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23 April 2024

» pubmed » pmid16197209

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Strange-quark contributions to parity-violating asymmetries in the forward g0 electron-proton scattering experiment
D S Armstrong ; J Arvieux ; R Asaturyan ; T Averett ; S L Bailey ; G Batigne ; D H Beck ; E J Beise ; J Benesch ; L Bimbot ; J Birchall ; A Biselli ; P Bosted ; E Boukobza ; H Breuer ; R Carlini ; R Carr ; N Chant ; Y-C Chao ; S Chattopadhyay ; R Clark ; S Covrig ; A Cowley ; D Dale ; C Davis ; W Falk ; J M Finn ; T Forest ; G Franklin ; C Furget ; D Gaskell ; J Grames ; K A Griffioen ; K Grimm ; B Guillon ; H Guler ; L Hannelius ; R Hasty ; A Hawthorne Allen ; T Horn ; K Johnston ; M Jones ; P Kammel ; R Kazimi ; P M King ; A Kolarkar ; E Korkmaz ; W Korsch ; S Kox ; J Kuhn ; J Lachniet ; L Lee ; J Lenoble ; E Liatard ; J Liu ; B Loupias ; A Lung ; G A MacLachlan ; D March ; J W Martin ; K W McFarlane ; D W McKee ; R D McKeown ; F Merchez ; H Mkrtchyan ; B Moffit ; M Morlet ; I Nakagawa ; K Nakahara ; M Nakos ; R Neveling ; S Niccolai ; S Ong ; S Page ; V Papavassiliou ; S F Pate ; S K Phillips ; M L Pitt ; M Poelker ; T A Porcelli ; G Quéméner ; B Quinn ; W D Ramsay ; A W Rauf ; J-S Real ; J Roche ; P Roos ; G A Rutledge ; J Secrest ; N Simicevic ; G R Smith ; D T Spayde ; S Stepanyan ; M Stutzman ; V Sulkosky ; V Tadevosyan ; R Tieulent ; J van de Wiele ; W van Oers ; E Voutier ; W Vulcan ; G Warren ; S P Wells ; S E Williamson ; S A Wood ; C Yan ; J Yun ; V Zeps ; ;
Date:	26 Aug 2005
Journal:	Phys Rev Lett, 95 (9), 092001
Abstract:	We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < or =Q2 < or =1.0 GeV2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are sensitive to strange-quark contributions to the currents of the proton. The measurements were made at Jefferson Laboratory using a toroidal spectrometer to detect the recoiling protons from a liquid hydrogen target. The results indicate nonzero, Q2 dependent, strange-quark contributions and provide new information beyond that obtained in previous experiments.
Source:	PubMed, pmid16197209
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