Search for CP violation in τ → ππ0ντ decay

P. Avery; C. Prescott; A. I. Rubiera; H. Stoeck; J. Yelton; G. Brandenburg; A. Ershov; D. Y J Kim; R. Wilson; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; R. M. Hans; E. Johnson; I. Karliner; M. A. Marsh; C. Plager; C. Sedlack; M. Selen; J. J. Thaler; J. Williams; K. W. Edwards; A. J. Sadoff; R. Ammar; A. Bean; D. Besson; X. Zhao; S. Anderson; V. V. Frolov; Y. Kubota; S. J. Lee; J. J. O'Neill; R. Poling; A. Smith; C. J. Stepaniak; J. Urheim; S. Ahmed; M. S. Alam; S. B. Athar; L. Jian; L. Ling; M. Saleem; S. Timm; F. Wappler; A. Anastassov; E. Eckhart; K. K. Gan; C. Gwon; T. Hart; K. Honscheid; D. Hufnagel; H. Kagan; R. Kass; T. K. Pedlar; J. B. Thayer; E. Von Toerne; M. M. Zoeller; S. J. Richichi; H. Severini; P. Skubic; A. Undrus; V. Savinov; S. Chen; J. Fast; J. W. Hinson; J. Lee; D. H. Miller; E. I. Shibata; I. P J Shipsey; V. Pavlunin; D. Cronin-Hennessy; A. L. Lyon; E. H. Thorndike; T. E. Coan; V. Fadeyev; Y. S. Gao; Y. Maravin; I. Narsky; R. Stroynowski; J. Ye; T. Wlodek; M. Artuso; C. Boulahouache; K. Bukin; E. Dambasuren; G. Majumder; R. Mountain; S. Schuh; T. Skwarnicki; S. Stone; J. C. Wang; A. Wolf; J. Wu; S. Kopp; M. Kostin; A. H. Mahmood; S. E. Csorna; I. Danko; K. W. McLean; Z. Xu; R. Godang; G. Bonvicini; D. Cinabro; M. Dubrovin; S. McGee; G. J. Zhou; 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; A. Eppich; T. S. Hill; R. J. Morrison; R. A. Briere; G. P. Chen; T. Ferguson; H. Vogel; A. Gritsan; J. P. Alexander; R. Baker; C. Bebek; B. E. Berger; K. Berkelman; F. Blanc; V. Boisvert; D. G. Cassel; P. S. Drell; J. E. Duboscq; K. M. Ecklund; R. Ehrlich; P. Gaidarev; R. S. Galik; L. Gibbons; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; P. I. Hopman; L. Hsu; C. D. Jones; J. Kandaswamy; D. L. Kreinick; M. Lohner; A. Magerkurth; T. O. Meyer; N. B. Mistry; E. Nordberg; M. Palmer; J. R. Patterson; D. Peterson; D. Riley; A. Romano; H. Schwarthoff; J. G. Thayer; D. Urner; B. Valant-Spaight; G. Viehhauser; A. Warburton

doi:10.1103/PhysRevD.64.092005

Search for CP violation in τ → ππ⁰ν_τ decay

P. Avery, C. Prescott, A. I. Rubiera, H. Stoeck, J. Yelton, G. Brandenburg, A. Ershov, D. Y J Kim, R. Wilson, T. Bergfeld, B. I. Eisenstein, J. Ernst, G. E. Gladding, G. D. Gollin, R. M. Hans, E. Johnson, I. Karliner, M. A. Marsh, C. Plager, C. SedlackM. Selen, J. J. Thaler, J. Williams, K. W. Edwards, A. J. Sadoff, R. Ammar, A. Bean, D. Besson, X. Zhao, S. Anderson, V. V. Frolov, Y. Kubota, S. J. Lee, J. J. O'Neill, R. Poling, A. Smith, C. J. Stepaniak, J. Urheim, S. Ahmed, M. S. Alam, S. B. Athar, L. Jian, L. Ling, M. Saleem, S. Timm, F. Wappler, A. Anastassov, E. Eckhart, K. K. Gan, C. Gwon, T. Hart, K. Honscheid, D. Hufnagel, H. Kagan, R. Kass, T. K. Pedlar, J. B. Thayer, E. Von Toerne, M. M. Zoeller, S. J. Richichi, H. Severini, P. Skubic, A. Undrus, V. Savinov, S. Chen, J. Fast, J. W. Hinson, J. Lee, D. H. Miller, E. I. Shibata, I. P J Shipsey, V. Pavlunin, D. Cronin-Hennessy, A. L. Lyon, E. H. Thorndike, T. E. Coan, V. Fadeyev, Y. S. Gao, Y. Maravin, I. Narsky, R. Stroynowski, J. Ye, T. Wlodek, M. Artuso, C. Boulahouache, K. Bukin, E. Dambasuren, G. Majumder, R. Mountain, S. Schuh, T. Skwarnicki, S. Stone, J. C. Wang, A. Wolf, J. Wu, S. Kopp, M. Kostin, A. H. Mahmood, S. E. Csorna, I. Danko, K. W. McLean, Z. Xu, R. Godang, G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, G. J. Zhou, 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, A. Eppich, T. S. Hill, R. J. Morrison, R. A. Briere, G. P. Chen, T. Ferguson, H. Vogel, A. Gritsan, J. P. Alexander, R. Baker, C. Bebek, B. E. Berger, K. Berkelman, F. Blanc, V. Boisvert, D. G. Cassel, P. S. Drell, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, P. Gaidarev, R. S. Galik, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, P. I. Hopman, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, M. Lohner, A. Magerkurth, T. O. Meyer, N. B. Mistry, E. Nordberg, M. Palmer, J. R. Patterson, D. Peterson, D. Riley, A. Romano, H. Schwarthoff, J. G. Thayer, D. Urner, B. Valant-Spaight, G. Viehhauser, A. Warburton

Physics and Astronomy (Twin Cities)

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Abstract

We search for CP nonconservation in the decays of τ leptons produced via e⁺e^- annihilation at √s ∼ 10.6 GeV. The method uses correlated decays of pairs of τ leptons, each decaying to the ππ⁰ν_τ final state. The search is done within the framework of a model with a scalar boson exchange. In an analysis of a data sample corresponding to 12.2×10⁶ produced τ pairs collected with the CLEO detector, we find no evidence of violation of CP symmetry. We obtain a limit on the imaginary part of the coupling constant parametrizing the relative contribution of diagrams that would lead to CP violation to be -0.046<Im(Λ)<0.022 at 90% C.L. This result provides a restriction on CP nonconservation in tau lepton decays. As a cross-check, we study the decay angular distribution and perform a model-independent search for a CP violation effect of a scalar exchange in single τ→ππ⁰ν_τ decays. The limit on the imaginary part of the τ scalar coupling is -0.033 <Im(Λ)<0.089 at 90% CL.

Original language	English (US)
Article number	092005
Journal	Physical Review D
Volume	64
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.64.092005
State	Published - Nov 1 2001

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Avery, P., Prescott, C., Rubiera, A. I., Stoeck, H., Yelton, J., Brandenburg, G., Ershov, A., Kim, D. Y. J., Wilson, R., Bergfeld, T., Eisenstein, B. I., Ernst, J., Gladding, G. E., Gollin, G. D., Hans, R. M., Johnson, E., Karliner, I., Marsh, M. A., Plager, C., ... Warburton, A. (2001). Search for CP violation in τ → ππ⁰ν_τ decay. Physical Review D, 64(9), Article 092005. https://doi.org/10.1103/PhysRevD.64.092005

Avery, P, Prescott, C, Rubiera, AI, Stoeck, H, Yelton, J, Brandenburg, G, Ershov, A, Kim, DYJ, Wilson, R, Bergfeld, T, Eisenstein, BI, Ernst, J, Gladding, GE, Gollin, GD, Hans, RM, Johnson, E, Karliner, I, Marsh, MA, Plager, C, Sedlack, C, Selen, M, Thaler, JJ, Williams, J, Edwards, KW, Sadoff, AJ, Ammar, R, Bean, A, Besson, D, Zhao, X, Anderson, S, Frolov, VV, Kubota, Y, Lee, SJ, O'Neill, JJ, Poling, R, Smith, A, Stepaniak, CJ, Urheim, J, Ahmed, S, Alam, MS, Athar, SB, Jian, L, Ling, L, Saleem, M, Timm, S, Wappler, F, Anastassov, A, Eckhart, E, Gan, KK, Gwon, C, Hart, T, Honscheid, K, Hufnagel, D, Kagan, H, Kass, R, Pedlar, TK, Thayer, JB, Von Toerne, E, Zoeller, MM, Richichi, SJ, Severini, H, Skubic, P, Undrus, A, Savinov, V, Chen, S, Fast, J, Hinson, JW, Lee, J, Miller, DH, Shibata, EI, Shipsey, IPJ, Pavlunin, V, Cronin-Hennessy, D, Lyon, AL, Thorndike, EH, Coan, TE, Fadeyev, V, Gao, YS, Maravin, Y, Narsky, I, Stroynowski, R, Ye, J, Wlodek, T, Artuso, M, Boulahouache, C, Bukin, K, Dambasuren, E, Majumder, G, Mountain, R, Schuh, S, Skwarnicki, T, Stone, S, Wang, JC, Wolf, A, Wu, J, Kopp, S, Kostin, M, Mahmood, AH, Csorna, SE, Danko, I, McLean, KW, Xu, Z, Godang, R, Bonvicini, G, Cinabro, D, Dubrovin, M, McGee, S, Zhou, GJ, Bornheim, A, Lipeles, E, Pappas, SP, Shapiro, A, Sun, WM, Weinstein, AJ, Jaffe, DE, Mahapatra, R, Masek, G, Paar, HP, Asner, DM, Eppich, A, Hill, TS, Morrison, RJ, Briere, RA, Chen, GP, Ferguson, T, Vogel, H, Gritsan, A, Alexander, JP, Baker, R, Bebek, C, Berger, BE, Berkelman, K, Blanc, F, Boisvert, V, Cassel, DG, Drell, PS, Duboscq, JE, Ecklund, KM, Ehrlich, R, Gaidarev, P, Galik, RS, Gibbons, L, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Hopman, PI, Hsu, L, Jones, CD, Kandaswamy, J, Kreinick, DL, Lohner, M, Magerkurth, A, Meyer, TO, Mistry, NB, Nordberg, E, Palmer, M, Patterson, JR, Peterson, D, Riley, D, Romano, A, Schwarthoff, H, Thayer, JG, Urner, D, Valant-Spaight, B, Viehhauser, G & Warburton, A 2001, 'Search for CP violation in τ → ππ⁰ν_τ decay', Physical Review D, vol. 64, no. 9, 092005. https://doi.org/10.1103/PhysRevD.64.092005

@article{24deaeeb64904c55af59909dccfa56fd,

title = "Search for CP violation in τ → ππ0ντ decay",

abstract = "We search for CP nonconservation in the decays of τ leptons produced via e+e- annihilation at √s ∼ 10.6 GeV. The method uses correlated decays of pairs of τ leptons, each decaying to the ππ0ντ final state. The search is done within the framework of a model with a scalar boson exchange. In an analysis of a data sample corresponding to 12.2×106 produced τ pairs collected with the CLEO detector, we find no evidence of violation of CP symmetry. We obtain a limit on the imaginary part of the coupling constant parametrizing the relative contribution of diagrams that would lead to CP violation to be -0.046<Im(Λ)<0.022 at 90% C.L. This result provides a restriction on CP nonconservation in tau lepton decays. As a cross-check, we study the decay angular distribution and perform a model-independent search for a CP violation effect of a scalar exchange in single τ→ππ0ντ decays. The limit on the imaginary part of the τ scalar coupling is -0.033 <Im(Λ)<0.089 at 90% CL.",

author = "P. Avery and C. Prescott and Rubiera, {A. I.} and H. Stoeck and J. Yelton and G. Brandenburg and A. Ershov and Kim, {D. Y J} and R. Wilson and T. Bergfeld and Eisenstein, {B. I.} and J. Ernst and Gladding, {G. E.} and Gollin, {G. D.} and Hans, {R. M.} and E. Johnson and I. Karliner and Marsh, {M. A.} and C. Plager and C. Sedlack and M. Selen and Thaler, {J. J.} and J. Williams and Edwards, {K. W.} and Sadoff, {A. J.} and R. Ammar and A. Bean and D. Besson and X. Zhao and S. Anderson and Frolov, {V. V.} and Y. Kubota and Lee, {S. J.} and O'Neill, {J. J.} and R. Poling and A. Smith and Stepaniak, {C. J.} and J. Urheim and S. Ahmed and Alam, {M. S.} and Athar, {S. B.} and L. Jian and L. Ling and M. Saleem and S. Timm and F. Wappler and A. Anastassov and E. Eckhart and Gan, {K. K.} and C. Gwon and T. Hart and K. Honscheid and D. Hufnagel and H. Kagan and R. Kass and Pedlar, {T. K.} and Thayer, {J. B.} and {Von Toerne}, E. and Zoeller, {M. M.} and Richichi, {S. J.} and H. Severini and P. Skubic and A. Undrus and V. Savinov and S. Chen and J. Fast and Hinson, {J. W.} and J. Lee and Miller, {D. H.} and Shibata, {E. I.} and Shipsey, {I. P J} and V. Pavlunin and D. Cronin-Hennessy and Lyon, {A. L.} and Thorndike, {E. H.} and Coan, {T. E.} and V. Fadeyev and Gao, {Y. S.} and Y. Maravin and I. Narsky and R. Stroynowski and J. Ye and T. Wlodek and M. Artuso and C. Boulahouache and K. Bukin and E. Dambasuren and G. Majumder and R. Mountain and S. Schuh and T. Skwarnicki and S. Stone and Wang, {J. C.} and A. Wolf and J. Wu and S. Kopp and M. Kostin and Mahmood, {A. H.} and 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 Zhou, {G. J.} 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 A. Eppich and Hill, {T. S.} and Morrison, {R. J.} and Briere, {R. A.} and Chen, {G. P.} and T. Ferguson and H. Vogel and A. Gritsan and Alexander, {J. P.} and R. Baker and C. Bebek and Berger, {B. E.} 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 P. Gaidarev and Galik, {R. S.} and L. Gibbons and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and Hopman, {P. I.} and L. Hsu and Jones, {C. D.} and J. Kandaswamy and Kreinick, {D. L.} and M. Lohner and A. Magerkurth and Meyer, {T. O.} and Mistry, {N. B.} and E. Nordberg and M. Palmer and Patterson, {J. R.} and D. Peterson and D. Riley and A. Romano and H. Schwarthoff and Thayer, {J. G.} and D. Urner and B. Valant-Spaight and G. Viehhauser and A. Warburton",

year = "2001",

month = nov,

day = "1",

doi = "10.1103/PhysRevD.64.092005",

language = "English (US)",

volume = "64",

journal = "Physical Review D",

issn = "0556-2821",

publisher = "American Institute of Physics Publising LLC",

number = "9",

}

TY - JOUR

T1 - Search for CP violation in τ → ππ0ντ decay

AU - Avery, P.

AU - Prescott, C.

AU - Rubiera, A. I.

AU - Stoeck, H.

AU - Yelton, J.

AU - Brandenburg, G.

AU - Ershov, A.

AU - Kim, D. Y J

AU - Wilson, R.

AU - Bergfeld, T.

AU - Eisenstein, B. I.

AU - Ernst, J.

AU - Gladding, G. E.

AU - Gollin, G. D.

AU - Hans, R. M.

AU - Johnson, E.

AU - Karliner, I.

AU - Marsh, M. A.

AU - Plager, C.

AU - Sedlack, C.

AU - Selen, M.

AU - Thaler, J. J.

AU - Williams, J.

AU - Edwards, K. W.

AU - Sadoff, A. J.

AU - Ammar, R.

AU - Bean, A.

AU - Besson, D.

AU - Zhao, X.

AU - Anderson, S.

AU - Frolov, V. V.

AU - Kubota, Y.

AU - Lee, S. J.

AU - O'Neill, J. J.

AU - Poling, R.

AU - Smith, A.

AU - Stepaniak, C. J.

AU - Urheim, J.

AU - Ahmed, S.

AU - Alam, M. S.

AU - Athar, S. B.

AU - Jian, L.

AU - Ling, L.

AU - Saleem, M.

AU - Timm, S.

AU - Wappler, F.

AU - Anastassov, A.

AU - Eckhart, E.

AU - Gan, K. K.

AU - Gwon, C.

AU - Hart, T.

AU - Honscheid, K.

AU - Hufnagel, D.

AU - Kagan, H.

AU - Kass, R.

AU - Pedlar, T. K.

AU - Thayer, J. B.

AU - Von Toerne, E.

AU - Zoeller, M. M.

AU - Richichi, S. J.

AU - Severini, H.

AU - Skubic, P.

AU - Undrus, A.

AU - Savinov, V.

AU - Chen, S.

AU - Fast, J.

AU - Hinson, J. W.

AU - Lee, J.

AU - Miller, D. H.

AU - Shibata, E. I.

AU - Shipsey, I. P J

AU - Pavlunin, V.

AU - Cronin-Hennessy, D.

AU - Lyon, A. L.

AU - Thorndike, E. H.

AU - Coan, T. E.

AU - Fadeyev, V.

AU - Gao, Y. S.

AU - Maravin, Y.

AU - Narsky, I.

AU - Stroynowski, R.

AU - Ye, J.

AU - Wlodek, T.

AU - Artuso, M.

AU - Boulahouache, C.

AU - Bukin, K.

AU - Dambasuren, E.

AU - Majumder, G.

AU - Mountain, R.

AU - Schuh, S.

AU - Skwarnicki, T.

AU - Stone, S.

AU - Wang, J. C.

AU - Wolf, A.

AU - Wu, J.

AU - Kopp, S.

AU - Kostin, M.

AU - Mahmood, A. H.

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 - Zhou, G. J.

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 - Eppich, A.

AU - Hill, T. S.

AU - Morrison, R. J.

AU - Briere, R. A.

AU - Chen, G. P.

AU - Ferguson, T.

AU - Vogel, H.

AU - Gritsan, A.

AU - Alexander, J. P.

AU - Baker, R.

AU - Bebek, C.

AU - Berger, B. E.

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 - Gaidarev, P.

AU - Galik, R. S.

AU - Gibbons, L.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hopman, P. I.

AU - Hsu, L.

AU - Jones, C. D.

AU - Kandaswamy, J.

AU - Kreinick, D. L.

AU - Lohner, M.

AU - Magerkurth, A.

AU - Meyer, T. O.

AU - Mistry, N. B.

AU - Nordberg, E.

AU - Palmer, M.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Riley, D.

AU - Romano, A.

AU - Schwarthoff, H.

AU - Thayer, J. G.

AU - Urner, D.

AU - Valant-Spaight, B.

AU - Viehhauser, G.

AU - Warburton, A.

PY - 2001/11/1

Y1 - 2001/11/1

N2 - We search for CP nonconservation in the decays of τ leptons produced via e+e- annihilation at √s ∼ 10.6 GeV. The method uses correlated decays of pairs of τ leptons, each decaying to the ππ0ντ final state. The search is done within the framework of a model with a scalar boson exchange. In an analysis of a data sample corresponding to 12.2×106 produced τ pairs collected with the CLEO detector, we find no evidence of violation of CP symmetry. We obtain a limit on the imaginary part of the coupling constant parametrizing the relative contribution of diagrams that would lead to CP violation to be -0.046<Im(Λ)<0.022 at 90% C.L. This result provides a restriction on CP nonconservation in tau lepton decays. As a cross-check, we study the decay angular distribution and perform a model-independent search for a CP violation effect of a scalar exchange in single τ→ππ0ντ decays. The limit on the imaginary part of the τ scalar coupling is -0.033 <Im(Λ)<0.089 at 90% CL.

AB - We search for CP nonconservation in the decays of τ leptons produced via e+e- annihilation at √s ∼ 10.6 GeV. The method uses correlated decays of pairs of τ leptons, each decaying to the ππ0ντ final state. The search is done within the framework of a model with a scalar boson exchange. In an analysis of a data sample corresponding to 12.2×106 produced τ pairs collected with the CLEO detector, we find no evidence of violation of CP symmetry. We obtain a limit on the imaginary part of the coupling constant parametrizing the relative contribution of diagrams that would lead to CP violation to be -0.046<Im(Λ)<0.022 at 90% C.L. This result provides a restriction on CP nonconservation in tau lepton decays. As a cross-check, we study the decay angular distribution and perform a model-independent search for a CP violation effect of a scalar exchange in single τ→ππ0ντ decays. The limit on the imaginary part of the τ scalar coupling is -0.033 <Im(Λ)<0.089 at 90% CL.

UR - http://www.scopus.com/inward/record.url?scp=18544400447&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=18544400447&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.64.092005

DO - 10.1103/PhysRevD.64.092005

M3 - Article

AN - SCOPUS:18544400447

SN - 0556-2821

VL - 64

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - 092005

ER -

Search for CP violation in τ → ππ⁰ν_τ decay

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