Title First observation of $\overline{B}_{s}^{0}\rightarrow D_{s}^{\pm}K^{\mp}$ and measurement of the ratio of branching fractions $\mathcal{B}(\overline{B}_{s}^{0}\rightarrow D_{s}^{\pm}K^{\mp})/\mathcal{B}(\overline{B}_{s}^{0}\rightarrow D_{s}^{+}\pi^{-})$ Author Aaltonen, T. Van Remortel, N. et al. Faculty/Department Faculty of Sciences. Physics Publication type article Publication 2009 New York, N.Y. , 2009 Subject Physics Source (journal) Physical review letters. - New York, N.Y. Volume/pages 103(2009) :19 , p. 191802,1-191802,7 ISSN 0031-9007 ISI 000271568200007 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract A combined mass and particle identification fit is used to make the first observation of the decay B̅ s0→Ds±K∓ and measure the branching fraction of B̅ s0→Ds±K∓ relative to B̅ s0→Ds+π-. This analysis uses 1.2  fb-1 integrated luminosity of pp̅ collisions at √s=1.96  TeV collected with the CDF II detector at the Fermilab Tevatron collider. We observe a B̅ s0→Ds±K∓ signal with a statistical significance of 8.1σ and measure B(B̅ s0→Ds±K∓)/B(B̅ s0→Ds+π-)=0.097±0.018(stat)±0.009(syst). Full text (open access) https://repository.uantwerpen.be/docman/irua/a20eb3/8df6c5f5.pdf E-info http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000271568200007&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000271568200007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000271568200007&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle