Bizjak, I;
Abe, K;
Abe, K;
Aihara, H;
Asano, Y;
Bahinipati, S;
Bakich, AM;
... Zontar, D; + view all
(2005)
Determination of parallel to V-ub parallel to from measurements of the inclusive charmless semileptonic partial rates of B mesons using full reconstruction tags.
PHYS REV LETT
, 95
(24)
, Article 241801. 10.1103/PhysRevLett.95.241801.
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Abstract
We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element parallel to V(ub)parallel to, based on 253 fb(-1) of data collected by the Belle detector at the KEKB e(+)e(-) asymmetric collider. Events are tagged by fully reconstructing one of the B mesons, produced in pairs from Upsilon(4S). The signal for b -> u semileptonic decay is distinguished from the b -> c background using the hadronic mass M-X, the leptonic invariant mass squared q(2) and the variable P(+)equivalent to E-X-parallel to p ->(X)parallel to. The results are obtained for events with p(center dot)(*)>= 1 GeV/c, in three kinematic regions (1) M-X< 1.7 GeV/c(2), (2) M-X< 1.7 GeV/c(2) combined with q(2)> 8 GeV2/c(2), and by (3) P+< 0.66 GeV/c. The matrix element parallel to V(ub)parallel to is found to be (4.09 +/- 0.19 +/- 0.20(-0.15)(+0.14)+/- 0.18)x10(-3), where the errors are statistical, systematic including Monte Carlo modeling, theoretical, and from shape function parameter determination, respectively.
| Type: | Article |
|---|---|
| Title: | Determination of parallel to V-ub parallel to from measurements of the inclusive charmless semileptonic partial rates of B mesons using full reconstruction tags |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.95.241801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.95.241801 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | VERTICAL-BAR, BRANCHING RATIO, DECAYS, HADRONS, LEP |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/142731 |
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