A new method of measuring ${\Delta \Gamma\over \Gamma}$ in the ${B^0_s- \bar B^0_s}$ system

K. Hartkorn; H.-G. Moser

doi:doi:10.1007/s100529901079

EPJ

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2023 Impact factor 4.2

Particles and Fields

Eur. Phys. J. C 8, 381-383
DOI 10.1007/s100529901079

A new method of measuring ${\Delta \Gamma\over \Gamma}$ in the ${B^0_s- \bar B^0_s}$ system

K. Hartkorn - H.-G. Moser

Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Foehringer Ring 6, D-80805 München, Germany

Received: 3 September 1998 / Published online: 7 April 1999

Abstract
A new way to measure ${\Delta \Gamma\over \Gamma}$ in the ${B^0_s- \bar B^0_s}$ System based on a comparison of the measured B⁰_s and B⁰_d lifetimes is introduced. This allows to use data from all the experiments simultaniously. An upper limit of ${\Delta \Gamma \over \Gamma} \le 0.24$ at 95 % CL can be given. This is below the theoretical upper limit of 0.27.