First measurement of the CP-violating phase in bs0→φφ decays
- R. Aaijb(Author),
- C. Abellan Betetaae(Author),
- B. Adevaa(Author),
- M. Adinolfiaj(Author),
- C. Adroverv(Author),
- A. Affolderp(Author)
- aUniversity of Santiago de Compostela,
- bNational Institute for Subatomic Physics,
- cPontifícia Universidade Católica do Rio de Janeiro,
- dIstituto Nazionale Di Fisica Nucleare, Frascati,
- eAlikhanov Institute for Theoretical and Experimental Physics,
- fCERN
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Abstract
A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in Bs0→φφ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between Bs0-B̄s0 mixing and the b→ss̄s gluonic penguin decay amplitude. Using a sample of pp collision data corresponding to an integrated luminosity of 1.0 fb -1 and collected at a center-of-mass energy of 7 TeV with the LHCb detector, 880 Bs0→φφ signal decays are obtained. The CP-violating phase is measured to be in the interval [-2.46,-0.76] rad at a 68% confidence level. The p value of the standard model prediction is 16%.
Publication Information
Output type
Research Output: Contribution to journal Article Peer-review
Original language
EnglishArticle number
241802Journal (Volume, Issue Number)
Physical Review Letters (Volume 110, Issue 24)Publication milestones
- Published- 12/06/2013
Publication status
Published
- 12/06/2013
ISSN
0031-9007External Publication IDs
- Scopus: 84879440718
- WOS: 000320307400005
Funding Details
FundersFunding numbers
NSF
-STFC
PP/E000347/1, ST/H001085/2, ST/H001085/1, ST/K001256/1, ST/K001361/1, GRIDPP, ST/K001604/1, ST/F008015/1, ST/L00352X/1, ST/G005974/1, LHCb, ST/H00081X/2, ST/L001144/1, ST/H00081X/1, ST/K00073X/1, ST/K000748/1, ST/J005568/1, ST/K004646/1, ST/M000761/1, ST/H006737/1, ST/H001093/2, ST/M001431/1, ST/K001418/1, ST/K00140X/1, ST/M001474/1, LHCb Upgrades, ST/H001093/1, ST/J004332/1, ST/I505572/1, ST/K003410/1, ST/K00137X/1, ST/F007094/1, ST/L003392/1
STFC
-SNF
141096
SNF
-