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dc.contributor.authorCMS Collaboration
Adair, A.
Boulahouache, C.
Cuplov, V.
Ecklund, K.M.
Geurts, F.J.M.
Padley, B.P.
Redjimi, R.
Roberts, J.
Zabel, J.
dc.date.accessioned 2015-07-13T14:59:41Z
dc.date.available 2015-07-13T14:59:41Z
dc.date.issued 2012
dc.identifier.citation CMS Collaboration, Adair, A., Boulahouache, C., et al., . "Measurement of the Λb cross section and the Λ¯b to Λb ratio with J/ψΛ decays in pp collisions at √s=7 TeV." Physics Letters B, 714, no. 2-5 (2012) 136-157. http://dx.doi.org/10.1016/j.physletb.2012.05.063.
dc.identifier.urihttp://hdl.handle.net/1911/80912
dc.description.abstract The Λb differential production cross section and the cross section ratio σ(Λ¯b)/σ(Λb) are measured as functions of transverse momentum pTΛb and rapidity |yΛb| in pp collisions at √s=7 TeV using data collected by the CMS experiment at the LHC. The measurements are based on Λb decays reconstructed in the exclusive final state J/ψΛ, with the subsequent decays J/ψ→μ+μ− and Λ→pπ, using a data sample corresponding to an integrated luminosity of 1.9 fb−1. The product σ(Λb)×B(Λb→J/ψΛ) versus pTΛb falls faster than that of b mesons. The measured value of σ(Λb)×B(Λb→J/ψΛ) for pTΛb>10 GeV and |yΛb|<2.0 is 1.16±0.06±0.12 nb, and the integrated σ(Λ¯b)/σ(Λb) ratio is 1.02±0.07±0.09, where the uncertainties are statistical and systematic, respectively.
dc.language.iso eng
dc.rights This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
dc.title Measurement of the Λb cross section and the Λ¯b to Λb ratio with J/ψΛ decays in pp collisions at √s=7 TeV
dc.type Journal article
dc.citation.journalTitle Physics Letters B
dc.subject.keywordCMS
B physics
dc.citation.volumeNumber 714
dc.citation.issueNumber 2-5
dc.contributor.publisher Elsevier
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1016/j.physletb.2012.05.063
dc.type.publication publisher version
dc.citation.firstpage 136
dc.citation.lastpage 157


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