Search for D0−D0 mixing and doubly-Cabibbo-suppressed decays of the D0 in hadronic final states

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. K. Copty; L. M. Cremaldi; C. Darling; A. Fernandez; 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; A. K.S. Santha; A. F.S. Santoro; A. J. Schwartz; M. Sheaff; R. A. Sidwell; A. J. Slaughter; M. D. Sokoloff; 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:10.1103/PhysRevD.57.13

Search for D0−D0 mixing and doubly-Cabibbo-suppressed decays of the D0 in hadronic final states

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. K. Copty, L. M. Cremaldi, C. Darling, A. Fernandez, P. Gagnon, C. Gobel, K. GounderA. 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, A. K.S. Santha, A. F.S. Santoro, A. J. Schwartz, M. Sheaff, R. A. Sidwell, A. J. Slaughter, M. D. Sokoloff, 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

We present results of a search for (Formula presented) mixing and doubly-Cabibbo-suppressed decays of the (Formula presented) in Fermilab experiment E791, a fixed-target charm hadroproduction experiment. We look for evidence of mixing in the decay chain (Formula presented) or (Formula presented). If the charge of the pion from the (Formula presented) decay is the same as the charge of the kaon from the (Formula presented) decay (a “wrong-sign” event), mixing may have occurred. Mixing can be distinguished from other sources of wrong-sign events (such as doubly-Cabibbo-suppressed decays) by analyzing the distribution of decay times. We see no evidence of mixing. Allowing for (Formula presented) violation in the interference between DCS and mixing amplitudes our fitted ratio for mixed to unmixed decay rates is (Formula presented). This corresponds to a 90% C.L. upper limit of (Formula presented). The sensitivity of this result is comparable to that of previous measurements, but the assumptions made in fitting the data are notably more general. We present results from many fits to our data under various assumptions. If we assume (Formula presented), we find a two-sigma wrong-sign enhancement in the (Formula presented) mode which we ascribe to doubly Cabibbo-suppressed decays. The ratios of doubly Cabibbo-suppressed decays to Cabibbo-favored decays are (Formula presented) and (Formula presented).

Original language	English
Pages (from-to)	13-27
Number of pages	15
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	57
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.57.13
State	Published - Jan 1998
Externally published	Yes

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10.1103/PhysRevD.57.13

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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. K., Cremaldi, L. M., Darling, C., Fernandez, A., Gagnon, P., Gobel, C., ... Zhang, C. (1998). Search for D0−D0 mixing and doubly-Cabibbo-suppressed decays of the D0 in hadronic final states. Physical Review D - Particles, Fields, Gravitation and Cosmology, 57(1), 13-27. https://doi.org/10.1103/PhysRevD.57.13

@article{f2d5228944e84a4aac07a28b4b2c711b,

title = "Search for D0−D0 mixing and doubly-Cabibbo-suppressed decays of the D0 in hadronic final states",

abstract = "We present results of a search for (Formula presented) mixing and doubly-Cabibbo-suppressed decays of the (Formula presented) in Fermilab experiment E791, a fixed-target charm hadroproduction experiment. We look for evidence of mixing in the decay chain (Formula presented) or (Formula presented). If the charge of the pion from the (Formula presented) decay is the same as the charge of the kaon from the (Formula presented) decay (a “wrong-sign” event), mixing may have occurred. Mixing can be distinguished from other sources of wrong-sign events (such as doubly-Cabibbo-suppressed decays) by analyzing the distribution of decay times. We see no evidence of mixing. Allowing for (Formula presented) violation in the interference between DCS and mixing amplitudes our fitted ratio for mixed to unmixed decay rates is (Formula presented). This corresponds to a 90% C.L. upper limit of (Formula presented). The sensitivity of this result is comparable to that of previous measurements, but the assumptions made in fitting the data are notably more general. We present results from many fits to our data under various assumptions. If we assume (Formula presented), we find a two-sigma wrong-sign enhancement in the (Formula presented) mode which we ascribe to doubly Cabibbo-suppressed decays. The ratios of doubly Cabibbo-suppressed decays to Cabibbo-favored decays are (Formula presented) and (Formula presented).",

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. K.} and Cremaldi, {L. M.} and C. Darling and A. Fernandez 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{\textquoteright}Oliveira, {A. B.} and K. O{\textquoteright}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 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 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 = jan,

doi = "10.1103/PhysRevD.57.13",

language = "אנגלית",

volume = "57",

pages = "13--27",

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

issn = "1550-7998",

publisher = "American Physical Society",

number = "1",

}

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, NK, Cremaldi, LM, Darling, C, Fernandez, A, 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, Santha, AKS, Santoro, AFS, Schwartz, AJ, Sheaff, M, Sidwell, RA, Slaughter, AJ, Sokoloff, MD, 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, 'Search for D0−D0 mixing and doubly-Cabibbo-suppressed decays of the D0 in hadronic final states', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 57, no. 1, pp. 13-27. https://doi.org/10.1103/PhysRevD.57.13

TY - JOUR

T1 - Search for D0−D0 mixing and doubly-Cabibbo-suppressed decays of the D0 in hadronic final states

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. K.

AU - Cremaldi, L. M.

AU - Darling, C.

AU - Fernandez, A.

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 - 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 - 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 - 1998/1

Y1 - 1998/1

N2 - We present results of a search for (Formula presented) mixing and doubly-Cabibbo-suppressed decays of the (Formula presented) in Fermilab experiment E791, a fixed-target charm hadroproduction experiment. We look for evidence of mixing in the decay chain (Formula presented) or (Formula presented). If the charge of the pion from the (Formula presented) decay is the same as the charge of the kaon from the (Formula presented) decay (a “wrong-sign” event), mixing may have occurred. Mixing can be distinguished from other sources of wrong-sign events (such as doubly-Cabibbo-suppressed decays) by analyzing the distribution of decay times. We see no evidence of mixing. Allowing for (Formula presented) violation in the interference between DCS and mixing amplitudes our fitted ratio for mixed to unmixed decay rates is (Formula presented). This corresponds to a 90% C.L. upper limit of (Formula presented). The sensitivity of this result is comparable to that of previous measurements, but the assumptions made in fitting the data are notably more general. We present results from many fits to our data under various assumptions. If we assume (Formula presented), we find a two-sigma wrong-sign enhancement in the (Formula presented) mode which we ascribe to doubly Cabibbo-suppressed decays. The ratios of doubly Cabibbo-suppressed decays to Cabibbo-favored decays are (Formula presented) and (Formula presented).

AB - We present results of a search for (Formula presented) mixing and doubly-Cabibbo-suppressed decays of the (Formula presented) in Fermilab experiment E791, a fixed-target charm hadroproduction experiment. We look for evidence of mixing in the decay chain (Formula presented) or (Formula presented). If the charge of the pion from the (Formula presented) decay is the same as the charge of the kaon from the (Formula presented) decay (a “wrong-sign” event), mixing may have occurred. Mixing can be distinguished from other sources of wrong-sign events (such as doubly-Cabibbo-suppressed decays) by analyzing the distribution of decay times. We see no evidence of mixing. Allowing for (Formula presented) violation in the interference between DCS and mixing amplitudes our fitted ratio for mixed to unmixed decay rates is (Formula presented). This corresponds to a 90% C.L. upper limit of (Formula presented). The sensitivity of this result is comparable to that of previous measurements, but the assumptions made in fitting the data are notably more general. We present results from many fits to our data under various assumptions. If we assume (Formula presented), we find a two-sigma wrong-sign enhancement in the (Formula presented) mode which we ascribe to doubly Cabibbo-suppressed decays. The ratios of doubly Cabibbo-suppressed decays to Cabibbo-favored decays are (Formula presented) and (Formula presented).

UR - http://www.scopus.com/inward/record.url?scp=0001917283&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.57.13

DO - 10.1103/PhysRevD.57.13

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:0001917283

SN - 1550-7998

VL - 57

SP - 13

EP - 27

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

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

IS - 1

ER -

Search for D0−D0 mixing and doubly-Cabibbo-suppressed decays of the D0 in hadronic final states

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