Measurement of D(0)-(D)over-bar(0) mixing using the ratio of lifetimes for the decays D(0)-> K(-)pi(+), K(-)K(+), and pi(-)pi(+)
We present a measurement of D0-D̄0 mixing parameters using the ratios of lifetimes extracted from a sample of D0 mesons produced through the process D*+→D0π+, which decay to K-π+, K-K+, or π-π+. The lifetimes of the CP-even, Cabibbo-suppressed modes K-K+ and π-π+ are compared with that of the CP-mix...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2008
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| _version_ | 1797071801004589056 |
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| author | Aubert, B Bona, M Karyotakis, Y Lees, J Poireau, V Prudent, X Tisserand, V Zghiche, A Garra Tico, J Grauges, E Lopez, L Palano, A Pappagallo, M Eigen, G Stugu, B Sun, L Abrams, G Brown, D Button-Shafer, J Cahn, R Jacobsen, R Kadyk, J Kerth, LT Kolomensky, Y Kukartsev, G |
| author_facet | Aubert, B Bona, M Karyotakis, Y Lees, J Poireau, V Prudent, X Tisserand, V Zghiche, A Garra Tico, J Grauges, E Lopez, L Palano, A Pappagallo, M Eigen, G Stugu, B Sun, L Abrams, G Brown, D Button-Shafer, J Cahn, R Jacobsen, R Kadyk, J Kerth, LT Kolomensky, Y Kukartsev, G |
| author_sort | Aubert, B |
| collection | OXFORD |
| description | We present a measurement of D0-D̄0 mixing parameters using the ratios of lifetimes extracted from a sample of D0 mesons produced through the process D*+→D0π+, which decay to K-π+, K-K+, or π-π+. The lifetimes of the CP-even, Cabibbo-suppressed modes K-K+ and π-π+ are compared with that of the CP-mixed, Cabibbo-favored mode K-π+ to obtain a measurement of yCP, which in the limit of CP conservation corresponds to the mixing parameter y. The analysis is based on a data sample of 384fb-1 collected by the BABAR detector at the PEP-II asymmetric-energy e+e- collider. We obtain yCP=[1.24±0.39(stat)±0.13(syst)]%, which is evidence for D0-D̄0 mixing at the 3σ level, and ΔY=[-0.26±0.36(stat) ±0.08(syst)]%, where ΔY constrains possible CP violation. Combining this result with a previous BABAR measurement of yCP obtained from a separate sample of D0→K-K+ events, we obtain yCP=[1.03±0.33(stat)±0. 19(syst)]%. © 2008 The American Physical Society. |
| first_indexed | 2024-03-06T22:58:27Z |
| format | Journal article |
| id | oxford-uuid:613d5da2-b1a1-4960-9f4a-63ab92c851b5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:58:27Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:613d5da2-b1a1-4960-9f4a-63ab92c851b52022-03-26T17:58:37ZMeasurement of D(0)-(D)over-bar(0) mixing using the ratio of lifetimes for the decays D(0)-> K(-)pi(+), K(-)K(+), and pi(-)pi(+)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:613d5da2-b1a1-4960-9f4a-63ab92c851b5EnglishSymplectic Elements at Oxford2008Aubert, BBona, MKaryotakis, YLees, JPoireau, VPrudent, XTisserand, VZghiche, AGarra Tico, JGrauges, ELopez, LPalano, APappagallo, MEigen, GStugu, BSun, LAbrams, GBrown, DButton-Shafer, JCahn, RJacobsen, RKadyk, JKerth, LTKolomensky, YKukartsev, GWe present a measurement of D0-D̄0 mixing parameters using the ratios of lifetimes extracted from a sample of D0 mesons produced through the process D*+→D0π+, which decay to K-π+, K-K+, or π-π+. The lifetimes of the CP-even, Cabibbo-suppressed modes K-K+ and π-π+ are compared with that of the CP-mixed, Cabibbo-favored mode K-π+ to obtain a measurement of yCP, which in the limit of CP conservation corresponds to the mixing parameter y. The analysis is based on a data sample of 384fb-1 collected by the BABAR detector at the PEP-II asymmetric-energy e+e- collider. We obtain yCP=[1.24±0.39(stat)±0.13(syst)]%, which is evidence for D0-D̄0 mixing at the 3σ level, and ΔY=[-0.26±0.36(stat) ±0.08(syst)]%, where ΔY constrains possible CP violation. Combining this result with a previous BABAR measurement of yCP obtained from a separate sample of D0→K-K+ events, we obtain yCP=[1.03±0.33(stat)±0. 19(syst)]%. © 2008 The American Physical Society. |
| spellingShingle | Aubert, B Bona, M Karyotakis, Y Lees, J Poireau, V Prudent, X Tisserand, V Zghiche, A Garra Tico, J Grauges, E Lopez, L Palano, A Pappagallo, M Eigen, G Stugu, B Sun, L Abrams, G Brown, D Button-Shafer, J Cahn, R Jacobsen, R Kadyk, J Kerth, LT Kolomensky, Y Kukartsev, G Measurement of D(0)-(D)over-bar(0) mixing using the ratio of lifetimes for the decays D(0)-> K(-)pi(+), K(-)K(+), and pi(-)pi(+) |
| title | Measurement of D(0)-(D)over-bar(0) mixing using the ratio of lifetimes for the decays D(0)-> K(-)pi(+), K(-)K(+), and pi(-)pi(+) |
| title_full | Measurement of D(0)-(D)over-bar(0) mixing using the ratio of lifetimes for the decays D(0)-> K(-)pi(+), K(-)K(+), and pi(-)pi(+) |
| title_fullStr | Measurement of D(0)-(D)over-bar(0) mixing using the ratio of lifetimes for the decays D(0)-> K(-)pi(+), K(-)K(+), and pi(-)pi(+) |
| title_full_unstemmed | Measurement of D(0)-(D)over-bar(0) mixing using the ratio of lifetimes for the decays D(0)-> K(-)pi(+), K(-)K(+), and pi(-)pi(+) |
| title_short | Measurement of D(0)-(D)over-bar(0) mixing using the ratio of lifetimes for the decays D(0)-> K(-)pi(+), K(-)K(+), and pi(-)pi(+) |
| title_sort | measurement of d 0 d over bar 0 mixing using the ratio of lifetimes for the decays d 0 gt k pi k k and pi pi |
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