, W.W. Neale, E. L. Koller, H. D. Taft, P. W. Lucas, G. T. Condo, S. Tether, P. Haridas, H. Rudnicka, P. Pilette, R. K. Yamamoto, R. Yaari, C. Y. Chien, A. Shapira, A. H. Rogers, T. Ludlam, C. Castoldi, R.J. Plano, L. Berny, R. T. Van de Walle, M. Schouten, J. Goldberg, P.F. Jacques, E.E. Ronat, E. Calligarich, R. Windmolders, E. L. Hart, D. R. Ward, H. O. Cohn, P. E. Stamer, A. M. Shapiro, D. Hochman, D. Huang, T. A. J. Frank, M. Widgoff, Richard E. Ansorge, Gideon Alexander, H. A. Rubin, Aharon Levy, J. M. Lesceux, L. Bachman, C. Pols, and H. Debock

Subjects
Physics, Nuclear physics, Elastic scattering, Pi, Analytical chemistry, Particle detector, Beam (structure)
Abstract

The Fermilab hybrid 30-in. bubble-chamber spectrometer was exposed to a tagged 147-GeV/c positive beam containing ..pi../sup +/, K/sup +/, and p. A sample of 3003 K/sup +/p, 19 410 pp, and 20 745 ..pi../sup +/p interactions is used to derive sigma/sub n/, , f/sub 2//sup tsc/c, and /D for each beam particle. These values are compared to values obtained at other, mostly lower, beam momenta. The overall dependence of on E/sub a/, the available center-of-mass energy, for these three reactions as well as ..pi../sup -/p and pp interactions has been determined.

Published
1982
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15. Neutral-particle production inπ−pinteractions at 147 GeV/cand comparison to charged-particle production

Author

V. Kistiakowsky, Marvin Johnson, R.J. Plano, T.C. Ou, R. A. Burnstein, M. Robertson, P. W. Lucas, Fernando Barreiro, E. L. Hart, I. A. Pless, U. Karshon, D. H. Brick, J. E. Brau, C. Y. Chien, P. E. Stamer, H. O. Cohn, H. A. Rubin, D. Fong, E. L. Koller, P. C. Trepagnier, J. P. Silverman, T. Ludlam, J. Tortora, D. Bogert, F. Bruyant, P.F. Jacques, D. Ljung, M. Widgoff, A. Pevsner, A. M. Shapiro, J. Wolfson, Odette Benary, R. D. Sard, R. K. Yamamoto, S. Taylor, Aharon Levy, D. Petersen, J. Grunhaus, M. Heller, A. Snyder, R. I. Hulsizer, C. Fu, R. Zdanis, W. M. Bugg, T. Handler, G. T. Condo, E.D. Alyea, H. Kraybill, H. D. Taft, E. B. Brucker, A. Napier, E. S. Hafen, and T. L. Watts

Subjects
Nuclear physics, Physics, Neutral particle, Charged particle
Published
1979
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16. Ruling out exotic models of b quark decay

Author

A. Jawahery, Robert Stone, E. H. Thorndike, F. M. Pipkin, W. W. MacKay, M. Herzlinger, K. Chadwick, P. Ganci, C. Rosenfeld, A. Fridman, R. Wilcke, Murdock Gilchriese, J. Chauveau, T. Ferguson, G. Rucinski, D. G. Cassel, Harris Kagan, H. Van Hecke, J. Haggerty, G. Parkhurst, H. Kooy, A. Chen, G. C. Moneti, Ron Poling, P. Avery, F. Sannes, S. L. Olsen, Joseph Izen, B. Gittelman, P. Lipari, Karl Berkelman, R. Plunkett, S. Holzner, M. Ogg, R. Ehrlich, N. Horwitz, M. S. Alam, T. Gentile, D. Weber, M. Hempstead, M. Ito, R. S. Panvini, Richard Wilson, J. Rohlf, D. Herrup, J. Hassard, A. Silverman, R. G. Hicks, M. Goldberg, V. Kistiakowsky, F. Morrow, R. S. Galik, D. L. Kreinick, A. J. Sadoff, Y. Kubota, R. Perchonok, J. W. Dewire, Joan A. Guida, J. Kandaswamy, N. B. Mistry, A. Snyder, P. Skubic, P. C. Stein, S. E. Csorna, Sheldon Stone, R. D. Kass, E. Nordberg, M. Jibaly, D. L. Hartill, M. D. Mestayer, James C. Green, C. J. Bebek, A. C. Melissinos, and D. Andrews

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Muon, Energy Fraction, High Energy Physics::Phenomenology, Higgs boson, High Energy Physics::Experiment, Electron, Bottom quark, Lepton
Abstract

We consider three broad classes of nonstandard models for b quark decay: (1) b → llq with charged or neutral leptons of arbitrary flavor; (2) b → l q q ; and (3) b → qa − where a − is a Higgs boson or hyperpion. For these classes of models we have calculated the charged energy fraction and the inclusive yields of electrons, muons, protons, and lambdas. We demonstrate that these model predictions are inconsistent with CLEO measurements at the γ (4S).

Published
1983
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17. Measurement of the Leptonic Branching Ratios of theϒ(1S),ϒ(2S), andϒ(3S)

Author

G. C. Moneti, D. Andrews, D. G. Cassel, Karl Berkelman, Sheldon Stone, N. B. Mistry, J. W. Dewire, S. Holzner, S. Behrends, M. D. Mestayer, C. J. Bebek, Y. Kubota, G. Parkhurst, E. H. Thorndike, M. Ogg, R. S. Panvini, K. Chadwick, W. W. MacKay, P. Ganci, F. M. Pipkin, A. Fridman, D. L. Kreinick, Jan M. Guida, Richard Wilson, J. Chauveau, Joan A. Guida, J. Kandaswamy, Ron Poling, T. Gentile, M. Halling, P. Lipari, L. Garren, F. Morrow, R. Wilcke, R. Plunkett, R. Ehrlich, D. Peterson, Robert Stone, R. Galik, M. Ito, Murdock Gilchriese, A. Snyder, B. Gittelman, R. T. Giles, N. Horwitz, M. Goldberg, M. S. Alam, R. D. Kass, C. Rosenfeld, M. Hempstead, D. Weber, T. Ferguson, D. L. Hartill, V. Kistiakowsky, A. Chen, R. Perchonok, C. G. Trahern, S. L. Olsen, G. Rucinski, F. Sannes, J. Hassard, A. Silverman, P. C. Stein, S. E. Csorna, A. Jawahery, D. Herrup, H. Kagan, J. Rohlf, James C. Green, P. Avery, K. Kinoshita, A. J. Sadoff, Joseph Izen, R. G. Hicks, A. C. Melissinos, E. Nordberg, M. Jibaly, H. Van Hecke, and P. Skubic

Subjects
Nuclear physics, Physics, Particle physics, Particle decay, Muon, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Cornell Electron Storage Ring, Lepton
Abstract

Using the CLEO detector at the Cornell Electron Storage Ring, the authors have measured the leptonic branching fraction, B/sub mumu/, of the UPSILON(1S), UPSILON(2S), and UPSILON(3S) to be 2.7 +- 0.3 +- 0.3%, 1.9 +- 1.3 +- 0.5%, and 3.3 +- 1.3 +- 0.7%, respectively. Combining these values of B/sub mumu/ with previous measurements of the leptonic widths of these resonances, the authors find the total width of the UPSILON(1S), UPSILON(2S), and UPSILON(3S) to be 48 +- 4 +- 4, 27 +- 17 +- 6, and 13 +- 4 +- 3 keV.

Published
1983
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18. Inclusive and semi-inclusive ?0 production in ?+/??/K +/pp interactions at 147 GeV/c

Author

E. L. Koller, P. Haridas, H. Rudnicka, R. Windmolders, A. Pevsner, Z. Dziembowski, E. L. Hart, R. Dolfini, L. Berny, F. Crijns, T. A. J. Frank, R. T. Van de Walle, V. Henri, D. R. Ward, R.J. Plano, R. Heifetz, D. H. Brick, S. Taylor, D. Huang, H. O. Cohn, J. Goldberg, P.F. Jacques, G. Bressi, G. T. Condo, R.A. Burnstein, R. Yaari, W. J. Metzger, E. S. Hafen, J. Hanton, P. E. Stamer, A. Shapira, W. Kittel, S. Toaff, T. L. Watts, S. H. Oh, A. M. Shapiro, I. A. Pless, Sergio P Ratti, E.E. Ronat, Aharon Levy, Fernand Grard, P. Pilette, P. Lucas, R. J. Hulsizer, Odette Benary, J. M. Lesceux, W.W. Neale, V. Suchorebrow, M. Kalelkar, S. Tether, R. Steiner, J. Grunhaus, R. Dimarco, M. Schouten, C. Castoldi, P. Herquet, A. H. Rogers, B. M. Whyman, P. Lutz, G. Yekutieli, J. T. Bober, H. D. Taft, Y. Eisenberg, R. K. Yamamoto, E. B. Brucker, W. M. Bugg, T. Handler, C. Y. Chien, T. Ludlam, Yong-Shi Wu, T. B. Stoughton, E. D. AlyeaJr., L. Bachman, C. Pols, Gideon Alexander, H. de Bock, H. A. Rubin, M. Widgoff, Richard E. Ansorge, U. Karshon, V. Kistiakowsky, Shlomo Dado, E. Calligarich, and P. C. Trepagnier

Subjects
Quark, Density matrix, Physics, Particle physics, Valence (chemistry), Physics and Astronomy (miscellaneous), Meson, Nuclear physics, symbols.namesake, Pion, symbols, Feynman diagram, Fermilab, Nuclear Experiment, Engineering (miscellaneous), Scaling
Abstract

In an experiment with the 30-inch Hybrid Spectrometer at Fermilab we have obtained the inclusive and semi-inclusive production cross sections of the ϱ0 meson using a conventional background subtraction technique. Production cross sections for the ϱ0 are derived as a function of the Feynman scaling variablex, and the transverse variablespt2 andEt=(pt2+M2)1/2. The longitudinal distributions are compared with the (1−x) dependence of the proton and meson valence quark structure functions, using various forms of recombination and fragmentation models. The transverse distributions are compared with thermodynamic models. We give density matrix elements for the ϱ0 production from pions in the extreme forward region.

Published
1981
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19. Approach to scaling in inclusive π+/π− ratios at 147 GeV/c

Author

A. Pevsner, R. Dolfini, G. Bressi, R. Heifetz, C. Y. Chien, J. Hanton, E. S. Hafen, Yong-Shi Wu, T. Ludlam, P. C. Trepagnier, M. Schouten, T. L. Watts, R.J. Plano, R.A. Burnstein, P. Lutz, I. A. Pless, J. Grunhaus, U. Karshon, G. T. Condo, V. Suchorebrow, M. Kalelkar, V. Kistiakowsky, Shlomo Dado, S. H. Oh, R. Dimarco, H. de Bock, F. Crijns, D. H. Brick, S. Tether, E. L. Koller, A. H. Rogers, W. Kittel, S. Taylor, B. M. Whyman, E. B. Brucker, P. Haridas, P. Pilette, S. Toaff, Sergio P Ratti, J. T. Bober, R. Steiner, R. Yaari, Fernand Grard, P. Herquet, A. Shapira, E.E. Ronat, G. Yekutieli, V. Henri, C. Castoldi, E.D. Alyea, W. J. Metzger, H. D. Taft, T. B. Stoughton, Y. Eisenberg, W. M. Bugg, R. K. Yamamoto, T. Handler, Odette Benary, L. Berny, R. T. Van de Walle, J. Goldberg, P.F. Jacques, R. I. Hulsizer, E. Calligarich, H. O. Cohn, R. Windmolders, P. Lucas, D. Hochman, H. Rudnicka, E. L. Hart, D. R. Ward, J. M. Lesceux, W.W. Neale, Gideon Alexander, H. A. Rubin, Aharon Levy, T. A. J. Frank, M. Widgoff, Richard E. Ansorge, P. E. Stamer, A. M. Shapiro, D. Huang, L. Bachman, and C. Pols

Subjects
Diffraction, Quark, Physics, Valence (chemistry), Physics and Astronomy (miscellaneous), Fragmentation (mass spectrometry), Hadron, Atomic physics, Nuclear Experiment, Engineering (miscellaneous), Scaling, Dissociation (chemistry), Beam (structure)
Abstract

The ratio of hadronic π+/π− production has been studied in the target fragmentation region of π+ p, π− p,K + p andp p collisions at 147 GeV/c beam momentum. The difference between this ratio in the π+ p and π− p data is less than at lower energies but still present. No difference exists anymore for the π+/π− ratio at this energy betweenK + p andpp collisions. Exclusion of diffraction dissociation and resonance production does not change the main conclusions. The energy dependence of the ratio for π+ p and π− p collisions gives evidence for a universal asymptotic ratio for all beams. Thep t -dependence at low-p t is in agreement with the expectation from geometrical correlation of the valence quarks.

Published
1982
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21. Production of Charmed Mesons ine+e−Annihilation at 10.5 GeV

Author

H. Kagan, M. D. Mestayer, Jan M. Guida, S. L. Olsen, D. Weber, Robert Stone, James C. Green, R. Plunkett, J. Hassard, A. Silverman, A. J. Sadoff, E. H. Thorndike, Richard Wilson, F. M. Pipkin, Xia Yi, A. C. Melissinos, J. Chauveau, H. Van Hecke, F. Morrow, P. Avery, T. Jensen, Karl Berkelman, W. W. MacKay, P. Ganci, M. Halling, D. L. Hartill, Ron Poling, Joan A. Guida, G. Rucinski, N. Horwitz, Y. Kubota, Sheldon Stone, R. S. Galik, R. S. Panvini, P. Lipari, D. Peterson, V. Kistiakowsky, C. G. Trahern, A. Jawahery, J. Kandaswamy, D. G. Cassel, E. Nordberg, M. S. Alam, M. Goldberg, G. C. Moneti, A. Chen, F. Sannes, J. W. Dewire, D. L. Kreinick, M. Hempstead, R. Wilcke, Murdock Gilchriese, Paul Tipton, R. Perchonok, B. Gittelman, C. Rosenfeld, M. Ito, A. Snyder, P. C. Stein, S. E. Csorna, R. T. Giles, P. Skubic, K. Kinoshita, R. D. Kass, T. Gentile, M. Ogg, L. Garren, R. Ehrlich, N. B. Mistry, R. G. Hicks, C. Bebek, G. Parkhurst, K. Chadwick, T. Ferguson, D. Herrup, S. Holzner, and S. Behrends

Subjects
Quark, Physics, Particle physics, Annihilation, Meson, Electron–positron annihilation, Nuclear Theory, High Energy Physics::Phenomenology, General Physics and Astronomy, Resonance (particle physics), Nuclear physics, Momentum, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, Energy (signal processing)
Abstract

A measurement is presented of the inclusive production of charged ${D}^{*}$ and neutral $D$ mesons from nonresonant ${e}^{+}{e}^{\ensuremath{-}}$ annihilation in the energy region near the $\ensuremath{\Upsilon}(4S)$ resonance. The momentum distribution shows a large contribution at high momenta as expected for heavy quark production. Comparison of the spectrum with several phenomenological models is made. The relative yields of the ${D}^{*}$ and $D$ mesons indicate that the charm cross section is dominated by the ${D}^{*}$ contribution.

Published
1983
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22. Study of three quasi-two-body channels fromπ+pinteractions at 3.9 GeV/c

Author

I. A. Pless, V. Kistiakowsky, B. Haber, R.A. Singer, A. Levy, R. I. Hulsizer, J. Wolfson, M.F. Hodous, and R. K. Yamamoto

Subjects
Physics, Particle physics, Crystallography, Angular distribution, Absorption (logic), Spin density
Abstract

The $p{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}$ and $p{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ final states from ${\ensuremath{\pi}}^{+}p$ interactions at 3.9 GeV/c have been analyzed by the prism-plot technique and the following three quasi-two-body channels have been studied in detail: ${\ensuremath{\pi}}^{+}p\ensuremath{\rightarrow}{\ensuremath{\rho}}^{+}p$, ${\ensuremath{\pi}}^{+}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\Delta}}^{++}$, and ${\ensuremath{\pi}}^{+}p\ensuremath{\rightarrow}{\ensuremath{\rho}}^{0}{\ensuremath{\Delta}}^{++}$. Results are presented on cross sections, differential cross sections, and single and joint spin density matrix elements. These are compared with the Dar-Watts-Weisskopf absorption model and Reggeized pion-exchange model predictions. Relations among joint spin density matrix elements for ${\ensuremath{\rho}}^{0}{\ensuremath{\Delta}}^{++}$ are compared with quark-model predictions.

Published
1975
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23. Inclusive and semi-inclusive ϱ0 production in π−p interactions at 15 GeV/c

Author

I. A. Pless, J. Grunhaus, R. I. Hulsizer, P. C. Trepagnier, P.A. Miller, E. S. Hafen, V. Kistiakowsky, A. Levy, D.H. Brick, U. Karshon, A. Nakkasyan, R. K. Yamamoto, J. Wolfson, M.F. Hodous, and J. Brau

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Pion, Rapidity, Central region
Abstract

We have done an inclusive study of ϱ0 production in π−p interactions at 15 GeV/c. Evidence for two different production mechanisms, in addition to the known quasi two-body processes, is presented: production of ϱ0's in the central region of rapidity similar to the “pionization” region seen in the inclusive studies of pions; and forward production in the beam dissociation region of rapidity. Cross sections and rapidity distributions for the ϱ0 are given inclusively and by topology, and the results are compared with similar studies at other energies and with other incident particles. Results are also presented for the semi-inclusive reaction π−p → pϱ0 + X− and the exclusive final state pπ−ϱ0.

Published
1975
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24. The Crisis Detector

Author

Satish Dhawan, B.F. Wadsworth, W. M. Bugg, V. Kistiakowsky, G. Koizumi, Fernando Barreiro, E. D. Alyea, R.J. Plano, J. Albright, R.A. Burnstein, A. M. Shapiro, J. B. McManus, R. K. Yamamoto, T. Ludlam, T. L. Watts, T. B. Stoughton, and D. Goloskie

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Nuclear Energy and Engineering, Ionization, Detector, Measuring instrument, Fermilab, Electrical and Electronic Engineering, Particle detector, Beam (structure), Particle identification, Charged particle
Abstract

The prototype of a charged particle identifier with 1m x 1m acceptance, has been tested at Fermilab using a pion-proton beam at 40 and 100 GeV/c. Its operation is based on the principle of ionization sampling, and the test results indicate that the prototype achieved the 14% FWHM resolution predicted for the distribution of average ionization for 64 samples taken in an 80% Ar -20% CO2 gas mixture. Dependence of the performance on various parameters is discussed.

Published
1979
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25. Observation of Exclusive Decay Modes ofb-Flavored Mesons

Author

Ron Poling, E. H. Thorndike, F. M. Pipkin, Y. Kubota, V. Kistiakowsky, M. Hempstead, D. Herrup, D. L. Kreinick, J. Rohlf, C. Rosenfeld, Karl Berkelman, D. G. Cassel, J. Chauveau, A. Snyder, M. S. Alam, M. Halling, R. G. Hicks, D. Weber, Richard Wilson, A. J. Sadoff, M. Ogg, R. Wilcke, Murdock Gilchriese, P. Lipari, S. L. Olsen, J. Hassard, A. Silverman, B. Gittelman, L. Garren, R. S. Panvini, D. Peterson, R. Plunkett, K. Chadwick, G. Rucinski, N. Horwitz, R. Galik, R. Perchonok, R. T. Giles, R. Ehrlich, F. Morrow, A. Chen, J. W. Dewire, Jan M. Guida, F. Sannes, Joseph Izen, T. Ferguson, A. Jawahery, P. Avery, S. Holzner, S. Behrends, M. Ito, R. D. Kass, Joan A. Guida, J. Kandaswamy, A. C. Melissinos, D. Andrews, E. Nordberg, M. Jibaly, H. Van Hecke, P. Skubic, G. C. Moneti, Sheldon Stone, D. L. Hartill, N. B. Mistry, C. G. Trahern, James C. Green, P. C. Stein, S. E. Csorna, K. Kinoshita, M. D. Mestayer, Robert Stone, C. Bebek, G. Parkhurst, Harris Kagan, T. Gentile, W. W. MacKay, Richard Talman, P. Ganci, and M. Goldberg

Subjects
Nuclear physics, Physics, Particle decay, Particle physics, Pion, Meson, Electron–positron annihilation, Hadron, General Physics and Astronomy, Invariant mass, Elementary particle, Boson
Abstract

$B$-meson decays to final states consisting of a ${D}^{0}$ or ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ and one or two charged pions have been observed. The charged-$B$ mass is 5270.8 \ifmmode\pm\else\textpm\fi{} 2.3 \ifmmode\pm\else\textpm\fi{} 2.0 MeV and the neutral-$B$ mass is 5274.2 \ifmmode\pm\else\textpm\fi{} 1.9 \ifmmode\pm\else\textpm\fi{} 2.0 MeV.

Published
1983
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26. Topological and leading particle cross sections for 147 GeV/c π− -p interactions

Author

R. Zdanis, V. Kistiakowsky, M. Kenton, Aharon Levy, Marvin Johnson, W. Barletta, J. Grunhaus, G. T. Condo, R. A. Burnstein, D. Dauwe, T. Ludlam, T.C. Ou, P. E. Stamer, A. Napier, E.D. Alyea, H. Kraybill, A. M. Shapiro, J. Wolfson, E. S. Hafen, H. O. Cohn, D. Fong, H. D. Taft, W. M. Bugg, J. Tortora, D. Ljung, I. A. Pless, T. L. Watts, D. Petersen, C. Fu, E. B. Brucker, A. Pevsner, A. Snyder, E. L. Hart, F. Bruant, E. L. Koller, D. Bogert, M. Widgoff, U. Karshon, P. Lucas, R. K. Yamamoto, R.D. Sard, H. A. Rubin, R.J. Plano, R. I. Hulsizer, R.M. Robertson, M. Heller, S. Taylor, C.Y. Chien, and P. C. Trepagnier

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Meson, Physics::Instrumentation and Detectors, Hadron, Elementary particle, Inelastic scattering, Topology, Nuclear physics, Antimatter, Bubble chamber, High Energy Physics::Experiment, Nuclear cross section
Abstract

Results are reported based on a study of π − p interactions at 147 GeV/ c in the FERMILAB 30-inch Proportional Wire Hybrid Bubble Chamber System. We have measured the topological cross sections and separated two-prong elastic and inelastic channels. In addition, we have extracted leading particle cross sections using the increased momentum resolution of the downstream proportional wire chambers. We have compared our results with experiments and predictions of a simple fragmentation hyphothesis.

Published
1974
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27. Inclusive and semi-inclusive ϱ0 production in π−p interactions at 147 GeV/c

Author

M. Heller, E. B. Brucker, I. A. Pless, A. Levy, A. Pevsner, J. Brau, H. A. Rubin, R. I. Hulsizer, C. Fu, H. O. Cohn, S. Taylor, D. Fong, V. Kistiakowsky, R.J. Plano, R. K. Yamamoto, A. Snyder, P. Stamer, Marvin Johnson, P. Lucas, A. Napier, H. D. Taft, J. Grunhaus, R. D. Sard, J. Wolfson, T. L. Watts, M. Robertson, D. Alyea, D. Bogert, W. M. Bugg, M. Widgoff, A.M. Shapiro, R.A. Burnstein, R. Zdanis, P. C. Trepagnier, T. Handler, G. T. Condo, U. Karshon, D. Petersen, T.C. Ou, F. Bruyant, J. Tortora, C. Y. Chien, D. Ljung, T. Ludlam, E. S. Hafen, E. L. Koller, H. Kraybill, and E. L. Hart

Subjects
Nuclear physics, Scattering cross-section, Physics, Nuclear and High Energy Physics, Particle physics, Transverse momentum, Mass spectrum, Production (computer science), Rapidity
Abstract

We present data on inclusive and semi-inclusive ϱ 0 production in 147 GeV/ c π − p interactions. We find a total cross section of 7.3 ± 1.3 mb. Most of this cross section is found in the lower topology events (⩽ 10 prongs), and in the central and forward rapidity regions. The P T 2 dependence of ϱ 0 production, 〈: n > ϱ 0 per event, and the ϱ 0 / π + ratios are also discussed.

Published
1975
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28. Inclusive production of neutral strange particles by 147 GeV/cπ+/K+/p interactions in hydrogen

Author

S. Ratti, L. Berny, P. E. Stamer, R. T. Van de Walle, E.E. Ronat, G. T. Condo, J. Grunhaus, W. J. Metzger, A. M. Shapiro, G. Cecchet, D. H. Brick, V. Kistiakowsky, B. M. Whyman, Shlomo Dado, A. Napier, R.A. Burnstein, F. Crijns, Gideon Alexander, H. A. Rubin, P. Lutz, L. Bachman, C. Pols, H. Debock, T. L. Watts, A. Levy, S. Taylor, J. W. Cooper, M. Widgoff, A. Pevsner, J. M. Lesceux, W.W. Neale, P. Herquet, Y. Eisenberg, Richard E. Ansorge, E. B. Brucker, R. Windmolders, E. Calligarich, W. M. Bugg, R.J. Plano, D. Hochman, E. L. Hart, E. L. Koller, U. Karshon, C. Castoldi, G. Bressi, D. R. Ward, Fernand Grard, T. Handler, P. C. Trepagnier, John Gordon Rushbrooke, J. Tortora, D. Ljung, J. Goldberg, E. S. Hafen, S. Toaff, G. Yekutieli, Odette Benary, G. Liguori, E.D. Alyea, H. O. Cohn, V. Henri, M. Schouten, R. Yaari, H. D. Taft, A. Shapira, R. L. Plumer, C. Y. Chien, J. P. Silverman, T. Ludlam, M. Kalelkar, J. Brau, R. I. Hulsizer, J. Hanton, I. A. Pless, R. K. Yamamoto, R.D. Sard, J. R. Carter, P.F. Jacques, and R. Dolfini

Subjects
Physics, Nuclear and High Energy Physics, Strange quark, Spectrometer, Hydrogen, chemistry.chemical_element, Nuclear physics, symbols.namesake, chemistry, symbols, Feynman diagram, Rapidity, Fermilab, Multiplicity (chemistry), Scaling
Abstract

Results are presented from a study of inclusive neutral strange particle production by a 147 GeV/c tagged π+/K+/p beam in the Fermilab 30-inch hydrogen bubble chamber. The experiment made use of the proportional hybrid spectrometer system. Results are based on 995 KS0, 485 Λ, and 83 Λ found in a sample of 132 000 pictures. Cross sections are given for inclusive production of these particles by each of the three beam particles, and comparisons are made with measurements at other energies. Topological cross sections are also calculated, and KNO multiplicity scaling is investigated. Distributions are presented of invariant cross sections as functions of the Feynman scaling variable x and c.m. rapidity y. The transverse momentum-squared distributions with their fitted slopes are also given. Comparisons are made of the production characteristics for the three beam types.

Published
1980
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29. Performance of the SLD Warm Iron Calorimeter Pre-Prototype

Author

A. M. Johnson, R. de Sangro, H. R. Band, Roberto Battiston, L.S. Osborne, L. Piemontese, Piero Giorgio Verdini, M. Pauluzzi, M. Loreti, Giancarlo Mantovani, V. Kistiakowsky, Rino Castaldi, M. Piccolo, L. Rosenson, Henry W. Kendall, J.I. Friedman, A. Codino, Dario Bisello, G. Callegari, J. R. Johnson, L. Servoli, Wit Busza, P. Cenci, C. Vannini, R. Verdier, I. M. Peruzzi, Behcet Alpat, G. M. Bilei, and T. Lyons

Subjects
Physics, Nuclear and High Energy Physics, Muon, Calorimeter (particle physics), Physics::Instrumentation and Detectors, Hadron, Particle detector, Nuclear physics, Nuclear Energy and Engineering, Measuring instrument, Physics::Accelerator Physics, High Energy Physics::Experiment, Electrical and Electronic Engineering, Beam (structure), Crystal Ball, Lepton
Abstract

A prototype hadron calorimeter, of similar design to the Warm Iron Calorimeter (WIC) planned for the SLD experiment, has been built and its performance has been studied in a test beam. The WIC is an iron sampling calorimeter whose active elements are plastic streamer tubes similar to those used for the Mont-Blanc proton decay experiment. The construction and operation of the tubes will be briefly described together with their use in an iron calorimeter - muon tracker. Efficiency, resolution and linearity have been measured in a hadron/muon beam up to 11 GeV. The measured values correspond to the SLD design goals.

Published
1986
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30. Cross channel isospin amplitudes for 3.9 GeV/c π+-p → π(Nπ) compared with the predictions of a double exchange model

Author

V. Kistiakowsky, M.F. Hodous, R.A. Singer, R. K. Yamamoto, G. Berlad, B. Haber, R. I. Hulsizer, A. Levy, J. Wolfson, and I. A. Pless

Subjects
Scattering amplitude, Nuclear physics, Diffraction, Physics, Nuclear and High Energy Physics, Pomeron, Amplitude, Isospin, Invariant mass, Nucleon, Dissociation (chemistry)
Abstract

A cross-channel isospin analysis has been carried out on a prism plot separated sample of 3.9 GeV/c π+-p → π(Nπ) events. An enhancement is observed in the low (Nπ) invariant mass region for an I = 12 state of the Nπ system when the isospin for the cross channel is both IE = 0 and 1. These results and those of similar analyses at 8 and 16 GeV/c are compared with the predictions of a double-exchange model and good agreement is obtained. Neither interpretation of this phenomenon as a resonance nor as a consequence of diffraction dissociation in the usual definition, non-resonating single pomeron exchange, explains all the features of the results.

Published
1974
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31. Measurement of the Branching Ratio ofϒ(3S)→π+π−ϒ(1S)

Author

R. S. Panvini, E. H. Thorndike, G. Parkhurst, F. M. Pipkin, R. Cabenda, M. D. Mestayer, A. Snyder, N. Horwitz, C. J. Bebek, E. Nordberg, M. Jibaly, H. Van Hecke, C. Rosenfeld, V. Kistiakowsky, M. Ogg, P. Avery, Robert Stone, G. C. Moneti, M. S. Alam, P. Skubic, J. Chauveau, G. Rucinski, D. L. Kreinick, R. Galik, P. C. Stein, J. Kandaswamy, S. E. Csorna, F. Morrow, A. Chen, F. Sannes, R. Ehrlich, S. L. Olsen, D. Herrup, M. Ito, R. Perchonok, K. Chadwick, A. Fridman, H. Jawahery, T. Ferguson, N. B. Mistry, Ron Poling, Sheldon Stone, Richard Wilson, S. Holzner, R. D. Kass, Joseph Izen, R. G. Hicks, J. Rohlf, W. W. MacKay, P. Ganci, M. Hempstead, H. Kagan, J. W. Dewire, A. J. Sadoff, M. Goldberg, D. Weber, J. Hassard, A. Silverman, P. Lipari, R. Plunkett, D. G. Cassel, R. Wilcke, Murdock Gilchriese, B. Gittelman, Y. Kubota, T. Gentile, D. L. Hartill, James C. Green, A. C. Melissinos, and D. Andrews

Subjects
Physics, Particle decay, Pair production, Pion, Meson, Branching fraction, Electron–positron annihilation, Hadron, Mass spectrum, Analytical chemistry, General Physics and Astronomy
Abstract

The branching ratio of UPSILON(3S)..--> pi../sup +/..pi../sup -/UPSILON(1S) has been measured to be (4.9 +- 0.9 +- 0.5)%. The di-pion invariant-mass distribution for this decay is flatter than that for the decays UPSILON(2S)..--> pi../sup +/..pi../sup -/UPSILON(1S) and psi'..--> pi../sup +/..pi../sup -/psi.

Published
1982
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32. The effective-energy dependence of the charged particle's multiplicity in p/π+/K+ interactions on protons at 147 GeV/c

Author

L. Bachman, R. Yaari, A. Shapira, P.F. Jacques, Sergio P Ratti, Yong-Shi Wu, Fernand Grard, M. Schouten, E.E. Ronat, D. H. Brick, P. C. Trepagnier, E. Calligarich, M. Elahy, H. O. Cohn, R. I. Hulsizer, J. M. Lesceux, W.W. Neale, V. Kistiakowsky, L. Berny, W. J. Metzger, Shlomo Dado, R. T. Van de Walle, T. A. J. Frank, P. Lutz, R. Windmolders, U. Karshon, E. B. Brucker, R. K. Yamamoto, A. Pevsner, Odette Benary, R. Heifetz, J. Grunhaus, R. Dimarco, M. Widgoff, Richard E. Ansorge, D. Huang, T. L. Watts, C. Pols, H. Debock, J. Hanton, I. A. Pless, S. Toaff, R.A. Burnstein, Y. Eisenberg, R. Steiner, F. Crijns, W. M. Bugg, P. E. Stamer, R.J. Plano, S. Taylor, S. H. Oh, C. Castoldi, E. L. Koller, W. Kittel, Aharon Levy, J. Goldberg, A. M. Shapiro, P. Haridas, P. Lucas, S. Tether, P. Herquet, T. Handler, G. T. Condo, Gideon Alexander, H. A. Rubin, D. Hochman, P. Pilette, H. Rudnicka, V. Suchorebrow, M. Kalelkar, E. L. Hart, G. Yekutieli, D. R. Ward, E.D. Alyea, R. Dolfini, H. D. Taft, G. Bressi, V. Henri, A. H. Rogers, E. S. Hafen, T. B. Stoughton, B. M. Whyman, J. T. Bober, C. Y. Chien, and T. Ludlam

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Effective energy, Invariant mass, Multiplicity (chemistry), Total energy, Charged particle, Fermi Gamma-ray Space Telescope
Abstract

The energy dependence of the average of the charged multiplicity and its dispersion in π + /K + /p interaction on protons at 147 GeV/ c is found to be the same as in e + e − annihilations if an “effective energy” variable is used instead of the total energy. The effective energy S eff is defined as the invariant mass of all secondaries left after the two leading particles have been removed. Fitting the expression aS eff b to the average charge multiplicity 〈 n ch 〉, we find the power b to be in good agreement with the value of 0.25 predicted by Fermi's statistical model and by Landau's hydrodynamical model.

Published
1981
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33. Evidence for theFMeson at 1970 MeV

Author

J. Chauveau, C. Rosenfeld, Richard Wilson, Karl Berkelman, V. Kistiakowsky, Joan A. Guida, J. Kandaswamy, A. Jawahery, D. G. Cassel, R. S. Panvini, D. L. Hartill, D. L. Kreinick, E. Nordberg, H. Van Hecke, R. Wilcke, N. Horwitz, A. Chen, Murdock Gilchriese, F. Sannes, D. Weber, A. Snyder, P. Skubic, A. J. Sadoff, B. Gittelman, S. L. Olsen, James C. Green, T. Gentile, J. Hassard, A. Silverman, M. D. Mestayer, Xia Yi, R. Plunkett, Ron Poling, E. H. Thorndike, M. Ogg, F. M. Pipkin, P. Lipari, M. S. Alam, H. Halling, D. Peterson, D. Herrup, J. W. Dewire, Y. Kubota, L. Garren, Jan M. Guida, R. G. Hicks, R. Ehrlich, M. Hempstead, P. Avery, Paul Tipton, A. C. Melissinos, N. B. Mistry, R. Perchonok, K. Chadwick, C. G. Trahern, F. Morrow, P. C. Stein, S. E. Csorna, T. Ferguson, K. Kinoshita, R. T. Giles, R. Galik, Harris Kagan, G. C. Moneti, S. Holzner, S. Behrends, W. W. MacKay, R. D. Kass, P. Ganci, Sheldon Stone, M. Goldberg, C. Bebek, G. Parkhurst, M. Ito, Robert Stone, and G. Rucinski

Subjects
Physics, Particle physics, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Nuclear physics, Particle decay, Pion, High Energy Physics::Experiment, Continuum (set theory), Nuclear Experiment
Abstract

Evidence is presented for a narrow meson resonance of mass 1970\ifmmode\pm\else\textpm\fi{}5\ifmmode\pm\else\textpm\fi{}5 MeV produced in continuum ${e}^{+}{e}^{\ensuremath{-}}$ annihilations at $\sqrt{s}$ of 10.5 GeV, and decaying into a $\ensuremath{\phi}$ and a charged $\ensuremath{\pi}$.

Published
1983
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34. Planar events produced in hadron-proton collisions at 147 GeV/c and their jet-like structures

Author

A. Pevsner, S. Toaff, P. E. Stamer, W. Kittel, R. Dolfini, L. Bachman, E.D. Alyea, C. Y. Chien, P. Lucas, P. C. Trepagnier, S. Taylor, B. M. Whyman, M. Widgoff, Yong-Shi Wu, H. Rudnicka, U. Karshon, V. Henri, C. Pols, Sergio P Ratti, E. Hafen, J. T. Bober, Gideon Alexander, H. A. Rubin, J. M. Lesceux, W.W. Neale, P. Pilette, Wesley James Metzger, R. I. Hulsizer, D. Huang, D. R. Ward, T. Handler, F. Carminati, T. L. Watts, J. Grunhaus, P. Haridas, R. Windmolders, T. A. J. Frank, Aharon Levy, Y. Eisenberg, R. Dimarco, R. K. Yamamoto, P. Lutz, D. H. Brick, A. Shapira, H. O. Cohn, K. A. Burnstein, F. Grard, R.J. Plano, P. Herquet, Richard E. Ansorge, J. Goldberg, E. L. Koller, V. Suchorebrow, M. Kalelkar, V. Kistiakowsky, T. Ludlam, E. B. Brucker, A. H. Rogers, H. de Bock, S. Dado, T. B. Stoughton, S. H. Oh, R. Heifetz, I. A. Pless, W. M. Bugg, M. Schouten, J. Hanton, G. T. Condo, A. M. Shapiro, E. L. Hart, J. E. Brau, R. Steiner, S. Tether, L. Berny, R. T. Van de Walle, P.F. Jacques, Odette Benary, H. Taft, and F. Crijns

Subjects
Physics, Nuclear physics, Momentum, Particle acceleration, Jet (fluid), Physics and Astronomy (miscellaneous), Proton, Phase space, Hadron, High Energy Physics::Experiment, Fermilab, Engineering (miscellaneous), Charged particle
Abstract

An analysis is presented of the production of jets in low-ptπ±p,k+p,pp collisions at 147 GeV/c collected at Fermilab in the rapid cycling hydrogen bubble chamber hybrid spectrometer. It is shown that selected events are more planar than predicted by a cylindrical phase space, but that 3-jet and 4-jet like structures seen in the momentum flows are reasonably reproduced by the cylindrical phase space events subjected to the same mathematical manipulation required to build momentum flows.

Published
1984
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35. Evidence for charged cluster emission in 147 GeV/ π−p collisions

Author

D. Bogert, M. Widgoff, T. L. Watts, C. Fu, A. Snyder, I. A. Pless, R. K. Yamamoto, R. Zdanis, W. M. Bugg, S. Taylor, R.D. Sard, Marvin Johnson, R.J. Plano, P. C. Trepagnier, E. L. Hart, J. Grunhaus, P. Stamer, A. M. Shapiro, M. Robertson, H. A. Rubin, D. Alyea, V. Kistiakowsky, F. Bruyant, T. Handler, J. Brau, M. Heller, G. T. Condo, U. Karshon, P. Lucas, A. Napier, H. O. Cohn, D. Fong, A. Levy, T. Ludlam, J. Tortora, R.A. Burnstein, D. Ljung, E. L. Koller, C.Y. Chien, J. Wolfson, A. Pevsner, T.C. Ou, E. B. Brucker, H. Kraybill, H. D. Taft, R. I. Hulsizer, D. Petersen, and E. S. Hafen

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Hadron, Cluster (physics), Rapidity, Function (mathematics), Atomic physics, Plateau (mathematics), Quantum number, Electric charge, Charged particle
Abstract

A study of charged particle production in 147 GeV/c π − p collisions yields no evidence for an electrically neutral central region or corresponding rapidity plateau. The results do indicate that electric charge and transverse momentum may be locally conserved over small intervals on the rapidity axis. These results support a picture in which the observed hadrons are emitted in clusters whose quantum numbers vary as a function of rapidity and reflect the incident channel quantum numbers at the extremes of the rapidity scale.

Published
1976
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36. Hadron showers in a low-density fine-grained flash chamber calorimeter

Author

M. Abolins, H. Weerts, L. S. Osborne, G.J. Perkins, M. Tartaglia, W. G. Cobau, V. Kistiakowsky, W. J. Womersley, Raymond Brock, M. C. Goodman, R. Pitt, D. Bogert, J.I. Friedman, B. Strongin, T. Lyons, F. E. Taylor, R. Hatcher, S. Fuess, Henry W. Kendall, D. Owen, L. Stutte, J. Bofill, and James K. Walker

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Particle detector, Spectral line, Calorimeter, Nuclear physics, Transverse plane, Neutrino detector, Measuring instrument, High Energy Physics::Experiment, Fermilab, Instrumentation
Abstract

Hadronic showers at six incident particle energies from 33.8 to 415.4 GeV have been studied using the low-density fine-grained flash chamber calorimeter of the Lab C neutrino detector at Fermilab. Transverse distributions of unprecedented fine granularity have been obtained for a range of depths in the shower. Longitudinal energy distributions have been compared with those from iron-scintillator detectors. Some differences are observed which may be attributable to the different relative sensitivity of the two detector types to electromagnetic and hadronic shower components. Both longitudinal and transverse distributions have been parametrized. Fluctuations in energy deposition have been studied. The relative size of the fluctuations is largest near the starting vertex and in the tail of the shower, and falls slowly with increasing beam energy. Correlations between energy deposition in neighboring parts of the shower are observed, and anticorrelation is seen between energy deposition in the peak and in the tail of the shower. Containment lengths and widths have also been measured and parametrized.

Published
1988
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37. Triple-Regge analysis of the reactions π−p→ pslow + X and π−p → πfast− + X at 147 GeV/c

Author

I. A. Pless, Fernando Barreiro, U. Karshon, W. M. Bugg, J. Brau, Marvin Johnson, V. Kistiakowsky, T. Handler, E. L. Koller, A. Napier, R. I. Hulsizer, E.D. Alyea, J. Wolfson, P.F. Jacques, H. Kraybill, F. Bruyant, D. Bogert, H. D. Taft, M. Widgoff, G. T. Condo, P. Stamer, E. S. Hafen, H. O. Cohn, T.C. Ou, D. Fong, R. K. Yamamoto, M. Robertson, R.J. Plano, E. L. Hart, C. Y. Chien, J. P. Silverman, P. Lucas, T. Ludlam, A. M. Shapiro, M. Heller, D. H. Brick, T. L. Watts, P. C. Trepagnier, A. Levy, J. Tortora, A. Snyder, D. Ljung, D. Petersen, O. Benary, H. A. Rubin, C. Fu, S. Taylor, A. Pevsner, J. Grunhaus, R.A. Burnstein, R. Zdanis, and E. B. Brucker

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Formalism (philosophy of mathematics), Particle physics, Pomeron, Factorization, Quark model, Fermilab
Abstract

In this paper we present new data for the reactions π−p→pslow+X− and π−p→πfast− + X+ at 147 GeV/c. This is the first time that experimental information on these two processes has been obtained using the same apparatus at Fermilab energies. The triple-Regge formalism is applied to the differential cross sections dσ/dMx2 of both reactions using all the data at present available in the literature. A good description of the data is obtained when parameters from a triple-Regge fit of the reaction pp → p + X are used, together with the assumption of factorization of the pomeron and the reggeons. The equality of the dσ/dMx2 distributions of the two reactions may be explained in terms of an interesting assumption in the framework of the independent quark model and imposes an additional relation between the triple-Regge terms.

Published
1979
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38. D0Spectrum fromB-Meson Decay

Author

Robert Stone, Xia Yi, D. G. Cassel, C. G. Trahern, P. C. Stein, S. E. Csorna, N. Horwitz, H. Kagan, J. Chauveau, K. Kinoshita, S. L. Olsen, M. Halling, R. Plunkett, E. H. Thorndike, A. Jawahery, F. M. Pipkin, D. Weber, A. J. Sadoff, J. Hassard, Ron Poling, Y. Kubota, C. Bebek, G. Parkhurst, A. Snyder, A. Silverman, Karl Berkelman, A. C. Melissinos, Jan M. Guida, A. Chen, L. Garren, F. Sannes, K. Chadwick, M. Hempstead, D. Herrup, D. L. Kreinick, D. Andrews, S. Holzner, S. Behrends, R. Ehrlich, M. Ogg, P. Skubic, C. Rosenfeld, M. Ito, M. S. Alam, T. Ferguson, M. D. Mestayer, R. Wilcke, Murdock Gilchriese, P. Lipari, P. Avery, R. S. Panvini, B. Gittelman, R. Perchonok, R. Galik, D. Peterson, N. B. Mistry, E. Nordberg, M. Jibaly, H. Van Hecke, Joan A. Guida, D. L. Hartill, J. Kandaswamy, F. Morrow, V. Kistiakowsky, R. D. Kass, R. G. Hicks, James C. Green, G. Rucinski, T. Gentile, Sheldon Stone, R. T. Giles, G. C. Moneti, J. W. Dewire, M. Goldberg, W. W. MacKay, P. Ganci, and Richard Wilson

Subjects
Physics, Quark, Semileptonic decay, Meson, Branching fraction, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, General Physics and Astronomy, Nuclear physics, Particle decay, Pion, High Energy Physics::Experiment, B meson, Nuclear Experiment
Abstract

The inclusive branching fraction for B-meson decay into D/sup 0/ mesons and the momentum spectrum of the D/sup 0/'s have been measured. 0.8 +- 0.2 +- 0.2 D/sup 0/ per B decay was found. The shape of the spectrum suggests an interesting picture of B-meson decay.

Published
1983
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39. CRISIS detector: Characteristics and performance

Author

H. D. Taft, E. D. Alyea, Y. Wu, Fernando Barreiro, J. B. McManus, V. Kistiakowsky, T. Ludlam, A. M. Shapiro, O. E. Murphy, R.J. Plano, B.F. Wadsworth, W. M. Bugg, T. B. Stoughton, T. Kitagaki, D. Goloskie, and R. V. Steiner

Subjects
Physics, Momentum, Full width at half maximum, Range (particle radiation), Ionization, Detector, Charge density, Atomic physics, Instrumentation, Particle detector, Charged particle
Abstract

A drift chamber, which makes possible the identification of charged particles in the momentum range 5–100 GeV/c by taking 192 samples of the ionization which they produce in 1.6 cm of 80% argon–20% CO2, has been constructed and tested. It is 1×1×3 m in the sampling direction and is operated at a pressure slightly above atmospheric. It has been found to be very stable in operation and to give an average resolution for the average charge distribution of 8.13±0.18% (FWHM) in agreement with the predicted value of 8.4%.

Published
1982
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40. InclusiveΔ++(1232)production inπ−pinteractions at 15 GeV /c

Author

I. A. Pless, R. I. Hulsizer, A. Napier, J. E. Brau, J. P. Silverman, E. S. Hafen, R. K. Yamamoto, Odette Benary, P. C. Trepagnier, Aharon Levy, J. Wolfson, V. Kistiakowsky, U. Karshon, J. Grunhaus, and Fernando Barreiro

Subjects
Nuclear physics, Baryon, Physics, Particle model, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Momentum transfer, Pi, High Energy Physics::Experiment, Elementary particle, Multiplicity (chemistry)
Abstract

We present in this paper a study of the ..delta../sup + +/(1232) inclusive production for momentum transfer squared to the target proton, vertical-bartvertical-bar < 1 (GeV/c)/sup 2/. We have investigated the production mechanism of the ..delta../sup + +/ by measuring its density matrix elements as a function of t and of the missing mass squared, M/sub X//sup 2/, and by carrying out a triple-Regge analysis. For vertical-bartvertical-bar < 0.4 (GeV/c)/sup 2/, the ..delta../sup + +/ production mechanism is consistent with one-pion exchange. We have also studied the average charged multiplicity recoiling from the ..delta../sup + +/ as a function of M/sub X//sup 2/, for vertical-bartvertical-bar < 0.4 (GeV/c)/sup 2/. The study yields information about the ..pi../sup -/..pi../sup -/ average charged multiplicity.

Published
1978
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41. Inclusive ChargedD*Production ine+e−Annihilations atW=10.4GeV

Author

H. Kagan, C. Rosenfeld, Robert Stone, A. J. Sadoff, R. Galik, J. Kandaswamy, Y. Kubota, J. Chauveau, T. Gentile, J. W. Dewire, R. Perchonok, A. Fridman, Ron Poling, S. Holzner, P. Skubic, R. Cabenda, G. Parkhurst, D. Weber, M. Hempstead, N. B. Mistry, P. Lipari, A. Snyder, F. Morrow, R. Plunkett, R. S. Panvini, R. Ehrlich, J. Hassard, A. Silverman, A. Chen, P. Avery, R. D. Kass, D. Herrup, V. Kistiakowsky, P. C. Stein, S. E. Csorna, R. G. Hicks, F. Sannes, M. S. Alam, D. G. Cassell, E. Nordberg, G. Rucinski, M. Jibaly, H. Van Hecke, D. L. Kreinick, S. L. Olsen, J. Rohlf, M. D. Mestayer, C. J. Bebek, M. Goldberg, G. C. Moneti, M. Ogg, Sheldon Stone, E. H. Thorndike, W. W. MacKay, F. M. Pipkin, P. Ganci, A. C. Melissinos, R. Wilcke, H. Jawahery, Murdock Gilchriese, B. Gittelman, Joseph Izen, M. Ito, Richard Wilson, D. L. Hartill, James C. Green, D. Andrews, K. Chadwick, T. Ferguson, and N. Horwitz

Subjects
Physics, Nuclear physics, Particle physics, Particle decay, Annihilation, Meson, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Boson, Charm quark
Abstract

A measurement is presented of inclusive charged D* (2010) production from nonresonant e/sup +/e/sup -/ annihilation in the center-of-mass energy (W) range 10.2 GeV..D/sup 0/..pi../sup +/..-->..K/sup -/..pi../sup +/..pi../sup +/ and the charge conjugate mode. It is found that 40 +- 7 +- 13% of the charm quarks from the process e/sup +/e/sup -/..-->..cc-bar result in D* mesons with z>0.7 (z = 2E/W, where E is the D* energy).

Published
1982
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42. Average charged-particle multiplicities inπ−pinclusive reactions at 147 GeV/c

Author

V. Kistiakowsky, A. Pevsner, E.D. Alyea, H. Kraybill, P. W. Lucas, R. A. Burnstein, D. Brick, Fernando Barreiro, R. D. Sard, C. Y. Chien, H. D. Taft, G. T. Condo, J. P. Silverman, S. Taylor, R.J. Plano, P.F. Jacques, T. Ludlam, P. C. Trepagnier, A. Snyder, H. O. Cohn, R. Zdanis, A. Napier, E. B. Brucker, D. Fong, W. M. Bugg, J. Grunhaus, A. Levy, J. Wolfson, T. Handler, J. E. Brau, P. Stamer, Carleton DeTar, T. L. Watts, T. B. Stoughton, M. Widgoff, U. Karshon, C. Fu, T.C. Ou, E. L. Koller, Marvin Johnson, E. S. Hafen, I. A. Pless, Odette Benary, D. Petersen, E. L. Hart, F. Bruyant, A. M. Shapiro, J. Tortora, D. Ljung, M. Heller, H. A. Rubin, M. Robertson, D. Bogert, R. K. Yamamoto, and R. I. Hulsizer

Subjects
Nuclear physics, Physics, Pion, Meson, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Analytical chemistry, Hyperon, Multiplicity (mathematics), Elementary particle, Nucleon, Charged particle
Abstract

The experimentally determined average charged-particle multiplicities, , of the systems, X, produced in the following reactions for 147 GeV/c incident pion momentum are presented as functions of the square of the invariant mass of X, M/sub x//sup 2/, and of *t*: ..pi../sup -/p ..-->.. ..pi../sup -//sub fast/X, ..pi../sup -/p ..-->.. pX, ..pi../sup -/p ..-->.. ..delta../sup + +/X, ..pi../sup -/p ..-->.. (..pi../sup -/..pi../sup +/)/sub rho//sup 0/X, and ..pi../sup -/p ..-->.. ..lambda../sup 0/X. Details of the analysis are discussed. These data can be fit by the expression = A + BlnM/sub X//sup 2/ + C*t* and the coefficients obtained for B are equal within their uncertainties. C is significantly different from zero only for ..pi../sup -/p ..-->.. ..pi../sup -//sub fast/X.

Published
1979
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43. InclusiveΔ++production inpp,K+p,π+p, andπ−pinteractions at 147 GeV/c

Author

Y. Eisenberg, W. J. Metzger, P. Lutz, V. Kistiakowsky, Sergio P Ratti, Fernand Grard, E. B. Brucker, Shlomo Dado, W. M. Bugg, T. L. Watts, L. Bachman, D. H. Brick, P. Herquet, M. Kalelkar, C. Y. Chien, T. Handler, S. Toaff, R.J. Plano, J. P. Silverman, T. Ludlam, H. O. Cohn, J. W. Cooper, C. Pols, W. Kittel, A. Napier, B. M. Whyman, G. Cecchet, G. T. Condo, P. E. Stamer, R. Dolfini, H. Debock, G. Bressi, S. Dagan, E. L. Hart, Y. Oren, E.E. Ronat, R. Windmolders, A. M. Shapiro, E. S. Hafen, P. C. Trepagnier, D. R. Ward, R. I. Hulsizer, V. Henri, J. Hanton, U. Karshon, R.A. Burnstein, C. Castoldi, E. Calligarich, R. K. Yamamoto, R.D. Sard, J. Goldberg, I. A. Pless, R. L. Plumer, J. R. Carter, F. Crijns, R. Yaari, S. Taylor, E. L. Koller, A. Shapira, J. E. Brau, J. Grunhaus, G. Yekutieli, D. Hochman, E.D. Alyea, D. Lissauer, Odette Benary, G. Liguori, H. D. Taft, M. Widgoff, L. Berny, Richard E. Ansorge, R. T. Van de Walle, P.F. Jacques, Gideon Alexander, H. A. Rubin, Aharon Levy, A. Pevsner, W.W. Neale, M. Schouten, John Gordon Rushbrooke, J. Tortora, D. Ljung, and J. M. Lesceux

Subjects
Physics, Delta, Particle physics, Angular distribution, Stereochemistry, Pi
Published
1980
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44. Reactionπ−p→π−π+π−pat 8 GeV/c

Author

A. Napier, T. Kitagaki, J. Wolfson, S. Noguchi, R. Kikuchi, G. T. Condo, R. Dolfini, Y. Otani, M. F. Hodous, D. Hochman, I. A. Pless, H. O. Cohn, Kazuo Hasegawa, Fernando Barreiro, P. C. Trepagnier, E. L. Hart, T. Nozaki, K. Tamai, J. E. Brau, T. Maruyama, V. Kistiakowsky, K. Abe, J. P. Silverman, Yang Wu, P. Haridas, W. M. Bugg, R. I. Hulsizer, T. Handler, O. Benary, Akira Yamaguchi, R. K. Yamamoto, H. Yuta, S. Tanaka, E. S. Hafen, S. H. Oh, and Yoshinobu Unno

Subjects
Baryon, Nuclear physics, Physics, Particle decay, Pion, Meson, Hadron, High Energy Physics::Experiment, Elementary particle, Fermion, Boson
Abstract

Results from a high-statistics experiment involving an exposure of the SLAC 82-in. hydrogen bubble chamber to a beam of 8-GeV/c ..pi../sup -/ yielding a final state of ..pi../sup -/..pi../sup +/..pi../sup -/p are presented. Copious production of rho, ..delta../sup + +/, and f is found. Considerable quasi-two-body production in which one particle decays to one of the above resonances is also observed. Some double-resonance production involving baryon and meson resonances is also seen. The production properties of rho, ..delta../sup + +/, and f mesons are well described by a double-Regge model.

Published
1982
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45. Impact parameter analysis of multiparticle production in π−p interactions at 15 and 147 GeV/c

Author

T. Lainis, Fernando Barreiro, O. Benary, R. K. Yamamoto, J. P. Silverman, P. C. Trepagnier, I. A. Pless, R. I. Hulsizer, E. S. Hafen, and V. Kistiakowsky

Subjects
Fixed energy, Physics, Nuclear and High Energy Physics, Particle physics, Diagonal form, Mathematical model, Particle model, Momentum transfer, Transverse momentum, Multiplicity (chemistry), Impact parameter
Abstract

A recently proposed method of calculating experimental lower bounds, b L , on the root-mean-squared impact parameter of multiparticle processes has been applied to a variety of reactions in π − p interactions at 15 and 147 GeV/ c . The values obtained for b L show a decrease of the root-mean-squared impact parameter with increasing multiplicity at fixed energy and a very slow increase, if any, of b L with energy at fixed multiplicity. Furthermore, the results might indicate that absorption effects in multiparticle production in π − p interactions are not important. The transverse momentum transfer correlation matrices calculated in this paper have a diagonal form in agreement with multiperipheral type models.

Published
1979
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46. Study of Inclusive Vector-Meson Production inπ−pInteractions at 15 GeV/c

Author

V. Kistiakowsky, Amir Levy, U. Karshon, P.A. Miller, I. A. Pless, Fernando Barreiro, P. C. Trepagnier, J. Brau, E. S. Hafen, J. Grunhaus, J. P. Silverman, R. I. Hulsizer, O. Benary, R. K. Yamamoto, A. Napier, and T. Lainis

Subjects
Physics, Particle physics, Particle properties, Meson, Hadron, General Physics and Astronomy, Elementary particle, Vector meson, Omega, Boson
Abstract

We examine the polarization properties exhibited by ${\ensuremath{\rho}}^{0}'\mathrm{s}$ and ${\ensuremath{\omega}}^{0}'\mathrm{s}$ in the reactions ${\ensuremath{\pi}}^{\ensuremath{-}}+p\ensuremath{\rightarrow}{\ensuremath{\rho}}^{0}+{X}^{0}$ and ${\ensuremath{\pi}}^{\ensuremath{-}}+p\ensuremath{\rightarrow}{\ensuremath{\omega}}^{0}+\mathrm{charged}\mathrm{particles}$ at 15 GeV/c. ${\ensuremath{\rho}}^{0}$ production is analyzed in the framework of the triple Regge model. The trajectory coupled to the ${\ensuremath{\pi}}^{\ensuremath{-}}$ ${\ensuremath{\rho}}^{0}$ is $\ensuremath{\alpha}(t)=(\ensuremath{-}0.12\ifmmode\pm\else\textpm\fi{}0.07)+(0.78\ifmmode\pm\else\textpm\fi{}0.21)t$ in good agreement with the $\ensuremath{\pi}$ trajectory. The properties of the system recoiling against the ${\ensuremath{\rho}}^{0}$ (off-shell $``{\ensuremath{\pi}}^{\ensuremath{-}}''p$ reaction) are very similar to those of the final states of on-shell ${\ensuremath{\pi}}^{\ensuremath{-}}p$ reactions at the same center-of-mass energy.

Published
1978
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47. Inelastic 2-prong events in 147 GeV/cπ−p collisions

Author

A. Napier, T.C. Ou, P. C. Trepagnier, J. Wolfson, H. O. Cohn, V. Kistiakowsky, I. A. Pless, D. Fong, T. L. Watts, M. Robertson, C. Fu, P. Lucas, U. Karshon, D. Alyea, R.A. Burnstein, R. Zdanis, D. Petersen, R.J. Plano, C. Y. Chien, J. Grunhaus, A. Pevsner, H. A. Rubin, Marvin Johnson, E. S. Hafen, J. Brau, F. Bruyant, A. Snyder, R. I. Hulsizer, M. Heller, J. Tortora, A. Levy, R. K. Yamamoto, R.D. Sard, D. Bogert, M. Widgoff, and A.M. Shapiro

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics
Published
1976
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48. Comparison of 147 GeV/c π− p low transverse momentum hadron production with deep-inelastic leptoproduction

Author

T. L. Watts, Amir Levy, P. E. Stamer, M. Widgoff, D. H. Brick, A. M. Shapiro, E. S. Hafen, E.D. Alyea, P. C. Trepagnier, I. A. Pless, H. D. Taft, E. L. Koller, P. Lutz, S. H. Oh, V. Kistiakowsky, J. P. Silverman, W. M. Bugg, T. Ludlam, M. Kalelkar, R.J. Plano, H. O. Cohn, E. B. Brucker, H. Rudnicka, R. K. Yamamoto, R. I. Hulsizer, and T. B. Stoughton

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Scattering, Phase space, Hadron, Elementary particle, Quantum field theory, Inelastic scattering, Deep inelastic scattering, Engineering (miscellaneous), Beam (structure)
Abstract

Distributions with respect toz andzR for the fastest and second fastest particles produced in both beam and target hemispheres from 147 GeV/c π− interactions are compared with each other and with the distributions for the fastest and second fastest particles from deepinelastic leptoproduction and Field-Feynman curves. The distributions and curves for the fastest particles are very similar, with the exception of the identified protons. Those for the second fastest are in agreement. Distributions with respect toz′R for the first through fourth fastest particles (excepting the protons) are all similar, suggesting that the shape of the distributions may be determined by the available longitudinal phase space.

Published
1982
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49. Inclusive and semi-inclusive charge structure in π−p multiparticle production at 147 GeV/c

Author

W. M. Bugg, T. L. Watts, T. Handler, V. Kistiakowsky, D. H. Brick, M. Schouten, I. A. Pless, H. O. Cohn, E. B. Brucker, S. H. Oh, J. Brau, R. I. Hulsizer, E. S. Hafen, M. Widgoff, P. C. Trepagnier, A. Napier, W. Kittel, R. K. Yamamoto, O. Benary, J. P. Silverman, P. E. Stamer, A. M. Shapiro, P.F. Jacques, Fernando Barreiro, and E. L. Koller

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Projectile, Phase space, Charge model, Method of analysis, Atomic physics, Space (mathematics), Electric charge, Graph, Charged particle
Abstract

A new method of analysis (leading charge model) based on the zone graph technique is used to separate charged particles produced in the target, projectile and central regions of phase space. A significant fraction of the centrally produced particles follow a Bose momentum distribution with temperature of 131 ± 2 MeV.

Published
1979
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50. Erratum to 'hadron showers in a low-density fine-grained flash chamber calorimeter'

Author

James K. Walker, G.J. Perkins, R. Pitt, F. E. Taylor, S. Fuess, M. C. Goodman, V. Kistiakowsky, W. G. Cobau, J.I. Friedman, Raymond Brock, R. Hatcher, W. J. Womersley, L. Stutte, D. Owen, Henry W. Kendall, L.S. Osborne, T. Lyons, B. Strongin, D. Bogert, H. Weerts, J. Bofill, M. Tartaglia, and M. Abolins

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Hadron, Particle detector, Calorimeter, Nuclear physics, Flash (photography), Neutrino detector, Measuring instrument, Deposition (phase transition), High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Instrumentation
Abstract

Our recent paper ∗ described an analysis of the energy deposition in hadronic showers at six incident particle energies from 33.8 to 415.4 GeV using the low-density fine-grained flash chamber calorimeter of the Lab C neutrino detector at Fermilab. More recent work on the subject has led us to revise some of the results presented for energies above 200 GeV. We present here revised results for the longitudinal and transverse energy deposition, and new coefficients for the parametrization of these curves.

Published
1989
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