Measurement of CP-violating asymmetries in D-0 -> pi(+) pi(-) and D-0 -> K+ K- decays at CDF
We report on a measurement of CP-violating asymmetries (A CP) in the Cabibbo-suppressed D0→π +π - and D0→K +K - decays reconstructed in a data sample corresponding to 5.9fb -1 of integrated luminosity collected by the upgraded Collider Detector at Fermilab. We use the strong decay D *+→D0π + to iden...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2012
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| _version_ | 1797095351413374976 |
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| author | Aaltonen, T Alvarez Gonzalez, B Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Apollinari, G Appel, J Arisawa, T Artikov, A Asaadi, J Ashmanskas, W Auerbach, B Aurisano, A Azfar, F Badgett, W Bae, T Barbaro-Galtieri, A Barnes, V Barnett, B Barria, P Bartos, P Bauce, M Bedeschi, F |
| author_facet | Aaltonen, T Alvarez Gonzalez, B Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Apollinari, G Appel, J Arisawa, T Artikov, A Asaadi, J Ashmanskas, W Auerbach, B Aurisano, A Azfar, F Badgett, W Bae, T Barbaro-Galtieri, A Barnes, V Barnett, B Barria, P Bartos, P Bauce, M Bedeschi, F |
| author_sort | Aaltonen, T |
| collection | OXFORD |
| description | We report on a measurement of CP-violating asymmetries (A CP) in the Cabibbo-suppressed D0→π +π - and D0→K +K - decays reconstructed in a data sample corresponding to 5.9fb -1 of integrated luminosity collected by the upgraded Collider Detector at Fermilab. We use the strong decay D *+→D0π + to identify the flavor of the charmed meson at production and exploit CP-conserving strong cc̄ pair production in pp̄ collisions. High-statistics samples of Cabibbo-favored D0→K -π + decays with and without a D *± tag are used to correct for instrumental effects and significantly reduce systematic uncertainties. We measure A CP(D0→π +π -)=(+0.22±0.24(stat) ±0.11(syst))% and A CP(D0→K +K -)=(-0.24±0.22(stat)±0.09(syst))%, in agreement with CP conservation. These are the most precise determinations from a single experiment to date. Under the assumption of negligible direct CP violation in D0→π +π - and D0→K +K - decays, the results provide an upper limit to the CP-violating asymmetry in D0 mixing, |ACPind(D0)|<0.13% at the 90% confidence level. © 2012 American Physical Society. |
| first_indexed | 2024-03-07T04:26:40Z |
| format | Journal article |
| id | oxford-uuid:ccdfd90e-f822-4102-bb4c-49db3cc9361c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:26:40Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:ccdfd90e-f822-4102-bb4c-49db3cc9361c2022-03-27T07:24:51ZMeasurement of CP-violating asymmetries in D-0 -> pi(+) pi(-) and D-0 -> K+ K- decays at CDFJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ccdfd90e-f822-4102-bb4c-49db3cc9361cEnglishSymplectic Elements at Oxford2012Aaltonen, TAlvarez Gonzalez, BAmerio, SAmidei, DAnastassov, AAnnovi, AAntos, JApollinari, GAppel, JArisawa, TArtikov, AAsaadi, JAshmanskas, WAuerbach, BAurisano, AAzfar, FBadgett, WBae, TBarbaro-Galtieri, ABarnes, VBarnett, BBarria, PBartos, PBauce, MBedeschi, FWe report on a measurement of CP-violating asymmetries (A CP) in the Cabibbo-suppressed D0→π +π - and D0→K +K - decays reconstructed in a data sample corresponding to 5.9fb -1 of integrated luminosity collected by the upgraded Collider Detector at Fermilab. We use the strong decay D *+→D0π + to identify the flavor of the charmed meson at production and exploit CP-conserving strong cc̄ pair production in pp̄ collisions. High-statistics samples of Cabibbo-favored D0→K -π + decays with and without a D *± tag are used to correct for instrumental effects and significantly reduce systematic uncertainties. We measure A CP(D0→π +π -)=(+0.22±0.24(stat) ±0.11(syst))% and A CP(D0→K +K -)=(-0.24±0.22(stat)±0.09(syst))%, in agreement with CP conservation. These are the most precise determinations from a single experiment to date. Under the assumption of negligible direct CP violation in D0→π +π - and D0→K +K - decays, the results provide an upper limit to the CP-violating asymmetry in D0 mixing, |ACPind(D0)|<0.13% at the 90% confidence level. © 2012 American Physical Society. |
| spellingShingle | Aaltonen, T Alvarez Gonzalez, B Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Apollinari, G Appel, J Arisawa, T Artikov, A Asaadi, J Ashmanskas, W Auerbach, B Aurisano, A Azfar, F Badgett, W Bae, T Barbaro-Galtieri, A Barnes, V Barnett, B Barria, P Bartos, P Bauce, M Bedeschi, F Measurement of CP-violating asymmetries in D-0 -> pi(+) pi(-) and D-0 -> K+ K- decays at CDF |
| title | Measurement of CP-violating asymmetries in D-0 -> pi(+) pi(-) and D-0 -> K+ K- decays at CDF |
| title_full | Measurement of CP-violating asymmetries in D-0 -> pi(+) pi(-) and D-0 -> K+ K- decays at CDF |
| title_fullStr | Measurement of CP-violating asymmetries in D-0 -> pi(+) pi(-) and D-0 -> K+ K- decays at CDF |
| title_full_unstemmed | Measurement of CP-violating asymmetries in D-0 -> pi(+) pi(-) and D-0 -> K+ K- decays at CDF |
| title_short | Measurement of CP-violating asymmetries in D-0 -> pi(+) pi(-) and D-0 -> K+ K- decays at CDF |
| title_sort | measurement of cp violating asymmetries in d 0 gt pi pi and d 0 gt k k decays at cdf |
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