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Improved measurement of CP observables in B-+/-->(DCPK +/-)-K-0 decays
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BABAR Collaboration (Including:
). (2008) Improved measurement of CP observables in B-+/-->(DCPK +/-)-K-0 decays. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.77 (No.11). article no. 111102. doi:10.1103/PhysRevD.77.111102 ISSN 1550-7998.Research output not available from this repository.
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Official URL: http://dx.doi.org/10.1103/PhysRevD.77.111102
Abstract
We present a study of the decay B-->(D(CP)K-)-K-0 and its charge conjugate, where D-(CP)(0) is reconstructed in both a non-CP flavor eigenstate and in CP (CP-even and CP-odd) eigenstates, based on a sample of 382 million Upsilon(4S) -> B (B) over bar decays collected with the BABAR detector at the PEP-II e(+)e(-) storage ring. We measure the direct CP asymmetries A(CP +/-) and the ratios of the branching fractions R-CP +/-: A(CP+)=0.27 +/- 0.09(stat) +/- 0.04(syst), A(CP-)=-0.09 +/- 0.09(stat) +/- 0.02(syst), RCP+=1.06 +/- 0.10(stat) +/- 0.05(syst), RCP-=1.03 +/- 0.10(stat) +/- 0.05(syst). We also express the results in terms of the so-called Cartesian coordinates x(+), x(-), and r(2): x(+)=-0.09 +/- 0.05(stat) +/- 0.02(syst), x(-)=0.10 +/- 0.05(stat) +/- 0.03(syst), r(2)=0.05 +/- 0.07(stat)+/- 0.03(syst). These results will help to better constrain the phase parameter gamma=arg(-VudVub*/VcdVcb*) of the Cabibbo-Kobayashi-Maskawa quark mixing matrix.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1550-7998 | ||||
| Official Date: | June 2008 | ||||
| Dates: |
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| Volume: | Vol.77 | ||||
| Number: | No.11 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | article no. 111102 | ||||
| DOI: | 10.1103/PhysRevD.77.111102 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published |
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