Title Measurement of ratios of fragmentation fractions for bottom hadrons in $p\overline{p}$ collisions at $\sqrt{s}$=1.96 TeV Author Aaltonen, T. Van Remortel, N. et al. Faculty/Department Faculty of Sciences. Physics Publication type article Publication 2008 Lancaster, Pa , 2008 Subject Physics Source (journal) Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003 Volume/pages 77(2008) :7 , p. 072003,1-072003,31 ISSN 0556-2821 ISI 000255457800006 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract This paper describes the first measurement of b-quark fragmentation fractions into bottom hadrons in Run II of the Tevatron Collider at Fermilab. The result is based on a 360  pb-1 sample of data collected with the CDF II detector in pp̅ collisions at √s=1.96  TeV. Semileptonic decays of B̅ 0, B-, and B̅ s0 mesons, as well as Λb0 baryons, are reconstructed. For an effective bottom hadron pT threshold of 7  GeV/c, the fragmentation fractions are measured to be fu/fd=1.054±0.018(stat)-0.045+0.025(sys)±0.058(B), fs/(fu+fd)=0.160±0.005(stat)-0.010+0.011(sys)-0.034+0.057(B), and fΛb/(fu+fd)=0.281±0.012(stat)-0.056+0.058(sys)-0.087+0.128(B), where the uncertainty B is due to uncertainties on measured branching ratios. The value of fs/(fu+fd) agrees within one standard deviation with previous CDF measurements and the world average of this quantity, which is dominated by LEP measurements. However, the ratio fΛb/(fu+fd) is approximately twice the value previously measured at LEP. The approximately 2σ discrepancy is examined in terms of kinematic differences between the two production environments. Full text (open access) https://repository.uantwerpen.be/docman/irua/3923fb/15822660.pdf E-info http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000255457800006&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000255457800006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000255457800006&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle