The Michel parameter for the decay τ→eνν

H. Janssen; D. Antreasyan; H. W. Bartels; D. Besset; Ch Bieler; J. K. Bienlein; A. Bizzeti; E. D. Bloom; I. Brock; K. Brockmüller; R. Cabenda; A. Cartacci; M. Cavalli-Sforza; R. Clare; A. Compagnucci; G. Conforto; S. Cooper; R. Cowan; D. Coyne; A. Engler; K. Fairfield; G. Folger; A. Fridman; J. Gaiser; D. Gelphman; G. Glaser; G. Godfrey; K. Graaf; F. H. Heimlich; F. H. Heinsius; R. Hofstadter; J. Irion; Z. Jakubowski; K. Karch; S. Keh; T. Kiel; H. Kilian; I. Kirkbride; T. Kloiber; M. Kobel; W. Koch; A. C. König; K. Königsmann; R. W. Krämer; S. Krüger; G. Landi; R. Lee; S. Leffler; R. Lekebusch; A. M. Litke; W. Lockman; S. Lowe; B. Lurz; D. Marlow; H. Marsiske; W. Maschmann; P. McBride; H. Meyer; B. Muryn; F. Messing; W. J. Metzger; B. Monteleoni; R. Nernst; B. Niczyporuk; G. Nowak; C. Peck; P. G. Pelfer; B. Pollock; F. C. Porter; D. Prindle; P. Ratoff; M. Reidenbach; B. Renger; C. Rippich; M. Scheer; P. Schmitt; J. Schotanus; J. Schütte; A. Schwarz; D. Sievers; T. Skwarnicki; V. Stock; K. Strauch; U. Strohbusch; J. Tompkins; H. J. Trost; B. Van Uitert; R. T. Van De Walle; H. Vogel; A. Voigt; U. Volland; K. Wachs; K. Wacker; W. Walk; H. Wegener; D. A. Williams; P. Zschorsch

doi:10.1016/0370-2693(89)90670-9

The Michel parameter for the decay τ→eνν

H. Janssen, D. Antreasyan, H. W. Bartels, D. Besset, Ch Bieler, J. K. Bienlein, A. Bizzeti, E. D. Bloom, I. Brock, K. Brockmüller, R. Cabenda, A. Cartacci, M. Cavalli-Sforza, R. Clare, A. Compagnucci, G. Conforto, S. Cooper, R. Cowan, D. Coyne, A. EnglerK. Fairfield, G. Folger, A. Fridman, J. Gaiser, D. Gelphman, G. Glaser, G. Godfrey, K. Graaf, F. H. Heimlich, F. H. Heinsius, R. Hofstadter, J. Irion, Z. Jakubowski, K. Karch, S. Keh, T. Kiel, H. Kilian, I. Kirkbride, T. Kloiber, M. Kobel, W. Koch, A. C. König, K. Königsmann, R. W. Krämer, S. Krüger, G. Landi, R. Lee, S. Leffler, R. Lekebusch, A. M. Litke, W. Lockman, S. Lowe, B. Lurz, D. Marlow, H. Marsiske, W. Maschmann, P. McBride, H. Meyer, B. Muryn, F. Messing, W. J. Metzger, B. Monteleoni, R. Nernst, B. Niczyporuk, G. Nowak, C. Peck, P. G. Pelfer, B. Pollock, F. C. Porter, D. Prindle, P. Ratoff, M. Reidenbach, B. Renger, C. Rippich, M. Scheer, P. Schmitt, J. Schotanus, J. Schütte, A. Schwarz, D. Sievers, T. Skwarnicki, V. Stock, K. Strauch, U. Strohbusch, J. Tompkins, H. J. Trost, B. Van Uitert, R. T. Van De Walle, H. Vogel, A. Voigt, U. Volland, K. Wachs, K. Wacker, W. Walk, H. Wegener, D. A. Williams, P. Zschorsch

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Abstract

The Crystal Ball detector at the Doris II storage ring at DESY has been used to study the electron energy spectrum of the decay τ→evv̄. In the standard model the Lorentz structure of the decay matrix element is of the well known V-A type, resulting in a Michel parameter of p=0.75. Our spectrum is found to be consistent with this value. A fit yields the value of 0.64±0.07.

Original language	English (US)
Pages (from-to)	273-280
Number of pages	8
Journal	Physics Letters B
Volume	228
Issue number	2
DOIs	https://doi.org/10.1016/0370-2693(89)90670-9
State	Published - Sep 14 1989
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0370-2693(89)90670-9

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Janssen, H., Antreasyan, D., Bartels, H. W., Besset, D., Bieler, C., Bienlein, J. K., Bizzeti, A., Bloom, E. D., Brock, I., Brockmüller, K., Cabenda, R., Cartacci, A., Cavalli-Sforza, M., Clare, R., Compagnucci, A., Conforto, G., Cooper, S., Cowan, R., Coyne, D., ... Zschorsch, P. (1989). The Michel parameter for the decay τ→eνν. Physics Letters B, 228(2), 273-280. https://doi.org/10.1016/0370-2693(89)90670-9

Janssen, H, Antreasyan, D, Bartels, HW, Besset, D, Bieler, C, Bienlein, JK, Bizzeti, A, Bloom, ED, Brock, I, Brockmüller, K, Cabenda, R, Cartacci, A, Cavalli-Sforza, M, Clare, R, Compagnucci, A, Conforto, G, Cooper, S, Cowan, R, Coyne, D, Engler, A, Fairfield, K, Folger, G, Fridman, A, Gaiser, J, Gelphman, D, Glaser, G, Godfrey, G, Graaf, K, Heimlich, FH, Heinsius, FH, Hofstadter, R, Irion, J, Jakubowski, Z, Karch, K, Keh, S, Kiel, T, Kilian, H, Kirkbride, I, Kloiber, T, Kobel, M, Koch, W, König, AC, Königsmann, K, Krämer, RW, Krüger, S, Landi, G, Lee, R, Leffler, S, Lekebusch, R, Litke, AM, Lockman, W, Lowe, S, Lurz, B, Marlow, D, Marsiske, H, Maschmann, W, McBride, P, Meyer, H, Muryn, B, Messing, F, Metzger, WJ, Monteleoni, B, Nernst, R, Niczyporuk, B, Nowak, G, Peck, C, Pelfer, PG, Pollock, B, Porter, FC, Prindle, D, Ratoff, P, Reidenbach, M, Renger, B, Rippich, C, Scheer, M, Schmitt, P, Schotanus, J, Schütte, J, Schwarz, A, Sievers, D, Skwarnicki, T, Stock, V, Strauch, K, Strohbusch, U, Tompkins, J, Trost, HJ, Van Uitert, B, Van De Walle, RT, Vogel, H, Voigt, A, Volland, U, Wachs, K, Wacker, K, Walk, W, Wegener, H, Williams, DA & Zschorsch, P 1989, 'The Michel parameter for the decay τ→eνν', Physics Letters B, vol. 228, no. 2, pp. 273-280. https://doi.org/10.1016/0370-2693(89)90670-9

@article{057cb3a43f0e4aba824f06c3d8ec7445,

title = "The Michel parameter for the decay τ→eνν",

abstract = "The Crystal Ball detector at the Doris II storage ring at DESY has been used to study the electron energy spectrum of the decay τ→ev{\=v}. In the standard model the Lorentz structure of the decay matrix element is of the well known V-A type, resulting in a Michel parameter of p=0.75. Our spectrum is found to be consistent with this value. A fit yields the value of 0.64±0.07.",

author = "H. Janssen and D. Antreasyan and Bartels, {H. W.} and D. Besset and Ch Bieler and Bienlein, {J. K.} and A. Bizzeti and Bloom, {E. D.} and I. Brock and K. Brockm{\"u}ller and R. Cabenda and A. Cartacci and M. Cavalli-Sforza and R. Clare and A. Compagnucci and G. Conforto and S. Cooper and R. Cowan and D. Coyne and A. Engler and K. Fairfield and G. Folger and A. Fridman and J. Gaiser and D. Gelphman and G. Glaser and G. Godfrey and K. Graaf and Heimlich, {F. H.} and Heinsius, {F. H.} and R. Hofstadter and J. Irion and Z. Jakubowski and K. Karch and S. Keh and T. Kiel and H. Kilian and I. Kirkbride and T. Kloiber and M. Kobel and W. Koch and K{\"o}nig, {A. C.} and K. K{\"o}nigsmann and Kr{\"a}mer, {R. W.} and S. Kr{\"u}ger and G. Landi and R. Lee and S. Leffler and R. Lekebusch and Litke, {A. M.} and W. Lockman and S. Lowe and B. Lurz and D. Marlow and H. Marsiske and W. Maschmann and P. McBride and H. Meyer and B. Muryn and F. Messing and Metzger, {W. J.} and B. Monteleoni and R. Nernst and B. Niczyporuk and G. Nowak and C. Peck and Pelfer, {P. G.} and B. Pollock and Porter, {F. C.} and D. Prindle and P. Ratoff and M. Reidenbach and B. Renger and C. Rippich and M. Scheer and P. Schmitt and J. Schotanus and J. Sch{\"u}tte and A. Schwarz and D. Sievers and T. Skwarnicki and V. Stock and K. Strauch and U. Strohbusch and J. Tompkins and Trost, {H. J.} and {Van Uitert}, B. and {Van De Walle}, {R. T.} and H. Vogel and A. Voigt and U. Volland and K. Wachs and K. Wacker and W. Walk and H. Wegener and Williams, {D. A.} and P. Zschorsch",

year = "1989",

month = sep,

day = "14",

doi = "10.1016/0370-2693(89)90670-9",

language = "English (US)",

volume = "228",

pages = "273--280",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "2",

}

TY - JOUR

T1 - The Michel parameter for the decay τ→eνν

AU - Janssen, H.

AU - Antreasyan, D.

AU - Bartels, H. W.

AU - Besset, D.

AU - Bieler, Ch

AU - Bienlein, J. K.

AU - Bizzeti, A.

AU - Bloom, E. D.

AU - Brock, I.

AU - Brockmüller, K.

AU - Cabenda, R.

AU - Cartacci, A.

AU - Cavalli-Sforza, M.

AU - Clare, R.

AU - Compagnucci, A.

AU - Conforto, G.

AU - Cooper, S.

AU - Cowan, R.

AU - Coyne, D.

AU - Engler, A.

AU - Fairfield, K.

AU - Folger, G.

AU - Fridman, A.

AU - Gaiser, J.

AU - Gelphman, D.

AU - Glaser, G.

AU - Godfrey, G.

AU - Graaf, K.

AU - Heimlich, F. H.

AU - Heinsius, F. H.

AU - Hofstadter, R.

AU - Irion, J.

AU - Jakubowski, Z.

AU - Karch, K.

AU - Keh, S.

AU - Kiel, T.

AU - Kilian, H.

AU - Kirkbride, I.

AU - Kloiber, T.

AU - Kobel, M.

AU - Koch, W.

AU - König, A. C.

AU - Königsmann, K.

AU - Krämer, R. W.

AU - Krüger, S.

AU - Landi, G.

AU - Lee, R.

AU - Leffler, S.

AU - Lekebusch, R.

AU - Litke, A. M.

AU - Lockman, W.

AU - Lowe, S.

AU - Lurz, B.

AU - Marlow, D.

AU - Marsiske, H.

AU - Maschmann, W.

AU - McBride, P.

AU - Meyer, H.

AU - Muryn, B.

AU - Messing, F.

AU - Metzger, W. J.

AU - Monteleoni, B.

AU - Nernst, R.

AU - Niczyporuk, B.

AU - Nowak, G.

AU - Peck, C.

AU - Pelfer, P. G.

AU - Pollock, B.

AU - Porter, F. C.

AU - Prindle, D.

AU - Ratoff, P.

AU - Reidenbach, M.

AU - Renger, B.

AU - Rippich, C.

AU - Scheer, M.

AU - Schmitt, P.

AU - Schotanus, J.

AU - Schütte, J.

AU - Schwarz, A.

AU - Sievers, D.

AU - Skwarnicki, T.

AU - Stock, V.

AU - Strauch, K.

AU - Strohbusch, U.

AU - Tompkins, J.

AU - Trost, H. J.

AU - Van Uitert, B.

AU - Van De Walle, R. T.

AU - Vogel, H.

AU - Voigt, A.

AU - Volland, U.

AU - Wachs, K.

AU - Wacker, K.

AU - Walk, W.

AU - Wegener, H.

AU - Williams, D. A.

AU - Zschorsch, P.

PY - 1989/9/14

Y1 - 1989/9/14

N2 - The Crystal Ball detector at the Doris II storage ring at DESY has been used to study the electron energy spectrum of the decay τ→evv̄. In the standard model the Lorentz structure of the decay matrix element is of the well known V-A type, resulting in a Michel parameter of p=0.75. Our spectrum is found to be consistent with this value. A fit yields the value of 0.64±0.07.

AB - The Crystal Ball detector at the Doris II storage ring at DESY has been used to study the electron energy spectrum of the decay τ→evv̄. In the standard model the Lorentz structure of the decay matrix element is of the well known V-A type, resulting in a Michel parameter of p=0.75. Our spectrum is found to be consistent with this value. A fit yields the value of 0.64±0.07.

UR - http://www.scopus.com/inward/record.url?scp=0000924901&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000924901&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(89)90670-9

DO - 10.1016/0370-2693(89)90670-9

M3 - Article

AN - SCOPUS:0000924901

SN - 0370-2693

VL - 228

SP - 273

EP - 280

JO - Physics Letters B

JF - Physics Letters B

IS - 2

ER -

The Michel parameter for the decay τ→eνν

Abstract

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