CERN Accelerating science

LHCb Note
Report number	LHCb-2007-017 ; CERN-LHCb-2007-017 ; LPHE Note 2007-03
Title	The Bs -> Ds pi and Bs -> Ds K selections
Author(s)	Borel, J ; Nicolas, L ; Schneider, O ; Van Hunen, J
Series	(PHYS)
Submitted by	[email protected] on 17 Apr 2007
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; LHCb
Free keywords	LHCb ; Physics
Abstract	The decay channels Bs->Dspi and Bs->DsK will be used to extract the physics parameters $\Delta m_s$, $\Delta\Gamma_s$ and $\gamma + \phi_s$. Simulation studies based on Monte Carlo samples produced in 2004 and 2005 show that a total of 140k Bs->Dspi and 6.2k Bs->DsK events are expected to be triggered, reconstructed and selected in $2fb^{-1}$ of data ($10^7s$ of data taking at a luminosity of $2\times 10^{32}\unit{cm^{-2}s^{-1}}$). The combinatorial background-over-signal ratio originating from inclusive bb events is expected to be $B/S < 0.05~\at~90\%$ CL~for Bs->Dspi whereas, for Bs->DsK, the limit is $B/S < 0.18~\at~90\%$~CL.
Copyright/License	Preprint: (License: CC-BY-4.0)

Corresponding record in: Inspire