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Measurement of the B(0)-B(0) mixing parameter Deltam(d) using semileptonic B0 decays |
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| Authors: | Hara K Hazumi M Abe K Abe K Abe T Adachi I Ahn Byoung Sup Aihara H Akatsu M Asano Y Aso T Aulchenko V Aushev T Bakich A M Ban Y Bay A Bedny I Behera P K Bizjak I Bondar A Bozek A Bracko M Brodzicka J Browder T E Casey B C K Chang P Chao Y Chen K-F Cheon B G Chistov R Choi S-K Choi Y Choi Y K Danilov M Dong L Y Dragic J Eidelman S Eiges V Enari Y Everton C W Fang F Fukunaga C Gabyshev N Garmash A Gershon T Golob B Guo R Haba J Hanagaki K Handa F Hara T Hastings N C Hayashii H Heenan E M Higuchi I Higuchi T Hinz L Hoshi Y Hou W-S Hsiung Y B Hsu S-C Huang H-C Igaki T Igarashi Y Iijima T Inami K |
| Institution: | Osaka University, Japan. |
| Abstract: | We present a measurement of the B0-Bmacr;(0) mixing parameter Deltam(d) using neutral B meson pairs in a 29.1 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We exclusively reconstruct one neutral B meson in the semileptonic B0-->D(*-)l(+)nu decay mode and identify the flavor of the accompanying B meson from its decay products. From the distribution of the time intervals between the two flavor-tagged B meson decay points, we obtain Deltam(d)=(0.494+/-0.012+/-0.015) ps(-1), where the first error is statistical and the second error is systematic. |
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