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11 results on '"A.W. Nilsson"'

1. Search for b→sX+X− in exclusive decays of B mesons

Author

S. Khan, T. Ruf, A. Drescher, H. Scheck, U. Volland, John D. Spengler, M. Reidenbach, A. Semenov, J. C. Gabriel, B. Holzer, G. Schweda, Robert K. Kutschke, T. S. Yoon, H. Albrecht, R. Wurth, P. M. Patel, J. Stiewe, Mikhail Danilov, P. Križan, A. Golutvin, H. Schröder, D. Wegener, A. Linder, A.W. Nilsson, K. W. Edwards, H. Wegener, B. Fominykh, A. Hölscher, R. Gläser, V. Soloshenko, Werner Hofmann, C. Geyer, C. Hast, Yu. Zaitsev, S. Werner, Stefan Schael, A. Lange, J. A. Parsons, H. Kapitza, R. S. Orr, R. Waldi, F. Sefkow, R. Childers, V. Shevchenko, B. Boštjančič, A. Walther, R. Davis, Manfred Paulini, E. Križnič, I. Tichomirov, A. Krüger, William R. Frisken, A. Rostovtsev, A. Nippe, D. B. Macfarlane, S. Weseler, B. Spaan, W. Funk, Sergey Semenov, G. Kernel, G. Tsipolitis, Hermann Kolanoski, Sally Seidel, Anton Babaev, G. Harder, V. Tchistilin, C. E. K. Charlesworth, Leif J. Jönsson, P. Krieger, Holger Schulz, I. V. Gorelov, S. Ball, T. Oest, J. D. Prentice, G. Herrera, K. Reim, Rainer Mankel, V. Lubimov, W. Schmidt-Parzefall, C. W. Darden, K. R. Schubert, M. Pleško, R. D. Appuhn, K. W. McLean, K. Strahl, J. D. Swain, M. Schäfer, and H. I. Cronström

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Argus, High Energy Physics::Lattice, Electron–positron annihilation, High Energy Physics::Phenomenology, DESY, Standard Model, Nuclear physics, Higgs boson, High Energy Physics::Experiment, B meson, computer, Storage ring, computer.programming_language
Abstract

Using the ARGUS detector at the e + e − storage ring DORIS II at DESY, penguin decays of B mesons involving b→sX + X − have been searched for, where X is one of e, μ , π , or K. No evidence for these decays was found and upoer limits are quoted. These numbers represent important constraints of flavour-changing neutral currents in B meson decays and probe the heavy-quark and Higgs sectors of the standard model.

Published
1991

2. Search for b→s.gluon in B meson decays

Author

A.W. Nilsson, V. Lubimov, A. Semenov, J. C. Gabriel, J. Stiewe, E. Križnič, W. Schmidt-Parzefall, Sergey Semenov, William R. Frisken, R. Childers, Anton Babaev, G. Tsipolitis, C. W. Darden, Hermann Kolanoski, A. Nippe, D. B. Macfarlane, B. Boštjančič, H. I. Cronström, K. W. Edwards, C. Geyer, C. Hast, T. S. Yoon, D. Wegener, U. Volland, A. Lange, J. D. Swain, K. W. McLean, R. S. Orr, C. E. K. Charlesworth, G. Kernel, K. Strahl, A. Lindner, V. Tchistilin, Robert K. Kutschke, T. Ruf, H. Schröder, R. Gläser, P. Križan, A. Golutvin, K. R. Schubert, I. V. Gorelov, S. Ball, A. Hölscher, S. Khan, V. Shevchenko, A. Drescher, V. Soloshenko, I. Tichomirov, M. Pleško, Manfred Paulini, B. Holzer, G. Schweda, R. Waldi, Stefan Schael, G. Herrera, J. A. Parsons, H. Kapitza, R. D. Appuhn, A. Walther, R. Davis, Mikhail Danilov, A. Krüger, B. Fominykh, Werner Hofmann, Leif J. Jönsson, M. Reidenbach, M. Schäfer, S. Werner, T. Oest, J. D. Prentice, H. Scheck, H. Wegener, John D. Spengler, H. Albrecht, R. Wurth, F. Sefkow, A. Rostovtsev, B. Spaan, W. Funk, G. Harder, P. M. Patel, P. Krieger, Yu. Zaitsev, Sally Seidel, Holger Schulz, K. Reim, Rainer Mankel, and S. Weseler

Subjects
Physics, Nuclear and High Energy Physics, Argus, Particle physics, Physics::Instrumentation and Detectors, High Energy Physics::Lattice, Electron–positron annihilation, High Energy Physics::Phenomenology, DESY, Gluon, Nuclear physics, High Energy Physics::Experiment, B meson, computer, Storage ring, computer.programming_language
Abstract

Using the ARGUS detector at the e + e − storage ring DORIS II at DESY, a search for penguin decays of B mesons involving b→s gluon has been performed. No evidence for the penguin mechanism was found and a number of upper limits are quoted.

Published
1991

3. Study of antideuteron production in e+ e− annihilation at 10 GeV centre-of-mass energy

Author

A.W. Nilsson, B. Spaan, W. Funk, G. Herrera, Mikhail Danilov, E. Križnič, R. Childers, B. Fominykh, P. M. Patel, Yu. Zaitsev, B. Holzer, Manfred Paulini, William R. Frisken, J. D. Swain, A. Nippe, A. Krüger, Leif J. Jönsson, S. Weseler, U. Volland, D. B. Macfarlane, K. W. McLean, A. Lindner, A. Semenov, Werner Hofmann, K. W. Edwards, S. Khan, G. Schweda, K. Strahl, V. Shevchenko, K. R. Schubert, T. Oest, C. E. K. Charlesworth, R. Gläser, J. C. Gabriel, I. Tichomirov, J. Spengler, Stefan Schael, H. I. Cronström, J. A. Parsons, V. Lubimov, H. Kapitza, T. S. Yoon, A. Rostovtsev, T. Ruf, H. Wegener, K. Reim, V. Soloshenko, W. Schmidt-Parzefall, S. Ball, G. Kernel, Sally Seidel, Anton Babaev, C. W. Darden, Sergey Semenov, G. Tsipolitis, C. Geyer, C. Hast, H. Schröder, V. Tchistilin, Holger Schulz, A. Drescher, Rainer Mankel, Hermann Kolanoski, A. Lange, M. Reidenbach, F. Sefkow, A. Walther, R. Davis, R. S. Orr, M. Pleško, B. Boštjančič, Robert K. Kutschke, P. Križan, A. Golutvin, R. D. Appuhn, A. Hölscher, M. Schäfer, H. Scheck, I. V. Gorelov, H. Albrecht, J. Stiewe, R. Wurth, G. Harder, P. Krieger, R. Waldi, J. D. Prentice, D. Wegener, and S. Werner

Subjects
Physics, Nuclear and High Energy Physics, Argus, Particle physics, Annihilation, Electron–positron annihilation, Hadron, Elementary particle, Nuclear physics, Antiproton, computer, Storage ring, computer.programming_language, Production rate
Abstract

We report a measurement of the production of antideuterons d in e+e− annihilation at centre-of-mass energies around 10 GeV using the ARGUS detector at the DORIS II storage ring. We observe an enhancement of d production in direct hadronic ϒ(1S) and ϒ(2S) resonance decays. From 21 events width a d candidate the inclusive cross section 1σdirhad · dσdp and the production rate of antideuterons are determined. A production rate of (6.0±2.0±0.6) × 10-5d per direct hadronic ϒ decay and a 90% CL upper limit of 1.7 × 10−5d per e+e−→qq continuum event are obtained. These results are related to antiproton production through a simple model.

Published
1990

4. Observation of Δ(1232)++ production in e+e− annihilations around 10 GeV

Author

S. Werner, Mikhail Danilov, V. Lubimov, V. Soloshenko, S. Weseler, W. Schmidt-Parzefall, B. Fominykh, R. S. Orr, C. W. Darden, A. Drescher, C. Hast, D. Wegener, A.W. Nilsson, V. Shevchenko, K. W. Edwards, U. Volland, Stefan Schael, Anton Babaev, Werner Hofmann, I. Tichomirov, A. Rostovtsev, A. Lange, T. S. Yoon, G. Schweda, Leif J. Jönsson, Sergey Semenov, C. E. K. Charlesworth, J. A. Parsons, H. Kapitza, J. Stiewe, R. Davis, Hermann Kolanoski, K. W. McLean, S. Ball, K. Strahl, R. Waldi, Robert K. Kutschke, T. Oest, A. Golutvin, P. Krizˇan, Manfred Paulini, A. Semenov, M. Reidenbach, J. C. Gabriel, A. Hölscher, Wr Frisken, Holger Schulz, R. D. Appuhn, G. Herrera, H. Wegener, S. Khan, E. Krizˇnicˇ, D. B. MacFarlane, A. Krüger, A. Lindner, R. Childers, B. Bosˇtjancˇicˇ, Sally C Seidel, H. I. Cronström, H. Scheck, M. Schäfer, A. Nippe, R. Gläser, J. D. Prentice, John D. Spengler, N. Kwak, T. Ruf, J. D. Swain, Georgios Tsipolitis, I. V. Gorelov, Yu. Zaitsev, H. Albrecht, R. Wurth, F. Sefkow, D. Kamp, A. Walther, B. Spaan, W. Funk, G. Harder, K. R. Schubert, P. M. Patel, M. Plesˇko, G. Kernel, V. Tchistilin, H. Schröder, K. Reim, and Rainer Mankel

Subjects
Physics, Nuclear and High Energy Physics, Argus, Particle physics, Annihilation, High Energy Physics::Phenomenology, Hadron, Continuum (design consultancy), Baryon, Nuclear physics, Momentum, High Energy Physics::Experiment, computer, computer.programming_language
Abstract

We report on the first observation of Δ(1232) ++ and Δ ( 1232 ) + + ¯ baryons in e + e − annihilation at energies around 10 GeV, using the ARGUS detector at DORIS II. The sum of the rates of Δ ++ and Δ + + ¯ per hadronic event in the continuum is measured to be 0.040±0.008±0.006, and the rate in direct ϒ(1S) decays is 0.124±0.016±0.015. The momentum spectrum of Δ ++ baryons in direct ϒ(1S) decays has been measured.

Published
1989

5. Observation of the charged isospin partner of the D∗(2459)0

Author

A. Lindner, Anton Babaev, H. Schröder, R. Gläser, J. Spengler, V. Lubimov, A.W. Nilsson, A. Rostovtsev, Robert K. Kutschke, G. Kernel, J. D. Swain, A. Semenov, P. Križan, Leif J. Jönsson, A. Golutvin, A. Walther, R. Davis, W. Schmidt-Parzefall, Mikhail Danilov, J. C. Gabriel, V. Tchistilin, A. Krüger, A. Hölscher, R. Childers, C. W. Darden, B. Holzer, B. Boštjančič, G. Herrera, T. Oest, S. Weseler, Manfred Paulini, E. Križnič, Stefan Schael, J. A. Parsons, S. Khan, H. Kapitza, K. W. Edwards, B. Fominykh, H. Scheck, V. Soloshenko, B. Spaan, C. Geyer, C. Hast, T. Ruf, William R. Frisken, W. Funk, P. M. Patel, H. Wegener, A. Lange, H. I. Cronström, A. Nippe, D. B. Macfarlane, T. S. Yoon, H. Albrecht, D. Wegener, S. Ball, R. S. Orr, K. W. McLean, Yu. Zaitsev, Werner Hofmann, K. Strahl, I. Tichomirov, C. E. K. Charlesworth, R. Wurth, K. Reim, S. Werner, J. Stiewe, Rainer Mankel, M. Reidenbach, M. Pleško, V. Shevchenko, Sergey Semenov, G. Tsipolitis, G. Schweda, Hermann Kolanoski, R. D. Appuhn, A. Drescher, K. R. Schubert, U. Volland, M. Schäfer, I. V. Gorelov, F. Sefkow, J. D. Prentice, G. Harder, P. Krieger, Sally Seidel, Holger Schulz, and R. Waldi

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Argus, Meson, Electron–positron annihilation, Isospin, DESY, computer, Storage ring, computer.programming_language
Abstract

Using the ARGUS detector at the DORIS II e+e- storage ring at DESY, we have observed a new charmed meson of mass (2469±4±6) MeV/c2, decaying to D0π+. This state is a strong candidate for the charged isospin partner of the D∗(2459)0 . The isospin mass splitting is measured to be (14±5±8) MeV/c2.

Published
1989

6. Measurement of the lifetime ratio τ(B=)τ(B0)

Author

J. Stiewe, K. W. Edwards, A. Rostovtsev, J. D. Swain, R. Ruf, S. Ball, S. Weseler, Manfred Paulini, C. E. K. Charlesworth, G. Schweda, S. Werner, Leif J. Jönsson, H. Scheck, H. I. Cronström, D. Wegener, W. Schmidt-Parzelfall, Anton Babaev, A. Semenov, H. Albrecht, J. C. Gabriel, T. S. Yoon, T. Oest, R. Wurth, H. Schröder, U. Volland, K. W. McLean, Mikhail Danilov, A.W. Nilsson, V. Shevchenko, J. Spengler, J. D. Prentice, K. Strahl, B. Vos̆tJanc̆ic̆, H. Wegener, A. Walther, R. Davis, G. Herrera, P. Kriz̆an, C. Geyer, C. Hast, V. Lubimov, G. Kernel, R. Childers, Yu. Zaitsev, R.D. Apphn, V. Tchistilin, A. Lange, A. Krüger, R. S. Orr, M. Reidensbach, C. W. Darden, K. Reim, Sergey Semenov, G. Tsipolitis, A. Lindner, E. Kriznic, S. Khan, B. Fominykh, Hermann Kolanoski, Rainer Mankel, Stefan Schael, A. Drescher, J. A. Parsons, Robert K. Kutschke, H. Kapitza, A. Golutvin, R. Gläser, A. Hölscher, I. V. Gorelov, William R. Frisken, A. Nippe, D. B. Macfarlane, P.M. Pater, Werner Hofmann, I. Tichomirov, V. Soloshenko, R. Waldi, Sally Seidel, Holger Schulz, G. Harder, P. Krieger, B. Holzer, B. Spaan, W. Funk, M. Pleško, M. Schäfer, F. Sefkow, and K. R. Schubert

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Argus, Meson, Branching fraction, Electron–positron annihilation, Detector, Branching (polymer chemistry), computer, Storage ring, computer.programming_language
Abstract

Using the ARGUS detector at the e+e- storage ring DORIS II the ratio of semileptonic branching ratios of B+ and B0 mesons has been determined by comparing the yields of D 0 , D - , and D * (2010) - mesons in semileptonic B decays. We derive the lifetime ratio τ( B + ) τ( B 0 ) =1.00∓0.23±0.14 .

Published
1989

7. Observation of a new charmed-strange meson

Author

H. Wegener, A. Semenov, J. C. Gabriel, A. Nippe, R. D. Appuhn, Sergey Semenov, M. Schäfer, Hermann Kolanoski, H. I. Cronström, J. D. Prentice, J. Stiewe, S. Ball, H. Schröder, Anton Babaev, R. Davis, D. Wegener, Mikhail Danilov, B. Spaan, W. Funk, S. Weseler, Stefan Schael, G. Kernel, C. Geyer, C. Hast, J. A. Parsons, V. Tchistilin, A. Lange, H. Kapitza, B. Fominykh, D. B. MacFarlane, K. W. McLean, T. Ruf, K. Strahl, Werner Hofmann, K. Reim, R. Childers, K. R. Schubert, V. Lubimov, V. Soloshenko, Peter Krieger, C. E. K. Charlesworth, Rainer Mankel, A. Krüger, W. Schmidt-Parzefall, Georgios Tsipolitis, P. M. Patel, M. Plesˇko, J. D. Swain, C. W. Darden, B. Holzer, G. Schweda, F. Sefkow, Leif J. Jönsson, T. Oest, Holger Schulz, R. S. Orr, P. Krizˇan, A. Lindner, R. Gläser, U. Volland, Sally C Seidel, Robert K. Kutschke, G. Herrera, A. Golutvin, M. Reidenbach, A. Hölscher, Wr Frisken, S. Khan, E. Krizˇnicˇ, Manfred Paulini, B. Bosˇtjancˇicˇ, I. V. Gorelov, H. Scheck, John D. Spengler, H. Albrecht, R. Wurth, V. Shevchenko, I. Tichomirov, T. S. Yoon, A. Drescher, A.W. Nilsson, K. W. Edwards, A. Walther, R. Waldi, G. Harder, S. Werner, A. Rostovtsev, and Yu. Zaitsev

Subjects
Physics, Nuclear and High Energy Physics, Argus, Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Nuclear Theory, DESY, Nuclear physics, Fragmentation function, Mass spectrum, High Energy Physics::Experiment, Invariant mass, Nuclear Experiment, computer, Storage ring, computer.programming_language
Abstract

Using the ARGUS detector at the DORIS II e + e − storage ring at DESY, we have obtained evidence for a new charmed-strange meson which decays into D *+ K 0 . Its mass is observed to be 2535.9±0.6±2.0 MeV/ c 2 and its width to be less than 4.6 MeV/ c 2 at the 90% confidence level. No structure is observed at this mass in the D + K 0 invariant mass spectrum, which suggests that an unnatural spin-parity is preferred.

Published
1989

8. Measurement of D∗+ polarization in the decay B̄0 → D∗+ℓ−ν

Author

H. Albrecht, P. Böckmann, R. Gläser, G. Harder, A. Krüger, A. Nippe, M. Reidenbach, M. Schäfer, W. Schmidt-Parzefall, H. Schröder, H.D. Schulz, F. Sefkow, J. Spengler, R. Wurth, R.D. Appuhn, A. Drescher, C. Hast, G. Herrera, D. Kamp, H. Kolanoski, A. Lindner, R. Mankel, H. Scheck, G. Schweda, B. Spaan, A. Walther, D. Wegener, U. Volland, H. Wegener, W. Funk, J.C. Gabriel, J. Stiewe, S. Werner, C.E.K. Charlesworth, K.W. Edwards, W.R. Frisken, H. Kapitza, R. Kutschke, D.B. Macfarlane, K.W. McLean, A.W. Nilsson, R.S. Orr, J.A. Parsons, P.M. Patel, J.D. Prentice, S.C. Seidel, J.D. Swain, G. Tsipolitis, T.-S. Yoon, R. Ammar, S. Ball, D. Coppage, R. Davis, S. Kanekal, N. Kwak, T. Ruf, S. Schael, K.R. Schubert, K. Strahl, R. Waldi, B. Boštjančič, G. Kernel, P. Križan, E. Križnič, M. Pleško, H.I. Cronström, L. Jönsson, A. Babaev, M. Danilov, B. Fominykh, A. Golutvin, I. Gorelov, V. Lubimov, A. Rostovtsev, A. Semenov, S. Semenov, V. Shevchenko, V. Soloshenko, V. Tchistilin, I. Tichomirov, Yu. Zaitsev, R. Childers, C.W. Darden, and R.C. Fernholz

Subjects
lcsh:Physics, lcsh:QC1-999
Abstract

Using the ARGUS detector at the e+e− storage ring DORIS II, we have measured the average polarization of D∗+ mesons originating from exclusive decays B̄0 → D∗+ℓ−ν. By comparing the D∗+ decay angular distribution to a functional form 1 + α cos2≡, we determine α to be α=0.7±0.9. This value of α leads to a ratio of longitudinal to transverse decay with Γl/ΓT=0.85±0.45, which allows the determination, |Vcb|=0.052±0.011. The importance of the transverse helicity component is manifested in the q2 and lepton spectra,which are also presented.

Published
1989

9. Search for b→sγ in exclusive decays of B mesons

Author

H. Albrecht, R. Gläser, G. Harder, A. Krüger, A. Nippe, T. Oest, M. Reidenbach, M. Schäfer, W. Schmidt-Parzefall, H. Schröder, H.D. Schulz, F. Sefkow, R. Wurth, R.D. Appuhn, A. Drescher, C. Hast, G. Herrera, H. Kolanoski, A. Lange, A. Lindner, R. Mankel, H. Scheck, G. Schweda, B. Spaan, A. Walther, D. Wegener, M. Paulini, K. Reim, U. Volland, H. Wegener, W. Funk, J. Stiewe, S. Werner, S. Ball, J.C. Gabriel, C. Geyer, A. Hölscher, W. Hofmann, B. Holzer, S. Khan, J. Spengler, C.E.K. Charlesworth, K.W. Edwards, W.R. Frisken, H. Kapitza, P. Krieger, R. Kutschke, D.B. MacFarlane, K.W. McLean, R.S. Orr, J.A. Parsons, P.M. Patel, J.D. Prentice, S.C. Seidel, J.D. Swain, G. Tsipolitis, T.-S. Yoon, R. Davis, T. Ruf, S. Schael, K.R. Schubert, K. Strahl, R. Waldi, S. Weseler, B. Bos̆tjanc̆ic̆, G. Kernel, P. Kriz̆an, E. Kriz̆nic̆, M. Ples̆ko, H.I. Cronström, L. Jönsson, A.W. Nilsson, A. Babaev, M. Danilov, B. Fominykh, A. Golutvin, I. Gorelov, V. Lubimov, A. Rostovtsev, A. Semonov, S. Semenov, V. Shevchenko, V. Soloshenko, V. Tchistilin, I. Tichomirov, Yu. Zaitsev, R. Childers, and C.W. Darden

Subjects
Nuclear and High Energy Physics
Published
1989

10. Resonance decomposition of the D∗(2420)0 through a decay angular analysis

Author

V. Lubimov, W. Schmidt-Parzefall, Mikhail Danilov, C. W. Darden, H. Wegener, B. Fominykh, K. W. Edwards, G. Schweda, S. Ball, J. D. Swain, E. Križnič, Werner Hofmann, T. Ruf, M. Pleško, D. Wegener, V. Shevchenko, K. Reim, J. D. Prentice, R. D. Appuhn, G. Herrera, V. Soloshenko, A. Semenov, William R. Frisken, H. I. Cronström, J. C. Gabriel, K. W. McLean, A. Nippe, D. B. Macfarlane, M. Schäfer, K. R. Schubert, S. Werner, K. Strahl, Rainer Mankel, C. E. K. Charlesworth, H. Schröder, M. Reidenbach, Leif J. Jönsson, Manfred Paulini, I. Tichomirov, H. Scheck, U. Volland, C. Geyer, S. Weseler, A. Drescher, B. Spaan, W. Funk, C. Hast, T. Oest, A. Lange, Stefan Schael, J. A. Parsons, I. V. Gorelov, R. S. Orr, J. Stiewe, H. Kapitza, P. M. Patel, H. Albrecht, Anton Babaev, Robert K. Kutschke, P. Križan, A. Golutvin, A. Krüger, Yu. Zaitsev, A. Hölscher, A. Walther, R. Davis, R. Waldi, F. Sefkow, R. Wurth, G. Harder, B. Boštjančič, S. Khan, P. Krieger, T. S. Yoon, B. Holzer, A. Lindner, R. Gläser, J. Spengler, G. Kernel, V. Tchistilin, A. Rostovtsev, Sally Seidel, Holger Schulz, A.W. Nilsson, R. Childers, Sergey Semenov, G. Tsipolitis, and Hermann Kolanoski

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Argus, Meson, Electron–positron annihilation, Resonance, State (functional analysis), computer, Decomposition, computer.programming_language
Abstract

Using data collected with the ARGUS detector, we have performed a decay angular analysis of the enhancement, previously known as the D∗ (2420), seen in the final state D∗(2010)+π−. We thereby exhibit that the observed broad structure is actually due to two relatively narrow resonances, one of which is identified as the D∗(2459)0, while the massof the other is measured to be (2414±2±5) MeV/c2. The results of the analysis are in good agreement with the interpretation of the two states as L=1 D mesons of spin-parities 2+ and 1+ respectively.

Published
1989

11. Measurement of the decay B0→D−ℓ+ν

Author

H. Albrecht, R. Gläser, G. Harder, A. Krüger, A. Nippe, T. Oest, M. Reidenbach, M. Schäfer, W. Schmidt-Parzefall, H. Schröder, H.D. Schulz, F. Sefkow, R. Wurth, R.D. Appuhn, A. Drescher, C. Hast, G. Herrera, H. Kolanoski, A. Lange, A. Lindner, R. Mankel, H. Scheck, G. Schweda, B. Spaan, A. Walther, D. Wegener, M. Paulini, K. Reim, U. Volland, H. Wegener, W. Funk, J. Stiewe, S. Werner, S. Ball, J.C. Gabriel, C. Geyer, A. Hölscher, W. Hofmann, B. Holzer, S. Khan, J. Spengler, C.E.K. Charlesworth, K.W. Edwards, W.R. Frisken, H. Kapitza, P. Krieger, R. Kutschke, D.B. MacFarlane, K.W. McLean, R.S. Orr, J.A. Parsons, P.M. Patel, J.D. Prentice, S.C. Seidel, J.D. Swain, G. Tsipolitis, T.-S. Yoon, R. Davis, T. Ruf, S. Schael, K.R. Schubert, K. Strahl, R. Waldi, S. Weseler, B. Boštjančič, G. Kernel, P. Križan, E. Križnič, M. Pleško, H.I. Cronström, L. Jönsson, A.W. Nilsson, A. Babaev, M. Danilov, B. Fominykh, A. Golutvin, I. Gorelov, V. Lubimov, A. Rostovtsev, A. Semenov, S. Semenov, V. Shevchenko, V. Soloshenko, V. Tchistilin, I. Tichomirov, Yu. Zaitsev, R. Childers, and C.W. Darden

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Argus, Particle physics, Meson, Branching fraction, Electron–positron annihilation, computer, Storage ring, computer.programming_language
Abstract

Using the ARGUS detector at the e + e − storage ring DORIS II, we have investigated the decay B 0 →D − l + ν, where l + is e + or μ + . The B 0 mesons were produced in 150 000 ϒ(4S) decays. Assuming electron-muon universality we obtain a branching ratio BR(B 0 →D − e + ν )=BR(B 0 →D − μ + ν )=(1.8±0.6±0.5)%.

Published
1989

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