4 research outputs found

    Observation of the suppressed ADS modes BĀ± ā†’[Ļ€Ā±Kāˆ“Ļ€+Ļ€-] D KĀ± and BĀ± ā†’[Ļ€Ā±Kāˆ“Ļ€+Ļ€-] DĻ€Ā±

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    An analysis of BĀ± ā†’ DKĀ± and BĀ± ā†’ DĻ€Ā± decays is presented where the D meson is reconstructed in the four-body nal state KĀ±Ļ€āˆ“Ļ€+Ļ€-. Using LHCb data corresponding to an integrated luminosity of 1.0 fb-1, rst observations are made of the suppressed ADS modes BĀ± ā†’[Ļ€Ā±Kāˆ“Ļ€+Ļ€-] D KĀ± and BĀ± ā†’ [Ļ€Ā±Kāˆ“Ļ€+Ļ€-]DĻ€Ā± with a signicance of 5.1Ļƒ and greater than 10Ļƒ, respectively. Measurements of CP asymmetries and CP-conserving ratios of partial widths from this family of decays are also performed. The magnitude of the ratio between the suppressed and favoured BĀ± ā†’ DKĀ± amplitudes is determined to be rK B = 0.097Ā±0.011. Ā© CERN for the benet of the LHCb Collaboration

    Effective lifetime measurements in the Bs0ā†’K+K-, B0ā†’K+Ļ€-and B0sā†’Ļ€+K-decays

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    Measurements of the effective lifetimes in the Bs0ā†’K+K-,B0ā†’K +Ļ€- and Bs0ā†’Ļ€+K- decays are presented using 1.0 fb -1 of pp collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The analysis uses a data-driven approach to correct for the decay time acceptance. The measured effective lifetimes areĻ„Bs0ā†’K+K-=1.407Ā±0.016(stat)Ā±0.007(syst) ps,Ļ„B0ā†’K+Ļ€-=1.524Ā±0.011(stat)Ā±0.004(syst) ps,Ļ„Bs0ā†’Ļ€+K-=1.60Ā±0.06(stat)Ā±0.01(syst) ps. This is the most precise determination to date of the effective lifetime in the Bs0ā†’K+K- decay and provides constraints on contributions from physics beyond the Standard Model to the Bs0 mixing phase and the width difference Ī“Ī“s. Ā© 2014 The Authors

    Contrast-enhanced ultrasound in the diagnosis of liver diseases -Tracing the history and Perspective-

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    Interventional Cardiology: A Comprehensive Bibliography

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