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Title: 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-)=(-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:
 [1]
  1. 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}
}

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Works referencing / citing this record:

Updated measurement of decay-time-dependent C P asymmetries in D 0 K + K and D 0 π + π decays
journal, January 2020


Averages of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties as of summer 2016
journal, December 2017