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First observation of the decay Bc+ to J/psi pi+pi-pi+

Abstract : The decay Bc+ --> J/psi pi+pi-pi+ is observed for the first time, using 0.8 fb-1 of pp collisions at sqrt{s}=7 TeV collected by the LHCb experiment. The ratio of branching fractions BR(Bc+ --> J/psi pi+pi-pi+)/BR(B_c+ --> J/psi pi+) is measured to be 2.41+-0.30+-0.33, where the first uncertainty is statistical and the second systematic. The result is in agreement with theoretical predictions.
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http://hal.in2p3.fr/in2p3-00687961
Contributor : Sabine Starita <>
Submitted on : Monday, April 16, 2012 - 10:51:53 AM
Last modification on : Friday, November 20, 2020 - 3:30:14 PM

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R. Aaij, S. Barsuk, O. Callot, J. He, B. Jean-Marie, et al.. First observation of the decay Bc+ to J/psi pi+pi-pi+. Physical Review Letters, American Physical Society, 2012, 108, pp.251802. ⟨10.1103/PhysRevLett.108.251802⟩. ⟨in2p3-00687961⟩

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