G. Medin
Ministry of Science and Technology
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Featured researches published by G. Medin.
Physics Letters B | 2000
H. Albrecht; T. Hamacher; R. P. Hofmann; T. Kirchhoff; R. Mankel; A. Nau; S. Nowak; D. Reßing; H. Schröder; H. Schulz; M. Walter; R. Wurth; C. Hast; H. Kapitza; H. Kolanoski; A. Kosche; A. Lange; A. Lindner; M. Schieber; T. Siegmund; H. Thurn; D. Töpfer; D. Wegener; C. Frankl; J. Graf; M. Schmidtler; M. Schramm; Klaus R. Schubert; R. Schwierz; B. Spaan
Abstract Using the ARGUS detector at the e+e− storage ring DORIS II, we have searched for the real and imaginary part of the electric dipole formfactor dτ of the τ lepton in the production of τ pairs at q 2 =100 GeV 2 . This is the first direct measurement of this CP violating formfactor. We applied the method of optimised observables which takes into account all available information on the observed τ decay products. No evidence for CP violation was found, and we derive the following results: Re (d τ )=(1.6±1.9)·10 −16 e cm and Im (d τ )=(−0.2±0.8)·10 −16 e cm , where statistical and systematic errors have been combined.
Physics Letters B | 1998
H. Albrecht; T. Hamacher; R. P. Hofmann; T. Kirchhoff; R. Mankel; A. Nau; S. Nowak; D. Reßing; H. Schröder; H. Schulz; M. Walter; R. Wurth; C. Hast; H. Kapitza; H. Kolanoski; A. Kosche; A. Lange; A. Lindner; M. Schieber; T. Siegmund; H. Thurn; D. Töpfer; D. Wegener; C. Frankl; J. Graf; M. Schmidtler; M. Schramm; K. R. Schubert; R. Schwierz; B. Spaan
Abstract Using the ARGUS detector at the e + e − storage ring DORIS II, we have measured the Michel parameters ρ , ξ , and ξδ for τ ± →l ± ν ν decays in τ -pair events produced at center of mass energies in the region of the ϒ resonances. Using τ ∓ → ρ ∓ ν as spin analyzing tags, we find ρ e =0.68±0.04±0.08, ξ e =1.12±0.20±0.09, ξδ e =0.57±0.14±0.07, ρ μ =0.69±0.06±0.08, ξ μ =1.25±0.27±0.14 and ξδ μ =0.72±0.18±0.10. In addition, we report the combined ARGUS results on ρ , ξ , and ξδ using this work und previous measurements.Using the ARGUS detector at the
Physics Letters B | 1997
H. Albrecht; S. Weseler; R. Schwierz; H. Kuipers; I. Korolko; T.-S. Yoon; L. Gershtein; O. Mai; I. Belyaev; H. Kapitza; K. Reim; R. Mundt; W. Hofmann; R. Eckmann; P. Krizan; H. Thurn; C. Hast; J. Stiewe; Klaus R. Schubert; R. Wurth; G. Medin; C. Frankl; T. Zivko; A. Lindner; B. Spaan; M. Schmidtler; M. Schieber; K. Tzamariudaki; A. Golutvin; M. Walter
e^+ e^-
Archive | 2008
I. Abt; Mark Raymond Adams; H. Albrecht; A. Aleksandrov; A. Amorim; S. Aplin; V. Aushev; Yu. Sh. Bagaturia; V. Balagura; M. Bargiotti; O. Barsukova; C. Bauer; S. Bauer; A. Belkov; A. Bertin; B. Bobchenko; A. Bogatyrev; G. Bohm; M. Bruinsma; M. Bruschi; M. Buchler; T. Buran; P. Conde; C. Cruse; M. Dam; K. M. Danielsen; M. Danilov; S. De Castro; H. Deppe; X. Dong
storage ring DORIS II, we have measured the Michel parameters
Archive | 2006
I. Abt; Mark Raymond Adams; A. Aleksandrov; Yu. Sh. Bagaturia; M. Bargiotti; C. Bauer; S. Bauer; I. Belotelov; B. Bobchenko; A. Bogatyrev; G. Bohm; M. Bruinsma; M. Bruschi; P. Buchholz; P. Conde; M. Dam; M. Danilov; H. Deppe; V. Egorytchev; K. Ehret; F. Eisele; P. Faccioli; M. Feuerstack-Raible; J. Flammer; B. Fominykh; M. Funcke; A. Gellrich; B. Giacobbe; D. Goloubkov; Yu. A. Golubkov
\rho
Archive | 2003
H. Albrecht; S. Bauer; M. Beck; A. Belkov; K. Berkhan; G. Bohm; M. Bruinsma; T. Buran; M. Capeans; Baoyi Chen; H. Deckers; K. Dehmelt; X. Dong; R. Eckmann; D. Emelianov; I. Golutvin; M. Hohlmann; W. Hulsbergen; Y. Jia; C. Jiang; H. Kapitza; S. Karabekyan; Z. Ke; Y. Kiryushin; H. Kolanoski; S. Korpar; P. Kri; A. Lanyov; Yunpeng Liu; T. Lohse
,
Physics Letters B | 1998
H. Albrecht; T. Hamacher; R. P. Hofmann; Th. Kirchhoff; R. Mankel; A. Nau; S. Nowak; D. Ressing; Henning Schroder; H. Schulz; Mark Walter; R. Wurth; C. Hast; H. Kapitza; H. Kolanoski; A. Kosche; Andrew E. Lange; A. Lindner; M. Schieber; T. Siegmund; H. Thurn; D. Töpfer; D. Wegener; C. Frankl; J. Graf; M. Schmidtler; M. Schramm; Klaus R. Schubert; R. Schwierz; B. Spaan
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Physics Letters B | 1997
H. Albrecht; T. Hamacher; R. P. Hofmann; Th. Kirchhoff; R. Mankel; A. Nau; S. Nowak; D. Ressing; Henning Schroder; H. Schulz; Mark Walter; R. Wurth; C. Hast; H. Kapitza; H. Kolanoski; A. Kosche; Andrew E. Lange; A. Lindner; M. Schieber; T. Siegmund; H. Thurn; D. Töpfer; D. Wegener; C. Frankl; J. Graf; M. Schmidtler; M. Schramm; Klaus R. Schubert; R. Schwierz; B. Spaan
, and
Physics Letters B | 1997
H. Albrecht; T. Hamacher; R. P. Hofmann; Th. Kirchhoff; R. Mankel; A. Nau; S. Nowak; D. Ressing; Henning Schroder; H. Schulz; Mark Walter; R. Wurth; C. Hast; H. Kapitza; H. Kolanoski; A. Kosche; Andrew E. Lange; A. Lindner; M. Schieber; T. Siegmund; H. Thurn; D. Töpfer; D. Wegener; C. Frankl; J. Graf; M. Schmidtler; M. Schramm; Klaus R. Schubert; R. Schwierz; B. Spaan
\xi\delta
European Physical Journal C | 1996
H. Albrecht; T. Hamacher; Herbert Hofmann; T. Kirchhoff; Rainer Mankel; A. Nau; Stefanie Nowak; D. Ressing; Henning Schroder; H. Schulz; Michael Faivre Walter; R. Wurth; C. Hast; H. Kapitza; H. Kolanoski; A. Kosche; A. de Lange; Alexander Lindner; M. Schieber; T. Siegmund; H. Thurn; D. Töpfer; D. Wegener; C. Frankl; J. Graf; M. Schmidtler; M. Schramm; Klaus R. Schubert; R. Schwierz; B. Spaan
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