Strange Quark Contributions to Parity-Violating Asymmetries in the Forward G0 Electron-Proton Scattering Experiment

Journal Article · Wed Jun 01 00:00:00 EDT 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.092001· OSTI ID:841146

Armstrong, David; Arvieux, Francois; Asaturyan, Razmik; Averett, Todd; Bailey, Stephanie; Batigne, Guillaume; Beck, Douglas; Beise, Elizabeth; Benesch, Jay; Bimbot, Louis; Birchall, James; Biselli, Angela; Bosted, Peter; Boukobza, Elodie; Breuer, Herbert; Carlini, Roger; Carr, R; Chant, Nicholas; Chao, Yu-Chiu; Chattopadhyay, Swapan ; Clark, Russell; Covrig, Silviu; Cowley, Anthony; Dale, Daniel; Davis, C; Falk, Willie; Finn, John; Forest, Tony; Franklin, Gregg; Furget, Christophe; Gaskell, David; Grames, Joseph; Griffioen, Keith; Grimm, Klaus; Guillon, Benoit; Guler, Hayko; Hannelius, Lars; Hasty, R; Allen, A Hawthorne; Horn, Tanja; Johnston, Kathleen; Jones, Mark; Kammel, Peter; Kazimi, Reza; King, Paul; Kolarkar, Ameya; Korkmaz, Elie; Korsch, Wolfgang; Kox, Serge; Kuhn, Joachim; Lachniet, Jeff; Lee, Lawrence; Lenoble, Jason; Liatard, Eric; Liu, J; Loupias, Berenice; Lung, A; MacLachlan, Glen; Marchand, Dominique; Martin, J W; McFarlane, Kenneth; Mckee, Daniella; McKeown, Robert; Merchez, Fernand; Mkrtchyan, Hamlet; Moffit, Bryan; Morlet, M; Nakagawa, Itaru; Nakahara, Kazutaka; Nakos, Melissa; Neveling, Retief; Niccolai, Silvia; Ong, S; Page, Shelley; Papavassiliou, Vassilios; Pate, Stephen; Phillips, Sarah; Pitt, Mark; Poelker, Benard; Porcelli, Tracy; Quemener, Gilles; Quinn, Brian; Ramsay, William; Rauf, Aamer; Real, Jean-Sebastien; Roche, Julie; Roos, Philip; Rutledge, Gary; Secrest, Jeffery; Simicevic, Neven; Smith, G R; Spayde, Damon; Stepanyan, Samuel; Stutzman, Marcy; Sulkosky, Vincent; Tadevosyan, Vardan; Tieulent, Raphael; de Wiele, Jacques Van; Oers, Willem van; Voutier, Eric; Vulcan, William; Warren, G; Wells, S P; Williamson, Steven; Wood, S A; Yan, Chen; Yun, Junho; Zeps, Valdis

We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < Q{sup 2} < 1.0 GeV{sup 2}. 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 JLab using a toroidal spectrometer to detect the recoiling protons from a liquid hydrogen target. The results indicate non-zero, Q{sup 2} dependent, strange quark contributions and provide new information beyond that obtained in previous experiments.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 841146
• Report Number(s): JLAB-PHY-05-315; DOE/ER/40150-3462; nucl-ex/0506021; TRN: US200513%%367
• Resource Relation: Journal Volume: 95; Journal Issue: 9; Other Information: No journal information given for this preprint; PBD: 1 Jun 2005
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
HYDROGEN
MOMENTUM TRANSFER
PROTONS
QUARKS
SCATTERING
SPECTROMETERS
WEAK INTERACTIONS