Branching fractions for D0 → K+K- and D0 → π+π-, and a search for CP violation in D0 decays

E. M. Aitala; S. Amato; J. C. Anjos; J. A. Appel; D. Ashery; S. Banerjee; I. Bediaga; G. Blaylock; S. B. Bracker; P. R. Burchat; R. A. Burnstein; T. Carter; H. S. Carvalho; N. J. Copty; L. M. Cremaldi; C. Darling; K. Denisenko; A. Fernandez; G. Fox; P. Gagnon; C. Gobel; K. Gounder; A. M. Halling; G. Herrera; G. Hurvits; C. James; P. A. Kasper; S. Kwan; D. C. Langs; J. Leslie; B. Lundberg; S. Maytal-Beck; B. Meadows; J. R.T. De Mello Neto; R. H. Milburn; J. M. De Miranda; A. Napier; A. Nguyen; A. B. D'Oliveira; K. O'Shaughnessy; K. C. Peng; L. P. Perera; M. V. Purohit; B. Quinn; S. Radeztsky; A. Rafatian; N. W. Reay; J. J. Reidy; A. C. Dos Reis; H. A. Rubin; D. A. Sanders; A. K.S. Santha; A. F.S. Santoro; A. J. Schwartz; M. Sheaff; R. A. Sidwell; A. J. Slaughter; M. D. Sokoloff; J. Solano; N. R. Stanton; K. Stenson; D. J. Summers; S. Takach; K. Thorne; A. K. Tripathi; S. Watanabe; R. Weiss-Babai; J. Wiener; N. Witchey; E. Wolin; D. Yi; S. Yoshida; R. Zaliznyak; C. Zhang

doi:10.1016/S0370-2693(97)01570-0

Branching fractions for D⁰ → K⁺K^- and D⁰ → π⁺π^-, and a search for CP violation in D⁰ decays

E. M. Aitala, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery, S. Banerjee, I. Bediaga, G. Blaylock, S. B. Bracker, P. R. Burchat, R. A. Burnstein, T. Carter, H. S. Carvalho, N. J. Copty, L. M. Cremaldi, C. Darling, K. Denisenko, A. Fernandez, G. Fox, P. GagnonC. Gobel, K. Gounder, A. M. Halling, G. Herrera, G. Hurvits, C. James, P. A. Kasper, S. Kwan, D. C. Langs, J. Leslie, B. Lundberg, S. Maytal-Beck, B. Meadows, J. R.T. De Mello Neto, R. H. Milburn, J. M. De Miranda, A. Napier, A. Nguyen, A. B. D'Oliveira, K. O'Shaughnessy, K. C. Peng, L. P. Perera, M. V. Purohit, B. Quinn, S. Radeztsky, A. Rafatian, N. W. Reay, J. J. Reidy, A. C. Dos Reis, H. A. Rubin, D. A. Sanders, A. K.S. Santha, A. F.S. Santoro, A. J. Schwartz, M. Sheaff, R. A. Sidwell, A. J. Slaughter, M. D. Sokoloff, J. Solano, N. R. Stanton, K. Stenson, D. J. Summers, S. Takach, K. Thorne, A. K. Tripathi, S. Watanabe, R. Weiss-Babai, J. Wiener, N. Witchey, E. Wolin, D. Yi, S. Yoshida, R. Zaliznyak, C. Zhang

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Abstract

Using the large hadroproduced charm sample collected in experiment E791 at Fermilab, we have measured ratios of branching fractions for the two-body singly-Cabibbo-suppressed charged decays of the D⁰: Γ(D⁰ → K⁺K^-)/Γ(D⁰ → K^-π⁺) = 0.109 ± 0.003 ± 0.003, Γ(D⁰ → π⁺π^-)/Γ(D⁰ → K^-π⁺) = 0.040 ± 0.002 ± 0.003, and Γ(D⁰ → K⁺K^-)/Γ(D⁰ → π⁺π^-) = 2.75 ± 0.15 ± 0.16. We have looked for differences in the decay rates of D⁰ and D̄⁰ to the CP eigenstates K⁺K^- and π⁺π^-, and have measured the CP asymmetry parameters A_CP(K⁺K^-) = -0.010 ± 0.049 ± 0.012 and A_CP(π⁺π^-) = -0.049 ± 0.078 ± 0.030, both consistent with zero.

Original language	English
Pages (from-to)	405-411
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	421
Issue number	1-4
DOIs	https://doi.org/10.1016/S0370-2693(97)01570-0
State	Published - 5 Mar 1998
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/S0370-2693(97)01570-0

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Aitala, E. M., Amato, S., Anjos, J. C., Appel, J. A., Ashery, D., Banerjee, S., Bediaga, I., Blaylock, G., Bracker, S. B., Burchat, P. R., Burnstein, R. A., Carter, T., Carvalho, H. S., Copty, N. J., Cremaldi, L. M., Darling, C., Denisenko, K., Fernandez, A., Fox, G., ... Zhang, C. (1998). Branching fractions for D⁰ → K⁺K^- and D⁰ → π⁺π^-, and a search for CP violation in D⁰ decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 421(1-4), 405-411. https://doi.org/10.1016/S0370-2693(97)01570-0

@article{96442f76fd984ebdb3ef9bc502794426,

title = "Branching fractions for D0 → K+K- and D0 → π+π-, and a search for CP violation in D0 decays",

abstract = "Using the large hadroproduced charm sample collected in experiment E791 at Fermilab, we have measured ratios of branching fractions for the two-body singly-Cabibbo-suppressed charged decays of the D0: Γ(D0 → K+K-)/Γ(D0 → K-π+) = 0.109 ± 0.003 ± 0.003, Γ(D0 → π+π-)/Γ(D0 → K-π+) = 0.040 ± 0.002 ± 0.003, and Γ(D0 → K+K-)/Γ(D0 → π+π-) = 2.75 ± 0.15 ± 0.16. We have looked for differences in the decay rates of D0 and {\=D}0 to the CP eigenstates K+K- and π+π-, and have measured the CP asymmetry parameters ACP(K+K-) = -0.010 ± 0.049 ± 0.012 and ACP(π+π-) = -0.049 ± 0.078 ± 0.030, both consistent with zero.",

author = "Aitala, \{E. M.\} and S. Amato and Anjos, \{J. C.\} and Appel, \{J. A.\} and D. Ashery and S. Banerjee and I. Bediaga and G. Blaylock and Bracker, \{S. B.\} and Burchat, \{P. R.\} and Burnstein, \{R. A.\} and T. Carter and Carvalho, \{H. S.\} and Copty, \{N. J.\} and Cremaldi, \{L. M.\} and C. Darling and K. Denisenko and A. Fernandez and G. Fox and P. Gagnon and C. Gobel and K. Gounder and Halling, \{A. M.\} and G. Herrera and G. Hurvits and C. James and Kasper, \{P. A.\} and S. Kwan and Langs, \{D. C.\} and J. Leslie and B. Lundberg and S. Maytal-Beck and B. Meadows and \{De Mello Neto\}, \{J. R.T.\} and Milburn, \{R. H.\} and \{De Miranda\}, \{J. M.\} and A. Napier and A. Nguyen and D'Oliveira, \{A. B.\} and K. O'Shaughnessy and Peng, \{K. C.\} and Perera, \{L. P.\} and Purohit, \{M. V.\} and B. Quinn and S. Radeztsky and A. Rafatian and Reay, \{N. W.\} and Reidy, \{J. J.\} and \{Dos Reis\}, \{A. C.\} and Rubin, \{H. A.\} and Sanders, \{D. A.\} and Santha, \{A. K.S.\} and Santoro, \{A. F.S.\} and Schwartz, \{A. J.\} and M. Sheaff and Sidwell, \{R. A.\} and Slaughter, \{A. J.\} and Sokoloff, \{M. D.\} and J. Solano and Stanton, \{N. R.\} and K. Stenson and Summers, \{D. J.\} and S. Takach and K. Thorne and Tripathi, \{A. K.\} and S. Watanabe and R. Weiss-Babai and J. Wiener and N. Witchey and E. Wolin and D. Yi and S. Yoshida and R. Zaliznyak and C. Zhang",

year = "1998",

month = mar,

day = "5",

doi = "10.1016/S0370-2693(97)01570-0",

language = "English",

volume = "421",

pages = "405--411",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1-4",

}

Aitala, EM, Amato, S, Anjos, JC, Appel, JA, Ashery, D, Banerjee, S, Bediaga, I, Blaylock, G, Bracker, SB, Burchat, PR, Burnstein, RA, Carter, T, Carvalho, HS, Copty, NJ, Cremaldi, LM, Darling, C, Denisenko, K, Fernandez, A, Fox, G, Gagnon, P, Gobel, C, Gounder, K, Halling, AM, Herrera, G, Hurvits, G, James, C, Kasper, PA, Kwan, S, Langs, DC, Leslie, J, Lundberg, B, Maytal-Beck, S, Meadows, B, De Mello Neto, JRT, Milburn, RH, De Miranda, JM, Napier, A, Nguyen, A, D'Oliveira, AB, O'Shaughnessy, K, Peng, KC, Perera, LP, Purohit, MV, Quinn, B, Radeztsky, S, Rafatian, A, Reay, NW, Reidy, JJ, Dos Reis, AC, Rubin, HA, Sanders, DA, Santha, AKS, Santoro, AFS, Schwartz, AJ, Sheaff, M, Sidwell, RA, Slaughter, AJ, Sokoloff, MD, Solano, J, Stanton, NR, Stenson, K, Summers, DJ, Takach, S, Thorne, K, Tripathi, AK, Watanabe, S, Weiss-Babai, R, Wiener, J, Witchey, N, Wolin, E, Yi, D, Yoshida, S, Zaliznyak, R & Zhang, C 1998, 'Branching fractions for D⁰ → K⁺K^- and D⁰ → π⁺π^-, and a search for CP violation in D⁰ decays', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 421, no. 1-4, pp. 405-411. https://doi.org/10.1016/S0370-2693(97)01570-0

TY - JOUR

T1 - Branching fractions for D0 → K+K- and D0 → π+π-, and a search for CP violation in D0 decays

AU - Aitala, E. M.

AU - Amato, S.

AU - Anjos, J. C.

AU - Appel, J. A.

AU - Ashery, D.

AU - Banerjee, S.

AU - Bediaga, I.

AU - Blaylock, G.

AU - Bracker, S. B.

AU - Burchat, P. R.

AU - Burnstein, R. A.

AU - Carter, T.

AU - Carvalho, H. S.

AU - Copty, N. J.

AU - Cremaldi, L. M.

AU - Darling, C.

AU - Denisenko, K.

AU - Fernandez, A.

AU - Fox, G.

AU - Gagnon, P.

AU - Gobel, C.

AU - Gounder, K.

AU - Halling, A. M.

AU - Herrera, G.

AU - Hurvits, G.

AU - James, C.

AU - Kasper, P. A.

AU - Kwan, S.

AU - Langs, D. C.

AU - Leslie, J.

AU - Lundberg, B.

AU - Maytal-Beck, S.

AU - Meadows, B.

AU - De Mello Neto, J. R.T.

AU - Milburn, R. H.

AU - De Miranda, J. M.

AU - Napier, A.

AU - Nguyen, A.

AU - D'Oliveira, A. B.

AU - O'Shaughnessy, K.

AU - Peng, K. C.

AU - Perera, L. P.

AU - Purohit, M. V.

AU - Quinn, B.

AU - Radeztsky, S.

AU - Rafatian, A.

AU - Reay, N. W.

AU - Reidy, J. J.

AU - Dos Reis, A. C.

AU - Rubin, H. A.

AU - Sanders, D. A.

AU - Santha, A. K.S.

AU - Santoro, A. F.S.

AU - Schwartz, A. J.

AU - Sheaff, M.

AU - Sidwell, R. A.

AU - Slaughter, A. J.

AU - Sokoloff, M. D.

AU - Solano, J.

AU - Stanton, N. R.

AU - Stenson, K.

AU - Summers, D. J.

AU - Takach, S.

AU - Thorne, K.

AU - Tripathi, A. K.

AU - Watanabe, S.

AU - Weiss-Babai, R.

AU - Wiener, J.

AU - Witchey, N.

AU - Wolin, E.

AU - Yi, D.

AU - Yoshida, S.

AU - Zaliznyak, R.

AU - Zhang, C.

PY - 1998/3/5

Y1 - 1998/3/5

N2 - Using the large hadroproduced charm sample collected in experiment E791 at Fermilab, we have measured ratios of branching fractions for the two-body singly-Cabibbo-suppressed charged decays of the D0: Γ(D0 → K+K-)/Γ(D0 → K-π+) = 0.109 ± 0.003 ± 0.003, Γ(D0 → π+π-)/Γ(D0 → K-π+) = 0.040 ± 0.002 ± 0.003, and Γ(D0 → K+K-)/Γ(D0 → π+π-) = 2.75 ± 0.15 ± 0.16. We have looked for differences in the decay rates of D0 and D̄0 to the CP eigenstates K+K- and π+π-, and have measured the CP asymmetry parameters ACP(K+K-) = -0.010 ± 0.049 ± 0.012 and ACP(π+π-) = -0.049 ± 0.078 ± 0.030, both consistent with zero.

AB - Using the large hadroproduced charm sample collected in experiment E791 at Fermilab, we have measured ratios of branching fractions for the two-body singly-Cabibbo-suppressed charged decays of the D0: Γ(D0 → K+K-)/Γ(D0 → K-π+) = 0.109 ± 0.003 ± 0.003, Γ(D0 → π+π-)/Γ(D0 → K-π+) = 0.040 ± 0.002 ± 0.003, and Γ(D0 → K+K-)/Γ(D0 → π+π-) = 2.75 ± 0.15 ± 0.16. We have looked for differences in the decay rates of D0 and D̄0 to the CP eigenstates K+K- and π+π-, and have measured the CP asymmetry parameters ACP(K+K-) = -0.010 ± 0.049 ± 0.012 and ACP(π+π-) = -0.049 ± 0.078 ± 0.030, both consistent with zero.

UR - https://www.scopus.com/pages/publications/0348098879

U2 - 10.1016/S0370-2693(97)01570-0

DO - 10.1016/S0370-2693(97)01570-0

M3 - Article

AN - SCOPUS:0348098879

SN - 0370-2693

VL - 421

SP - 405

EP - 411

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-4

ER -

Branching fractions for D⁰ → K⁺K^- and D⁰ → π⁺π^-, and a search for CP violation in D⁰ decays

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