Search for a fourth generation b '-quark at LEP-II at root s=196-209GeV
A search for the pair production of fourth generation b'-quarks was performed using data taken by the DELPHI detector at LEP-II. The analysed data were collected at centre-of-mass energies ranging from 196 to 209 GeV, corresponding to an integrated luminosity of 420 pb-1. No evidence for a sign...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal article |
| Jezik: | English |
| Izdano: |
2007
|
| _version_ | 1826280722053201920 |
|---|---|
| author | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, J Augustinus, A Baillon, P Ballestrero, A Bambade, P |
| author_facet | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, J Augustinus, A Baillon, P Ballestrero, A Bambade, P |
| author_sort | Abdallah, J |
| collection | OXFORD |
| description | A search for the pair production of fourth generation b'-quarks was performed using data taken by the DELPHI detector at LEP-II. The analysed data were collected at centre-of-mass energies ranging from 196 to 209 GeV, corresponding to an integrated luminosity of 420 pb-1. No evidence for a signal was found. Upper limits on BR(b'→bZ) and BR(b'→cW) were obtained for b' masses ranging from 96 to 103 GeV/c 2. These limits, together with the theoretical branching ratios predicted by a sequential four generations model, were used to constrain the value of RCKM = | Vtb′Vtb/Vcb′|, where V cb′, Vtb′ and Vtb are elements of the extended CKM matrix. © Springer-Verlag Berlin Heidelberg 2007. |
| first_indexed | 2024-03-07T00:17:58Z |
| format | Journal article |
| id | oxford-uuid:7b81f277-3e44-4d38-9f45-42e99cae719f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:17:58Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:7b81f277-3e44-4d38-9f45-42e99cae719f2022-03-26T20:51:09ZSearch for a fourth generation b '-quark at LEP-II at root s=196-209GeVJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7b81f277-3e44-4d38-9f45-42e99cae719fEnglishSymplectic Elements at Oxford2007Abdallah, JAbreu, PAdam, WAdzic, PAlbrecht, TAlemany-Fernandez, RAllmendinger, TAllport, PAmaldi, UAmapane, NAmato, SAnashkin, EAndreazza, AAndringa, SAnjos, NAntilogus, PApel, WArnoud, YAsk, SAsman, BAugustin, JAugustinus, ABaillon, PBallestrero, ABambade, PA search for the pair production of fourth generation b'-quarks was performed using data taken by the DELPHI detector at LEP-II. The analysed data were collected at centre-of-mass energies ranging from 196 to 209 GeV, corresponding to an integrated luminosity of 420 pb-1. No evidence for a signal was found. Upper limits on BR(b'→bZ) and BR(b'→cW) were obtained for b' masses ranging from 96 to 103 GeV/c 2. These limits, together with the theoretical branching ratios predicted by a sequential four generations model, were used to constrain the value of RCKM = | Vtb′Vtb/Vcb′|, where V cb′, Vtb′ and Vtb are elements of the extended CKM matrix. © Springer-Verlag Berlin Heidelberg 2007. |
| spellingShingle | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, J Augustinus, A Baillon, P Ballestrero, A Bambade, P Search for a fourth generation b '-quark at LEP-II at root s=196-209GeV |
| title | Search for a fourth generation b '-quark at LEP-II at root s=196-209GeV |
| title_full | Search for a fourth generation b '-quark at LEP-II at root s=196-209GeV |
| title_fullStr | Search for a fourth generation b '-quark at LEP-II at root s=196-209GeV |
| title_full_unstemmed | Search for a fourth generation b '-quark at LEP-II at root s=196-209GeV |
| title_short | Search for a fourth generation b '-quark at LEP-II at root s=196-209GeV |
| title_sort | search for a fourth generation b quark at lep ii at root s 196 209gev |
| work_keys_str_mv | AT abdallahj searchforafourthgenerationbquarkatlepiiatroots196209gev AT abreup searchforafourthgenerationbquarkatlepiiatroots196209gev AT adamw searchforafourthgenerationbquarkatlepiiatroots196209gev AT adzicp searchforafourthgenerationbquarkatlepiiatroots196209gev AT albrechtt searchforafourthgenerationbquarkatlepiiatroots196209gev AT alemanyfernandezr searchforafourthgenerationbquarkatlepiiatroots196209gev AT allmendingert searchforafourthgenerationbquarkatlepiiatroots196209gev AT allportp searchforafourthgenerationbquarkatlepiiatroots196209gev AT amaldiu searchforafourthgenerationbquarkatlepiiatroots196209gev AT amapanen searchforafourthgenerationbquarkatlepiiatroots196209gev AT amatos searchforafourthgenerationbquarkatlepiiatroots196209gev AT anashkine searchforafourthgenerationbquarkatlepiiatroots196209gev AT andreazzaa searchforafourthgenerationbquarkatlepiiatroots196209gev AT andringas searchforafourthgenerationbquarkatlepiiatroots196209gev AT anjosn searchforafourthgenerationbquarkatlepiiatroots196209gev AT antilogusp searchforafourthgenerationbquarkatlepiiatroots196209gev AT apelw searchforafourthgenerationbquarkatlepiiatroots196209gev AT arnoudy searchforafourthgenerationbquarkatlepiiatroots196209gev AT asks searchforafourthgenerationbquarkatlepiiatroots196209gev AT asmanb searchforafourthgenerationbquarkatlepiiatroots196209gev AT augustinj searchforafourthgenerationbquarkatlepiiatroots196209gev AT augustinusa searchforafourthgenerationbquarkatlepiiatroots196209gev AT baillonp searchforafourthgenerationbquarkatlepiiatroots196209gev AT ballestreroa searchforafourthgenerationbquarkatlepiiatroots196209gev AT bambadep searchforafourthgenerationbquarkatlepiiatroots196209gev |