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Title: A Measurement of the Michel Parameters in Leptonic Decays of the Tau

Abstract

We have measured the spectral shape Michel parameters {rho} and {eta} using leptonic decays of the {tau} , recorded by the CLEO II detector. Assuming e-{mu} universality in the vectorlike couplings, we find {rho}{sub e{mu}}=0.735{plus_minus}0.013{plus_minus}0.008 and {eta}{sub e{mu}}=-0.015{plus_minus}0.061{plus_minus}0.062 , where the first error is statistical and the second systematic. We also present measurements for the parameters for e and {mu} final states separately. {copyright} {ital 1997} {ital The American Physical Society}

Authors:
; ; ; ; ; ; ; ; ; ;  [1]; ; ; ; ; ; ; ; ;  [2] more »; ; ; ; ; ; ;  [3]; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [4]; ; ; ; ;  [5]; ; ; ; ; ; ; ;  [6]; ; ; ; ; ;  [7]; ; ; ; ; ; ; ;  [8]; ; ; ; ; ; ; ; ; ;  [9]; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [10]; ; ; ; « less
+ Show Author Affiliations
  1. University of Kansas, Lawrence, Kansas 66045 (United States)
  2. University of Minnesota, Minneapolis, Minnesota 55455 (United States)
  3. State University of New York at Albany, Albany, New York 12222 (United States)
  4. Ohio State University, Columbus, Ohio 43210 (United States)
  5. University of Oklahoma, Norman, Oklahoma 73019 (United States)
  6. Purdue University, West Lafayette, Indiana 47907 (United States)
  7. University of Rochester, Rochester, New York 14627 (United States)
  8. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
  9. Southern Methodist University, Dallas, Texas 75275 (United States)
  10. Syracuse University, Syracuse, New York 13244 (United States)
Publication Date:
OSTI Identifier:
628687
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 78; Journal Issue: 25; Other Information: PBD: Jun 1997
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; TAU PARTICLES; LEPTONIC DECAY; SPECTRAL FUNCTIONS; SHAPE; HIGGS BOSONS; MASS

Citation Formats

Ammar, R, Baringer, P, Bean, A, Besson, D, Coppage, D, Darling, C, Davis, R, Hancock, N, Kotov, S, Kravchenko, I, Kwak, N, Anderson, S, Kubota, Y, Lattery, M, ONeill, J J, Patton, S, Poling, R, Riehle, T, Savinov, V, Smith, A, Alam, M S, Athar, S B, Ling, Z, Mahmood, A H, Severini, H, Timm, S, Wappler, F, Anastassov, A, Blinov, S, Duboscq, J E, Fujino, D, Fulton, R, Gan, K K, Hart, T, Honscheid, K, Kagan, H, Kass, R, Lee, J, Spencer, M B, Sung, M, Undrus, A, Wanke, R, Wolf, A, Zoeller, M, Nemati, B, Richichi, S J, Ross, W R, Skubic, P, Wood, M, Bishai, M, Fast, J, Gerndt, E, Hinson, J W, Menon, N, Miller, D H, Shibata, E I, Shipsey, I P, Yurko, M, Gibbons, L, Johnson, S D, Kwon, Y, Roberts, S, Thorndike, E H, Jessop, C P, Lingel, K, Marsiske, H, Perl, M L, Schaffner, S F, Ugolini, D, Wang, R, Zhou, X, Coan, T E, Fadeyev, V, Korolkov, I, Maravin, Y, Narsky, I, Shelkov, V, Staeck, J, Stroynowski, R, Volobouev, I, Ye, J, Artuso, M, Efimov, A, Frasconi, F, Gao, M, Goldberg, M, He, D, Kopp, S, Moneti, G C, Mountain, R, Mukhin, Y, Schuh, S, Skwarnicki, T, Stone, S, Viehhauser, G, Xing, X, Bartelt, J, Csorna, S E, Jain, V, and others, and. A Measurement of the Michel Parameters in Leptonic Decays of the Tau. United States: N. p., 1997. Web. doi:10.1103/PhysRevLett.78.4686.
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Ammar, R, Baringer, P, Bean, A, Besson, D, Coppage, D, Darling, C, Davis, R, Hancock, N, Kotov, S, Kravchenko, I, Kwak, N, Anderson, S, Kubota, Y, Lattery, M, ONeill, J J, Patton, S, Poling, R, Riehle, T, Savinov, V, Smith, A, Alam, M S, Athar, S B, Ling, Z, Mahmood, A H, Severini, H, Timm, S, Wappler, F, Anastassov, A, Blinov, S, Duboscq, J E, Fujino, D, Fulton, R, Gan, K K, Hart, T, Honscheid, K, Kagan, H, Kass, R, Lee, J, Spencer, M B, Sung, M, Undrus, A, Wanke, R, Wolf, A, Zoeller, M, Nemati, B, Richichi, S J, Ross, W R, Skubic, P, Wood, M, Bishai, M, Fast, J, Gerndt, E, Hinson, J W, Menon, N, Miller, D H, Shibata, E I, Shipsey, I P, Yurko, M, Gibbons, L, Johnson, S D, Kwon, Y, Roberts, S, Thorndike, E H, Jessop, C P, Lingel, K, Marsiske, H, Perl, M L, Schaffner, S F, Ugolini, D, Wang, R, Zhou, X, Coan, T E, Fadeyev, V, Korolkov, I, Maravin, Y, Narsky, I, Shelkov, V, Staeck, J, Stroynowski, R, Volobouev, I, Ye, J, Artuso, M, Efimov, A, Frasconi, F, Gao, M, Goldberg, M, He, D, Kopp, S, Moneti, G C, Mountain, R, Mukhin, Y, Schuh, S, Skwarnicki, T, Stone, S, Viehhauser, G, Xing, X, Bartelt, J, Csorna, S E, Jain, V, & others, and. A Measurement of the Michel Parameters in Leptonic Decays of the Tau. United States. https://doi.org/10.1103/PhysRevLett.78.4686
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Ammar, R, Baringer, P, Bean, A, Besson, D, Coppage, D, Darling, C, Davis, R, Hancock, N, Kotov, S, Kravchenko, I, Kwak, N, Anderson, S, Kubota, Y, Lattery, M, ONeill, J J, Patton, S, Poling, R, Riehle, T, Savinov, V, Smith, A, Alam, M S, Athar, S B, Ling, Z, Mahmood, A H, Severini, H, Timm, S, Wappler, F, Anastassov, A, Blinov, S, Duboscq, J E, Fujino, D, Fulton, R, Gan, K K, Hart, T, Honscheid, K, Kagan, H, Kass, R, Lee, J, Spencer, M B, Sung, M, Undrus, A, Wanke, R, Wolf, A, Zoeller, M, Nemati, B, Richichi, S J, Ross, W R, Skubic, P, Wood, M, Bishai, M, Fast, J, Gerndt, E, Hinson, J W, Menon, N, Miller, D H, Shibata, E I, Shipsey, I P, Yurko, M, Gibbons, L, Johnson, S D, Kwon, Y, Roberts, S, Thorndike, E H, Jessop, C P, Lingel, K, Marsiske, H, Perl, M L, Schaffner, S F, Ugolini, D, Wang, R, Zhou, X, Coan, T E, Fadeyev, V, Korolkov, I, Maravin, Y, Narsky, I, Shelkov, V, Staeck, J, Stroynowski, R, Volobouev, I, Ye, J, Artuso, M, Efimov, A, Frasconi, F, Gao, M, Goldberg, M, He, D, Kopp, S, Moneti, G C, Mountain, R, Mukhin, Y, Schuh, S, Skwarnicki, T, Stone, S, Viehhauser, G, Xing, X, Bartelt, J, Csorna, S E, Jain, V, and others, and. 1997. "A Measurement of the Michel Parameters in Leptonic Decays of the Tau". United States. https://doi.org/10.1103/PhysRevLett.78.4686.
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@article{osti_628687,
title = {A Measurement of the Michel Parameters in Leptonic Decays of the Tau},
author = {Ammar, R and Baringer, P and Bean, A and Besson, D and Coppage, D and Darling, C and Davis, R and Hancock, N and Kotov, S and Kravchenko, I and Kwak, N and Anderson, S and Kubota, Y and Lattery, M and ONeill, J J and Patton, S and Poling, R and Riehle, T and Savinov, V and Smith, A and Alam, M S and Athar, S B and Ling, Z and Mahmood, A H and Severini, H and Timm, S and Wappler, F and Anastassov, A and Blinov, S and Duboscq, J E and Fujino, D and Fulton, R and Gan, K K and Hart, T and Honscheid, K and Kagan, H and Kass, R and Lee, J and Spencer, M B and Sung, M and Undrus, A and Wanke, R and Wolf, A and Zoeller, M and Nemati, B and Richichi, S J and Ross, W R and Skubic, P and Wood, M and Bishai, M and Fast, J and Gerndt, E and Hinson, J W and Menon, N and Miller, D H and Shibata, E I and Shipsey, I P and Yurko, M and Gibbons, L and Johnson, S D and Kwon, Y and Roberts, S and Thorndike, E H and Jessop, C P and Lingel, K and Marsiske, H and Perl, M L and Schaffner, S F and Ugolini, D and Wang, R and Zhou, X and Coan, T E and Fadeyev, V and Korolkov, I and Maravin, Y and Narsky, I and Shelkov, V and Staeck, J and Stroynowski, R and Volobouev, I and Ye, J and Artuso, M and Efimov, A and Frasconi, F and Gao, M and Goldberg, M and He, D and Kopp, S and Moneti, G C and Mountain, R and Mukhin, Y and Schuh, S and Skwarnicki, T and Stone, S and Viehhauser, G and Xing, X and Bartelt, J and Csorna, S E and Jain, V and others, and},
abstractNote = {We have measured the spectral shape Michel parameters {rho} and {eta} using leptonic decays of the {tau} , recorded by the CLEO II detector. Assuming e-{mu} universality in the vectorlike couplings, we find {rho}{sub e{mu}}=0.735{plus_minus}0.013{plus_minus}0.008 and {eta}{sub e{mu}}=-0.015{plus_minus}0.061{plus_minus}0.062 , where the first error is statistical and the second systematic. We also present measurements for the parameters for e and {mu} final states separately. {copyright} {ital 1997} {ital The American Physical Society}},
doi = {10.1103/PhysRevLett.78.4686},
url = {https://www.osti.gov/biblio/628687}, journal = {Physical Review Letters},
number = 25,
volume = 78,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 1997},
month = {Sun Jun 01 00:00:00 EDT 1997}
}
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Journal Article:
https://doi.org/10.1103/PhysRevLett.78.4686
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