Detalle de: Search for a fourth generation b’-quark at LEP-II at $\sqrt{s}=\,$196–209 GeV
| Title | Search for a fourth generation b’-quark at LEP-II at $\sqrt{s}=\,$196–209 GeV |
| 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/c2. 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. |
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| Doi | 10.1140/epjc/s10052-007-0273-z |
| Publication Date | 29 Mar 2007 |
| Publication Type | Article |
| Researcher | David Rodríguez González |
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