A measurement of the partial width ratio View the MathML source using a method which tags the View the MathML source decays through the lif etime of the produced heavy hadrons is presented. This method relies on the tracking precision afforded by a double-sided silicon vertex detector. The tag algorithm makes a probabilistic interpretation of three-dimensional track impact parameters, using the data to measure the resolution. By tagging the two b hadrons separately, both View the MathML source and the tag efficiency can be determined from the data. For a 26% efficiency of tagging a single b hadron within the vertex detector solid angle coverage, a purity of 96% is achieved. A value of View the MathML source is found. Combining this result with other recent ALEPH View the MathML source measurements gives a 95% confidence upper limit on the Standard Model top mass of Mt < 228 GeV.

A precise measurement of ΓZ→bb/ΓZ→hadrons / D. Buskulic, I. De Bonis, D. Decamp, P. Ghez, C. Goy, J.-P. Lees, M.-N. Minard, B. Pietrzyk, F. Ariztizabal, P. Comas, J.M. Crespo, M. Delfino, I. Efthymiopoulos, E. Fernandez, M. Fernandez-Bosman, V. Gaitan, Ll. Garrido, T. Mattison, A. Pacheco, C. Padilla, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 313:(1993), pp. 535-548. [10.1016/0370-2693(93)90028-G]

A precise measurement of ΓZ→bb/ΓZ→hadrons

FOCARDI, ETTORE;
1993

Abstract

A measurement of the partial width ratio View the MathML source using a method which tags the View the MathML source decays through the lif etime of the produced heavy hadrons is presented. This method relies on the tracking precision afforded by a double-sided silicon vertex detector. The tag algorithm makes a probabilistic interpretation of three-dimensional track impact parameters, using the data to measure the resolution. By tagging the two b hadrons separately, both View the MathML source and the tag efficiency can be determined from the data. For a 26% efficiency of tagging a single b hadron within the vertex detector solid angle coverage, a purity of 96% is achieved. A value of View the MathML source is found. Combining this result with other recent ALEPH View the MathML source measurements gives a 95% confidence upper limit on the Standard Model top mass of Mt < 228 GeV.
1993
313
535
548
D. Buskulic;I. De Bonis;D. Decamp;P. Ghez;C. Goy;J.-P. Lees;M.-N. Minard;B. Pietrzyk;F. Ariztizabal;P. Comas;J.M. Crespo;M. Delfino;I. Ef...espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/638319
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 181
  • ???jsp.display-item.citation.isi??? 168
social impact