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Measurement of CP-violating asymmetries in D0→π +π - and D0→K +K - decays at CDF

Publication ,  Journal Article
Aaltonen, T; Alvarez González, B; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Appel, JA; Arisawa, T; Artikov, A ...
Published in: Physical Review D - Particles, Fields, Gravitation and Cosmology
January 27, 2012
Published version (DOI)

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.

Duke Scholars

Alfred T. Goshaw
Author Alfred T. Goshaw Physics
Ashutosh V. Kotwal
Author Ashutosh V. Kotwal Physics
Mark C. Kruse
Author Mark C. Kruse Physics
Seog Oh
Author Seog Oh Physics
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Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

10.1103/PhysRevD.85.012009

EISSN

1550-2368

ISSN

1550-7998

Publication Date

January 27, 2012

Volume

85

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

Citation

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MLA
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Aaltonen, T., Alvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., … D’errico, M. (2012). Measurement of CP-violating asymmetries in D0→π +π - and D0→K +K - decays at CDF. Physical Review D - Particles, Fields, Gravitation and Cosmology, 85(1). https://doi.org/10.1103/PhysRevD.85.012009
Aaltonen, T., B. Alvarez González, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, et al. “Measurement of CP-violating asymmetries in D0→π +π - and D0→K +K - decays at CDF.” Physical Review D - Particles, Fields, Gravitation and Cosmology 85, no. 1 (January 27, 2012). https://doi.org/10.1103/PhysRevD.85.012009.
Aaltonen T, Alvarez González B, Amerio S, Amidei D, Anastassov A, Annovi A, et al. Measurement of CP-violating asymmetries in D0→π +π - and D0→K +K - decays at CDF. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2012 Jan 27;85(1).
Aaltonen, T., et al. “Measurement of CP-violating asymmetries in D0→π +π - and D0→K +K - decays at CDF.” Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 85, no. 1, Jan. 2012. Scopus, doi:10.1103/PhysRevD.85.012009.
Aaltonen T, Alvarez González B, Amerio S, Amidei D, Anastassov A, Annovi A, Antos J, Apollinari G, Appel JA, Arisawa T, Artikov A, Asaadi J, Ashmanskas W, Auerbach B, Aurisano A, Azfar F, Badgett W, Bae T, Barbaro-Galtieri A, Barnes VE, Barnett BA, Barria P, Bartos P, Bauce M, Bedeschi F, Behari S, Bellettini G, Bellinger J, Benjamin D, Beretvas A, Bhatti A, Bisello D, Bizjak I, Bland KR, Blumenfeld B, Bocci A, Bodek A, Bortoletto D, Boudreau J, Boveia A, Brigliadori L, Bromberg C, Brucken E, Budagov J, Budd HS, Burkett K, Busetto G, Bussey P, Buzatu A, Calamba A, Calancha C, Camarda S, Campanelli M, Campbell M, Canelli F, Carls B, Carlsmith D, Carosi R, Carrillo S, Carron S, Casal B, Casarsa M, Castro A, Catastini P, Cauz D, Cavaliere V, Cavalli-Sforza M, Cerri A, Cerrito L, Chen YC, Chertok M, Chiarelli G, Chlachidze G, Chlebana F, Cho K, Chokheli D, Chung WH, Chung YS, Ciocci MA, Clark A, Clarke C, Compostella G, Convery ME, Conway J, Corbo M, Cordelli M, Cox CA, Cox DJ, Crescioli F, Cuevas J, Culbertson R, Dagenhart D, D’ascenzo N, Datta M, De Barbaro P, Dell’orso M, Demortier L, Deninno M, Devoto F, D’errico M. Measurement of CP-violating asymmetries in D0→π +π - and D0→K +K - decays at CDF. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2012 Jan 27;85(1).

Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

10.1103/PhysRevD.85.012009

EISSN

1550-2368

ISSN

1550-7998

Publication Date

January 27, 2012

Volume

85

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences