Journal article
First observation of the decay Bc →J/ψπ π -π
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, AA Alves, S Amato, Y Amhis, J Anderson, RB Appleby, O Aquines Gutierrez, F Archilli Show all
Physical Review Letters | AMER PHYSICAL SOC | Published : 2012
Abstract
The decay Bc+→J/ψπ +π -π + is observed for the first time, using 0.8fb -1 of pp collisions at √s=7TeV collected by the LHCb experiment. The ratio of branching fractions B(Bc+→J/ψπ +π -π +)/ B(Bc+→J/ψπ +) is measured to be 2.41±0.30±0. 33, where the first uncertainty is statistical and the second is systematic. The result is in agreement with theoretical predictions. © 2012 CERN.
Grants
Awarded by National Science Foundation
Funding Acknowledgements
We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at CERN and at the LHCb institutes, and acknowledge support from the National Agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); CERN; NSFC (China); CNRS/IN2P3 (France); BMBF, DFG, HGF and MPG (Germany); SFI (Ireland); INFN (Italy); FOM and NWO (The Netherlands); SCSR (Poland); ANCS (Romania); MinES of Russia and Rosatom (Russia); MICINN, XuntaGal and GENCAT (Spain); SNSF and SER (Switzerland); NAS Ukraine (Ukraine); STFC (United Kingdom); NSF (USA). We also acknowledge the support received from the ERC under FP7 and the Region Auvergne.