• Login
    View Item 
    •   Home
    • Faculty/ Researcher Works
    • Faculty/ Researcher Works
    • View Item
    •   Home
    • Faculty/ Researcher Works
    • Faculty/ Researcher Works
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of TUScholarShareCommunitiesDateAuthorsTitlesSubjectsGenresThis CollectionDateAuthorsTitlesSubjectsGenres

    My Account

    LoginRegister

    Help

    AboutPeoplePoliciesHelp for DepositorsData DepositFAQs

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Towards a resolution of the proton form factor problem: New electron and positron scattering data

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    1411.6908v1.pdf
    Size:
    533.5Kb
    Format:
    PDF
    Download
    Genre
    Journal Article
    Date
    2015-02-10
    Author
    Adikaram, D
    Rimal, D
    Weinstein, LB
    Raue, B
    Khetarpal, P
    Bennett, RP
    Arrington, J
    Brooks, WK
    Adhikari, KP
    Afanasev, AV
    Amaryan, MJ
    Anderson, MD
    Anefalos Pereira, S
    Avakian, H
    Ball, J
    Battaglieri, M
    Bedlinskiy, I
    Biselli, AS
    Bono, J
    Boiarinov, S
    Briscoe, WJ
    Burkert, VD
    Carman, DS
    Careccia, S
    Celentano, A
    Chandavar, S
    Charles, G
    Colaneri, L
    Cole, PL
    Contalbrigo, M
    Crede, V
    D'Angelo, A
    Dashyan, N
    De Vita, R
    De Sanctis, E
    Deur, A
    Djalali, C
    Dodge, GE
    Dupre, R
    Egiyan, H
    El Alaoui, A
    El Fassi, L
    Elouadrhiri, L
    Eugenio, P
    Fedotov, G
    Fegan, S
    Filippi, A
    Fleming, JA
    Fradi, A
    Garillon, B
    Gilfoyle, GP
    Giovanetti, KL
    Girod, FX
    Goetz, JT
    Gohn, W
    Golovatch, E
    Gothe, RW
    Griffioen, KA
    Guegan, B
    Guidal, M
    Guo, L
    Hafidi, K
    Hakobyan, H
    Hanretty, C
    Harrison, N
    Hattawy, M
    Hicks, K
    Holtrop, M
    Hughes, SM
    Hyde, CE
    Ilieva, Y
    Ireland, DG
    Ishkhanov, BS
    Jenkins, D
    Jiang, H
    Jo, HS
    Joo, K
    Joosten, S
    Kalantarians, N
    Keller, D
    Khandaker, M
    Kim, A
    Kim, W
    Klein, A
    Klein, FJ
    Koirala, S
    Kubarovsky, V
    Kuhn, SE
    Livingston, K
    Lu, HY
    MacGregor, IJD
    Markov, N
    Mattione, P
    Mayer, M
    McKinnon, B
    Mestayer, MD
    Meyer, CA
    Mirazita, M
    Mokeev, V
    Montgomery, RA
    Show allShow less
    Subject
    CLAS Collaboration
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/5819
    
    Metadata
    Show full item record
    DOI
    10.1103/PhysRevLett.114.062003
    Abstract
    © 2015 American Physical Society. There is a significant discrepancy between the values of the proton electric form factor, GEp, extracted using unpolarized and polarized electron scattering. Calculations predict that small two-photon exchange (TPE) contributions can significantly affect the extraction of GEp from the unpolarized electron-proton cross sections. We determined the TPE contribution by measuring the ratio of positron-proton to electron-proton elastic scattering cross sections using a simultaneous, tertiary electron-positron beam incident on a liquid hydrogen target and detecting the scattered particles in the Jefferson Lab CLAS detector. This novel technique allowed us to cover a wide range in virtual photon polarization and momentum transfer (Q2) simultaneously, as well as to cancel luminosity-related systematic errors. The cross section ratio increases with decreasing at Q2=1.45GeV2. This measurement is consistent with the size of the form factor discrepancy at Q2≈1.75GeV2 and with hadronic calculations including nucleon and Δ intermediate states, which have been shown to resolve the discrepancy up to 2-3GeV2.
    Citation to related work
    American Physical Society (APS)
    Has part
    Physical Review Letters
    ADA compliance
    For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/5801
    Scopus Count
    Collections
    Faculty/ Researcher Works

    entitlement

     
    DSpace software (copyright © 2002 - 2023)  DuraSpace
    Temple University Libraries | 1900 N. 13th Street | Philadelphia, PA 19122
    (215) 204-8212 | scholarshare@temple.edu
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.