A measurement of the tau Michel parameters at SLD

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This thesis presents a measurement of the tau Michel parameters. This measurement utilizes the highly polarized SLC electron beam to extract these quantities directly from the measured tau decay spectra using the 1993--95 SLD sample of 4,528 tau pair events. The results are {rho}{sup e} = 0.71 {+-} 0.14 {+-} 0.05, {xi}{sup e} = 1.16 {+-} 0.52 {+-} 0.06, and ({xi}{delta}){sup e} = 0.85 {+-} 0.43 {+-} 0.08 for tau decays to electrons and {rho}{sup {mu}} = 0.54 {+-} 0.28 {sup {minus}} 0.14, {eta}{sup {mu}} = {minus}0.59 {+-} 0.82 {+-} 0.45, {xi}{sup {mu}} = 0.75 {+-} 0.50 {+-} 0.14, and ... continued below

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165 p.

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Quigley, J. May 1, 1997.

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Description

This thesis presents a measurement of the tau Michel parameters. This measurement utilizes the highly polarized SLC electron beam to extract these quantities directly from the measured tau decay spectra using the 1993--95 SLD sample of 4,528 tau pair events. The results are {rho}{sup e} = 0.71 {+-} 0.14 {+-} 0.05, {xi}{sup e} = 1.16 {+-} 0.52 {+-} 0.06, and ({xi}{delta}){sup e} = 0.85 {+-} 0.43 {+-} 0.08 for tau decays to electrons and {rho}{sup {mu}} = 0.54 {+-} 0.28 {sup {minus}} 0.14, {eta}{sup {mu}} = {minus}0.59 {+-} 0.82 {+-} 0.45, {xi}{sup {mu}} = 0.75 {+-} 0.50 {+-} 0.14, and ({xi}{delta}){sup {mu}} = 0.82 {+-} 0.32 {+-} 0.07 for tau decays to muons. Combining all leptonic tau decays gives {rho} = 0.72 {+-} 0.09 {+-} 0.03, {xi} = 1.05 {+-} 0.35 {+-} 0.04, and {Xi}{delta} = 0.88 {+-} 0.27 {+-} 0.04. These results agree well with the current world average and the Standard Model.

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165 p.

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INIS; OSTI as DE97008277

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE97008277
  • Report No.: SLAC-R--506
  • Grant Number: AC03-76SF00515
  • Office of Scientific & Technical Information Report Number: 515578
  • Archival Resource Key: ark:/67531/metadc694930

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  • May 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 5, 2016, 7:05 p.m.

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Quigley, J. A measurement of the tau Michel parameters at SLD, thesis or dissertation, May 1, 1997; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc694930/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.