Measurement of the Λb cross section and the [over bar]Λ[subscript b] ratio with J/ψΛ decays in pp collisions at √s = 7 TeV
Author(s)
Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; Dutta, Valentina; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Y.; Klute, Markus; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Rudolph, Matthew Scott; Stephans, George S. F.; Stoeckli, Fabian; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wyslouch, Boleslaw; Xie, Si; Yang, Mingming; Yilmaz, Yetkin; Zanetti, Marco; Bauer, Gerry P; Li, W.; Luckey Jr, P David; Roland, Christof E; Roland, Gunther M; Sumorok, Konstanty C; Wolf, Roger; Yoon, A. S.; ... Show more Show less
DownloadChatrchyan-2012-Measurement of the c.pdf (630.6Kb)
PUBLISHER_CC
Publisher with Creative Commons License
Creative Commons Attribution
Alternative title
Measurement of the Λb cross section and the Λ¯b ratio with J/ψΛ decays in pp collisions at √s = 7 TeV
Terms of use
Metadata
Show full item recordAbstract
The Λb differential production cross section and the cross section ratio σ(Λ¯b)/σ(Λb) are measured as functions of transverse momentum pΛ¯b[over]T 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[superscript −1]. The product σ(Λb)×B(Λb→J/ψΛ) versus pΛ¯b[over]T 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.
Date issued
2012-08Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physics Letters B
Publisher
Elsevier B.V.
Citation
Chatrchyan, S., V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Measurement of the Λb cross section and the Λ¯b ratio with J/ψΛ decays in pp collisions at √s = 7 TeV.” Physics Letters B 714, no. 2–5 (August 2012): 136–157.
Version: Final published version
ISSN
03702693