First observation of the decay Bc+ to J/psi pi+pi-pi+
LHCb collaboration: R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi,, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander,, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A.A. Alves Jr, S. Amato, Y. Amhis,, J. Anderson, R.B. Appleby, O. Aquines Gutierrez
TL;DR
This paper reports the first observation of the decay Bc+ to J/psi pi+pi-pi+ using LHCb data, measuring its branching ratio relative to Bc+ to J/psi pi+ and confirming theoretical predictions.
Contribution
First experimental observation of the Bc+ to J/psi pi+pi-pi+ decay and measurement of its branching ratio relative to Bc+ to J/psi pi+.
Findings
Decay Bc+ to J/psi pi+pi-pi+ observed for the first time.
Measured branching ratio ratio is 2.41+-0.30+-0.33.
Results agree with theoretical predictions.
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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