Publication
Title
Search for a fourth generation -quark at LEP-II at = 196-209 GeV
Author
Institution/Organisation
DELPHI Collaboration
Abstract
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 $R_{\text{CKM}}=|\frac{V_{cb\prime}}{V_{\text{tb}\prime}V_{tb}}|$, where Vcb′, Vtb′ and Vtb are elements of the extended CKM matrix.
Language
English
Source (journal)
European physical journal : C : particles and fields. - Berlin
Publication
Berlin : 2007
ISSN
1434-6044
Volume/pages
50:3(2007), p. 507-518
ISI
000245853100001
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 30.03.2010
Last edited 11.09.2017