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Bueno JF, Bayes R, Davydov YI, Depommier P, Faszer W, Gagliardi CA, Gaponenko A, Gill DR, Grossheim A, Gumplinger P, Hasinoff MD, Henderson RS, Hillairet A, Hu J, Koetke DD, MacDonald RP, Marshall GM, Mathie EL, Mischke RE, Olchanski K, Olin A, Openshaw R, Poutissou JM, Poutissou R, Selivanov V, Sheffer G, Shin B, Stanislaus TDS, Tacik R, Tribble RE. Publisher’s Note: Precise measurement of parity violation in polarized muon decay [Phys. Rev. D84, 032005 (2011)]. Int J Clin Exp Med 2012. [DOI: 10.1103/physrevd.85.039908] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bayes R, Bueno JF, Hillairet A, Davydov YI, Depommier P, Faszer W, Gagliardi CA, Gaponenko A, Gill DR, Grossheim A, Gumplinger P, Hasinoff MD, Henderson RS, Hu J, Koetke DD, MacDonald RP, Marshall GM, Mathie EL, Mischke RE, Olchanski K, Olin A, Openshaw R, Poutissou JM, Poutissou R, Selivanov V, Sheffer G, Shin B, Stanislaus TDS, Tacik R, Tribble RE. Experimental constraints on left-right symmetric models from muon decay. Phys Rev Lett 2011; 106:041804. [PMID: 21405321 DOI: 10.1103/physrevlett.106.041804] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2010] [Indexed: 05/30/2023]
Abstract
The TWIST Collaboration has completed a new measurement of the energy-angle spectrum of positrons from the decay of highly polarized muons. A simultaneous measurement of the muon decay parameters ρ, δ, and P(μ)(π)ξ tests the standard model in a purely leptonic process and provides improved limits for relevant extensions to the standard model. Specifically, for the generalized left-right symmetric model |(g(R)/g(L))ζ|<0.020 and (g(L)/g(R))m(2)>578 GeV/c(2), both 90% C.L.
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Affiliation(s)
- R Bayes
- TRIUMF, Vancouver, British Columbia, Canada
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MacDonald RP, Bayes R, Bueno J, Davydov YI, Depommier P, Faszer W, Fujiwara MC, Gagliardi CA, Gaponenko A, Gill DR, Grossheim A, Gumplinger P, Hasinoff MD, Henderson RS, Hillairet A, Hu J, Jamieson B, Kitching P, Koetke DD, Marshall GM, Mathie EL, Mischke RE, Musser JR, Nozar M, Olchanski K, Olin A, Openshaw R, Poutissou JM, Poutissou R, Quraan MA, Selivanov V, Sheffer G, Shin B, Stanislaus TDS, Tacik R, Tribble RE. Precision measurement of the muon decay parametersρandδ. Int J Clin Exp Med 2008. [DOI: 10.1103/physrevd.78.032010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Jamieson B, Bayes R, Davydov YI, Depommier P, Doornbos J, Faszer W, Fujiwara MC, Gagliardi CA, Gaponenko A, Gill DR, Gumplinger P, Hasinoff MD, Henderson RS, Hu J, Kitching P, Koetke DD, Macdonald JA, MacDonald RP, Marshall GM, Mathie EL, Mischke RE, Musser JR, Nozar M, Olchanski K, Olin A, Openshaw R, Porcelli TA, Poutissou JM, Poutissou R, Quraan MA, Rodning NL, Selivanov V, Sheffer G, Shin B, Stanislaus TDS, Tacik R, Torokhov VD, Tribble RE, Vasiliev MA. Measurement ofPμξin polarized muon decay. Int J Clin Exp Med 2006. [DOI: 10.1103/physrevd.74.072007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Musser JR, Bayes R, Davydov YI, Depommier P, Doornbos J, Faszer W, Gagliardi CA, Gaponenko A, Gill DR, Green P, Gumplinger P, Hasinoff MD, Henderson RS, Hu J, Jamieson B, Kitching P, Koetke DD, Krushinsky AA, Lachin YY, Macdonald JA, MacDonald RP, Marshall GM, Mathie EL, Miasoedov LV, Mischke RE, Nord PM, Olchanski K, Olin A, Openshaw R, Porcelli TA, Poutissou JM, Poutissou R, Quraan MA, Rodning NL, Selivanov V, Sheffer G, Shin B, Sobratee F, Stanislaus TDS, Tacik R, Torokhov VD, Tribble RE, Vasiliev MA, Wright DH. Measurement of the Michel parameter rho in muon decay. Phys Rev Lett 2005; 94:101805. [PMID: 15783475 DOI: 10.1103/physrevlett.94.101805] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2004] [Indexed: 05/24/2023]
Abstract
The TWIST Collaboration has measured the Michel parameter rho in normal muon decay, mu(+)--> e(+)nu(e)nu (mu). In the standard model, rho = 3/4. Deviations from this value imply mixing of left- and right-handed muon and electron couplings. We find rho=0.750 80+/-0.000 32(stat) +/- 0.000 97(syst) +/- 0.000 23, where the last uncertainty represents the dependence of rho on the Michel parameter eta. This result sets new limits on the W(L)-W(R) mixing angle in left-right symmetric models.
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Affiliation(s)
- J R Musser
- Texas A&M University, College Station, Texas 77843, USA
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Rodning N, Andersson W, Davydov Y, Depommier P, Doornbos J, Faszer W, Gagliardi C, Gaponenko A, Gill D, Green P, Gumplinger P, Hardy J, Hasinoff M, Helmer R, Henderson R, Kitching P, Koetke D, Korkmaz E, Khruchinsky A, Maas D, Macdonald J, MacDonald R, Manweiler R, Marshall G, Mathie T, Musser J, Nord P, Olin A, Openshaw R, Ottewell D, Porcelli T, Poutissou JM, Poutissou R, Price G, Quraan M, Schaapman J, Selivanov V, Sheffer G, Shin B, Sobratee F, Soukup J, Stanislaus T, Stinson G, Tacik R, Torokhov V, Tribble R, Vasiliev M, Walter HC, Wang SC, Wright D. TWIST- The TRIUMF weak interaction symmetry test the Michel parameters from μ+ decay. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0920-5632(01)01232-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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