I. Schulz | Researchain

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Physical Review Letters | 1983

Experimental Study of Inclusive Muon Spectra at PETRA

B. Adeva; Q. Z. Li; D. G. Fong; U. Becker; R.R. Rau; Samuel C.C. Ting; H.G. Wu; H.W. Tang; K. Sinram; H.S. Fesefeldt; B. Zhou; M. Steuer; G. Herten; S. Wu; B. Wyslouch; P. Kuijer; H. Rykaczewski; P. Duinker; J. P. Revol; M. J. White; M.Y. Chen; H. B. Newman; M.A. Marquina; M. Wang; C.C. Chang; F.P. Poschmann; H. S. Chen; Z. Y. Feng; I. Schulz; G.M. Swider

The results of a high-statistics study of inclusive muon spectra at PETRA are reported. Improved mass limits have been obtained for heavy quarks, heavy leptons, and charged Higgs particles. It is shown that the fragmentation properties of b quarks and c quarks are different, with the mean fragmentation variables = 0.75 +- 0.03 +- 0.06, = 0.46 +- 0.02 +- 0.05 and the average semileptonic branching ratio for the B and C hadrons BR(B) = (10.5 +- 1.5 +- 1.3)%, BR(C) = (11.5 +- 1.0 +- 1.7)%.

Physics Letters B | 1982

Search for Charged Higgs, Scalar Taus, and a Test of Technicolor Models

B. Adeva; D. P. Barber; U. Becker; J. Berdugo; G. Berghoff; A. Böhm; J. G. Branson; J.D. Burger; M. Capell; M. Cerrada; C.C. Chang; H. S. Chen; M. Chen; M. L. Chen; M.Y. Chen; R. Clare; E. Deffur; P. Duinker; Z. Y. Feng; H.S. Fesefeldt; D. G. Fong; M. Fukushima; D. Harting; T. Hebbeker; G. Herten; M.C. Ho; M.M. Ilyas; D.Z. Jiang; D. Kooijman; W. Krenz

Abstract We have used our measurements of final states from e+e− containing an isolated muon and a hadronic or electron shower to search for new spin 0 charged particles. We exclude (95% CL) a supersymmetric partner of the τ with a mass less than 14 GeV/c2. We obtain upper limits on the branching ratio to τvτ for charged Higgs particles or technipions with masses up to 14 GeV/c2. This disagrees with some technicolor model predictions.

Physical Review Letters | 1983

EXPERIMENTAL-STUDY OF INCLUSIVE MUON SPECTRA FROM ELECTRON-POSITRON COLLISIONS IN THE ENERGY REGION 33 LESS-THAN-OR-EQUAL-TO SQUARE-ROOT-S LESS-THAN-EQUAL-TO 38.54 GEV

B. Adeva; D. P. Barber; U. Becker; J. Berdugo; G. Berghoff; A. Boehm; Jg Branson; Jd Burger; M. Capell; M. Cerrada; C. C. Chang; Hs Chen; Mingshui Chen; M. L. Chen; M. Chen; Y. S. Chu; R. Clare; E. Deffur; M. Demarteau; P. Duinker; Z. Y. Feng; H.S. Fesefeldt; D. G. Fong; M. Fukushima; D. Harting; T. Hebbeker; G. Herten; M.C. Ho; M.M. Ilyas; D.Z. Jiang

Physical Review Letters | 1983

MODEL-INDEPENDENT 2ND-ORDER DETERMINATION OF THE STRONG-COUPLING CONSTANT-ALPHA-S

B. Adeva; D. P. Barber; U. Becker; J. Berdugo; G. Berghoff; A. Böhm; J. G. Branson; J.D. Burger; M. Capell; M. Cerrada; C.C. Chang; H. S. Chen; M. Chen; M. L. Chen; M.Y. Chen; Y. S. Chu; R. Clare; E. Deffur; M. Demarteau; P. Duinker; Z. Y. Feng; H.S. Fesefeldt; D. G. Fong; M. Fukushima; D. Harting; T. Hebbeker; G. Herten; M.C. Ho; M.M. Ilyas; D.Z. Jiang

Physics Reports | 1984

A summary of experimental results from Mark J: High energy e+e- collisions at PETRA

B. Adeva; D. P. Barber; U. Becker; J. Berdugo; A. Böhm; J. G. Branson; J.D. Burger; M. Capell; M. Cerrada; H. S. Chen; M. Chen; M. L. Chen; M.Y. Chen; Y. S. Chu; R. Clare; E. Deffur; M. Demarteau; P. Duinker; H.S. Fesefeldt; D. G. Fong; M. Fukushima; R.D. Han; D. Harting; T. Hebbeker; G. Herten; M.C. Ho; M. Hussain; M.M. Ilyas; D.Z. Jiang; W. Krenz

Physical Review Letters | 1980

Experimental Study of Heavy Charged Leptons and Search for Scalar Partners of Muons at PETRA (12 GeV<~Ec.m.<~36.7 GeV)

D. P. Barber; U. Becker; G. D. Bei; G. Berghoff; A. Boehm; J. G. Branson; J. Bron; D. Buikman; J.D. Burger; M. Capell; C. C. Chang; H. S. Chen; M. Chen; C.P. Cheng; Y. S. Chu; R. Clare; P. Duinker; G.Y. Fang; Z. Y. Feng; H.S. Fesefeldt; D. Fong; M. Fukushima; J.C. Guo; A. Hariri; G. Herten; M.C. Ho; T.T. Hsu; D.Z. Jiang; R.W. Kadel; W. Krenz

Physical Review Letters | 1983

SEARCH FOR TOP QUARK AND A TEST OF MODELS WITHOUT TOP QUARK UP TO 38.54 GEV AT PETRA

Physical Review Letters | 1984

SEARCH FOR NEW PARTICLES IN E+E- ANNIHILATION FROM 39.79 TO 45.52 GEV

B. Adeva; D. P. Barber; U. Becker; J. Berdugo; A. Boehm; J. G. Branson; J.D. Burger; M. Capell; M. Cerrada; H. S. Chen; M. Chen; M. L. Chen; M.Y. Chen; Y. S. Chu; E. Deffur; M. Demarteau; B.Z. Dong; P. Duinker; H.S. Fesefeldt; D. G. Fong; M. Fukushima; R.D. Han; D. Harting; T. Hebbeker; G. Herten; M. Hussain; M.M. Ilyas; C. H. Jiang; D.Z. Jiang; W. Krenz

Physical Review Letters | 1981

Experimental study of electroweak parameters at PETRA energies (12< or =E/sub c. m. /< or =36. 7 GeV)

D. P. Barber; U. Becker; G. D. Bei; G. Berghoff; A. Boehm; J. G. Branson; J. Bron; D. Buikman; J.D. Burger; M. Capell; C.C. Chang; G.F. Chen; H. S. Chen; M. Chen; C.P. Cheng; Y. S. Chu; R. Clare; P. Duinker; G.Y. Fang; Z. Y. Feng; H.S. Fesefeldt; D. Fong; M. Fukushima; J.C. Guo; A. Hariri; D. Harting; G. Herten; M.C. Ho; T.T. Hsu; M.M. Ilyas

Physical Review Letters | 1982

Measurement of

B. Adeva; D. P. Barber; U. Becker; J. Berdugo; G. Berghoff; A. Böhm; J. G. Branson; J.D. Burger; M. Capell; M. Cerrada; C.C. Chang; H. S. Chen; M. Chen; M. L. Chen; M.Y. Chen; C.P. Cheng; R. Clare; E. Deffur; P. Duinker; Z. Y. Feng; H.S. Fesefeldt; D. G. Fong; M. Fukushima; D. Harting; T. Hebbeker; G. Herten; M.C. Ho; M.M. Ilyas; D.Z. Jiang; D. Kooijman

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