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Measurements of the Lambda_b0 -> J/psi Lambda decay amplitudes and the Lambda_b0 polarisation in pp collisions at sqrt(s) = 7 TeV

Abstract : An angular analysis of Lambda_b0 -> J/psi Lambda decays is performed using a data sample corresponding to 1.0 fb^{-1} collected in pp collisions at sqrt(s) = 7 TeV with the LHCb detector at the LHC. A parity violating asymmetry characterising the Lambda_b0 -> J/psi Lambda decay of -0.04 +/- 0.17 +/- 0.07 and a Lambda_b0 transverse production polarisation of 0.05 +/- 0.07 +/- 0.02 are measured, where the first uncertainty is statistical and the second systematic.
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http://hal.in2p3.fr/in2p3-00794266
Contributor : Sabine Starita <>
Submitted on : Monday, February 25, 2013 - 1:51:45 PM
Last modification on : Friday, November 20, 2020 - 3:30:14 PM

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R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Measurements of the Lambda_b0 -> J/psi Lambda decay amplitudes and the Lambda_b0 polarisation in pp collisions at sqrt(s) = 7 TeV. Physics Letters B, Elsevier, 2013, 724, pp.27-35. ⟨10.1016/j.physletb.2013.05.041⟩. ⟨in2p3-00794266⟩

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