The first observation of the decay B0 -> anti-D0 K+ K- is reported from an analysis of 0.62 fb-1 of pp collision data collected with the LHCb detector. Its branching fraction is measured relative to that of the topologically similar decay B0 -> anti-D0 pi+ pi- to be 0.056+-0.011+-0.007, where the first uncertainty is statistical and the second is systematic. The significance of the signal is 5.8 sigma. Evidence, with 3.8 sigma significance, for Bs0 -> anti-D0 K+ K- decays is also presented. The relative branching fraction is measured to be 0.90+-0.27+.0.20. These channels are of interest to study the mechanisms behind hadronic B decays, and open new possibilities for CP violation analyses with larger data sets.

Observation of B0→D ̄0K+ K- and evidence for Bs0→D ̄0K+ K- / R., A., C., A.B., A., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P., A.C., A., A., S., A., Y., A., L., A., J., A., R., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 109:13(2012), pp. 131801-1-131801-8. [10.1103/PhysRevLett.109.131801]

Observation of B0→D ̄0K+ K- and evidence for Bs0→D ̄0K+ K-

BIZZETI, Andrea;
2012

Abstract

The first observation of the decay B0 -> anti-D0 K+ K- is reported from an analysis of 0.62 fb-1 of pp collision data collected with the LHCb detector. Its branching fraction is measured relative to that of the topologically similar decay B0 -> anti-D0 pi+ pi- to be 0.056+-0.011+-0.007, where the first uncertainty is statistical and the second is systematic. The significance of the signal is 5.8 sigma. Evidence, with 3.8 sigma significance, for Bs0 -> anti-D0 K+ K- decays is also presented. The relative branching fraction is measured to be 0.90+-0.27+.0.20. These channels are of interest to study the mechanisms behind hadronic B decays, and open new possibilities for CP violation analyses with larger data sets.
2012
109
13
131801-1
131801-8
Observation of B0→D ̄0K+ K- and evidence for Bs0→D ̄0K+ K- / R., A., C., A.B., A., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P., A.C., A., A., S., A., Y., A., L., A., J., A., R., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 109:13(2012), pp. 131801-1-131801-8. [10.1103/PhysRevLett.109.131801]
R., Aaij; C., Abellan Beteta; A., Adametz; B., Adeva; M., Adinolfi; C., Adrover; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/812737
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