Acosta, D;
Adelman, J;
Affolder, T;
Akimoto, T;
Albrow, MG;
Ambrose, D;
Amerio, S;
... Zucchelli, S; + view all
(2005)
Measurement of the lifetime difference between B-s mass eigenstates.
Physical Review Letters
, 94
(10)
, Article 101803. 10.1103/PhysRevLett.94.101803.
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Abstract
We present measurements of the lifetimes and polarization amplitudes for B-s(0)-> J/psi phi and B-d(0)-> J/psi K-*0 decays. Lifetimes of the heavy and light mass eigenstates in the B-s(0) system are separately measured for the first time by determining the relative contributions of amplitudes with definite CP as a function of the decay time. Using 203 +/- 15 B-s(0) decays we obtain tau(L)=(1.05(-0.13)(+0.16)+/- 0.02) ps and tau(H)=(2.07(-0.46)(+0.58)+/- 0.03) ps. Expressed in terms of the difference Delta Gamma(s) and average Gamma(s), of the decay rates of the two eigenstates, the results are Delta Gamma(s)/Gamma(s)=(65(-33)(+25)+/- 1)% and Delta Gamma(s)=(0.47(-0.24)(+0.19)+/- 0.01) ps(-1).
| Type: | Article |
|---|---|
| Title: | Measurement of the lifetime difference between B-s mass eigenstates |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.94.101803 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.94.101803 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | ANGULAR-DISTRIBUTIONS, DECAY AMPLITUDES, PHI DECAYS, MESONS |
| 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 UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/136811 |
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