Title
First measurement of the ratio of branching fractions <tex>$\mathcal{B}(\Lambda_{b}^{0}\rightarrow\Lambda_{c}^{+}\mu^{-}\overline{\nu}_{\mu})/\mathcal{B}(\Lambda_{b}^{0}\rightarrow\Lambda_{c}^{+}\pi^{-})$</tex> First measurement of the ratio of branching fractions <tex>$\mathcal{B}(\Lambda_{b}^{0}\rightarrow\Lambda_{c}^{+}\mu^{-}\overline{\nu}_{\mu})/\mathcal{B}(\Lambda_{b}^{0}\rightarrow\Lambda_{c}^{+}\pi^{-})$</tex>
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Volume/pages
79(2009) :3 , p. 032001,1-032001,36
ISSN
0556-2821
ISI
000263816600007
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
This article presents the first measurement of the ratio of branching fractions B(Λb0→Λc+μ-ν&#773; μ)/B(Λb0→Λc+π-). Measurements in two control samples using the same technique B(B&#773; 0→D+μ-ν&#773; μ)/B(B&#773; 0→D+π-) and B(B&#773; 0→D*(2010)+μ-ν&#773; μ)/B(B&#773; 0→D*(2010)+π-) are also reported. The analysis uses data from an integrated luminosity of approximately 172  pb-1 of pp&#773; collisions at √s=1.96  TeV, collected with the CDF II detector at the Fermilab Tevatron. The relative branching fractions are measured to be B(Λb0→Λc+μ-ν&#773; μ)/B(Λb0→Λc+π-)=16.6±3.0(stat)±1.0(syst)+2.6/-3.4(PDG)±0.3(EBR), B(B&#773; 0→D+μ-ν&#773; μ)/B(B&#773; 0→D+π-)= 9.9±1.0(stat)±0.6(syst)±0.4(PDG)±0.5(EBR), and B(B&#773; 0→D*(2010)+μ-ν&#773; μ)/B(B&#773; 0→D*(2010)+π-)=16.5±2.3(stat)± 0.6(syst)±0.5(PDG)±0.8(EBR). The uncertainties are from statistics (stat), internal systematics (syst), world averages of measurements published by the Particle Data Group or subsidiary measurements in this analysis (PDG), and unmeasured branching fractions estimated from theory (EBR), respectively. This article also presents measurements of the branching fractions of four new Λb0 semileptonic decays: Λb0→Λc(2595)+μ-ν&#773; μ, Λb0→Λc(2625)+μ-ν&#773; μ, Λb0→Σc(2455)0π+μ-ν&#773; μ, and Λb0→Σc(2455)++π-μ-ν&#773; μ, relative to the branching fraction of the Λb0→Λc+μ-ν&#773; μ decay. Finally, the transverse-momentum distribution of Λb0 baryons produced in pp&#773; collisions is measured and found to be significantly different from that of B&#773; 0 mesons, which results in a modification in the production cross-section ratio σΛb0/σB&#773; 0 with respect to the CDF I measurement.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/c49858/f0ef58e5.pdf
E-info
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000263816600007&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000263816600007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000263816600007&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
Handle