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24 April 2024

» pubmed » pmid15169482

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Observation of parity nonconservation in møller scattering
P L Anthony ; R G Arnold ; C Arroyo ; K Baird ; K Bega ; J Biesiada ; P E Bosted ; M Breuer ; R Carr ; G D Cates ; J-P Chen ; E Chudakov ; M Cooke ; F J Decker ; P Decowski ; A Deur ; W Emam ; R Erickson ; T Fieguth ; C Field ; J Gao ; K Gustafsson ; R S Hicks ; R Holmes ; E W Hughes ; T B Humensky ; G M Jones ; L J Kaufman ; Yu G Kolomensky ; K S Kumar ; D Lhuillier ; R Lombard-Nelsen ; P Mastromarino ; B Mayer ; R D McKeown ; R Michaels ; M Olson ; K D Paschke ; G A Peterson ; R Pitthan ; K Pope ; D Relyea ; S E Rock ; O Saxton ; G Shapiro ; J Singh ; P A Souder ; Z M Szalata ; W A Tobias ; B T Tonguc ; J Turner ; B Tweedie ; A Vacheret ; D Walz ; T Weber ; J Weisend ; D Whittum ; M Woods ; I Younus ; ;
Date:	7 May 2004
Journal:	Phys Rev Lett, 92 (18), 181602
Abstract:	We report a measurement of the parity-violating asymmetry in fixed target electron-electron (Møller) scattering: A(PV)=[-175+/-30(stat)+/-20(syst)] x 10(-9). This first direct observation of parity nonconservation in Møller scattering leads to a measurement of the electron’s weak charge at low energy Q(e)(W)=-0.053+/-0.011. This is consistent with the standard model expectation at the current level of precision: sin((2)theta(W)(M(Z))((-)MS)=0.2293+/-0.0024(stat)+/-0.0016(syst)+/-0.0006(theory).
Source:	PubMed, pmid15169482
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