Lifetime differences, direct CP violation, and partial widths in D0 meson decays to K+K- and π+ π-

S. E. Csorna; I. Danko; K. W. McLean; Z. Xu; R. Godang; G. Bonvicini; D. Cinabro; M. Dubrovin; S. McGee; A. Bornheim; E. Lipeles; S. P. Pappas; A. Shapiro; W. M. Sun; A. J. Weinstein; D. E. Jaffe; R. Mahapatra; G. Masek; H. P. Paar; D. M. Asner; T. S. Hill; R. J. Morrison; H. N. Nelson; R. A. Briere; G. P. Chen; T. Ferguson; H. Vogel; J. P. Alexander; C. Bebek; K. Berkelman; F. Blanc; V. Boisvert; D. G. Cassel; P. S. Drell; J. E. Duboscq; K. M. Ecklund; R. Ehrlich; L. Gibbons; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; L. Hsu; C. D. Jones; J. Kandaswamy; D. L. Kreinick; M. Lohner; A. Magerkurth; H. Mahlke-Krüger; T. O. Meyer

doi:10.1103/PhysRevD.65.092001

Lifetime differences, direct CP violation, and partial widths in D⁰ meson decays to K⁺K^- and π⁺ π^-

S. E. Csorna
, I. Danko
, K. W. McLean
, Z. Xu
, R. Godang
, G. Bonvicini
, D. Cinabro
, M. Dubrovin
, S. McGee
, A. Bornheim
, E. Lipeles
, S. P. Pappas
, A. Shapiro
, W. M. Sun
, A. J. Weinstein
, D. E. Jaffe
, R. Mahapatra
, G. Masek
, H. P. Paar
, D. M. Asner

T. S. Hill, R. J. Morrison, H. N. Nelson, R. A. Briere, G. P. Chen, T. Ferguson, H. Vogel, J. P. Alexander, C. Bebek, K. Berkelman, F. Blanc, V. Boisvert, D. G. Cassel, P. S. Drell, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, M. Lohner, A. Magerkurth, H. Mahlke-Krüger, T. O. Meyer

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

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Abstract

We describe several measurements using the decays D⁰→K⁺K^- and π⁺π^-. We find the ratio of partial widths, Γ(D⁰→K⁺K^-)/Γ (D⁰→π⁺π^-), to be 2.96±0.16±0.15, where the first error is statistical and the second is systematic. We observe no evidence for direct CP violation, obtaining A_CP(KK)=(0.0±2.2±0.8)% and A_CP(ππ)=(1.9±3.2±0.8)%. In the limit of no CP violation we measure the mixing parameter y_CP=-0.012±0.025±0.014 by measuring the lifetime difference between D⁰→K⁺K^- or π⁺ π^- and the CP neutral state, D⁰→K^-π⁺. We see no evidence for mixing.

Original language	English (US)
Pages (from-to)	920011-920018
Number of pages	8
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	65
Issue number	9 A
DOIs	https://doi.org/10.1103/PhysRevD.65.092001
State	Published - May 1 2002

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10.1103/PhysRevD.65.092001

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Csorna, S. E., Danko, I., McLean, K. W., Xu, Z., Godang, R., Bonvicini, G., Cinabro, D., Dubrovin, M., McGee, S., Bornheim, A., Lipeles, E., Pappas, S. P., Shapiro, A., Sun, W. M., Weinstein, A. J., Jaffe, D. E., Mahapatra, R., Masek, G., Paar, H. P., ... Meyer, T. O. (2002). Lifetime differences, direct CP violation, and partial widths in D⁰ meson decays to K⁺K^- and π⁺ π^-. Physical Review D - Particles, Fields, Gravitation and Cosmology, 65(9 A), 920011-920018. https://doi.org/10.1103/PhysRevD.65.092001

Csorna, SE, Danko, I, McLean, KW, Xu, Z, Godang, R, Bonvicini, G, Cinabro, D, Dubrovin, M, McGee, S, Bornheim, A, Lipeles, E, Pappas, SP, Shapiro, A, Sun, WM, Weinstein, AJ, Jaffe, DE, Mahapatra, R, Masek, G, Paar, HP, Asner, DM, Hill, TS, Morrison, RJ, Nelson, HN, Briere, RA, Chen, GP, Ferguson, T, Vogel, H, Alexander, JP, Bebek, C, Berkelman, K, Blanc, F, Boisvert, V, Cassel, DG, Drell, PS, Duboscq, JE, Ecklund, KM, Ehrlich, R, Gibbons, L, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Hsu, L, Jones, CD, Kandaswamy, J, Kreinick, DL, Lohner, M, Magerkurth, A, Mahlke-Krüger, H & Meyer, TO 2002, 'Lifetime differences, direct CP violation, and partial widths in D⁰ meson decays to K⁺K^- and π⁺ π^-', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 65, no. 9 A, pp. 920011-920018. https://doi.org/10.1103/PhysRevD.65.092001

@article{9dfdc767404e47bca5526e13f5e9e26c,

title = "Lifetime differences, direct CP violation, and partial widths in D0 meson decays to K+K- and π+ π-",

abstract = "We describe several measurements using the decays D0→K+K- and π+π-. We find the ratio of partial widths, Γ(D0→K+K-)/Γ (D0→π+π-), to be 2.96±0.16±0.15, where the first error is statistical and the second is systematic. We observe no evidence for direct CP violation, obtaining ACP(KK)=(0.0±2.2±0.8)\% and ACP(ππ)=(1.9±3.2±0.8)\%. In the limit of no CP violation we measure the mixing parameter yCP=-0.012±0.025±0.014 by measuring the lifetime difference between D0→K+K- or π+ π- and the CP neutral state, D0→K-π+. We see no evidence for mixing.",

author = "Csorna, \{S. E.\} and I. Danko and McLean, \{K. W.\} and Z. Xu and R. Godang and G. Bonvicini and D. Cinabro and M. Dubrovin and S. McGee and A. Bornheim and E. Lipeles and Pappas, \{S. P.\} and A. Shapiro and Sun, \{W. M.\} and Weinstein, \{A. J.\} and Jaffe, \{D. E.\} and R. Mahapatra and G. Masek and Paar, \{H. P.\} and Asner, \{D. M.\} and Hill, \{T. S.\} and Morrison, \{R. J.\} and Nelson, \{H. N.\} and Briere, \{R. A.\} and Chen, \{G. P.\} and T. Ferguson and H. Vogel and Alexander, \{J. P.\} and C. Bebek and K. Berkelman and F. Blanc and V. Boisvert and Cassel, \{D. G.\} and Drell, \{P. S.\} and Duboscq, \{J. E.\} and Ecklund, \{K. M.\} and R. Ehrlich and L. Gibbons and B. Gittelman and Gray, \{S. W.\} and Hartill, \{D. L.\} and Heltsley, \{B. K.\} and L. Hsu and Jones, \{C. D.\} and J. Kandaswamy and Kreinick, \{D. L.\} and M. Lohner and A. Magerkurth and H. Mahlke-Kr{\"u}ger and Meyer, \{T. O.\}",

year = "2002",

month = may,

day = "1",

doi = "10.1103/PhysRevD.65.092001",

language = "English (US)",

volume = "65",

pages = "920011--920018",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

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number = "9 A",

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T1 - Lifetime differences, direct CP violation, and partial widths in D0 meson decays to K+K- and π+ π-

AU - Csorna, S. E.

AU - Danko, I.

AU - McLean, K. W.

AU - Xu, Z.

AU - Godang, R.

AU - Bonvicini, G.

AU - Cinabro, D.

AU - Dubrovin, M.

AU - McGee, S.

AU - Bornheim, A.

AU - Lipeles, E.

AU - Pappas, S. P.

AU - Shapiro, A.

AU - Sun, W. M.

AU - Weinstein, A. J.

AU - Jaffe, D. E.

AU - Mahapatra, R.

AU - Masek, G.

AU - Paar, H. P.

AU - Asner, D. M.

AU - Hill, T. S.

AU - Morrison, R. J.

AU - Nelson, H. N.

AU - Briere, R. A.

AU - Chen, G. P.

AU - Ferguson, T.

AU - Vogel, H.

AU - Alexander, J. P.

AU - Bebek, C.

AU - Berkelman, K.

AU - Blanc, F.

AU - Boisvert, V.

AU - Cassel, D. G.

AU - Drell, P. S.

AU - Duboscq, J. E.

AU - Ecklund, K. M.

AU - Ehrlich, R.

AU - Gibbons, L.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hsu, L.

AU - Jones, C. D.

AU - Kandaswamy, J.

AU - Kreinick, D. L.

AU - Lohner, M.

AU - Magerkurth, A.

AU - Mahlke-Krüger, H.

AU - Meyer, T. O.

PY - 2002/5/1

Y1 - 2002/5/1

N2 - We describe several measurements using the decays D0→K+K- and π+π-. We find the ratio of partial widths, Γ(D0→K+K-)/Γ (D0→π+π-), to be 2.96±0.16±0.15, where the first error is statistical and the second is systematic. We observe no evidence for direct CP violation, obtaining ACP(KK)=(0.0±2.2±0.8)% and ACP(ππ)=(1.9±3.2±0.8)%. In the limit of no CP violation we measure the mixing parameter yCP=-0.012±0.025±0.014 by measuring the lifetime difference between D0→K+K- or π+ π- and the CP neutral state, D0→K-π+. We see no evidence for mixing.

AB - We describe several measurements using the decays D0→K+K- and π+π-. We find the ratio of partial widths, Γ(D0→K+K-)/Γ (D0→π+π-), to be 2.96±0.16±0.15, where the first error is statistical and the second is systematic. We observe no evidence for direct CP violation, obtaining ACP(KK)=(0.0±2.2±0.8)% and ACP(ππ)=(1.9±3.2±0.8)%. In the limit of no CP violation we measure the mixing parameter yCP=-0.012±0.025±0.014 by measuring the lifetime difference between D0→K+K- or π+ π- and the CP neutral state, D0→K-π+. We see no evidence for mixing.

UR - https://www.scopus.com/pages/publications/85038273586

UR - https://www.scopus.com/inward/citedby.url?scp=85038273586&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.65.092001

DO - 10.1103/PhysRevD.65.092001

M3 - Article

AN - SCOPUS:3542992521

SN - 0556-2821

VL - 65

SP - 920011

EP - 920018

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 9 A

ER -

Lifetime differences, direct CP violation, and partial widths in D⁰ meson decays to K⁺K^- and π⁺ π^-

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