What if the Mass Difference $ΔM_s$ is around 18 Inverse Picoseconds?
| dc.creator | Ali, A. | |
| dc.creator | London, D. | |
| dc.date | 2000-12-13 | |
| dc.date | 2000-12-19 | |
| dc.date.accessioned | 2026-07-07T12:26:08Z | |
| dc.date.available | 2026-07-07T12:26:08Z | |
| dc.description | Present experiments in pursuit of the mass difference in the Bs-Bs(bar) system have put a lower bound on this quantity of $ΔM_s > 14.9 ps^{-1}$ (at 95% C.L.). The same experiments also yield a local minimum in the log-likelihood function around $ΔM_s = 17.7 ps^{-1}$, which is $2.5σ$ away from being zero. Motivated by these observations, we investigate the consequences of a possible measurement of $ΔM_s = 17.7 \pm 1.4 ps^{-1}$, in the context of both the standard model and supersymmetric models with minimal flavor violation. We perform a fit of the quark mixing parameters in these theories and estimate the expected ranges of the CP asymmetries in B decays, characterized by $α$, $β$ and $γ$, the interior angles of the CKM-unitarity triangle. Based on this study, we argue that, if indeed $ΔM_s$ turns out to be in its currently-favored range, this would disfavor a large class of supersymmetric models. Indeed, of all the models examined here, the best fit to the data occurs for the standard model. | |
| dc.description | 14 pages, LaTeX, 8 figures, corrected some typos. Accepted for publication in Eur. Phys. J. C | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0012155 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0012155 | |
| dc.identifier | Eur.Phys.J.C18:665-672,2001 | |
| dc.identifier | doi:10.1007/s100520100582 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/214788 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | What if the Mass Difference $ΔM_s$ is around 18 Inverse Picoseconds? | |
| dc.type | text |