Abe, K;
Abe, K;
Abe, T;
Adachi, I;
Aihara, H;
Akai, K;
Akatsu, M;
... Belle Collaboration; + view all
(2003)
Measurement of time-dependent CP-violating asymmetries in B-0 ->phi K-S(0), (K+K-KS0), and eta K-'(S)0 decays.
PHYS REV LETT
, 91
(26)
, Article 261602. 10.1103/PhysRevLett.91.261602.
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Abstract
We present an improved measurement of CP-violation parameters in B-0-->phiK(S)(0), (K+K-KS0), and eta(')K(S)(0) decays based on a 140 fb(-1) data sample collected at the Y(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters for each of the three modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays. We find that the observed CP asymmetry in the B-->phiK(S)(0) decay differs from the standard model (SM) expectation by 3.5 standard deviations, while the other cases are consistent with the SM.
| Type: | Article |
|---|---|
| Title: | Measurement of time-dependent CP-violating asymmetries in B-0 ->phi K-S(0), (K+K-KS0), and eta K-'(S)0 decays |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.91.261602 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.91.261602 |
| Language: | English |
| Additional information: | © 2003 The American Physical Society |
| Keywords: | B-DECAYS |
| 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/1308412 |
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