Etude du melange B0_s - bar B0_s dans l'expérience ALEPH au LEP - Archive ouverte HAL Access content directly
Theses Year : 1998

Etude du melange B0_s - bar B0_s dans l'expérience ALEPH au LEP

(1)
1

Abstract

A search for B0_s oscillations is performed in a sample of semileptonic B hadron decays collected by the ALEPH experiment during 1991--1995. Compared to previous inclusive analyses, the proper time resolution and mesons flavour tagging are significantly improved. In addition, subsamples of the data are enriched in B0_s. Unbinned maximum likelihood fits are performed to derive: Delta m_s > 9.4 ps-1 at 95% confidence level, which is the highest limit to date. Combining with the ALEPH D-_s based analyses yields Delta m_s > 9.5 ps-1 at 95% confidence level. This provides a significant constraint on the right side of the Unitarity Triangle of the CKM matrix.
NIL
Fichier principal
Vignette du fichier
tel-00001405.pdf (2.09 Mo) Télécharger le fichier
Loading...

Dates and versions

tel-00001405 , version 1 (13-06-2002)

Identifiers

  • HAL Id : tel-00001405 , version 1

Cite

Olivier Leroy. Etude du melange B0_s - bar B0_s dans l'expérience ALEPH au LEP. Physique des Hautes Energies - Expérience [hep-ex]. Université de la Méditerranée - Aix-Marseille II, 1998. Français. ⟨NNT : ⟩. ⟨tel-00001405⟩
176 View
279 Download

Share

Gmail Facebook Twitter LinkedIn More