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Showing papers by "Université Paris-Saclay published in 1982"

Journal Article•DOI•
Hadron production by e+e- annihilation at center-of-mass energies between 2.6 and 7.8 GeV. I. Total cross section, multiplicities, and inclusive momentum distributions

[...]

James L. Siegrist1, James L. Siegrist2, Roy F Schwitters1, Roy F Schwitters3, M. S. Alam1, M. S. Alam4, A. M. Boyarski1, Martin Breidenbach1, F. Bulos1, J. T. Dakin5, J. T. Dakin1, J. Dorfan1, G. J. Feldman1, D. Fryberger1, G. Hanson1, J. A. Jaros1, B. Jean-Marie1, R. R. Larsen1, V. Luth1, H. L. Lynch1, H. L. Lynch6, D. Lyon1, C. C. Morehouse1, C. C. Morehouse7, M. L. Perl1, I. Peruzzi1, M. Piccolo1, T. P. Pun8, T. P. Pun1, P. A. Rapidis9, P. A. Rapidis1, Burton Richter1, Rafe Schindler1, Rafe Schindler2, W. Tanenbaum10, W. Tanenbaum1, F. Vannucci11, F. Vannucci1, W. Chinowsky8, G. S. Abrams8, D. Briggs6, D. Briggs8, William Carithers8, S. Cooper8, R. DeVoe12, R. DeVoe8, C. E. Friedberg8, G. Goldhaber8, R. J. Hollebeek13, R. J. Hollebeek1, A. D. Johnson8, J. A. Kadyk8, A. M. Litke8, A. M. Litke1, R. J. Madaras8, H. K. Nguyen14, H. K. Nguyen8, F. M. Pierre15, F. M. Pierre13, B. Sadoulet2, B. Sadoulet8, G. H. Trilling8, J. S. Whitaker16, J. S. Whitaker8, James E Wiss13, James E Wiss17 •
Stanford University1, CERN2, Harvard University3, Vanderbilt University4, General Electric5, University of California, Santa Barbara6, Hewlett-Packard7, Lawrence Berkeley National Laboratory8, Fermilab9, Alcatel-Lucent10, University of Paris11, IBM12, University of California, Berkeley13, Pierre-and-Marie-Curie University14, Université Paris-Saclay15, Massachusetts Institute of Technology16, University of Illinois at Urbana–Champaign17
01 Sep 1982-Physical Review D
TL;DR: In this article, the authors measured multihadron production in e+e− annihilation at center-of-mass energies between 2.6 and 7.8 GeV and found that the total hadronic cross section was approximately 2.7 times the cross section for the production of muon pairs at c.m.
Abstract: Measurements of multihadron production in e+e− annihilation at center-of-mass energies between 2.6 and 7.8 GeV are presented. Aside from the narrow resonances ψ(3095) and ψ(3684), the total hadronic cross section is found to be approximately 2.7 times the cross section for the production of muon pairs at c.m. energies below 3.7 GeV and 4.3 times the muon-pair cross section at c.m. energies above 5.5 GeV. Complicated structure is found at intermediate energies. Charged-particle multiplicities and inclusive momentum distributions are presented.

87 citations

Journal Article•DOI•
Observation of semileptonic decays of charmed baryons

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E. Vella1, E. Vella2, G. H. Trilling1, G. H. Trilling2, G. S. Abrams2, G. S. Abrams1, M. S. Alam1, M. S. Alam3, M. S. Alam2, C. A. Blocker1, C. A. Blocker4, C. A. Blocker2, A. Blondel2, A. Blondel1, A. M. Boyarski1, A. M. Boyarski2, Martin Breidenbach2, Martin Breidenbach1, D. L. Burke2, D. L. Burke1, W. C. Carithers1, W. C. Carithers2, W. Chinowsky2, W. Chinowsky1, M. W. Coles1, M. W. Coles2, M. W. Coles5, S. Cooper1, S. Cooper2, W. E. Dieterle1, J. B. Dillon1, J. Dorenbosch6, J. Dorenbosch2, J. Dorenbosch1, J. Dorfan2, J. Dorfan1, M. W. Eaton1, M. W. Eaton2, G. J. Feldman2, G. J. Feldman1, M. E. B. Franklin1, M. E. B. Franklin2, G. Gidal2, G. Gidal1, G. Goldhaber1, G. Goldhaber2, G. Hanson2, G. Hanson1, Kenneth G. Hayes2, Kenneth G. Hayes1, Kenneth G. Hayes6, T. Himel1, T. Himel2, T. Himel6, D. G. Hitlin1, D. G. Hitlin7, D. G. Hitlin2, R. J. Hollebeek2, R. J. Hollebeek1, Walter R. Innes2, Walter R. Innes1, J. A. Jaros1, J. A. Jaros2, P. Jenni2, P. Jenni1, P. Jenni6, A. D. Johnson1, A. D. Johnson2, J. A. Kadyk1, J. A. Kadyk2, A. J. Lankford1, A. J. Lankford2, R. R. Larsen2, R. R. Larsen1, V. Luth1, V. Luth2, R. E. Millikan1, R. E. Millikan2, Mark E. Nelson1, Mark E. Nelson2, C. Y. Pang2, C. Y. Pang1, J. F. Patrick2, J. F. Patrick1, M. L. Perl1, M. L. Perl2, Burton Richter2, Burton Richter1, A. Roussarie2, A. Roussarie1, A. Roussarie8, D. L. Scharre1, D. L. Scharre2, Rafe Schindler6, Rafe Schindler1, Rafe Schindler2, Roy F Schwitters, J. L. Siegrist2, J. L. Siegrist6, J. L. Siegrist1, J. Strait1, J. Strait2, H. Taureg2, H. Taureg6, H. Taureg1, M. Tonutti1, M. Tonutti9, M. Tonutti2, R. A. Vidal2, R. A. Vidal1, I. Videau2, I. Videau1, I. Videau7, J. M. Weiss1, J. M. Weiss2, H. Zaccone1, H. Zaccone2, H. Zaccone8 •
Stanford University1, Lawrence Berkeley National Laboratory2, Vanderbilt University3, Harvard University4, Carnegie Mellon University5, CERN6, California Institute of Technology7, Université Paris-Saclay8, University of Bonn9
31 May 1982-Physical Review Letters
TL;DR: In this article, direct electrons are observed in baryon events produced in e/sup +/e/sup -/ annihilation at center-of-mass energies above the Lambda-bar/sub c/ threshold.
Abstract: Direct electrons are observed in baryon events produced in e/sup +/e/sup -/ annihilation at center-of-mass energies above the ..lambda../sub c/Lambda-bar/sub c/ threshold. These events are attributed to charmed baryon pair production and subsequent ..lambda../sub c/ semileptonic decay. Various semileptonic branching ratios of the ..lambda../sub c/ are determined, including BR(..lambda../sub c/..-->..e/sup +/X) = (4.5 +- 1.7)%.

24 citations

Journal Article•DOI•
D-meson production in e+e- annihilation at Ec.m. between 3.8 and 6.7 GeV

[...]

M. W. Coles1, M. W. Coles2, G. S. Abrams1, C. A. Blocker1, C. A. Blocker3, A. Blondel1, W. C. Carithers1, William Chinowsky1, S. Cooper1, W. E. Dieterle1, J. B. Dillon1, M. W. Eaton1, George Gidal1, Gerson Goldhaber1, A. D. Johnson1, J. A. Kadyk1, A. J. Lankford1, R. E. Millikan1, Mark E. Nelson1, C. Y. Pang1, J. F. Patrick1, J. Strait1, George H. Trilling1, E. N. Vella1, I. Videau1, M. S. Alam4, M. S. Alam5, A. M. Boyarski5, Martin Breidenbach5, D. L. Burke5, J. Dorenbosch5, J. Dorenbosch6, J. Dorfan5, G. J. Feldman5, M. E. B. Franklin5, G. Hanson5, K. A. Hayes5, K. A. Hayes6, T. Himel6, T. Himel5, D. G. Hitlin5, D. G. Hitlin7, R. J. Hollebeek5, Walter R. Innes5, J. A. Jaros5, P. Jenni5, P. Jenni6, R. R. Larsen5, V. Luth5, M. L. Perl5, Burton Richter5, A. Roussarie8, A. Roussarie5, D. L. Scharre5, Rafe Schindler5, Rafe Schindler6, R. F. Schwitters, J. L. Siegrist5, H. Taureg5, H. Taureg6, M. Tonutti9, M. Tonutti5, R. A. Vidal5, J. M. Weiss5, H. Zaccone8, H. Zaccone5 •
University of California, Berkeley1, Carnegie Mellon University2, Harvard University3, Vanderbilt University4, Stanford University5, CERN6, California Institute of Technology7, Université Paris-Saclay8, University of Bonn9
01 Jan 1982-Physical Review D
TL;DR: The Mark II detector at SPEAR has been used to study D-meson production in e+e- annihilation at center-of-mass energies between 3.8 and 6.7 GeV as mentioned in this paper.
Abstract: The Mark II detector at SPEAR has been used to study D-meson production in e+e- annihilation at center-of-mass energies between 3.8 and 6.7 GeV. The neutral and charged D mesons are identified from their K and K decay modes. Measurements of RD and of the inclusive differential cross section s ddz are presented. The quasi-two-body cross sections DD, D*D, and D*D* are derived from an overall fit to the D recoil spectra. No evidence was found for the associated production of charmed mesons and charmed baryons. © 1982 The American Physical Society.

14 citations