Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering
We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75 (GeV/c)^{2}. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q^{2} and double the range over which a l...
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| Veröffentlicht in: | Physical review letters 2022-03, Vol.128 (10), p.102002-102002, Article 102002 |
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| creator | Christy, M E Gautam, T Ou, L Schmookler, B Wang, Y Adikaram, D Ahmed, Z Albataineh, H Ali, S F Aljawrneh, B Allada, K Allison, S L Alsalmi, S Androic, D Aniol, K Annand, J Arrington, J Atac, H Averett, T Ayerbe Gayoso, C Bai, X Bane, J Barcus, S Bartlett, K Bellini, V Beminiwattha, R Bericic, J Bhatt, H Bhetuwal, D Biswas, D Brash, E Bulumulla, D Camacho, C M Campbell, J Camsonne, A Carmignotto, M Castellanos, J Chen, C Chen, J-P Chetry, T Cisbani, E Clary, B Cohen, E Compton, N Cornejo, J C Covrig Dusa, S Crowe, B Danagoulian, S Danley, T Deconinck, W Defurne, M Desnault, C Di, D Dlamini, M Duer, M Duran, B Ent, R Fanelli, C Fuchey, E Gal, C Gaskell, D Georges, F Gilad, S Glamazdin, O Gnanvo, K Gramolin, A V Gray, V M Gu, C Habarakada, A Hague, T Hamad, G Hamilton, D Hamilton, K Hansen, O Hauenstein, F Hernandez, A V Henry, W Higinbotham, D W Holmstrom, T Horn, T Huang, Y Huber, G M Hyde, C Ibrahim, H Israel, N Jen, C-M Jin, K Jones, M Kabir, A Karki, B Keppel, C Khachatryan, V King, P M Li, S Li, W Liu, H Liu, J Liyanage, A H Mack, D Magee, J |
| description | We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75 (GeV/c)^{2}. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q^{2} and double the range over which a longitudinal or transverse separation of the cross section can be performed. The difference between our results and polarization data agrees with that observed at lower Q^{2} and attributed to hard two-photon exchange (TPE) effects, extending to 8 (GeV/c)^{2} the range of Q^{2} for which a discrepancy is established at >95% confidence. We use the discrepancy to quantify the size of TPE contributions needed to explain the cross section at high Q^{2}. |
| doi_str_mv | 10.1103/PhysRevLett.128.102002 |
| format | Article |
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(LBNL), Berkeley, CA (United States) ; Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States) ; Argonne National Lab. (ANL), Argonne, IL (United States)</creatorcontrib><description>We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75 (GeV/c)^{2}. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q^{2} and double the range over which a longitudinal or transverse separation of the cross section can be performed. The difference between our results and polarization data agrees with that observed at lower Q^{2} and attributed to hard two-photon exchange (TPE) effects, extending to 8 (GeV/c)^{2} the range of Q^{2} for which a discrepancy is established at >95% confidence. We use the discrepancy to quantify the size of TPE contributions needed to explain the cross section at high Q^{2}.</description><identifier>ISSN: 0031-9007</identifier><identifier>EISSN: 1079-7114</identifier><identifier>DOI: 10.1103/PhysRevLett.128.102002</identifier><identifier>PMID: 35333083</identifier><language>eng</language><publisher>United States: American Physical Society</publisher><subject>form factors ; High Energy Physics - Experiment ; Nuclear Experiment ; Physics ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; quark model ; strong interaction</subject><ispartof>Physical review letters, 2022-03, Vol.128 (10), p.102002-102002, Article 102002</ispartof><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c372t-dba9eb8a5da9e0f0dac99eb7364f7af6769a0e01325b1551a63e87ac64861cd23</citedby><cites>FETCH-LOGICAL-c372t-dba9eb8a5da9e0f0dac99eb7364f7af6769a0e01325b1551a63e87ac64861cd23</cites><orcidid>0000-0003-4990-3369 ; 0000-0003-0976-0228 ; 0000-0001-5913-0596 ; 0000-0003-2300-2626 ; 0000-0002-8945-5305 ; 0000-0001-6069-3409 ; 0000-0002-6278-1178</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,2863,2864,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/35333083$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-03178610$$DView record in HAL$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/servlets/purl/1854551$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Christy, M E</creatorcontrib><creatorcontrib>Gautam, T</creatorcontrib><creatorcontrib>Ou, L</creatorcontrib><creatorcontrib>Schmookler, B</creatorcontrib><creatorcontrib>Wang, Y</creatorcontrib><creatorcontrib>Adikaram, D</creatorcontrib><creatorcontrib>Ahmed, Z</creatorcontrib><creatorcontrib>Albataineh, H</creatorcontrib><creatorcontrib>Ali, S F</creatorcontrib><creatorcontrib>Aljawrneh, B</creatorcontrib><creatorcontrib>Allada, K</creatorcontrib><creatorcontrib>Allison, S L</creatorcontrib><creatorcontrib>Alsalmi, S</creatorcontrib><creatorcontrib>Androic, D</creatorcontrib><creatorcontrib>Aniol, K</creatorcontrib><creatorcontrib>Annand, J</creatorcontrib><creatorcontrib>Arrington, J</creatorcontrib><creatorcontrib>Atac, H</creatorcontrib><creatorcontrib>Averett, T</creatorcontrib><creatorcontrib>Ayerbe Gayoso, C</creatorcontrib><creatorcontrib>Bai, X</creatorcontrib><creatorcontrib>Bane, J</creatorcontrib><creatorcontrib>Barcus, S</creatorcontrib><creatorcontrib>Bartlett, K</creatorcontrib><creatorcontrib>Bellini, V</creatorcontrib><creatorcontrib>Beminiwattha, R</creatorcontrib><creatorcontrib>Bericic, J</creatorcontrib><creatorcontrib>Bhatt, H</creatorcontrib><creatorcontrib>Bhetuwal, D</creatorcontrib><creatorcontrib>Biswas, D</creatorcontrib><creatorcontrib>Brash, E</creatorcontrib><creatorcontrib>Bulumulla, D</creatorcontrib><creatorcontrib>Camacho, C M</creatorcontrib><creatorcontrib>Campbell, J</creatorcontrib><creatorcontrib>Camsonne, A</creatorcontrib><creatorcontrib>Carmignotto, M</creatorcontrib><creatorcontrib>Castellanos, J</creatorcontrib><creatorcontrib>Chen, C</creatorcontrib><creatorcontrib>Chen, J-P</creatorcontrib><creatorcontrib>Chetry, T</creatorcontrib><creatorcontrib>Cisbani, E</creatorcontrib><creatorcontrib>Clary, B</creatorcontrib><creatorcontrib>Cohen, E</creatorcontrib><creatorcontrib>Compton, N</creatorcontrib><creatorcontrib>Cornejo, J C</creatorcontrib><creatorcontrib>Covrig Dusa, S</creatorcontrib><creatorcontrib>Crowe, B</creatorcontrib><creatorcontrib>Danagoulian, S</creatorcontrib><creatorcontrib>Danley, T</creatorcontrib><creatorcontrib>Deconinck, W</creatorcontrib><creatorcontrib>Defurne, M</creatorcontrib><creatorcontrib>Desnault, C</creatorcontrib><creatorcontrib>Di, D</creatorcontrib><creatorcontrib>Dlamini, M</creatorcontrib><creatorcontrib>Duer, M</creatorcontrib><creatorcontrib>Duran, B</creatorcontrib><creatorcontrib>Ent, R</creatorcontrib><creatorcontrib>Fanelli, C</creatorcontrib><creatorcontrib>Fuchey, E</creatorcontrib><creatorcontrib>Gal, C</creatorcontrib><creatorcontrib>Gaskell, D</creatorcontrib><creatorcontrib>Georges, F</creatorcontrib><creatorcontrib>Gilad, S</creatorcontrib><creatorcontrib>Glamazdin, O</creatorcontrib><creatorcontrib>Gnanvo, K</creatorcontrib><creatorcontrib>Gramolin, A V</creatorcontrib><creatorcontrib>Gray, V M</creatorcontrib><creatorcontrib>Gu, C</creatorcontrib><creatorcontrib>Habarakada, A</creatorcontrib><creatorcontrib>Hague, T</creatorcontrib><creatorcontrib>Hamad, G</creatorcontrib><creatorcontrib>Hamilton, D</creatorcontrib><creatorcontrib>Hamilton, K</creatorcontrib><creatorcontrib>Hansen, O</creatorcontrib><creatorcontrib>Hauenstein, F</creatorcontrib><creatorcontrib>Hernandez, A V</creatorcontrib><creatorcontrib>Henry, W</creatorcontrib><creatorcontrib>Higinbotham, D W</creatorcontrib><creatorcontrib>Holmstrom, T</creatorcontrib><creatorcontrib>Horn, T</creatorcontrib><creatorcontrib>Huang, Y</creatorcontrib><creatorcontrib>Huber, G M</creatorcontrib><creatorcontrib>Hyde, C</creatorcontrib><creatorcontrib>Ibrahim, H</creatorcontrib><creatorcontrib>Israel, N</creatorcontrib><creatorcontrib>Jen, C-M</creatorcontrib><creatorcontrib>Jin, K</creatorcontrib><creatorcontrib>Jones, M</creatorcontrib><creatorcontrib>Kabir, A</creatorcontrib><creatorcontrib>Karki, B</creatorcontrib><creatorcontrib>Keppel, C</creatorcontrib><creatorcontrib>Khachatryan, V</creatorcontrib><creatorcontrib>King, P M</creatorcontrib><creatorcontrib>Li, S</creatorcontrib><creatorcontrib>Li, W</creatorcontrib><creatorcontrib>Liu, H</creatorcontrib><creatorcontrib>Liu, J</creatorcontrib><creatorcontrib>Liyanage, A H</creatorcontrib><creatorcontrib>Mack, D</creatorcontrib><creatorcontrib>Magee, J</creatorcontrib><creatorcontrib>Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)</creatorcontrib><creatorcontrib>Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)</creatorcontrib><creatorcontrib>Argonne National Lab. (ANL), Argonne, IL (United States)</creatorcontrib><title>Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering</title><title>Physical review letters</title><addtitle>Phys Rev Lett</addtitle><description>We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75 (GeV/c)^{2}. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q^{2} and double the range over which a longitudinal or transverse separation of the cross section can be performed. The difference between our results and polarization data agrees with that observed at lower Q^{2} and attributed to hard two-photon exchange (TPE) effects, extending to 8 (GeV/c)^{2} the range of Q^{2} for which a discrepancy is established at >95% confidence. We use the discrepancy to quantify the size of TPE contributions needed to explain the cross section at high Q^{2}.</description><subject>form factors</subject><subject>High Energy Physics - Experiment</subject><subject>Nuclear Experiment</subject><subject>Physics</subject><subject>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</subject><subject>quark model</subject><subject>strong 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Bartlett, K ; Bellini, V ; Beminiwattha, R ; Bericic, J ; Bhatt, H ; Bhetuwal, D ; Biswas, D ; Brash, E ; Bulumulla, D ; Camacho, C M ; Campbell, J ; Camsonne, A ; Carmignotto, M ; Castellanos, J ; Chen, C ; Chen, J-P ; Chetry, T ; Cisbani, E ; Clary, B ; Cohen, E ; Compton, N ; Cornejo, J C ; Covrig Dusa, S ; Crowe, B ; Danagoulian, S ; Danley, T ; Deconinck, W ; Defurne, M ; Desnault, C ; Di, D ; Dlamini, M ; Duer, M ; Duran, B ; Ent, R ; Fanelli, C ; Fuchey, E ; Gal, C ; Gaskell, D ; Georges, F ; Gilad, S ; Glamazdin, O ; Gnanvo, K ; Gramolin, A V ; Gray, V M ; Gu, C ; Habarakada, A ; Hague, T ; Hamad, G ; Hamilton, D ; Hamilton, K ; Hansen, O ; Hauenstein, F ; Hernandez, A V ; Henry, W ; Higinbotham, D W ; Holmstrom, T ; Horn, T ; Huang, Y ; Huber, G M ; Hyde, C ; Ibrahim, H ; Israel, N ; Jen, C-M ; Jin, K ; Jones, M ; Kabir, A ; Karki, B ; Keppel, C ; Khachatryan, V ; King, P M ; Li, S ; Li, W ; Liu, H ; Liu, J ; Liyanage, A H ; Mack, D ; Magee, J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c372t-dba9eb8a5da9e0f0dac99eb7364f7af6769a0e01325b1551a63e87ac64861cd23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>form factors</topic><topic>High Energy Physics - Experiment</topic><topic>Nuclear Experiment</topic><topic>Physics</topic><topic>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</topic><topic>quark model</topic><topic>strong interaction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Christy, M E</creatorcontrib><creatorcontrib>Gautam, T</creatorcontrib><creatorcontrib>Ou, L</creatorcontrib><creatorcontrib>Schmookler, B</creatorcontrib><creatorcontrib>Wang, Y</creatorcontrib><creatorcontrib>Adikaram, D</creatorcontrib><creatorcontrib>Ahmed, Z</creatorcontrib><creatorcontrib>Albataineh, H</creatorcontrib><creatorcontrib>Ali, S F</creatorcontrib><creatorcontrib>Aljawrneh, B</creatorcontrib><creatorcontrib>Allada, K</creatorcontrib><creatorcontrib>Allison, S L</creatorcontrib><creatorcontrib>Alsalmi, S</creatorcontrib><creatorcontrib>Androic, D</creatorcontrib><creatorcontrib>Aniol, K</creatorcontrib><creatorcontrib>Annand, J</creatorcontrib><creatorcontrib>Arrington, J</creatorcontrib><creatorcontrib>Atac, H</creatorcontrib><creatorcontrib>Averett, T</creatorcontrib><creatorcontrib>Ayerbe Gayoso, C</creatorcontrib><creatorcontrib>Bai, X</creatorcontrib><creatorcontrib>Bane, J</creatorcontrib><creatorcontrib>Barcus, S</creatorcontrib><creatorcontrib>Bartlett, K</creatorcontrib><creatorcontrib>Bellini, V</creatorcontrib><creatorcontrib>Beminiwattha, R</creatorcontrib><creatorcontrib>Bericic, J</creatorcontrib><creatorcontrib>Bhatt, H</creatorcontrib><creatorcontrib>Bhetuwal, D</creatorcontrib><creatorcontrib>Biswas, D</creatorcontrib><creatorcontrib>Brash, E</creatorcontrib><creatorcontrib>Bulumulla, D</creatorcontrib><creatorcontrib>Camacho, C M</creatorcontrib><creatorcontrib>Campbell, J</creatorcontrib><creatorcontrib>Camsonne, A</creatorcontrib><creatorcontrib>Carmignotto, M</creatorcontrib><creatorcontrib>Castellanos, J</creatorcontrib><creatorcontrib>Chen, C</creatorcontrib><creatorcontrib>Chen, J-P</creatorcontrib><creatorcontrib>Chetry, T</creatorcontrib><creatorcontrib>Cisbani, E</creatorcontrib><creatorcontrib>Clary, B</creatorcontrib><creatorcontrib>Cohen, E</creatorcontrib><creatorcontrib>Compton, N</creatorcontrib><creatorcontrib>Cornejo, J C</creatorcontrib><creatorcontrib>Covrig Dusa, S</creatorcontrib><creatorcontrib>Crowe, B</creatorcontrib><creatorcontrib>Danagoulian, S</creatorcontrib><creatorcontrib>Danley, T</creatorcontrib><creatorcontrib>Deconinck, W</creatorcontrib><creatorcontrib>Defurne, M</creatorcontrib><creatorcontrib>Desnault, C</creatorcontrib><creatorcontrib>Di, D</creatorcontrib><creatorcontrib>Dlamini, M</creatorcontrib><creatorcontrib>Duer, M</creatorcontrib><creatorcontrib>Duran, B</creatorcontrib><creatorcontrib>Ent, R</creatorcontrib><creatorcontrib>Fanelli, C</creatorcontrib><creatorcontrib>Fuchey, E</creatorcontrib><creatorcontrib>Gal, C</creatorcontrib><creatorcontrib>Gaskell, D</creatorcontrib><creatorcontrib>Georges, F</creatorcontrib><creatorcontrib>Gilad, S</creatorcontrib><creatorcontrib>Glamazdin, O</creatorcontrib><creatorcontrib>Gnanvo, K</creatorcontrib><creatorcontrib>Gramolin, A V</creatorcontrib><creatorcontrib>Gray, V M</creatorcontrib><creatorcontrib>Gu, C</creatorcontrib><creatorcontrib>Habarakada, A</creatorcontrib><creatorcontrib>Hague, T</creatorcontrib><creatorcontrib>Hamad, G</creatorcontrib><creatorcontrib>Hamilton, D</creatorcontrib><creatorcontrib>Hamilton, K</creatorcontrib><creatorcontrib>Hansen, O</creatorcontrib><creatorcontrib>Hauenstein, F</creatorcontrib><creatorcontrib>Hernandez, A V</creatorcontrib><creatorcontrib>Henry, W</creatorcontrib><creatorcontrib>Higinbotham, D W</creatorcontrib><creatorcontrib>Holmstrom, T</creatorcontrib><creatorcontrib>Horn, T</creatorcontrib><creatorcontrib>Huang, Y</creatorcontrib><creatorcontrib>Huber, G M</creatorcontrib><creatorcontrib>Hyde, C</creatorcontrib><creatorcontrib>Ibrahim, H</creatorcontrib><creatorcontrib>Israel, N</creatorcontrib><creatorcontrib>Jen, C-M</creatorcontrib><creatorcontrib>Jin, K</creatorcontrib><creatorcontrib>Jones, M</creatorcontrib><creatorcontrib>Kabir, A</creatorcontrib><creatorcontrib>Karki, B</creatorcontrib><creatorcontrib>Keppel, C</creatorcontrib><creatorcontrib>Khachatryan, V</creatorcontrib><creatorcontrib>King, P M</creatorcontrib><creatorcontrib>Li, S</creatorcontrib><creatorcontrib>Li, W</creatorcontrib><creatorcontrib>Liu, H</creatorcontrib><creatorcontrib>Liu, J</creatorcontrib><creatorcontrib>Liyanage, A H</creatorcontrib><creatorcontrib>Mack, D</creatorcontrib><creatorcontrib>Magee, J</creatorcontrib><creatorcontrib>Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)</creatorcontrib><creatorcontrib>Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)</creatorcontrib><creatorcontrib>Argonne National Lab. (ANL), Argonne, IL (United States)</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Christy, M E</au><au>Gautam, T</au><au>Ou, L</au><au>Schmookler, B</au><au>Wang, Y</au><au>Adikaram, D</au><au>Ahmed, Z</au><au>Albataineh, H</au><au>Ali, S F</au><au>Aljawrneh, B</au><au>Allada, K</au><au>Allison, S L</au><au>Alsalmi, S</au><au>Androic, D</au><au>Aniol, K</au><au>Annand, J</au><au>Arrington, J</au><au>Atac, H</au><au>Averett, T</au><au>Ayerbe Gayoso, C</au><au>Bai, X</au><au>Bane, J</au><au>Barcus, S</au><au>Bartlett, K</au><au>Bellini, V</au><au>Beminiwattha, R</au><au>Bericic, J</au><au>Bhatt, H</au><au>Bhetuwal, D</au><au>Biswas, D</au><au>Brash, E</au><au>Bulumulla, D</au><au>Camacho, C M</au><au>Campbell, J</au><au>Camsonne, A</au><au>Carmignotto, M</au><au>Castellanos, J</au><au>Chen, C</au><au>Chen, J-P</au><au>Chetry, T</au><au>Cisbani, E</au><au>Clary, B</au><au>Cohen, E</au><au>Compton, N</au><au>Cornejo, J C</au><au>Covrig Dusa, S</au><au>Crowe, B</au><au>Danagoulian, S</au><au>Danley, T</au><au>Deconinck, W</au><au>Defurne, M</au><au>Desnault, C</au><au>Di, D</au><au>Dlamini, M</au><au>Duer, M</au><au>Duran, B</au><au>Ent, R</au><au>Fanelli, C</au><au>Fuchey, E</au><au>Gal, C</au><au>Gaskell, D</au><au>Georges, F</au><au>Gilad, S</au><au>Glamazdin, O</au><au>Gnanvo, K</au><au>Gramolin, A V</au><au>Gray, V M</au><au>Gu, C</au><au>Habarakada, A</au><au>Hague, T</au><au>Hamad, G</au><au>Hamilton, D</au><au>Hamilton, K</au><au>Hansen, O</au><au>Hauenstein, F</au><au>Hernandez, A V</au><au>Henry, W</au><au>Higinbotham, D W</au><au>Holmstrom, T</au><au>Horn, T</au><au>Huang, Y</au><au>Huber, G M</au><au>Hyde, C</au><au>Ibrahim, H</au><au>Israel, N</au><au>Jen, C-M</au><au>Jin, K</au><au>Jones, M</au><au>Kabir, A</au><au>Karki, B</au><au>Keppel, C</au><au>Khachatryan, V</au><au>King, P M</au><au>Li, S</au><au>Li, W</au><au>Liu, H</au><au>Liu, J</au><au>Liyanage, A H</au><au>Mack, D</au><au>Magee, J</au><aucorp>Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)</aucorp><aucorp>Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)</aucorp><aucorp>Argonne National Lab. (ANL), Argonne, IL (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2022-03-11</date><risdate>2022</risdate><volume>128</volume><issue>10</issue><spage>102002</spage><epage>102002</epage><pages>102002-102002</pages><artnum>102002</artnum><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75 (GeV/c)^{2}. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q^{2} and double the range over which a longitudinal or transverse separation of the cross section can be performed. The difference between our results and polarization data agrees with that observed at lower Q^{2} and attributed to hard two-photon exchange (TPE) effects, extending to 8 (GeV/c)^{2} the range of Q^{2} for which a discrepancy is established at >95% confidence. We use the discrepancy to quantify the size of TPE contributions needed to explain the cross section at high Q^{2}.</abstract><cop>United States</cop><pub>American Physical Society</pub><pmid>35333083</pmid><doi>10.1103/PhysRevLett.128.102002</doi><tpages>1</tpages><orcidid>https://orcid.org/0000-0003-4990-3369</orcidid><orcidid>https://orcid.org/0000-0003-0976-0228</orcidid><orcidid>https://orcid.org/0000-0001-5913-0596</orcidid><orcidid>https://orcid.org/0000-0003-2300-2626</orcidid><orcidid>https://orcid.org/0000-0002-8945-5305</orcidid><orcidid>https://orcid.org/0000-0001-6069-3409</orcidid><orcidid>https://orcid.org/0000-0002-6278-1178</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 2022-03, Vol.128 (10), p.102002-102002, Article 102002 |
| issn | 0031-9007 1079-7114 |
| language | eng |
| recordid | cdi_osti_scitechconnect_1854551 |
| source | American Physical Society Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | form factors High Energy Physics - Experiment Nuclear Experiment Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS quark model strong interaction |
| title | Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-08T02%3A07%3A40IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Form%20Factors%20and%20Two-Photon%20Exchange%20in%20High-Energy%20Elastic%20Electron-Proton%20Scattering&rft.jtitle=Physical%20review%20letters&rft.au=Christy,%20M%20E&rft.aucorp=Lawrence%20Berkeley%20National%20Lab.%20(LBNL),%20Berkeley,%20CA%20(United%20States)&rft.date=2022-03-11&rft.volume=128&rft.issue=10&rft.spage=102002&rft.epage=102002&rft.pages=102002-102002&rft.artnum=102002&rft.issn=0031-9007&rft.eissn=1079-7114&rft_id=info:doi/10.1103/PhysRevLett.128.102002&rft_dat=%3Cproquest_osti_%3E2644010404%3C/proquest_osti_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2644010404&rft_id=info:pmid/35333083&rfr_iscdi=true |