Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar
The rate Z → bb̄bb̄ was measured using about 2×106 hadronic decays collected by the DELPHI experiment in 1994 and 1995. Events were forced into 3-jets with ymin > 0.06 and a b-tag was required for every jet. The rate was measured to be: R4b = BR(Z → bb̄bb̄)/BR(Z → hadrons), = (6.0 ± 1.9(stst....
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1999
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| _version_ | 1797054949962547200 |
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| author | Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I Albrecht, Z Alderweireld, T Alekseev, G Alemany, R Allmendinger, T Allport, P Almehed, S Amaldi, U Amapane, N Amato, S Anassontzis, E Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W Arnoud, Y Asman, B Augustin, J Augustinus, A |
| author_facet | Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I Albrecht, Z Alderweireld, T Alekseev, G Alemany, R Allmendinger, T Allport, P Almehed, S Amaldi, U Amapane, N Amato, S Anassontzis, E Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W Arnoud, Y Asman, B Augustin, J Augustinus, A |
| author_sort | Abreu, P |
| collection | OXFORD |
| description | The rate Z → bb̄bb̄ was measured using about 2×106 hadronic decays collected by the DELPHI experiment in 1994 and 1995. Events were forced into 3-jets with ymin > 0.06 and a b-tag was required for every jet. The rate was measured to be: R4b = BR(Z → bb̄bb̄)/BR(Z → hadrons), = (6.0 ± 1.9(stst.)) ± 1.4(Syst.)) × 10-4 where the invariant mass of every bb̄ system is above twice the b quark mass. Using the value of R4b the probability of secondary production of a bb̄ pair from a gluon per hadronic Z decay, gbb, was extracted and found to be: gbb = (3.3 ± 1.0(stat) ± 0.8(syst.)) × 10-3. © 1999 Published by Elsevier Science B.V. All rights reserved. |
| first_indexed | 2024-03-06T19:04:32Z |
| format | Journal article |
| id | oxford-uuid:14ab9263-fbb2-49d7-b362-eb40fc0bac35 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:04:32Z |
| publishDate | 1999 |
| record_format | dspace |
| spelling | oxford-uuid:14ab9263-fbb2-49d7-b362-eb40fc0bac352022-03-26T10:21:12ZMeasurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-barJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:14ab9263-fbb2-49d7-b362-eb40fc0bac35EnglishSymplectic Elements at Oxford1999Abreu, PAdam, WAdye, TAdzic, PAjinenko, IAlbrecht, ZAlderweireld, TAlekseev, GAlemany, RAllmendinger, TAllport, PAlmehed, SAmaldi, UAmapane, NAmato, SAnassontzis, EAndersson, PAndreazza, AAndringa, SAntilogus, PApel, WArnoud, YAsman, BAugustin, JAugustinus, AThe rate Z → bb̄bb̄ was measured using about 2×106 hadronic decays collected by the DELPHI experiment in 1994 and 1995. Events were forced into 3-jets with ymin > 0.06 and a b-tag was required for every jet. The rate was measured to be: R4b = BR(Z → bb̄bb̄)/BR(Z → hadrons), = (6.0 ± 1.9(stst.)) ± 1.4(Syst.)) × 10-4 where the invariant mass of every bb̄ system is above twice the b quark mass. Using the value of R4b the probability of secondary production of a bb̄ pair from a gluon per hadronic Z decay, gbb, was extracted and found to be: gbb = (3.3 ± 1.0(stat) ± 0.8(syst.)) × 10-3. © 1999 Published by Elsevier Science B.V. All rights reserved. |
| spellingShingle | Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I Albrecht, Z Alderweireld, T Alekseev, G Alemany, R Allmendinger, T Allport, P Almehed, S Amaldi, U Amapane, N Amato, S Anassontzis, E Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W Arnoud, Y Asman, B Augustin, J Augustinus, A Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar |
| title | Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar |
| title_full | Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar |
| title_fullStr | Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar |
| title_full_unstemmed | Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar |
| title_short | Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar |
| title_sort | measurement of the rate of b b over bar b b over bar events in hadronic z decays and the extraction of the gluon splitting into b b over bar |
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