Measurement of indirect CP-violating asymmetries in D0→K+K- and D0→π+π- decays at CDF
Abstract
We report a measurement of the indirect CP-violating asymmetries (AΓ) between effective lifetimes of anticharm and charm mesons reconstructed in D0→K+K- and D0→π+π- decays. We use the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab experiment and corresponding to 9.7 fb-1 of integrated luminosity. The strong-interaction decay D*+→D0π+ is used to identify the meson at production as D0 or D¯0. We statistically subtract D0 and D¯0 mesons originating from b-hadron decays and measure the yield asymmetry between anticharm and charm decays as a function of decay time. We measure AΓ(K+K-)=(-0.19±0.15(stat)±0.04(syst))%and AΓ(π+π-)=(-0.01±0.18(stat)±0.03(syst))%. The results are consistent with the hypothesis of CP symmetry and their combination yields AΓ=(-0.12±0.12)%.
- Authors:
-
- Univ. of Helsinki (Finland). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- CDF Collaboration
- OSTI Identifier:
- 1226298
- Alternate Identifier(s):
- OSTI ID: 1180624
- Report Number(s):
- FERMILAB-PUB-14-429-PPD
Journal ID: ISSN 1550-7998; arXiv eprint number arXiv:1410.5435; TRN: US1600942
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 90; Journal Issue: 11; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Aaltonen, Timo Antero. Measurement of indirect CP-violating asymmetries in D0→K+K- and D0→π+π- decays at CDF. United States: N. p., 2014.
Web. doi:10.1103/PhysRevD.90.111103.
Aaltonen, Timo Antero. Measurement of indirect CP-violating asymmetries in D0→K+K- and D0→π+π- decays at CDF. United States. https://doi.org/10.1103/PhysRevD.90.111103
Aaltonen, Timo Antero. Tue .
"Measurement of indirect CP-violating asymmetries in D0→K+K- and D0→π+π- decays at CDF". United States. https://doi.org/10.1103/PhysRevD.90.111103. https://www.osti.gov/servlets/purl/1226298.
@article{osti_1226298,
title = {Measurement of indirect CP-violating asymmetries in D0→K+K- and D0→π+π- decays at CDF},
author = {Aaltonen, Timo Antero},
abstractNote = {We report a measurement of the indirect CP-violating asymmetries (AΓ) between effective lifetimes of anticharm and charm mesons reconstructed in D0→K+K- and D0→π+π- decays. We use the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab experiment and corresponding to 9.7 fb-1 of integrated luminosity. The strong-interaction decay D*+→D0π+ is used to identify the meson at production as D0 or D¯0. We statistically subtract D0 and D¯0 mesons originating from b-hadron decays and measure the yield asymmetry between anticharm and charm decays as a function of decay time. We measure AΓ(K+K-)=(-0.19±0.15(stat)±0.04(syst))%and AΓ(π+π-)=(-0.01±0.18(stat)±0.03(syst))%. The results are consistent with the hypothesis of CP symmetry and their combination yields AΓ=(-0.12±0.12)%.},
doi = {10.1103/PhysRevD.90.111103},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 11,
volume = 90,
place = {United States},
year = {Tue Dec 30 00:00:00 EST 2014},
month = {Tue Dec 30 00:00:00 EST 2014}
}
Web of Science
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Works referencing / citing this record:
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