M. Capell
Massachusetts Institute of Technology
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Publication
Featured researches published by M. Capell.
Physics Letters B | 1985
B. Adeva; U. Becker; R. Becker-Szendy; J. Berdugo; A. Böhm; J. G. Branson; J.D. Burger; M. Capell; M. Cerrada; C.C. Chang; Y. H. Chang; H. S. Chen; M. Chen; M. L. Chen; M.Y. Chen; E. Deffur; M. Demarteau; B.Z. Dong; P. Duinker; H.S. Fesefeldt; D. G. Fong; M. Fukushima; L. Garrido; R.D. Han; D. Harting; G. Herten; M.C. Ho; D. Hüser; M. Hussain; M.M. Ilyas
Abstract PETRA, the e + e − collider, has operated at a maximum CM energy of 46.78 GeV. We update our previous results on new particle searches and set significantly better mass limits on some.
Physical Review Letters | 1983
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
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.
Physics Letters B | 1993
O. Adriani; M. Aguilar-Benitez; S. P. Ahlen; J. Alcaraz; A. Aloisio; G. Alverson; M. G. Alviggi; G. Ambrosi; Q. An; H. Anderhub; A.L. Anderson; V. Andreev; L. Antonov; D. Antreasyan; P. Arce; A. Arefiev; A. Atamanchuk; T. Azemoon; T. Aziz; P.V.K.S. Baba; S. Bachmann; P. Bagnaia; J.A. Bakken; L. Baksay; R.C. Ball; S. Banerjee; J. Bao; R. Barillère; Luciano Barone; A. Baschirotto
We report a measurement of R b = Γ bb Γ had from Z → qq events at LEP. View the Z → qq events are identified using a multidimensional analysis based on a neural network approach. We obtain 60% sample purity with an efficiency of 35%. Our measured value of R b is 0.222±0.003±0.007.
Physical Review Letters | 1983
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
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)%.
Physical Review Letters | 2014
L. Accardo; M. Aguilar; D. Aisa; B. Alpat; A. Alvino; G. Ambrosi; K. Andeen; L. Arruda; N. Attig; P. Azzarello; A. Bachlechner; F. Barao; A. Barrau; L. Barrin; A. Bartoloni; L. Basara; M. Battarbee; R. Battiston; J. Bazo; U. Becker; M. Behlmann; B. Beischer; J. Berdugo; B. Bertucci; G. Bigongiari; V. Bindi; S. Bizzaglia; M. Bizzarri; G. Boella; K. Bollweg
Physical Review Letters | 1983
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
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
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
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
