Precision Measurement of CP Violation in $D0̂\to\pi+̂\pi-̂$ at CDF. PDF Download
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Languages : en
Pages : 6
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We report a preliminary measurement of the CP violating asymmetry in D° →??− using approximately 215,000 decays reconstructed in about 5.94/fb of CDF data. We use the strong D* ± D°?+ decay (D* tag) to identify the flavor of the charmed meson at production time and exploit CP-conserving strong c-{bar c} pair-production in p-{bar p} collisions. Higher statistic samples of Cabibbo-favored D° → K−?+ decays with and without D* tag are used to highly suppress systematic uncertainties due to detector effects. The result is the world's most precise measurement to date.
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Languages : en
Pages : 6
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We report a preliminary measurement of the CP violating asymmetry in D° →??− using approximately 215,000 decays reconstructed in about 5.94/fb of CDF data. We use the strong D* ± D°?+ decay (D* tag) to identify the flavor of the charmed meson at production time and exploit CP-conserving strong c-{bar c} pair-production in p-{bar p} collisions. Higher statistic samples of Cabibbo-favored D° → K−?+ decays with and without D* tag are used to highly suppress systematic uncertainties due to detector effects. The result is the world's most precise measurement to date.
![CP Violation in the D0 -] Pi+ Pi- Decay at CDF. PDF](https://books.google.com/books/content/images/frontcover/WPLGwQEACAAJ?fife=w80-h100)
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Languages : en
Pages : 5
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We report a measurement of the CP violating asymmetry in D° →??− decays using approximately 215,000 decays reconstructed in about 5.94 fb−1 of CDF data. We use the strong D*+ → D°?+ decay ('D* tag') to identify the flavor of the charmed meson at production time and exploit CP-conserving strong c{bar c} pair-production in p{bar p} collisions. Higher statistic samples of Cabibbo-favored D° → K−?+ decays with and without D* tag are used to highly suppress systematic uncertainties due to detector effects. The result, A{sub CP}(D° →?+?−) = [0.22 ± 0.24 (stat.) ± 0.11 (syst.)]%, is the world's most precise measurement to date and it is fully consistent with no CP violation.
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Languages : en
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We summarize the prospects of measuring the CP asymmetry in B[sup 0][r-arrow] J/[psi]K[sup 0][sub s] and B[sup 0][r-arrow][pi][sup+][pi][sub -] with the CDF detector in Run II in 1999. We also explore the feasibility to determine sin 2[gamma] and discuss Run I results relevant to measurement of CP violation at CDF.
![Measurement of CP-violating Asymmetries in the Do ->[pi]+[pi]- and Do->K+K- Decays at CDF PDF](https://books.google.com/books/content/images/frontcover/aVYYjwEACAAJ?fife=w80-h100)
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Languages : en
Pages : 142
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![Measurement of CP-violating Asymmetries in the D0 - [pi]+ [pi]- and D0 - K+ K- Decays at CDF PDF](https://books.google.com/books/content/images/frontcover/YCSKAQAACAAJ?fife=w80-h100)
Author: Angelo Di Canto
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Languages : en
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Author: Markus Röhrken
Publisher: Springer Science & Business Media
ISBN: 3319007262
Category : Science
Languages : en
Pages : 205
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This thesis describes a high-quality, high-precision method for the data analysis of an interesting elementary particle reaction. The data was collected at the Japanese B-meson factory KEKB with the Belle detector, one of the most successful large-scale experiments worldwide. CP violation is a subtle quantum effect that makes the world look different when simultaneously left and right and matter and antimatter are exchanged. This being a prerequisite for our own world to have developed from the big bang, there are only a few experimental indications of such effects, and their detection requires very intricate techniques. The discovery of CP violation in B meson decays garnered Kobayashi and Maskawa, who had predicted these findings as early as 1973, the 2008 Nobel prize in physics. This thesis describes in great detail what are by far the best measurements of branching ratios and CP violation parameters in two special reactions with two charm mesons in the final state. It presents an in-depth but accessible overview of the theory, phenomenology, experimental setup, data collection, Monte Carlo simulations, (blind) statistical data analysis, and systematic uncertainty studies.
Author: Angelo Di Canto
Publisher:
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Category :
Languages : en
Pages : 0
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![Measurement of Indirect CP-violating Asymmetries in D02!+K- and D02!pi]+[pi]- Decays at CDF. PDF](https://books.google.com/books/content/images/frontcover/kiSmAQAACAAJ?fife=w80-h100)
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Languages : en
Pages :
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![A High Sensitivity Search for CP Violating Rare K[sub L] Decays and Precision Measurement of the Direct CP Violation Parameter [epsilon][prime]/[epsilon] Via the Four K [yields] 2[pi] Decay Modes, Task J. PDF](https://books.google.com/books/content/images/frontcover/MKLjwQEACAAJ?fife=w80-h100)
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Languages : en
Pages : 8
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Fermilab experiments E731, E773, E799, and E832 are a series of experiments to investigate the physics of CP violation, CPT violation, and rare decays of the neutral kaon system. E731 finished data taking in 1988, during past year the full data set analysis was completed and yielded ([var epsilon][prime]/[var epsilon])[sub 2[pi]]=(7.4 [plus minus] 5.2 [stat] [plus minus] 2.9 [syst]) [times] 10[sup [minus]4] . The value favors a high top ark mass value within the Standard Model. E773 tests CPT violation by determining ([Delta][phi])[sub 2[pi]] with an accuracy of about 0.5[sup 0]. Data were taken during the last Fermilab Fixed Target run period between September and November 1991. It is anticipated the data analysis will be finished within a year. E799, with the primary goal of observing direct Cp Violation via searching for the rare decay K[sub L][yields] [pi][sup 0] l [sup +]l[sup [minus]] (where l = e, [mu] [nu]) took test data between November 1991 and January 1992 (Phase 1). Some preliminary results are shown here. E799 (Phase II) and E832 (a follow up experiment of E731) are scheduled to take data after the current Fermilab collider run with a new facility and detector.
Author: Angelo Di Canto
Publisher:
ISBN:
Category :
Languages : en
Pages : 142
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