Determining Delta_Gamma_s / Gamma_s from Bf(B_s \to D_s^{(*)+} D_s{(*)-}) measurements at e^+ e^- colliders running on the Y(5S) resonance

Determining Delta_Gamma_s / Gamma_s from Bf(B_s \to D_s^{()+} D_s{()-}) measurements at e^+ e^- colliders running on the Y(5S) resonance

dc.creator	Drutskoy, A.
dc.date	2006-04-06
dc.date	2006-04-13
dc.date.accessioned	2026-07-07T07:09:55Z
dc.date.available	2026-07-07T07:09:55Z
dc.description	The feasibility of determining $ΔΓ_s / Gamma_s$ from $B_s \to D_s^{()+} D_s^{()-}$ decay branching fraction measurements at $e^+ e^-$ colliders running on the $Υ$(5S) resonance is discussed. The expected accuracies of the $B_s \to D_s^{()+} D_s^{()-}$ branching fraction measurements and the $ΔΓ_s / Γ_s$ determination with 50fb$^{-1}$ of data at the $Υ$(5S) are estimated using Monte Carlo simulation. Comparison of that measurement with a directly measured $ΔΓ_s / Γ_s$ value within and beyond Standard Model is discussed. A new method of estimating $ΔΓ_s / Γ_s$ is proposed, based on comparing the CP-even and CP-odd components in $B^0 \to J/ΨK^{*0}$ and $B_s \to J/Ψϕ$ decays. A comparison of $B_s$ and $B^0$ lifetime measurements with theoretical predictions is discussed.
dc.description	8 pages
dc.identifier	https://arxiv.org/abs/hep-ph/0604061
dc.identifier	http://arxiv.org/abs/hep-ph/0604061
dc.identifier.uri	http://salesiana.dossiersoluciones.com/handle/123456789/111258
dc.subject	High Energy Physics - Phenomenology
dc.title	Determining Delta_Gamma_s / Gamma_s from Bf(B_s \to D_s^{()+} D_s{()-}) measurements at e^+ e^- colliders running on the Y(5S) resonance
dc.type	text