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1. Experimental search for neutrinoless double-β decay ofMo100

Author

R. A. Reeder, C.P. Leavitt, Robert D. Tripp, Margaret Alston-Garnjost, C.S. Sutton, J. Baker, H. Nicholson, S. D. Foltz, Robert W. Kenney, B. D. Dieterle, J. M. Krivicich, A. J. Caffrey, and B. L. Dougherty

Subjects
Physics, Particle physics, Double beta decay, General Physics and Astronomy, Atomic physics, Lepton number, Lower limit, Radioactive decay
Abstract

No evidence for the neutrinoless double-\ensuremath{\beta} decay of $^{100}\mathrm{Mo}$ has been found in a search using a segmented Si(Li) detector with source foils enriched to 97% $^{100}\mathrm{Mo}$. After 0.2664 mole years of exposure, we report a 1\ensuremath{\sigma} lower limit on the half-life for the ${\mathit{J}}^{\mathit{P}}$=${0}^{+}$\ensuremath{\rightarrow}${0}^{+}$ transition of 0.44\ifmmode\times\else\texttimes\fi{}${10}^{23}$ years.

Published
1993
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2. Test of spin dependence in charm-quark fragmentation to D*

Author

K. A. Schwitkis, R. W. Stephens, Ronald R. Ross, W. Vernon, M. T. Ronan, B. C. Shen, W. A. Wenzel, T. K. Edberg, D. J. Lambert, M. Pripstein, W. T. Lin, Allan G Clark, J. S. Steinman, K. H. Fairfield, R. R. Kofler, M. L. Stevenson, A. Fridman, S. K. Park, Robert W. Kenney, T. Kamae, S. Khacheryan, A. P.T. Palounek, D. A. Crane, J. M. Hauptman, C. D. Buchanan, H. P. Paar, A. Bay, S. J. Yellin, N. A. Nicol, J. J. Eastman, G. D. Cowan, F. R. Rouse, H. Marsiske, G. Zapalac, A. Lu, Philippe Eberhard, S. J. Maxfield, Hiroaki Aihara, C. Ho, S. Toutounchi, Margaret Alston-Garnjost, Elliott D. Bloom, Y. T. Oyang, R. van Tyen, H. Y. Chao, C. Zeitlin, A. R. Barker, S. C. Loken, S. B. Chun, E. S. Miller, G. Lynch, J. G. Layter, R. E. Avery, H. Yamamoto, K. A. Derby, P. J. Oddone, B. D. Magnuson, Werner Hofmann, E. M. Wang, M. G. Strauss, H. Oh, J. Lys, R. J. Madaras, F.L. Linde, H. H. Bingham, J. C. Sens, D. R. Nygren, D. O. Caldwell, Tadayuki Takahashi, George P Yost, Orin I. Dahl, M. Daoudi, R. Belcinski, G. Masek, Y. X. Wang, D. H. Stork, Z. R. Wolf, Willem G. J. Langeveld, G. Shapiro, A. M. Eisner, D. E. Pellett, G. J. VanDalen, F. C. Erné, D. A. Bauer, G. Godfrey, M. K. Sullivan, J. R. Smith, L. G. Mathis, and IHEF (IoP, FNWI)

Subjects
Quark, Physics, Density matrix, Particle physics, Annihilation, Time projection chamber, Computer Science::Information Retrieval, Elementary particle, Fermion, Helicity, Charm quark, Nuclear physics, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, High Energy Physics::Experiment
Abstract

We have measured the polarization of {ital D}{sup *}, the energy dependence of the polarization, and the spin-density matrix of {ital D}{sup *} in {ital e}{sup +}{ital e{minus}} annihilation at a center-of-mass energy of 29 GeV using the Time Projection Chamber detector at the SLAC storage ring PEP. In 147 pb{sup {minus}1} of data we see no strong evidence for polarization, alignment, or final-state interactions in this fragmentation process.

Published
1991

3. Measurement of the total hadronic cross section in taggedγγreactions

Author

N. A. Nicol, Orin I. Dahl, F. R. Rouse, J. G. Layter, J. J. Eastman, R. Belcinski, S. Toutounchi, G. Masek, Robert W. Kenney, D. H. Stork, C. Ho, M. K. Sullivan, L. G. Mathis, C. Zeitlin, H. Aihara, Philippe Eberhard, A. R. Clark, S. J. Maxfield, R. E. Avery, M. G. Strauss, S. K. Park, T. Kamae, E. M. Wang, T. K. Edberg, S. C. Loken, William A. Wenzel, Z. R. Wolf, W. Vernon, M. Pripstein, Willem G. J. Langeveld, J. S. Steinman, K. A. Derby, M. T. Ronan, M. L. Stevenson, Werner Hofmann, P. J. Oddone, W. T. Lin, W. Wagner, D. A. Bauer, R. R. McNeil, George P Yost, Y. T. Oyang, D. E. Pellett, Tadayuki Takahashi, G. Godfrey, J. Lys, A. Fridman, M. Daoudi, R. R. Kofler, H. Yamamoto, B. D. Magnuson, H. Oh, D. R. Nygren, J. C. Sens, H. H. Bingham, Gilbert Shapiro, D. O. Caldwell, S. Khacheryan, S. J. Yellin, J. R. Smith, S. B. Chun, R. W. Stephens, G. Lynch, F. C. Erné, A. M. Eisner, Ronald R. Ross, K. H. Fairfield, H. P. Paar, G. J. VanDalen, J. M. Hauptman, C. D. Buchanan, K. A. Schwitkis, H. Marsiske, A. P.T. Palounek, G. D. Cowan, A. Bay, D. J. Lambert, G. Zapalac, Margaret Alston-Garnjost, R. van Tyen, A. R. Barker, H. Y. Chao, D. A. Crane, F.L. Linde, R. J. Madaras, B. C. Shen, A. Lu, Elliott D. Bloom, Y. X. Wang, and E. S. Miller

Subjects
Physics, Quantum chromodynamics, Nuclear physics, Particle physics, Photon, Scattering, Hadron, Elementary particle, Parton, Fermion, Energy (signal processing)
Abstract

We present a measurement of the total cross section for {gamma}{gamma}{r arrow}hadrons, with one photon quasireal and the other a spacelike photon of mass squared {minus}{ital Q}{sup 2}. Results are presented as a function of {ital Q}{sup 2} and the {gamma}{gamma} center-of-mass energy {ital W}, with the {ital Q}{sup 2} range extending from 0.2 to 60 GeV{sup 2}, and {ital W} in the range from 2 to 10 GeV. The data were taken with the TPC/Two-Gamma facility at the SLAC {ital e}{sup +}{ital e}{sup {minus}} storage ring PEP, which was operated at a beam energy of 14.5 GeV. The cross section exhibits a gentle falloff with increasing {ital W}. Its {ital Q}{sup 2} dependence is shown to be well described by an incoherent sum of vector-meson and pointlike scattering over most of the observed {ital W} range. Agreement at high {ital Q}{sup 2} is improved if a minimum-{ital p}{sub {ital T}} cutoff (motivated by QCD) is imposed on the pointlike contribution.

Published
1990
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4. Inclusive D*+- production in photon-photon collisions

Author

G. Shapiro, L. G. Mathis, S. Yellin, J. J. Eastman, T. K. Edberg, S. K. Park, S. Khacheryan, S. Toutounchi, P. J. Oddone, R. W. Stephens, J. S. Steinman, W. Vernon, A. Bay, G. Zapalac, W. T. Lin, C. Zeitlin, Margaret Alston-Garnjost, D. A. Crane, B. C. Shen, G. Masek, R. R. Ross, K. H. Fairfield, H. P. Paar, A. Lu, Elliott D. Bloom, R. R. Kofler, Y. T. Oyang, S. B. Chun, R. J. Madaras, G. Lynch, M. L. Stevenson, D. H. Stork, J. Lys, J. G. Layter, D. A. Bauer, R. E. Avery, K. T. Knopfle, H. Marsiske, S. C. Loken, M. T. Roman, H. Yamamoto, J. M. Hauptman, E. M. Wang, Orin I. Dahl, P. H. Eberhard, E. S. Miller, G. Godfrey, D. R. Nygren, Werner Hofmann, N. A. Nicol, F. C. Erné, H. Y. Chao, F.L. Linde, M. Pripstein, Allan G Clark, George P Yost, A. Buijs, C. D. Buchanan, M. Daoudi, M. G. Strauss, R. Belcinski, H. H. Bingham, A. R. Barker, D. E. Pellett, D. J. Lambert, W. A. Wenzel, Y. X. Wang, M. K. Sullivan, Willem G. J. Langeveld, R. W. Kenney, A. M. Eisner, A. P.T. Palounek, J. C. Sens, D. O. Caldwell, and IHEF (IoP, FNWI)

Subjects
Physics, Quark, Nuclear and High Energy Physics, Particle physics, Photon, Meson, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, Parton, Hadronization, Nuclear physics, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment
Abstract

The TPC/Two-Gamma Collaboration has measured the inclusive cross section for production of charmed D∗± mesons in photon-photon collisions. The reaction utilized was e+e-→e+e-D∗±X, with D∗±→DOπ+-, DO→K-+π ±, and either zero or one outgoing e± detected. The result, σ(e + e - → e + e - D ∗± X) = 74±26±19 pb , is in agreement with the quark parton mo del prediction for e+e- → e+e-c c , combined with a Lund model for the hadronization of the charmed quarks.

Published
1990

5. Partial-wave analysis of theK¯Nsystem from 360 to 1320 MeV/c

Author

Ronald R. Ross, M. Ferro-Luzzi, Robert W. Kenney, Robert D. Tripp, Margaret Alston-Garnjost, D. L. Pollard, and H. Nicholson

Subjects
Nuclear physics, Physics, Antiparticle, Particle physics, Amplitude, Meson, Partial wave analysis, Hadron, Elementary particle, Lambda, Boson
Abstract

In this paper we use new data from several recent $\overline{K}N$ experiments in conjunction with older data to make an energy-dependent partial-wave analysis of the $\overline{K}N$ system. The important new additions never used before in a partial-wave analysis are our precision measurements of the charge-exchange total cross sections, our measurements of the charge-exchange angular distributions, and the first measurements of the ${K}^{\ensuremath{-}}p$ polarization at these low momenta. A new feature introduced in the analysis is the $S$-wave cusp treatment at the $\ensuremath{\Lambda}\ensuremath{\eta}$ and ${\ensuremath{\Sigma}}^{0}\ensuremath{\eta}$ thresholds, which we find necessary to describe the observed behavior in the charge-exchange total cross sections near these thresholds. Other features include a single-channel unitary formulation for resonances and backgrounds and a parametrization of these amplitudes incorporating centrifugal-barrier effects. New values for masses, widths, and elasticities for resonances in this region are reported and better evidence is found for several of the less well established resonances. None of the new resonances suggested by recent $I=0$ and $I=1$ total-cross-section measurements are required. Fits are displayed for all the data used and predictions of this partial-wave analysis are compared with those of two other recent analyses for certain quantities yet to be measured. A table of the amplitudes, in steps of 20 MeV/c, is provided.

Published
1978
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6. K*0andKS0Meson Production ine+e−Annihilations at 29 GeV

Author

J. M. Hauptman, A. Barbaro-Galtieri, B. Gabioud, B. C. Shen, L. Madansky, W.A. Wenzel, J. E. Huth, J. Hylen, H. Yamamoto, W. Moses, C. S. Lindsey, Gilbert Shapiro, R. I. Koda, M. L. Stevenson, S. C. Loken, T. Kamae, G. J. VanDalen, K. A. Derby, W. M. Zhang, F. R. Rouse, Q. Chamberlain, A. Cordier, A. Pevsner, Hirotsugu Fujii, D. A. Park, R. R. Kofler, Peter Nemethy, Philippe Eberhard, G. R. Lynch, Toshitsugu Fujii, N. Toge, Marjorie Shapiro, Orin I. Dahl, R. F. van Daalen Wetters, C. Y. Chien, Nicholas John Hadley, M. T. Ronan, E. M. Wang, M. Yamauchi, Hiroaki Aihara, Werner Hofmann, B. A. Barnett, L. T. Kerth, J. W. Gary, K. K. Kwong, Margaret Alston-Garnjost, R. van Tyen, A. D. Bross, W. E. Slater, Mitchell Wayne, A. R. Clark, A. V. Barnes, D. L. Fancher, D. H. Stork, P. J. Oddone, R. R. Sauerwein, J. G. Layter, K. Maruyama, R. R. Ross, H. K. Ticho, R. J. Madaras, J. A. Bakken, W. Gorn, H. S. Kaye, Barry Blumenfeld, C. D. Buchanan, C. T. Day, P. R. Robrish, J. N. Marx, X. Q. Lu, D. R. Nygren, J. A. J. Matthews, M. Pripstein, S. O. Melnikoff, and R. W. Kenney

Subjects
Nuclear physics, Physics, Particle physics, Antiparticle, Annihilation, Pion, Meson, Antimatter, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle
Abstract

The inclusive production cross sections and transverse momentum distributions of ${K}^{*0}$ and ${{K}_{S}}^{0}$ mesons in ${e}^{+}{e}^{\ensuremath{-}}$ annihilation at a center-of-mass energy of 29 GeV have been measured by means of the time projection chamber detector in the PEP-4 experiment. The mean multiplicites are found to be 0.49 \ifmmode\pm\else\textpm\fi{} 0.04(stat.) \ifmmode\pm\else\textpm\fi{} 0.07(syst.) (${K}^{*0}+{\stackrel{-}{K}}^{*0}$) and 1.22 \ifmmode\pm\else\textpm\fi{} 0.03(stat.) \ifmmode\pm\else\textpm\fi{}0.15(syst.) (${K}^{0}+{\stackrel{-}{K}}^{0}$) per event.

Published
1984
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8. Study of baryon correlations ine+e−annihilation at 29 GeV

Author

A. Lu, Peter Nemethy, J. S. Steinman, J. E. Huth, B. C. Shen, S. Toutounchi, T. Kamae, L. Mathis, R. R. McNeil, A. Barbaro-Galtieri, R. R. van Daalen Wetters, B. A. Barnett, R. Lander, Kaori Maeshima, C. D. Buchanan, S. C. Loken, E. M. Wang, D. E. Pellet, Margaret Alston-Garnjost, R. van Tyen, W. G.J. Langeveld, H. U. Bengtsson, B. van Uitert, G. E. Masek, E. S. Miller, X. Q. Lu, K. A. Schwitkis, H. Yamamoto, S. O. Melnikoff, Hiroaki Aihara, J. N. Marx, R. I. Koda, J. Hylen, N. Toge, S. J. Yellin, S. J. Maxfield, C. Zeitlin, F. R. Rouse, C. S. Lindsey, K. A. Derby, R. W. Kenney, J. T. White, J. C. Sens, D. O. Caldwell, W. Vernon, M. S. C. Williams, Z. R. Wolf, G. Cowan, Mitchell Wayne, J. Thompson, Marjorie Shapiro, W. Moses, G. J. VanDalen, B. D. Magnuson, J. W. Gary, D. A. Park, Toshitsugu Fujii, Philippe Eberhard, H. S. Kaye, T. K. Edberg, G. R. Lynch, Y. X. Wang, Tadayuki Takahashi, Ryoji Enomoto, W. E. Slater, M. G. Strauss, A. Buijs, P. J. Oddone, F.L. Linde, Werner Hofmann, R.E. Avery, R. R. Ross, T. Bolognese, H. P. Paar, R. J. Madaras, D. A. Crane, W. Gorn, S. K. Park, J. J. Eastman, W.A. Wenzel, Gilbert Shapiro, M. L. Stevenson, M. T. Ronan, K. K. Kwong, M. Pripstein, J. A. J. Matthews, M. K. Sullivan, A. D. Bross, A.R. Barker, J. R. Smith, K. H. Kees, D. R. Nygren, J. M. Hauptman, W. M. Zhang, R. R. Kofler, F. C. Erné, A. M. Eisner, Winston Ko, G. J. Bobbink, Orin I. Dahl, D. L. Bintinger, Wolfgang Wagner, A. R. Clark, D.A. Bauer, L. T. Kerth, A. V. Barnes, D. H. Stork, and J. G. Layter

Subjects
Baryon, Nuclear physics, Physics, Particle physics, Annihilation, Electron–positron annihilation, General Physics and Astronomy
Published
1986
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9. Exclusive production ofpp¯π+π−in photon-photon collisions

Author

T. K. Edberg, H. Y. Chao, K. A. Derby, W. T. Lin, M. K. Sullivan, S. K. Park, T. Kamae, E. S. Miller, J. J. Eastman, S. Toutounchi, S. Khacheryan, H. S. Kaye, J. A. J. Matthews, Robert W. Kenney, J. C. Sens, F.L. Linde, D. O. Caldwell, A. Bay, J. G. Layter, G. D. Cowan, C. D. Buchanan, M. G. Strauss, D. A. Crane, C. Zeitlin, H. P. Paar, K. A. Schwitkis, D. E. Pellett, W. Moses, Y. X. Wang, J. M. Hauptman, M. Pripstein, Angela Barbaro-Galtieri, F. C. Erné, Margaret Alston-Garnjost, R. van Tyen, A. M. Eisner, M. Daoudi, R. E. Avery, Ronald R. Ross, Orin I. Dahl, Tadayuki Takahashi, B. C. Shen, Z. R. Wolf, E. M. Wang, Willem G. J. Langeveld, J. Hylen, G. Masek, F. R. Rouse, H. Yamamoto, J. R. Smith, S. J. Yellin, A. R. Barker, R. W. Stephens, S. C. Loken, R. J. Madaras, D. H. Stork, A. R. Clark, M. L. Stevenson, Gilbert Shapiro, D. A. Bauer, W. Wagner, G. J. Bobbink, J. S. Steinman, Werner Hofmann, William A. Wenzel, L. G. Mathis, K. H. Fairfield, H. Aihara, P. J. Oddone, B. A. Barnett, R. R. Kofler, S. B. Chun, G. Lynch, B. D. Magnuson, D. R. Nygren, Philippe Eberhard, S. J. Maxfield, A. Buijs, W. Vernon, and M. T. Ronan

Subjects
Physics, Particle physics, Crystallography, Antiparticle, Meson, Hadron, Production (computer science), Elementary particle, Lambda baryon, Energy (signal processing), Bar (unit)
Abstract

We report a measurement of the ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}p\overline{p}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ process with the TPC/Two-Gamma facility at the PEP ${e}^{+}{e}^{\ensuremath{-}}$ storage ring at SLAC. Forty-five $p\overline{p}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ events were identified in data corresponding to an integrated ${e}^{+}{e}^{\ensuremath{-}}$ luminosity of 142 ${\mathrm{pb}}^{\ensuremath{-}1}$. The cross section for $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}p\overline{p}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ is given both as a function of the $\ensuremath{\gamma}\ensuremath{\gamma}$ center-of-mass energy ${W}_{\ensuremath{\gamma}\ensuremath{\gamma}}$, with ${W}_{\ensuremath{\gamma}\ensuremath{\gamma}}$ between 2.5 and 5.5 GeV, and as a function of the in variant mass squared ${q}^{2}$ of one of the photons, with $\ensuremath{-}{q}^{2}l7$ Ge${\mathrm{V}}^{2}$. This cross section falls much less rapidly with ${W}_{\ensuremath{\gamma}\ensuremath{\gamma}}$ than does the cross section for a similar process, $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}p\overline{p}$. No ${\ensuremath{\Delta}}^{0}{\overline{\ensuremath{\Delta}}}^{0}$ production is observed, and only a small fraction of the events at low ${W}_{\ensuremath{\gamma}\ensuremath{\gamma}}$ is consistent with $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}{\ensuremath{\Delta}}^{++}{\overline{\ensuremath{\Delta}}}^{\ensuremath{-}\ensuremath{-}}$, ${\ensuremath{\Delta}}^{++}\overline{p}{\ensuremath{\pi}}^{\ensuremath{-}}$, or ${\overline{\ensuremath{\Delta}}}^{\ensuremath{-}\ensuremath{-}}p{\ensuremath{\pi}}^{+}$. In an expanded search through the same data, four events compatible with either $\ensuremath{\Lambda}\overline{\ensuremath{\Lambda}}(\ensuremath{\Lambda}\ensuremath{\rightarrow}p{\ensuremath{\pi}}^{\ensuremath{-}})$ or ${\ensuremath{\Sigma}}^{0}\overline{\ensuremath{\Lambda}}({\ensuremath{\Sigma}}^{0}\ensuremath{\rightarrow}\ensuremath{\Lambda}\ensuremath{\gamma})$ production were found.

Published
1989
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10. ΛProduction ine+e−Annihilation at 29 GeV

Author

B. A. Barnett, B. Gabioud, W. E. Slater, G. J. VanDalen, A. Pevsner, Hirotsugu Fujii, D. A. Park, Philippe Eberhard, A. Barbaro-Galtieri, J. W. Gary, W. Gorn, G. R. Lynch, C. S. Lindsey, K. Maruyama, R. F. van Daalen Wetters, Marjorie Shapiro, C. Y. Chien, K. A. Derby, W. Moses, M. Pripstein, L. T. Kerth, Werner Hofmann, H. K. Ticho, J. A. Bakken, P. J. Oddone, H. S. Kaye, J. E. Huth, R. R. Ross, M. T. Ronan, K. K. Kwong, R. J. Madaras, A. R. Clark, D. L. Fancher, H. Aihara, M. Yamauchi, A. Cordier, L. Madansky, J. M. Hauptman, C. D. Buchanan, J. Hylen, T. Kamae, H. Yamamoto, R. I. Koda, D. R. Nygren, Peter Nemethy, Barry Blumenfeld, A. D. Bross, J. A. J. Matthews, S. C. Loken, Owen Chamberlain, W.A. Wenzel, Gilbert Shapiro, Nicholas John Hadley, F. R. Rouse, M. L. Stevenson, X. Q. Lu, Mitchell Wayne, Toshitsugu Fujii, E. M. Wang, Margaret Alston-Garnjost, R. van Tyen, B. C. Shen, P. R. Robrish, S. O. Melnikoff, R. W. Kenney, N. Toge, W. M. Zhang, R. R. Kofler, J. N. Marx, Orin I. Dahl, C. T. Day, A. V. Barnes, D. H. Stork, R. R. Sauerwein, and J. G. Layter

Subjects
Physics, Particle physics, Annihilation, Electron–positron annihilation, Hadron, General Physics and Astronomy, Lambda baryon, Lambda, Baryon, Pair production, Antimatter, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment
Abstract

The inclusive production cross section of ..lambda.., anti ..lambda.. in e/sup +/e/sup -/ annihilation at a c.m. energy of 29 GeV has been measured with the time-projection-chamber detector at PEP. The average lambda, anti lambda multiplicity has been measured to be 0.197 +/- 0.012 (stat.) +/- 0.017 (syst.). ..lambda..-anti..lambda.. pairs have been observed in jets for the first time, and the average number of ..lambda..-anti..lambda.. pairs per event has been measured to be 0.042 +/- 0.017 +/- 0.014. 8 references, 3 figures.

Published
1985
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11. Tests of Models for Parton Fragmentation by Means of Three-Jet Events ine+e−Annihilation ats=29GeV

Author

B. A. Barnett, W. M. Zhang, G. R. Lynch, R. R. Kofler, Mitchell Wayne, C. Y. Chien, L. Madansky, R. I. Koda, Orin I. Dahl, D. R. Nygren, N. Toge, J. A. Bakken, H. S. Kaye, Werner Hofmann, W. Moses, E. M. Wang, A. R. Clark, Margaret Alston-Garnjost, R. van Tyen, A. Cordier, Barry Blumenfeld, A. Pevsner, H. U. Bengtsson, J. G. Layter, B. Gabioud, Owen Chamberlain, J. N. Marx, Marjorie Shapiro, B. C. Shen, J. M. Hauptman, Peter Nemethy, J. E. Huth, Toshitsugu Fujii, Nicholas John Hadley, H. Yamamoto, D. L. Fancher, A. Barbaro-Galtieri, Y. Yamauchi, T. Kamae, C. T. Day, J. A. J. Matthews, K. Maruyama, Philippe Eberhard, J. W. Gary, F. R. Rouse, A. V. Barnes, S. O. Melnikoff, H. K. Ticho, R. F. van Daalen Wetters, D. H. Stork, A. D. Bross, P. R. Robrish, W.A. Wenzel, Gilbert Shapiro, R. R. Sauerwein, C. S. Lindsey, J. Hylen, W. E. Slater, L. T. Kerth, M. Pripstein, R. W. Kenney, X. Q. Lu, M. L. Stevenson, M. T. Ronan, K. A. Derby, K. K. Kwong, H. Aihara, G. J. VanDalen, Hirotsugu Fujii, D. A. Park, S. C. Loken, C. D. Buchanan, P. J. Oddone, R. R. Ross, R. J. Madaras, and W. Gorn

Subjects
Quantum chromodynamics, Physics, Particle physics, Annihilation, Mathematical model, Quark model, Hadron, Lund string model, General Physics and Astronomy, Parton, Elementary particle, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The distribution of particles in three-jet events is compared with the predictions of three fragmentation models currently in use: the Lund string model, the Webber cluster model, and an independent fragmentation model. The Lund model and, to a certain extent, the Webber model provide reasonable descriptions of the data. The independent fragmentation model does not describe the distribution of particles at large angles with respect to the jet axes. The results provide evidence that the sources of hadrons are Lorentz boosted with respect to the overall c.m.

Published
1985
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12. Tests of models for quark and gluon fragmentation ine + e − annihilation at $$\sqrt s = 29 GeV$$

Author

R. I. Koda, J. A. J. Matthews, H. Yamamoto, R. R. Kofler, K. A. Derby, P. Nemethy, T. Kamae, H. K. Ticho, D. H. Stork, R. J. Madaras, W. Moses, H. Fujii, J. E. Huth, M. Yamauchi, F. R. Rouse, W. M. Zhang, H. S. Kaye, A. V. Barnes, Ronald R. Ross, R. F. van Daalen Wetters, C. Y. Chien, R. R. Sauerwein, P. R. Robrish, A. Cordier, Marjorie Shapiro, B. Gabioud, C. D. Buchanan, M. Pripstein, A. Pevsner, N. J. Hadley, C. S. Lindsey, L. Madansky, A. D. Bross, S. O. Melnikoff, L. T. Kerth, Orin I. Dahl, M. T. Ronan, Gilbert Shapiro, M. R. Wayne, C. T. Day, J. G. Layter, Robert W. Kenney, William A. Wenzel, B. C. Shen, G. Lynch, Angela Barbaro-Galtieri, G. J. van Dalen, B. J. Blumenfeld, P. J. Oddone, J. Hylen, Werner Hofmann, D. A. Park, W. Gorn, J. W. Gary, S. C. Loken, Margaret Alston-Garnjost, R. van Tyen, W. E. Slater, X. Q. Lu, B. A. Barnett, Philippe Eberhard, K. Maruyama, J. A. Bakken, A. R. Clark, H. U. Bengtsson, K. K. Kwong, D. R. Nygren, Owen Chamberlain, J. N. Marx, J. M. Hauptman, E. M. Wang, M. L. Stevenson, D. L. Fancher, N. Toge, and Hiroaki Aihara

Subjects
Quark, Physics, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Lund string model, Elementary particle, Parton, Gluon, Nuclear physics, Pion, Quark–gluon plasma, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous)
Abstract

Three currently used fragmentation models are tested by studying the distribution of particles between jet axes in the 3-jet events ofe+e− annihilation, using data collected by the Time Projection Chamber at PEP. These three models — the Lund String model, the Webber Cluster model and an Independent Fragmentation model (IF) — each implement different Lorentz-frame structures for the fragmentation process of quarks and gluons into hadrons. The Lund model provides a good description of the data, while the IF model does not. The Webber model, which is untuned, does not describe the absolute particle densities between jets, but correctly predicts the ratios of those densities, which are less sensitive to the tuning.

Published
1985
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13. Characteristics of Proton Production in Jets frome+e−Annihilation at 29 GeV

Author

X. Q. Lu, W. E. Slater, W.A. Wenzel, Gilbert Shapiro, W. Gorn, M. L. Stevenson, S. C. Loken, A. R. Clark, D. H. Badtke, J. G. Layter, Peter Nemethy, B. Gabioud, C. D. Buchanan, L. Madansky, A. Barbaro-Galtieri, G. R. Lynch, C. S. Lindsey, H. Iwasaki, Owen Chamberlain, H. J. Hilke, W. M. Zhang, R. I. Koda, H. Videau, P. S. Martin, R. R. Kofler, J. Chiba, J. A. Bakken, R. M. Majka, Philippe Eberhard, A. Cordier, S. O. Melnikoff, M. T. Ronan, K. K. Kwong, C. Y. Chien, C. T. Day, Marjorie Shapiro, Mitchell Wayne, Orin I. Dahl, D. R. Nygren, G. J. VanDalen, N. Toge, K. Maruyama, Werner Hofmann, P. J. Oddone, W. Moses, R. F. van Daalen Wetters, R. W. Kenney, Hirotsugu Fujii, D. A. Park, P. R. Robrish, J. A. J. Matthews, L. T. Kerth, J. M. Hauptman, R. R. Ross, R. J. Madaras, H. K. Ticho, H. Yamamoto, D. L. Fancher, Hiroaki Aihara, J. Hylen, K. A. Derby, J. W. Gary, B. A. Barnett, F. R. Rouse, M. Yamauchi, M. Pripstein, Toshitsugu Fujii, A. D. Bross, Margaret Alston-Garnjost, Nicholas John Hadley, R. van Tyen, J. E. Huth, B. C. Shen, J. N. Marx, Barry Blumenfeld, T. Kamae, A. V. Barnes, D. H. Stork, R. R. Sauerwein, and A. Pevsner

Subjects
Physics, Particle physics, Annihilation, Proton, Meson, Nuclear Theory, Hadron, General Physics and Astronomy, Elementary particle, Nuclear physics, Baryon, Pion, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract

Proton production in e/sup +/e/sup -/ annihilation at 29 GeV has been studied with the time projection chamber. Measurements of the dependence of proton fractions on momentum, transverse momentum with respect to the jet axis, hadron multiplicity, and event sphericity are reported. Our results are consistent with the assumption that primary baryons and mesons have similar production spectra, and indicate that protons provide more direct probes of underlying fragmentation phenomena than do pions.

Published
1984
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14. Baryon Production ine+e−Annihilation ats=29GeV: Clusters or Diquarks?

Author

W. Moses, D. L. Fancher, S. C. Loken, M. Yamauchi, B. C. Shen, A. D. Bross, X. Q. Lu, G. R. Lynch, H. U. Bengtsson, C. Y. Chien, Werner Hofmann, J. W. Gary, Marjorie Shapiro, Owen Chamberlain, J. N. Marx, B. A. Barnett, A. Cordier, Mitchell Wayne, J. M. Hauptman, H. Yamamoto, Barry Blumenfeld, M. Pripstein, A. V. Barnes, K. Maruyama, D. H. Stork, R. R. Sauerwein, P. R. Robrish, E. M. Wang, W.A. Wenzel, H. K. Ticho, W. M. Zhang, Philippe Eberhard, F. R. Rouse, R. R. Kofler, Gilbert Shapiro, Margaret Alston-Garnjost, R. van Tyen, W. Gorn, Orin I. Dahl, D. R. Nygren, S. O. Melnikoff, J. A. J. Matthews, M. L. Stevenson, J. G. Layter, Toshitsugu Fujii, R. W. Kenney, C. T. Day, C. S. Lindsey, G. J. VanDalen, P. J. Oddone, Hirotsugu Fujii, R. R. Ross, J. Hylen, L. Madansky, D. A. Park, R. J. Madaras, Peter Nemethy, C. D. Buchanan, R. I. Koda, Nicholas John Hadley, K. A. Derby, J. A. Bakken, H. S. Kaye, M. T. Ronan, N. Toge, K. K. Kwong, H. Aihara, W. E. Slater, R. F. van Daalen Wetters, L. T. Kerth, B. Gabioud, A. Barbaro-Galtieri, A. R. Clark, J. E. Huth, T. Kamae, and A. Pevsner

Subjects
Physics, Particle physics, Annihilation, Meson, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Quark model, General Physics and Astronomy, Elementary particle, Nuclear physics, Baryon, Diquark, Pair production, High Energy Physics::Experiment, Nuclear Experiment
Abstract

We use the time-projection chamber detector to study mechanisms of baryon production in the central rapidity region of jets from e/sup +/e/sup -/ annihilation. On the basis of angular correlations between protons and antiprotons, we exclude the isotropic decay of heavy mesonic clusters as a dominant source of baryons at 95% confidence level. The diquark mechanisms used in string fragmentation models reproduce the data, provided that diquarks are formed in a two-step process which allows mesons to be produced in between the baryon and antibaryon.

Published
1985
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15. Inclusive γ and π0 production cross sections and energy fractions ine + e − annihilation at 29 GeV

Author

J. A. Bakken, J. Hylen, Hirotsugu Fujii, D. A. Park, B. A. Barnett, R. R. Kofler, L. Madansky, R. I. Koda, R. J. Madaras, William A. Wenzel, J. W. Gary, Owen Chamberlain, S. C. Loken, M. Yamauchi, P. J. Oddone, Gilbert Shapiro, M. R. Wayne, A. R. Clark, H. Iwasaki, D. R. Nygren, J. N. Marx, H. S. Kaye, J. G. Layter, H. Yamamoto, K. A. Derby, A. Pevsner, X. Q. Lu, G. Lynch, K. K. Kwong, C. S. Lindsey, Philippe Eberhard, W. Gorn, Marjorie Shapiro, J. E. Huth, M. L. Stevenson, W. M. Zhang, H. Aihara, Margaret Alston-Garnjost, R. van Tyen, A. Cordier, J. M. Hauptman, B. C. Shen, B. Gabioud, P. Nemethy, D. L. Fancher, Orin I. Dahl, Barry Blumenfeld, C. D. Buchanan, A. D. Bross, Toshitsugu Fujii, Angela Barbaro-Galtieri, E. M. Wang, W. E. Slater, M. T. Ronan, M. Pripstein, N. Toge, D. H. Stork, L. T. Kerth, R. R. Sauerwein, K. Maruyama, Hans-Uno Bengtsson, A. V. Barnes, J. A. J. Matthews, R. F. van Daalen Wetters, W. Moses, H. K. Ticho, P. R. Robrish, G. J. Van Dalen, T. Kamae, C. Y. Chien, Werner Hofmann, Ronald R. Ross, J. Chiba, S. O. Melnikoff, F. R. Rouse, C. T. Day, Robert W. Kenney, H. Videau, and N. J. Hadley

Subjects
Physics, Particle physics, Antiparticle, Annihilation, Physics and Astronomy (miscellaneous), Meson, Branching fraction, Nuclear physics, Massless particle, Pion, Antimatter, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Engineering (miscellaneous), Lepton
Abstract

Inclusive production cross sections for photons and π0's ine + e − annihilation at a center of mass energy of 29 GeV have been measured. The π0 production spectrum agrees with a corresponding measurement for π±. The ratio of the π0 inclusive rate to the average for π± is 0.92±0.14. The fractions of the total energy carried by photons and π0's are 0.244±0.016 and 0.217±0.033, respectively. The fraction of total energy carried by all stable hadrons, prompt leptons and photons is determined to be 0.938±0.045, leaving 0.062±0.045 for neutrinos.

Published
1985
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16. Limit on Majoron Emission inββDecay ofMo100

Author

Robert D. Tripp, Margaret Alston-Garnjost, Krivicich Jm, Robert W. Kenney, H. Nicholson, B. D. Dieterle, C.P. Leavitt, S. Sutton, B. L. Dougherty, and J. Kang

Subjects
Physics, Nuclear physics, Particle physics, Double beta decay, Beta particle, General Physics and Astronomy, Elementary particle, Neutrino, Beta decay, Radioactive decay, Lepton, Majoron
Abstract

We report the results of an experimental search for double-$\ensuremath{\beta}$ decay of $^{100}\mathrm{Mo}$. No evidence is found for the decay mode with majoron emission, yielding a half-life limit of 3.3\ifmmode\times\else\texttimes\fi{}${10}^{20}$ yr with 90% confidence. We also obtain a lower limit for the two-neutrino mode of 3.8\ifmmode\times\else\texttimes\fi{}${10}^{18}$ yr.

Published
1988
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17. A determination of the effective B and ϱ trajectories from the reaction π+p→ωΔ++

Author

W.F. Buhl, F.T. Somitz, Winston Ko, D.F. Grether, Angela Barbaro-Galtieri, G. Lynch, George Gidal, and Margaret Alston-Garnjost

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Pion, Bubble chamber, High Energy Physics::Experiment, Parity (physics), Nuclear Experiment
Abstract

We present results of two high-statistics bubble chamber measurements of the reaction π + → ω 0 Δ ++ at incident momenta of 2.67 and 7.1 GeV/ c . The energy dependence of the natural parity exchange projection gives a Regge trajectory consistent with the accepted ϱ trajectory. The unnatural parity exchange projection gives a B trajectory consistent with our current knowledge of the pion trajectroy.

Published
1974
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18. Charged-Hadron Inclusive Cross Sections and Fractions ine+e−Annihilation ats=29GeV

Author

A.R. Barker, D. R. Nygren, H. Yamamoto, J. G. Layter, G. E. Masek, J. M. Hauptman, S. J. Yellin, W. Moses, F. C. Erné, A. M. Eisner, F. R. Rouse, J. C. Sens, Z. R. Wolf, W. Vernon, M. Pripstein, S. Khacheryan, D. O. Caldwell, S. J. Maxfield, M. K. Sullivan, D. H. Stork, W. G.J. Langeveld, G. Cowan, J. R. Smith, Philippe Eberhard, R. R. Kofler, R. W. Kenney, B. C. Shen, A. Barbaro-Galtieri, Orin I. Dahl, D.A. Bauer, A. Lu, S. Toutounchi, Wolfgang Wagner, D. A. Crane, S. K. Park, J. Hylen, J. A. J. Matthews, T. K. Edberg, D. E. Pellett, F.L. Linde, B. D. Magnuson, A. R. Clark, G. J. Bobbink, H. P. Paar, J. S. Steinman, C. D. Buchanan, G. R. Lynch, H. Y. Chao, W.A. Wenzel, M. G. Strauss, T. Kamae, S. C. Loken, Gilbert Shapiro, Werner Hofmann, K. A. Derby, A. Bay, Y. X. Wang, Tadayuki Takahashi, M. L. Stevenson, P. J. Oddone, E. M. Wang, R. R. Ross, R. J. Madaras, Margaret Alston-Garnjost, R. van Tyen, H. S. Kaye, M. T. Ronan, K. H. Fairfield, H. Aihara, Ryoji Enomoto, E. S. Miller, K. A. Schwitkis, A. Buijs, R.E. Avery, J. J. Eastman, M. Daoudi, B. A. Barnett, L. Mathis, W. T. Lin, S. B. Chun, C. Zeitlin, and R. W. Stephens

Subjects
Nuclear physics, Physics, Particle physics, Annihilation, Hadron, General Physics and Astronomy
Published
1988
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20. Multiplicities in 100-GeV/cπ+pandppInteractions Using a Tagged Beam

Author

P. M. Yager, J. H. Klems, D. E. Pellett, Margaret Alston-Garnjost, R. L. Lander, Winston Ko, and J. Erwin

Subjects
Physics, Nuclear physics, Particle physics, General Physics and Astronomy, Multiplicity (mathematics), Charged particle
Abstract

${\ensuremath{\pi}}^{+}p$ and $\mathrm{pp}$ interactions at 100 GeV/c are studied in the National Accelerator Laboratory 30-in. bubble chamber with a tagged beam. Charged multiplicities in ${\ensuremath{\pi}}^{+}p$ and $\mathrm{pp}$ interactions are compared. The average inelastic multiplicity of ${\ensuremath{\pi}}^{+}p$ interactions is higher than for $\mathrm{pp}$ interactions (6.80 \ifmmode\pm\else\textpm\fi{} 0.14 versus 6.49 \ifmmode\pm\else\textpm\fi{} 0.10). However, negative particle multiplicities for events with more than six charged particles follow Poisson statistics with similar means, 2.56 \ifmmode\pm\else\textpm\fi{} 0.09 and 2.61 \ifmmode\pm\else\textpm\fi{} 0.08, for ${\ensuremath{\pi}}^{+}p$ and $\mathrm{pp}$ interactions.

Published
1974
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21. Quark fragmentation functions and long-range correlations ine + e ? annihilation at 29 GeV

Author

M. L. Stevenson, Ronald R. Ross, T. Fujii, R. R. Kofler, T. Kamae, K. K. Kwong, D. L. Fancher, C. S. Lindsey, D. A. Park, X. Q. Lu, M. Yamauchi, L. Madansky, R. R. Sauerwein, Owen Chamberlain, H. S. Kaye, J. A. Bakken, D. R. Nygren, J. N. Marx, N. Toge, P. Nemethy, Orin I. Dahl, Gilbert Shapiro, M. R. Wayne, Angela Barbaro-Galtieri, W. E. Slater, J. M. Hauptman, Margaret Alston-Garnjost, H. U. Bengtsson, Hiroaki Aihara, R. van Tyen, A. Cordier, Marjorie Shapiro, A. V. Barnes, B. Gabioud, W. Gorn, Philippe Eberhard, E. R. Rouse, P. R. Robrish, C. D. Buchanan, H. Fujii, B. A. Barnett, M. Pripstein, H. K. Ticho, K. Maruyama, J. Hylen, E. M. Wang, G. Lynch, L. T. Kerth, M. T. Ronan, C. Y. Chien, R. I. Koda, A. R. Clark, C. T. Day, H. Yamamoto, G. J. van Dalen, J. G. Layter, B. C. Shen, W. Moses, Robert W. Kenney, W. M. Zhang, R. J. Madaras, S. C. Loken, S. O. Melnikoff, R. F. van Daalen Wetters, B. J. Blumenfeld, J. W. Gary, K. A. Derby, A. Pevsner, N. J. Hadley, J. E. Huth, J. A. J. Matthews, D. H. Stork, William A. Wenzel, P. J. Oddone, Werner Hofmann, and A. D. Bross

Subjects
Quark, Physics, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Particle model, High Energy Physics::Lattice, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, Elementary particle, Nuclear physics, Fragmentation (mass spectrometry), Transverse momentum, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Interaction range
Abstract

We study long-range correlations between hadrons in opposite jets ine+e− annihilation events at\(\sqrt s \)=29 GeV. We use the data to measure differences between quark and antiquark fragmentation functions into charged hadrons, and to estimate the variation of fragmentation properties among quark flavors. We find large variations in longitudinal fragmentation functions, but universal mean transverse momenta of hadrons in jets.

Published
1985
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22. Neutral Particle Production inπ+pandppCollisions at 100 GeV/c

Author

Winston Ko, R. L. Lander, Margaret Alston-Garnjost, J. Erwin, J. H. Klems, P. M. Yager, and D. E. Pellett

Subjects
Nuclear physics, Physics, Particle physics, Pi, General Physics and Astronomy, Neutral particle
Abstract

Author(s): Alston-Garnjost, Margaret; Erwin, J; Klems, J.H.; Ko, W.; Lander, R.L.; Pellett, D.E.; Yager, P.M.

Published
1975
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23. Comparison of the Particle Flow inqq¯gandqq¯γEvents ine+e−Annihilation

Author

S. O. Melnikoff, A.R. Barker, R. R. van Daalen Wetters, M. Yamauchi, A. D. Bross, F.L. Linde, A. Buijs, S. J. Yellin, E. M. Wang, R. W. Kenney, R.E. Avery, W. E. Slater, Margaret Alston-Garnjost, R. van Tyen, T. Bolognese, J. S. Steinman, J. N. Marx, M. T. Ronan, K. K. Kwong, J. E. Huth, C. S. Lindsey, J. M. Hauptman, H. Aihara, D. A. Crane, Y. X. Wang, Tadayuki Takahashi, B. C. Shen, H. P. Paar, D. L. Bintinger, K. Maruyama, G. E. Masek, J. A. J. Matthews, P. J. Oddone, C. Zeitlin, T. Kamae, D.A. Bauer, D. E. Pellet, M. G. Strauss, R. R. Ross, W.A. Wenzel, R. I. Koda, Gilbert Shapiro, Philippe Eberhard, R. J. Madaras, M. S. C. Williams, B. D. Magnuson, M. L. Stevenson, H. U. Bengtsson, W. Vernon, S. J. Maxfield, J. J. Eastman, C. D. Buchanan, M. Pripstein, G. Cowan, W. G.J. Langeveld, G. J. VanDalen, X. Q. Lu, W. Moses, L. T. Kerth, D. A. Park, B. van Uitert, H. S. Kaye, Z. R. Wolf, S. C. Loken, A. Lu, M. K. Sullivan, J. Hylen, Ryoji Enomoto, G. R. Lynch, M. P. Cain, Peter Nemethy, W. Gorn, J. W. Gary, F. C. Erné, B. A. Barnett, A. M. Eisner, Werner Hofmann, Kaori Maeshima, G. J. Bobbink, A. R. Clark, Winston Ko, J. R. Smith, K. A. Derby, A. V. Barnes, D. H. Stork, K. H. Kees, J. G. Layter, W. M. Zhang, R. R. Kofler, Orin I. Dahl, Wolfgang Wagner, D. R. Nygren, Marjorie Shapiro, H. Yamamoto, F. R. Rouse, N. Toge, L. Mathis, R. R. McNeil, R. Lander, Toshitsugu Fujii, Mitchell Wayne, J. Thompson, E. S. Miller, K. A. Schwitkis, A. Barbaro-Galtieri, J. C. Sens, D. O. Caldwell, and J. T. White

Subjects
Quark, Quantum chromodynamics, Physics, Particle physics, Annihilation, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Lattice, Electron–positron annihilation, Nuclear Theory, High Energy Physics::Phenomenology, General Physics and Astronomy, Elementary particle, Jet (particle physics), Nuclear physics, Massless particle, High Energy Physics::Experiment, Event (particle physics)
Abstract

We compare the particle flow in the event plane of three-jet qq-barg (quark-antiquark-gluon) events with the particle flow in radiative annihilation events qq-bar..gamma.. (quark-antiquark-photon) for similar kinematic configurations. In the angular region between quark and antiquark jet, we find a significant decrease in particle density for qq-barg as compared to qq-bar..gamma... This effect is predicted in QCD as a result of destructive interference between soft-gluon radiation from quark, antiquark, and hard gluon.

Published
1986
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24. φ- Meson Production ine+e−Annihilations at 29 GeV

Author

W. M. Zhang, W. Moses, R. R. Kofler, J. Chiba, M. T. Ronan, K. K. Kwong, K. A. Derby, B. A. Barnett, Toshitsugu Fujii, J. N. Marx, Orin I. Dahl, H. Aihara, X. Q. Lu, D. L. Fancher, A. Pevsner, M. E. Zeller, A. Cordier, L. Madansky, R. I. Koda, H. Videau, P. R. Robrish, Mitchell Wayne, J. G. Layter, W.A. Wenzel, Gilbert Shapiro, Barry Blumenfeld, M. L. Stevenson, W. Gorn, J. W. Gary, G. J. VanDalen, Margaret Alston-Garnjost, R. van Tyen, Hirotsugu Fujii, Nicholas John Hadley, D. A. Park, Marjorie Shapiro, M. Yamauchi, B. C. Shen, Peter Nemethy, C. T. Day, C. D. Buchanan, A. D. Bross, A. V. Barnes, J. E. Huth, S. C. Loken, J. A. J. Matthews, K. Maruyama, C. S. Lindsey, G. R. Lynch, D. H. Stork, R. R. Sauerwein, R. M. Majka, H. J. Hilke, H. Yamamoto, T. Kamae, C. Y. Chien, D. R. Nygren, H. K. Ticho, J. M. Hauptman, Owen Chamberlain, Werner Hofmann, P. S. Martin, W. E. Slater, F. R. Rouse, P. J. Oddone, Philippe Eberhard, A. Barbaro-Galtieri, R. R. Ross, R. J. Madaras, N. Toge, J. Hylen, M. Pripstein, S. O. Melnikoff, R. W. Kenney, B. Gabioud, H. Iwasaki, A. R. Clark, D. H. Badtke, R. F. van Daalen Wetters, L. T. Kerth, and J. A. Bakken

Subjects
Physics, Particle physics, Annihilation, Meson, Physics::Instrumentation and Detectors, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Phi meson, Nuclear physics, Particle decay, High Energy Physics::Experiment, Boson
Abstract

Production of phi mesons in e/sup +/e/sup -/ annihilation at a center-of-mass energy of 29 GeV has been observed with the time-projection chamber detector at the PEP storage ring. The phi production rate has been measured in the energy range 0.075

Published
1984
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25. Evidence for theF*Meson

Author

J. M. Hauptman, K. A. Derby, W. Moses, H. Yamamoto, M. Yamauchi, P. R. Robrish, A. D. Bross, A. Pevsner, A. V. Barnes, D. H. Stork, F. R. Rouse, J. Chiba, R. R. Sauerwein, X. Q. Lu, J. E. Huth, Hiroaki Aihara, J. G. Layter, A. R. Clark, D. H. Badtke, J. A. Bakken, H. S. Kaye, B. A. Barnett, Marjorie Shapiro, M. T. Ronan, A. Barbaro-Galtieri, W. M. Zhang, T. Kamae, R. R. Kofler, K. K. Kwong, J. A. J. Matthews, B. Gabioud, Orin I. Dahl, M. E. Zeller, E. M. Wang, J. N. Marx, Barry Blumenfeld, Margaret Alston-Garnjost, H. Iwasaki, R. van Tyen, M. Pripstein, W. E. Slater, W.A. Wenzel, Gilbert Shapiro, B. C. Shen, J. Hylen, C. D. Buchanan, M. L. Stevenson, Owen Chamberlain, S. C. Loken, Mitchell Wayne, R. M. Majka, C. T. Day, G. J. VanDalen, R. F. van Daalen Wetters, D. R. Nygren, Hirotsugu Fujii, D. A. Park, L. T. Kerth, L. Madansky, R. I. Koda, P. S. Martin, Philippe Eberhard, Ryoji Enomoto, W. Gorn, K. Maruyama, P. J. Oddone, R. R. Ross, R. J. Madaras, H. K. Ticho, Nicholas John Hadley, N. Toge, Peter Nemethy, Toshitsugu Fujii, S. O. Melnikoff, D. L. Fancher, R. W. Kenney, G. R. Lynch, C. Y. Chien, Werner Hofmann, C. S. Lindsey, J. W. Gary, and A. Cordier

Subjects
Physics, Particle physics, Annihilation, Meson, Electron–positron annihilation, Nuclear Theory, Hadron, General Physics and Astronomy, Elementary particle, Particle identification, Nuclear physics, Pion, High Energy Physics::Experiment, Nuclear Experiment, Boson
Abstract

Evidence for a narrow state decaying into an F meson and a photon has been obtained in e/sup +/e/sup -/ annihilation events at 29 GeV c.m. energy. This state lies 139.5 +- 8.3(stat) +- 9.7(syst) MeV above the F-meson mass and is consistent with the expected F( meson. The F mesons are identified by a peak in the K/sup +/K/sup -/..pi../sup + -/ mass at 1.948 +- 0.028 +- 0.010 GeV.

Published
1984
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26. Search forQ=23eandQ=13eParticles Produced ine+e−Annihilations

Author

W.A. Wenzel, Gilbert Shapiro, Marjorie Shapiro, B. A. Barnett, M. L. Stevenson, S. O. Melnikoff, A. Cordier, J. A. Bakken, C. T. Day, C. S. Lindsey, A. Pevsner, Hirotsugu Fujii, S. C. Loken, D. A. Park, H. Yamamoto, L. Madansky, W. Moses, R. I. Koda, H. Videau, Barry Blumenfeld, K. Maruyama, R. W. Kenney, G. R. Lynch, P. R. Robrish, W. Gorn, J. W. Gary, F. R. Rouse, J. E. Huth, H. J. Hilke, H. K. Ticho, Margaret Alston-Garnjost, Nicholas John Hadley, A. Barbaro-Galtieri, T. Kamae, R. van Tyen, B. C. Shen, C. Y. Chien, M. E. Zeller, W. E. Slater, M. T. Ronan, Werner Hofmann, N. Toge, K. K. Kwong, Mitchell Wayne, H. Aihara, J. N. Marx, Peter Nemethy, J. Hylen, D. L. Fancher, P. S. Martin, G. J. Van Dalen, K. A. Derby, Philippe Eberhard, P. J. Oddone, Toshitsugu Fujii, R. R. Ross, Owen Chamberlain, R. J. Madaras, J. Chiba, C. D. Buchanan, X. Q. Lu, M. Pripstein, J. A. J. Matthews, R. M. Majka, D. R. Nygren, M. Yamauchi, A. D. Bross, J. M. Hauptman, A. V. Barnes, D. H. Stork, R. R. Sauerwein, J. G. Layter, W. M. Zhang, R. R. Kofler, R. F. van Daalen Wetters, L. T. Kerth, Orin I. Dahl, A. R. Clark, D. H. Badtke, B. Gabioud, and H. Iwasaki

Subjects
Physics, Nuclear physics, Quark, Range (particle radiation), Particle physics, Annihilation, Time projection chamber, General Physics and Astronomy, Elementary particle, Particle identification
Abstract

In a search for heavy Q = (2/3)e and Q = (1/3)e particles produced in e/sup +/e/sup -/ collisions at a center-of-mass energy of 29 GeV, no candidate events were found in 77 pb/sup -1/ of data collected by the time projection chamber at PEP. Upper limits are established on the inclusive cross section for the production of Q = (2/3)e and Q = (1/3) particles in the mass range 1--13 GeV/c/sup 2/, improving upon previously established limits.

Published
1984
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27. Observation of Strangeness Correlations ine+e−Annihilation ats=29GeV

Author

W. Moses, A. R. Clark, D. H. Badtke, N. Toge, Nicholas John Hadley, J. W. Gary, M. Pripstein, Mitchell Wayne, Marjorie Shapiro, B. C. Shen, H. U. Bengtsson, S. O. Melnikoff, Peter Nemethy, J. Chiba, C. S. Lindsey, H. Yamamoto, B. A. Barnett, S. C. Loken, J. M. Hauptman, F. R. Rouse, E. M. Wang, Owen Chamberlain, L. Madansky, R. I. Koda, H. Videau, R. F. van Daalen Wetters, L. T. Kerth, B. Gabioud, R. W. Kenney, K. Maruyama, J. N. Marx, M. Yamauchi, A. D. Bross, P. R. Robrish, A. Barbaro-Galtieri, P. S. Martin, Philippe Eberhard, A. Cordier, Margaret Alston-Garnjost, R. van Tyen, J. Hylen, X. Q. Lu, H. Iwasaki, D. L. Fancher, Toshitsugu Fujii, J. E. Huth, H. K. Ticho, G. J. VanDalen, G. R. Lynch, A. Pevsner, C. T. Day, H. J. Hilke, T. Kamae, W. M. Zhang, C. Y. Chien, Werner Hofmann, R. R. Kofler, Barry Blumenfeld, J. A. J. Matthews, Hirotsugu Fujii, D. A. Park, Orin I. Dahl, J. G. Layter, A. V. Barnes, D. H. Stork, R. R. Sauerwein, R. M. Majka, D. R. Nygren, W. Gorn, P. J. Oddone, R. R. Ross, R. J. Madaras, J. A. Bakken, C. D. Buchanan, H. S. Kaye, W.A. Wenzel, Gilbert Shapiro, M. L. Stevenson, M. T. Ronan, K. K. Kwong, H. Aihara, K. A. Derby, and W. E. Slater

Subjects
Physics, Nuclear physics, Particle physics, Annihilation, General Physics and Astronomy, Strangeness
Published
1984
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28. Observation of an anomally in the π+π− system at 980 MeV

Author

Frank T. Solmitz, Stanley M. Flatté, J.H. Friedman, S.D. Protopopescu, G. Lynch, Angela Barbaro-Galtieri, Margaret Alston-Garnjost, and M. S. Rabin

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Angular distribution, Mass distribution, Anomaly (physics), Atomic physics
Abstract

An anomaly at 980 MeV is seen in both the mass distribution and angular distribution of the π + π − system produced in the reaction π + p → Δ ++ π + π − at 7 GeV/ c . Experimental results for the related final states Δ ++ K + K − , Δ ++ π + π − π + π − and Δ ++ π + π − (neutrals) are presented.

Published
1971
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29. Asymmetry Parameter and Branching Ratio ofΣ+→pγ

Author

Angela Barbaro-Galtieri, Roger O. Bangerter, Frank T. Solmitz, Lawrence K. Gershwin, Robert D. Tripp, Margaret Alston-Garnjost, and Terry S. Mast

Subjects
Physics, Particle physics, Pion, Proton, Branching fraction, media_common.quotation_subject, General Physics and Astronomy, Hydrogen bubble, Atomic physics, Asymmetry, media_common
Abstract

An experiment to study the decay ${\ensuremath{\Sigma}}^{+}\ensuremath{\rightarrow}p\ensuremath{\gamma}$ was performed in the Berkeley 25-in. hydrogen bubble chamber. An analysis was made of 48 000 events of the type ${K}^{\ensuremath{-}}p\ensuremath{\rightarrow}{\ensuremath{\Sigma}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, ${\ensuremath{\Sigma}}^{+}\ensuremath{\rightarrow}p+\mathrm{neutral}$ with ${K}^{\ensuremath{-}}$ momenta near 400 MeV/c. The $\ensuremath{\Sigma}'\mathrm{s}$ produced in this momentum region are polarized because of the interference of the ${{Y}_{0}}^{*} (1520)$ amplitude with the background amplitudes. We have measured the proton asymmetry parameter $\ensuremath{\alpha}$ for 61 ${\ensuremath{\Sigma}}^{+}\ensuremath{\rightarrow}p\ensuremath{\gamma}$ events with an average polarization of 0.4. We found $\ensuremath{\alpha}=\ensuremath{-}{{1.03}_{\ensuremath{-}0.42}}^{+0.52}$. $\mathrm{SU}(3)$ predicts a value $\ensuremath{\alpha}=0$. A more restricted sample of events was used to determine the ${\ensuremath{\Sigma}}^{+}\ensuremath{\rightarrow}p\ensuremath{\gamma}$ branching ratio. From 31 ${\ensuremath{\Sigma}}^{+}\ensuremath{\rightarrow}p\ensuremath{\gamma}$ events and 11 670 ${\ensuremath{\Sigma}}^{+}\ensuremath{\rightarrow}p{\ensuremath{\pi}}^{0}$ events, we found $\frac{({\ensuremath{\Sigma}}^{+}\ensuremath{\rightarrow}p\ensuremath{\gamma})}{({\ensuremath{\Sigma}}^{+}\ensuremath{\rightarrow}p{\ensuremath{\pi}}^{0})}=(2.76\ifmmode\pm\else\textpm\fi{}0.51)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$. The result is in agreement with the previous measurements.

Published
1969
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30. Test of theΔS=ΔQRule in Leptonic Decays of NeutralKMesons

Author

Frank S. Crawford, Margaret Alston-Garnjost, Frank T. Solmitz, and Bryan R. Webber

Subjects
Physics, Particle physics, Meson, General Physics and Astronomy, Lepton
Abstract

We have studied the time distributions of 242 leptonic decays of neutral $K$ mesons produced in the reaction ${K}^{\ensuremath{-}}+p\ensuremath{\rightarrow}{\overline{K}}^{0}+n$. For the $\ensuremath{\Delta}S=\ensuremath{-}\ensuremath{\Delta}Q$ parameter $x$ we find $\mathrm{Re}(x)={0.22}_{\ensuremath{-}0.09}^{+0.07}$, $\mathrm{Im}(x)=\ensuremath{-}0.88\ifmmode\pm\else\textpm\fi{}0.08$.

Published
1968
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31. Branching ratios of the A2+ meson observed in 7 GeV/c π+p interactions

Author

M. S. Rabin, S.D. Protopopescu, W.F. Buhl, G. Lynch, Stanley M. Flatté, J.H. Friedman, R.L. Ott, Angela Barbaro-Galtieri, Margaret Alston-Garnjost, Frank T. Solmitz, L.D. Epperson, and Stephen E. Derenzo

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Pion, Meson, Branching fraction, Branching (polymer chemistry)
Abstract

The observed branching fractions of the A 2 + produced in the reaction π + p→A 2 + p at 7 GeV/ c and decaying to ϱπ, ηπ, K K and η′π are presented. The data show no convincing evidence for the decay A 2 + → η ′ π + , the branching fraction being less than 3%. For the other decay modes the values obtained for ϱπ, ηπ and K K are 0.744 ± 0.029, 0.183 ± 0.026 and 0.072 ± 0.012 respectively.

Published
1971
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33. Energy dependence of inclusive distributions in pion-induced reactions

Author

Stanley M. Flatté, V. P. Kenney, W. D. Shephard, K.W. Barnham, N. M. Cason, Clifford Risk, J.N. MacNaughton, J.H. Friedman, M. S. Rabin, Margaret Alston-Garnjost, D. W. Thomas, J. T. Powers, Angela Barbaro-Galtieri, N. N. Biswas, G. Lynch, and Frank T. Solmitz

Subjects
Nuclear physics, Physics, Momentum, Nuclear and High Energy Physics, Particle physics, Pion, Distribution (mathematics), Projectile, Scale invariance, Nuclear Experiment, Electric charge, Scaling
Abstract

We present data on the inclusive distributions π + p → π ± + anything and π − p → π − + anything at momenta from 3.7 to 18.5 GeV/ c . Distributions are presented in the laboratory, center-of-mass and projectile systems, and the approach to scaling is discussed.

Published
1972
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35. Experimental Test of theΔS=ΔQRule in Leptonic Decays of NeutralKMesons

Author

Bryan R. Webber, Margaret Alston-Garnjost, Frank T. Solmitz, and Frank S. Crawford

Subjects
Physics, Particle physics, Pion, Meson, Radiative decay, Time distribution, Neutrino, Lepton
Abstract

We report the final results of a study of the time distribution of decays of neutral $K$ mesons produced in the reaction ${K}^{\ensuremath{-}}+p\ensuremath{\rightarrow}{\overline{K}}^{0}+n$. We present independent results based on 81 electronic and 38 muonic decays. Combining these with 133 ambiguous events, we find for the $\ensuremath{\Delta}S=\ensuremath{-}\ensuremath{\Delta}Q$ parameter $x$ the value $\mathrm{Re}(x)={{0.25}_{\ensuremath{-}0.09}}^{+0.07}$, $\mathrm{Im}(x)=0.00\ifmmode\pm\else\textpm\fi{}0.08$. This value lies about 2.5 standard deviations away from the point $x=0$, and to this extent our experiment suggests a violation of the $\ensuremath{\Delta}S=\ensuremath{\Delta}Q$ rule. In the course of an investigation of background processes, we identify and measure the rate of the radiative decay ${K}_{S}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\gamma}$.

Published
1971
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36. Is theLa Meson?

Author

R. Windmolders, M. S. Rabin, Stanley M. Flatté, M.J. Matison, Norman M. Uyeda, Margaret Alston Garnjost, Gerald R. Lynch, Victor Waluch, J.H. Friedman, Frank T. Solmitz, Angela Barbaro-Galtieri, P. Davis, and Joseph J. Murray

Subjects
Physics, Nuclear physics, Particle physics, Meson, General Physics and Astronomy
Abstract

The Kππ enhancement at 1780 MeV (the "L meson") is copiously produced in our K+p experiment at 12 GeV/c. We show that this "meson" can be explained as a threshold enhancement in the KN(1420)π system. We see no evidence for this enhancement in channels other than KN(1420)π. © 1969 The American Physical Society.

Published
1969
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37. 51 000τ−Decays

Author

Joseph J. Murray, Frank T. Solmitz, Roger O. Bangerter, Angelo Barbaro-Galtieri, Terry S. Mast, Robert D. Tripp, Margaret Alston-Garnjost, and Lawrence K. Gershwin

Subjects
Physics, Particle physics, Pion, Distribution (number theory), Isospin, General Physics and Astronomy, Dalitz plot, Elementary particle
Published
1969
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38. Charged hadron production in e/sup /+//e/sup /-// annihilation at. sqrt. s = 29 GeV

Author

B. A. Barnett, D.A. Bauer, H.U. Bengtsson, C.D. Buchanan, Margaret Alston-Garnjost, R.E. Avery, A.R. Barker, A. Barbaro-Galtieri, G.J. Bobbink, and H. Aihara

Subjects
Physics, Nuclear physics, Particle physics, Annihilation, Meson, Quark model, Hadron, High Energy Physics::Experiment, Rapidity, Charged particle, Particle identification, Hadronization
Abstract

We have used data from the Time Projection Chamber at the SLAC storage ring PEP to study the inclusive production of charged hadrons in e/sup /+//e/sup /-// annihilation at a center of mass energy of 29 GeV. Charged particles were identified by simultaneous dEdx and momentum measurements. We present cross sections and particle fractions for ..pi../sup/plus minus//, k/sup + -/, and p(/ovr/p//) as a function of energy, momentum, rapidity, and transverse momentum. We compare the predictions of various hadronization models to the data and note discrepancies at high momentum.

Published
1988
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