Aubert, B;
Barate, R;
Boutigny, D;
Couderc, F;
Karyotakis, Y;
Lees, JP;
Poireau, V;
... Neal, H; + view all
(2005)
Measurement of the branching fraction of Upsilon(4S)->(BB0)-B-0.
PHYS REV LETT
, 95
(4)
, Article 042001. 10.1103/PhysRevLett.95.042001.
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Abstract
We report the first measurement of the branching fraction f(00) for Upsilon(4S) -> B-0(B) over bar (0). The data sample consists of 81.7 fb(-1) collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)e(-) storage ring. Using partial reconstruction of the decay (B) over bar (0) -> D(*+)l(-)<(nu)over bar >(l) in which only the charged lepton and the soft pion from the decay D*+ -> D(0)pi(+) are reconstructed, we obtain f(00) = 0.487 +/- 0.010(stat) +/- 0.008(syst). Our result does not depend on the branching fractions of (B) over bar (0) -> D(*+)l(-)<(nu)over bar >(l) and D*+ -> D(0)pi(+) decays, on the ratio of the charged and neutral B meson lifetimes, nor on the assumption of isospin symmetry.
| Type: | Article |
|---|---|
| Title: | Measurement of the branching fraction of Upsilon(4S)->(BB0)-B-0 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.95.042001 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.95.042001 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | NEUTRAL B-MESONS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences 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/1303724 |
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