Measurement of b-hadron masses

The LHCb Collaboration

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Measurements of b-hadron masses are performed with the exclusive decay modes B +→J/ψK +, B 0→J/ψK +, B0→J/ψKS0, Bs0→J/ψφ and Λb0→J/ψΛ using an integrated luminosity of 35pb -1 collected in pp collisions at a centre-of-mass energy of 7 TeV by the LHCb experiment. The momentum scale is calibrated with J/ψ→μ +μ - decays and verified to be known to a relative precision of 2 ×10 -4 using other two-body decays. The results are more precise than previous measurements, particularly in the case of the Bs0 and Λb0 masses.

Original languageEnglish
Pages (from-to)241-248
Number of pages8
JournalPhysics Letters B
Issue number3-5
Publication statusPublished - 28 Feb 2012
Externally publishedYes

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