Measurement of the CP-violating phase Φ<inf>s</inf> in B<sup>0</sup><inf>s</inf> → J/ψπ<sup>+</sup>π<sup>-</sup> decays
- R. Aaij,
- C. Abellan Beteta,
- B. Adeva,
- M. Adinolfi,
- C. Adrover,
- A. Affolder
- National Institute for Subatomic Physics,
- Ramon Llull University,
- University of Barcelona,
- University of Santiago de Compostela,
- University of Bristol,
- CNRS
Research Output: Contribution to journal Article Peer-review
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Abstract
Measurement of the mixing-induced CP-violating phase Φ s in B 0 s decays is of prime importance in probing new physics. Here 7421 ± 105 signal events from the dominantly CP-odd final state J/ψπ +π - are selected in 1 fb -1 of pp collision data collected at √ s = 7 TeV with the LHCb detector. A timedependent fit to the data yields a value of Φ s = -0.019 +0.173+0.004 -0.174-0.003 rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.
Publication Information
Output type
Research Output: Contribution to journal Article Peer-review
Original language
EnglishPages from-to (Number of pages)
Pages 378-386 (9 pages)Journal (Volume, Issue Number)
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (Volume 713, Issue 4-5)Publication milestones
- Published - 18/07/2012
Publication status
Published - 18/07/2012
ISSN
0370-2693Publication IDs
- Scopus: 84937644633
- WOS: 000306637900005
Funding Details
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 .
FundersFunding numbers
ANCS
-CNRS/IN2P3
-MinES of Russia and Rosatom
-NAS Ukraine
-Region Auvergne
-SCSR
-NSF
1040231
NSF
-SER
-CERN
-ERC
-STFC
PP/E000347/1, ST/H001069/2, ST/L001195/1, ST/H001026/1, ST/H001085/2, ST/K001256/1, ST/K001361/1, ST/J005614/1, GRIDPP, ST/G502412/1, ST/K001310/1, ST/F008015/1, ST/G005974/1, LHCb, ST/H00100X/1, ST/L001144/1, ST/K00073X/1, ST/H00100X/2, ST/K000705/1, PP/E002722/1, PP/E000355/1, ST/H006737/1, ST/H001093/2, ST/M001431/1, ST/K001418/1, ST/K00140X/1, ST/M001474/1, LHCb Upgrades, ST/H001093/1, ST/I002839/1, ST/K000616/1, ST/L001225/1, ST/I505572/1, ST/J004820/1, ST/H001026/2, ST/F007094/1
STFC
-SFI
-HGF
-DFG
-SNF
127479, 139663, 141096
SNF
-NSFC
-CAPES
-BMBF
-NWO
-FOM
-CNPq
-INFN
-FAPERJ
-FINEP
-MICINN
-FP7
-