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. 2005 Aug 26;95(9):092001.
doi: 10.1103/PhysRevLett.95.092001. Epub 2005 Aug 26.

Strange-quark contributions to parity-violating asymmetries in the forward g0 electron-proton scattering experiment

D S Armstrong  1 , 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 Marchand, 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; (G0 Collaboration)
Affiliations
Free article

Strange-quark contributions to parity-violating asymmetries in the forward g0 electron-proton scattering experiment

D S Armstrong et al. Phys Rev Lett. .
Free article

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.

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