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  1. Article ; Online: Measurement of the Nucleon F_{2}^{n}/F_{2}^{p} Structure Function Ratio by the Jefferson Lab MARATHON Tritium/Helium-3 Deep Inelastic Scattering Experiment.

    Abrams, D / Albataineh, H / Aljawrneh, B S / Alsalmi, S / Androic, D / Aniol, K / Armstrong, W / Arrington, J / Atac, H / Averett, T / Gayoso, C Ayerbe / Bai, X / Bane, J / Barcus, S / Beck, A / Bellini, V / Bhatt, H / Bhetuwal, D / Biswas, D /
    Blyth, D / Boeglin, W / Bulumulla, D / Butler, J / Camsonne, A / Carmignotto, M / Castellanos, J / Chen, J-P / Cohen, E O / Covrig, S / Craycraft, K / Cruz-Torres, R / Dongwi, B / Duran, B / Dutta, D / Fuchey, E / Gal, C / Gautam, T N / Gilad, S / Gnanvo, K / Gogami, T / Gomez, J / Gu, C / Habarakada, A / Hague, T / Hansen, J-O / Hattawy, M / Hauenstein, F / Higinbotham, D W / Holt, R J / Hughes, E W / Hyde, C / Ibrahim, H / Jian, S / Joosten, S / Karki, A / Karki, B / Katramatou, A T / Keith, C / Keppel, C / Khachatryan, M / Khachatryan, V / Khanal, A / Kievsky, A / King, D / King, P M / Korover, I / Kulagin, S A / Kumar, K S / Kutz, T / Lashley-Colthirst, N / Li, S / Li, W / Liu, H / Liuti, S / Liyanage, N / Markowitz, P / McClellan, R E / Meekins, D / Beck, S Mey-Tal / Meziani, Z-E / Michaels, R / Mihovilovic, M / Nelyubin, V / Nguyen, D / Nuruzzaman / Nycz, M / Obrecht, R / Olson, M / Owen, V F / Pace, E / Pandey, B / Pandey, V / Paolone, M / Papadopoulou, A / Park, S / Paul, S / Petratos, G G / Petti, R / Piasetzky, E / Pomatsalyuk, R / Premathilake, S / Puckett, A J R / Punjabi, V / Ransome, R D / Rashad, M N H / Reimer, P E / Riordan, S / Roche, J / Salmè, G / Santiesteban, N / Sawatzky, B / Scopetta, S / Schmidt, A / Schmookler, B / Segal, J / Segarra, E P / Shahinyan, A / Širca, S / Sparveris, N / Su, T / Suleiman, R / Szumila-Vance, H / Tadepalli, A S / Tang, L / Tireman, W / Tortorici, F / Urciuoli, G M / Wojtsekhowski, B / Wood, S / Ye, Z H / Ye, Z Y / Zhang, J

    Physical review letters

    2022  Volume 128, Issue 13, Page(s) 132003

    Abstract: The ratio of the nucleon F_{2} structure functions, F_{2}^{n}/F_{2}^{p}, is determined by the MARATHON experiment from measurements of deep inelastic scattering of electrons from ^{3}H and ^{3}He nuclei. The experiment was performed in the Hall A ... ...

    Abstract The ratio of the nucleon F_{2} structure functions, F_{2}^{n}/F_{2}^{p}, is determined by the MARATHON experiment from measurements of deep inelastic scattering of electrons from ^{3}H and ^{3}He nuclei. The experiment was performed in the Hall A Facility of Jefferson Lab using two high-resolution spectrometers for electron detection, and a cryogenic target system which included a low-activity tritium cell. The data analysis used a novel technique exploiting the mirror symmetry of the two nuclei, which essentially eliminates many theoretical uncertainties in the extraction of the ratio. The results, which cover the Bjorken scaling variable range 0.19<x<0.83, represent a significant improvement compared to previous SLAC and Jefferson Lab measurements for the ratio. They are compared to recent theoretical calculations and empirical determinations of the F_{2}^{n}/F_{2}^{p} ratio.<br />
    Language English
    Publishing date 2022-04-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.132003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Deeply Virtual Compton Scattering Cross Section at High Bjorken x_{B}.

    Georges, F / Rashad, M N H / Stefanko, A / Dlamini, M / Karki, B / Ali, S F / Lin, P-J / Ko, H-S / Israel, N / Adikaram, D / Ahmed, Z / Albataineh, H / Aljawrneh, B / Allada, K / Allison, S / Alsalmi, S / Androic, D / Aniol, K / Annand, J /
    Atac, H / Averett, T / Ayerbe Gayoso, C / Bai, X / Bane, J / Barcus, S / Bartlett, K / Bellini, V / Beminiwattha, R / Bericic, J / Biswas, D / Brash, E / Bulumulla, D / Campbell, J / Camsonne, A / Carmignotto, M / Castellano, J / Chen, C / Chen, J-P / Chetry, T / Christy, M E / Cisbani, E / Clary, B / Cohen, E / Compton, N / Cornejo, J C / Covrig Dusa, S / Crowe, B / Danagoulian, S / Danley, T / De Persio, F / Deconinck, W / Defurne, M / Desnault, C / Di, D / Duer, M / Duran, B / Ent, R / Fanelli, C / Franklin, G / Fuchey, E / Gal, C / Gaskell, D / Gautam, T / Glamazdin, O / Gnanvo, K / Gray, V M / Gu, C / Hague, T / Hamad, G / Hamilton, D / Hamilton, K / Hansen, O / Hauenstein, F / Henry, W / Higinbotham, D W / Holmstrom, T / Horn, T / Huang, Y / Huber, G M / Hyde, C E / Ibrahim, H / Jen, C-M / Jin, K / Jones, M / Kabir, A / Keppel, C / Khachatryan, V / King, P M / Li, S / Li, W B / Liu, J / Liu, H / Liyanage, A / Magee, J / Malace, S / Mammei, J / Markowitz, P / McClellan, E / Mazouz, M / Meddi, F / Meekins, D / Mesik, K / Michaels, R / Mkrtchyan, A / Montgomery, R / Muñoz Camacho, C / Myers, L S / Nadel-Turonski, P / Nazeer, S J / Nelyubin, V / Nguyen, D / Nuruzzaman, N / Nycz, M / Obretch, O F / Ou, L / Palatchi, C / Pandey, B / Park, S / Park, K / Peng, C / Pomatsalyuk, R / Pooser, E / Puckett, A J R / Punjabi, V / Quinn, B / Rahman, S / Reimer, P E / Roche, J / Sapkota, I / Sarty, A / Sawatzky, B / Saylor, N H / Schmookler, B / Shabestari, M H / Shahinyan, A / Sirca, S / Smith, G R / Sooriyaarachchilage, S / Sparveris, N / Spies, R / Su, T / Subedi, A / Sulkosky, V / Sun, A / Thorne, L / Tian, Y / Ton, N / Tortorici, F / Trotta, R / Urciuoli, G M / Voutier, E / Waidyawansa, B / Wang, Y / Wojtsekhowski, B / Wood, S / Yan, X / Ye, L / Ye, Z / Yero, C / Zhang, J / Zhao, Y / Zhu, P

    Physical review letters

    2022  Volume 128, Issue 25, Page(s) 252002

    Abstract: We report high-precision measurements of the deeply virtual Compton scattering (DVCS) cross section at high values of the Bjorken variable x_{B}. DVCS is sensitive to the generalized parton distributions of the nucleon, which provide a three-dimensional ... ...

    Abstract We report high-precision measurements of the deeply virtual Compton scattering (DVCS) cross section at high values of the Bjorken variable x_{B}. DVCS is sensitive to the generalized parton distributions of the nucleon, which provide a three-dimensional description of its internal constituents. Using the exact analytic expression of the DVCS cross section for all possible polarization states of the initial and final electron and nucleon, and final state photon, we present the first experimental extraction of all four helicity-conserving Compton form factors (CFFs) of the nucleon as a function of x_{B}, while systematically including helicity flip amplitudes. In particular, the high accuracy of the present data demonstrates sensitivity to some very poorly known CFFs.
    Language English
    Publishing date 2022-07-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.252002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Deep Exclusive Electroproduction of π^{0} at High Q^{2} in the Quark Valence Regime.

    Dlamini, M / Karki, B / Ali, S F / Lin, P-J / Georges, F / Ko, H-S / Israel, N / Rashad, M N H / Stefanko, A / Adikaram, D / Ahmed, Z / Albataineh, H / Aljawrneh, B / Allada, K / Allison, S / Alsalmi, S / Androic, D / Aniol, K / Annand, J /
    Atac, H / Averett, T / Ayerbe Gayoso, C / Bai, X / Bane, J / Barcus, S / Bartlett, K / Bellini, V / Beminiwattha, R / Bericic, J / Biswas, D / Brash, E / Bulumulla, D / Campbell, J / Camsonne, A / Carmignotto, M / Castellano, J / Chen, C / Chen, J-P / Chetry, T / Christy, M E / Cisbani, E / Clary, B / Cohen, E / Compton, N / Cornejo, J C / Covrig Dusa, S / Crowe, B / Danagoulian, S / Danley, T / De Persio, F / Deconinck, W / Defurne, M / Desnault, C / Di, D / Duer, M / Duran, B / Ent, R / Fanelli, C / Franklin, G / Fuchey, E / Gal, C / Gaskell, D / Gautam, T / Glamazdin, O / Gnanvo, K / Gray, V M / Gu, C / Hague, T / Hamad, G / Hamilton, D / Hamilton, K / Hansen, O / Hauenstein, F / Henry, W / Higinbotham, D W / Holmstrom, T / Horn, T / Huang, Y / Huber, G M / Hyde, C / Ibrahim, H / Jen, C-M / Jin, K / Jones, M / Kabir, A / Keppel, C / Khachatryan, V / King, P M / Li, S / Li, W / Liu, J / Liu, H / Liyanage, A / Magee, J / Malace, S / Mammei, J / Markowitz, P / McClellan, E / Meddi, F / Meekins, D / Mesik, K / Michaels, R / Mkrtchyan, A / Montgomery, R / Muñoz Camacho, C / Myers, L S / Nadel-Turonski, P / Nazeer, S J / Nelyubin, V / Nguyen, D / Nuruzzaman, N / Nycz, M / Obretch, O F / Ou, L / Palatchi, C / Pandey, B / Park, S / Park, K / Peng, C / Pomatsalyuk, R / Pooser, E / Puckett, A J R / Punjabi, V / Quinn, B / Rahman, S / Reimer, P E / Roche, J / Sapkota, I / Sarty, A / Sawatzky, B / Saylor, N H / Schmookler, B / Shabestari, M H / Shahinyan, A / Sirca, S / Smith, G R / Sooriyaarachchilage, S / Sparveris, N / Spies, R / Su, T / Subedi, A / Sulkosky, V / Sun, A / Thorne, L / Tian, Y / Ton, N / Tortorici, F / Trotta, R / Urciuoli, G M / Voutier, E / Waidyawansa, B / Wang, Y / Wojtsekhowski, B / Wood, S / Yan, X / Ye, L / Ye, Z / Yero, C / Zhang, J / Zhao, Y / Zhu, P

    Physical review letters

    2021  Volume 127, Issue 15, Page(s) 152301

    Abstract: We report measurements of the exclusive neutral pion electroproduction cross section off protons at large values of x_{B} (0.36, 0.48, and 0.60) and Q^{2} (3.1 to 8.4  GeV^{2}) obtained from Jefferson Lab Hall A experiment E12-06-014. The corresponding ... ...

    Abstract We report measurements of the exclusive neutral pion electroproduction cross section off protons at large values of x_{B} (0.36, 0.48, and 0.60) and Q^{2} (3.1 to 8.4  GeV^{2}) obtained from Jefferson Lab Hall A experiment E12-06-014. The corresponding structure functions dσ_{T}/dt+εdσ_{L}/dt, dσ_{TT}/dt, dσ_{LT}/dt, and dσ_{LT^{'}}/dt are extracted as a function of the proton momentum transfer t-t_{min}. The results suggest the amplitude for transversely polarized virtual photons continues to dominate the cross section throughout this kinematic range. The data are well described by calculations based on transversity generalized parton distributions coupled to a helicity flip distribution amplitude of the pion, thus providing a unique way to probe the structure of the nucleon.
    Language English
    Publishing date 2021-10-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.127.152301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  4. Article ; Online: Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering.

    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 / Malace, S / Mammei, J / Markowitz, P / Mayilyan, S / McClellan, E / Meddi, F / Meekins, D / Mesick, K / Michaels, R / Mkrtchyan, A / Moffit, B / Montgomery, R / Myers, L S / Nadel-Turonski, P / Nazeer, S J / Nelyubin, V / Nguyen, D / Nuruzzaman, N / Nycz, M / Obrecht, R F / Ohanyan, K / Palatchi, C / Pandey, B / Park, K / Park, S / Peng, C / Persio, F D / Pomatsalyuk, R / Pooser, E / Puckett, A J R / Punjabi, V / Quinn, B / Rahman, S / Rashad, M N H / Reimer, P E / Riordan, S / Roche, J / Sapkota, I / Sarty, A / Sawatzky, B / Saylor, N H / Shabestari, M H / Shahinyan, A / Širca, S / Smith, G R / Sooriyaarachchilage, S / Sparveris, N / Spies, R / Stefanko, A / Su, T / Subedi, A / Sulkosky, V / Sun, A / Tan, Y / Thorne, L / Ton, N / Tortorici, F / Trotta, R / Uniyal, R / Urciuoli, G M / Voutier, E / Waidyawansa, B / Wojtsekhowski, B / Wood, S / Yan, X / Ye, L / Ye, Z H / Yero, C / Zhang, J / Zhao, Y X / Zhu, P

    Physical review letters

    2021  Volume 128, Issue 10, Page(s) 102002

    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 ... ...

    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}.
    Language English
    Publishing date 2021-06-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.102002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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