Author: "Moffit B" - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Moffit B"' showing total 254 results

Start Over Author "Moffit B"

254 results on '"Moffit B"'

1. Strong interaction physics at the luminosity frontier with 22 GeV electrons at Jefferson Lab

Author: Accardi, A., Achenbach, P., Adhikari, D., Afanasev, A., Akondi, C. S., Akopov, N., Albaladejo, M., Albataineh, H., Albrecht, M., Almeida-Zamora, B., Amaryan, M., Androić, D., Armstrong, W., Armstrong, D. S., Arratia, M., Arrington, J., Asaturyan, A., Austregesilo, A., Avakian, H., Averett, T., Gayoso, C. Ayerbe, Bacchetta, A., Balantekin, A. B., Baltzell, N., Barion, L., Barry, P. C., Bashir, A., Battaglieri, M., Bellini, V., Belov, I., Benhar, O., Benkel, B., Benmokhtar, F., Bentz, W., Bertone, V., Bhatt, H., Bianconi, A., Bibrzycki, L., Bijker, R., Binosi, D., Biswas, D., Boër, M., Boeglin, W., Bogacz, S. A., Boglione, M., Bondí, M., Boos, E. E., Bosted, P., Bozzi, G., Brash, E. J., Briceño, R. A., Brindza, P. D., Briscoe, W. J., Brodsky, S. J., Brooks, W. K., Burkert, V. D., Camsonne, A., Cao, T., Cardman, L. S., Carman, D. S., Carpinelli, M., Cates, G. D., Caylor, J., Celentano, A., Celiberto, F. G., Cerutti, M., Chang, L., Chatagnon, P., Chen, C., Chen, J.-P., Chetry, T., Christopher, A., Christy, E., Chudakov, E., Cisbani, E., Cloët, I. C., Cobos-Martinez, J. J., Cohen, E. O., Colangelo, P., Cole, P. L., Constantinou, M., Contalbrigo, M., Costantini, G., Cosyn, W., Cotton, C., Courtoy, A., Dusa, S. Covrig, Crede, V., Cui, Z.-F., D’Angelo, A., Döring, M., Dalton, M. M., Danilkin, I., Davydov, M., Day, D., De Fazio, F., De Napoli, M., De Vita, R., Dean, D. J., Defurne, M., de Paula, W., de Téramond, G. F., Deur, A., Devkota, B., Dhital, S., Di Nezza, P., Diefenthaler, M., Diehl, S., Dilks, C., Ding, M., Djalali, C., Dobbs, S., Dupré, R., Dutta, D., Edwards, R. G., Egiyan, H., Ehinger, L., Eichmann, G., Elaasar, M., Elouadrhiri, L., Alaoui, A. El, Fassi, L. El, Emmert, A., Engelhardt, M., Ent, R., Ernst, D. J., Eugenio, P., Evans, G., Fanelli, C., Fegan, S., Fernández-Ramírez, C., Fernandez, L. A., Fernando, I. P., Filippi, A., Fischer, C. S., Fogler, C., Fomin, N., Frankfurt, L., Frederico, T., Freese, A., Fu, Y., Gamberg, L., Gan, L., Gao, F., Garcia-Tecocoatzi, H., Gaskell, D., Gasparian, A., Gates, K., Gavalian, G., Ghoshal, P. K., Giachino, A., Giacosa, F., Giannuzzi, F., Gilfoyle, G.-P., Girod, F.-X., Glazier, D. I., Gleason, C., Godfrey, S., Goity, J. L., Golubenko, A. A., Gonzàlez-Solís, S., Gothe, R. W., Gotra, Y., Griffioen, K., Grocholski, O., Grube, B., Guèye, P., Guo, F.-K., Guo, Y., Guo, L., Hague, T. J., Hammoud, N., Hansen, J.-O., Hattawy, M., Hauenstein, F., Hayward, T., Heddle, D., Heinrich, N., Hen, O., Higinbotham, D. W., Higuera-Angulo, I. M., Hiller Blin, A. N., Hobart, A., Hobbs, T., Holmberg, D. E., Horn, T., Hoyer, P., Huber, G. M., Hurck, P., Hutauruk, P. T. P., Ilieva, Y., Illari, I., Ireland, D. G., Isupov, E. L., Italiano, A., Jaegle, I., Jarvis, N. S., Jenkins, D. J., Jeschonnek, S., Ji, C.-R., Jo, H. S., Jones, M., Jones, R. T., Jones, D. C., Joo, K., Junaid, M., Kageya, T., Kalantarians, N., Karki, A., Karyan, G., Katramatou, A. T., Kay, S. J. D., Kazimi, R., Keith, C. D., Keppel, C., Kerbizi, A., Khachatryan, V., Khanal, A., Khandaker, M., Kim, A., Kinney, E. R., Kohl, M., Kotzinian, A., Kriesten, B. T., Kubarovsky, V., Kubis, B., Kuhn, S. E., Kumar, V., Kutz, T., Leali, M., Lebed, R. F., Lenisa, P., Leskovec, L., Li, S., Li, X., Liao, J., Lin, H.-W., Liu, L., Liuti, S., Liyanage, N., Lu, Y., MacGregor, I. J. D., Mack, D. J., Maiani, L., Mamo, K. A., Mandaglio, G., Mariani, C., Markowitz, P., Marukyan, H., Mascagna, V., Mathieu, V., Maxwell, J., Mazouz, M., McCaughan, M., McKeown, R. D., McKinnon, B., Meekins, D., Melnitchouk, W., Metz, A., Meyer, C. A., Meziani, Z.-E., Mezrag, C., Michaels, R., Miller, G. A., Mineeva, T., Miramontes, A. S., Mirazita, M., Mizutani, K., Mkrtchyan, A., Mkrtchyan, H., Moffit, B., Mohanmurthy, P., Mokeev, V. I., Monaghan, P., Montaña, G., Montgomery, R., Moretti, A., Chàvez, J. M. Morgado, Mosel, U., Movsisyan, A., Musico, P., Nadeeshani, S. A., Nadolsky, P. M., Nakamura, S. X., Nazeer, J., Nefediev, A. V., Neupane, K., Nguyen, D., Niccolai, S., Niculescu, I., Niculescu, G., Nocera, E. R., Nycz, M., Olness, F. I., Ortega, P. G., Osipenko, M., Pace, E., Pandey, B., Pandey, P., Papandreou, Z., Papavassiliou, J., Pappalardo, L. L., Paredes-Torres, G., Paremuzyan, R., Park, S., Parsamyan, B., Paschke, K. D., Pasquini, B., Passemar, E., Pasyuk, E., Patel, T., Paudel, C., Paul, S. J., Peng, J.-C., Pentchev, L., Perrino, R., Perry, R. J., Peters, K., Petratos, G. G., Phelps, W., Piasetzky, E., Pilloni, A., Pire, B., Pitonyak, D., Pitt, M. L., Polosa, A. D., Pospelov, M., Postuma, A. C., Poudel, J., Preet, L., Prelovsek, S., Price, J. W., Prokudin, A., Puckett, A. J. R., Pybus, J. R., Qin, S.-X., Qiu, J.-W., Radici, M., Rashidi, H., Rathnayake, A. D., Raue, B. A., Reed, T., Reimer, P. E., Reinhold, J., Richard, J.-M., Rinaldi, M., Ringer, F., Ripani, M., Ritman, J., West, J. Rittenhouse, Rivero-Acosta, A., Roberts, C. D., Rodas, A., Rodini, S., Rodríguez-Quintero, J., Rogers, T. C., Rojo, J., Rossi, P., Rossi, G. C., Salmè, G., Santiesteban, S. N., Santopinto, E., Sargsian, M., Sato, N., Schadmand, S., Schmidt, A., Schmidt, S. M., Schnell, G., Schumacher, R. A., Schweitzer, P., Scimemi, I., Scott, K. C., Seay, D. A., Segovia, J., Semenov-Tian-Shansky, K., Seryi, A., Sharda, A. S., Shepherd, M. R., Shirokov, E. V., Shrestha, S., Shrestha, U., Shvedunov, V. I., Signori, A., Slifer, K. J., Smith, W. A., Somov, A., Souder, P., Sparveris, N., Spizzo, F., Spreafico, M., Stepanyan, S., Stevens, J. R., Strakovsky, I. I., Strauch, S., Strikman, M., Su, S., Sumner, B. C. L., Sun, E., Suresh, M., Sutera, C., Swanson, E. S., Szczepaniak, A. P., Sznajder, P., Szumila-Vance, H., Szymanowski, L., Tadepalli, A.-S., Tadevosyan, V., Tamang, B., Tarasov, V. V., Thiel, A., Tong, X.-B., Tyson, R., Ungaro, M., Urciuoli, G. M., Usman, A., Valcarce, A., Vallarino, S., Vaquera-Araujo, C. A., Venturelli, L., Vera, F., Vladimirov, A., Vossen, A., Wagner, J., Wei, X., Weinstein, L. B., Weiss, C., Williams, R., Winney, D., Wojtsekhowski, B., Wood, M. H., Xiao, T., Xu, S.-S., Ye, Z., Yero, C., Yuan, C.-P., Yurov, M., Zachariou, N., Zhang, Z., Zhao, Y., Zhao, Z. W., Zheng, X., Zhou, X., Ziegler, V., and Zihlmann, B.
Published: 2024
Full Text: View/download PDF

2. Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab

Author: Accardi, A., Achenbach, P., Adhikari, D., Afanasev, A., Akondi, C. S., Akopov, N., Albaladejo, M., Albataineh, H., Albrecht, M., Almeida-Zamora, B., Amaryan, M., Androić, D., Armstrong, W., Armstrong, D. S., Arratia, M., Arrington, J., Asaturyan, A., Austregesilo, A., Avagyan, H., Averett, T., Gayoso, C. Ayerbe, Bacchetta, A., Balantekin, A. B., Baltzell, N., Barion, L., Barry, P. C., Bashir, A., Battaglieri, M., Bellini, V., Belov, I., Benhar, O., Benkel, B., Benmokhtar, F, Bentz, W., Bertone, V., Bhatt, H., Bianconi, A., Bibrzycki, L., Bijker, R., Binosi, D., Biswas, D., Boër, M., Boeglin, W., Bogacz, S. A., Boglione, M., Bondí, M., Boos, E. E., Bosted, P., Bozzi, G., Brash, E. J., Briceño, R. A., Brindza, P. D., Briscoe, W. J., Brodsky, S. J, Brooks, W. K., Burkert, V. D., Camsonne, A., Cao, T., Cardman, L. S., Carman, D. S., Carpinelli, M, Cates, G. D., Caylor, J., Celentano, A., Celiberto, F. G., Cerutti, M., Chang, Lei, Chatagnon, P., Chen, C., Chen, J-P, Chetry, T., Christopher, A., Christy, E., Chudakov, E., Cisbani, E., Cloët, I. C., Cobos-Martinez, J. J., Cohen, E. O., Colangelo, P., Cole, P. L., Constantinou, M., Contalbrigo, M., Costantini, G., Cosyn, W., Cotton, C., Courtoy, A., Dusa, S. Covrig, Crede, V., Cui, Z. -F., D'Angelo, A., Döring, M., Dalton, M. M., Danilkin, I., Davydov, M., Day, D., De Fazio, F., De Napoli, M., De Vita, R., Dean, D. J., Defurne, M., Deur, A., Devkota, B., Dhital, S., Di Nezza, P., Diefenthaler, M., Diehl, S., Dilks, C., Ding, M., Djalali, C., Dobbs, S., Dupré, R., Dutta, D., Edwards, R. G., Egiyan, H., Ehinger, L., Eichmann, G., Elaasar, M., Elouadrhiri, L., Alaoui, A. El, Fassi, L. El, Emmert, A., Engelhardt, M., Ent, R., Ernst, D. J, Eugenio, P., Evans, G., Fanelli, C., Fegan, S., Fernández-Ramírez, C., Fernandez, L. A., Fernando, I. P., Filippi, A., Fischer, C. S., Fogler, C., Fomin, N., Frankfurt, L., Frederico, T., Freese, A., Fu, Y., Gamberg, L., Gan, L., Gao, F., Garcia-Tecocoatzi, H., Gaskell, D., Gasparian, A., Gates, K, Gavalian, G., Ghoshal, P. K., Giachino, A., Giacosa, F., Giannuzzi, F., Gilfoyle, G. -P., Girod, F-X, Glazier, D. I., Gleason, C., Godfrey, S., Goity, J. L., Golubenko, A. A., Gonzàlez-Solís, S., Gothe, R. W., Gotra, Y., Griffioen, K., Grocholski, O., Grube, B., Guèye, P., Guo, F. -K., Guo, Y., Guo, L., Hague, T. J., Hammoud, N., Hansen, J. -O., Hattawy, M., Hauenstein, F., Hayward, T., Heddle, D., Heinrich, N., Hen, O., Higinbotham, D. W., Higuera-Angulo, I. M., Blin, A. N. Hiller, Hobart, A., Hobbs, T., Holmberg, D. E, Horn, T., Hoyer, P., Huber, G. M., Hurck, P., Hutauruk, P. T. P., Ilieva, Y., Illari, I., Ireland, D. G, Isupov, E. L., Italiano, A., Jaegle, I., Jarvis, N. S., Jenkins, DJ, Jeschonnek, S., Ji, C-R., Jo, H. S., Jones, M., Jones, R. T., Jones, D. C., Joo, K., Junaid, M., Kageya, T., Kalantarians, N., Karki, A., Karyan, G., Katramatou, A. T., Kay, S. J. D, Kazimi, R., Keith, C. D., Keppel, C., Kerbizi, A., Khachatryan, V., Khanal, A., Khandaker, M., Kim, A., Kinney, E. R., Kohl, M., Kotzinian, A., Kriesten, B. T., Kubarovsky, V., Kubis, B., Kuhn, S. E., Kumar, V., Kutz, T., Leali, M., Lebed, R. F., Lenisa, P., Leskovec, L., Li, S., Li, X., Liao, J., Lin, H. -W., Liu, L., Liuti, S., Liyanage, N., Lu, Y., MacGregor, I. J. D., Mack, D. J., Maiani, L, Mamo, K. A., Mandaglio, G., Mariani, C., Markowitz, P., Marukyan, H., Mascagna, V., Mathieu, V., Maxwell, J., Mazouz, M., McCaughan, M., McKeown, R. D., McKinnon, B., Meekins, D., Melnitchouk, W., Metz, A., Meyer, C. A., Meziani, Z. -E., Mezrag, C., Michaels, R., Miller, G. A., Mineeva, T., Miramontes, A. S., Mirazita, M., Mizutani, K., Mkrtchyan, H., Mkrtchyan, A., Moffit, B., Mohanmurthy, P., Mokeev, V. I., Monaghan, P., Montaña, G., Montgomery, R., Moretti, A., Chàvez, J. M. Morgado, Mosel, U., Movsisyan, A., Musico, P., Nadeeshani, S. A, Nadolsky, P. M., Nakamura, S. X., Nazeer, J., Nefediev, A. V., Neupane, K., Nguyen, D., Niccolai, S., Niculescu, I., Niculescu, G., Nocera, E. R., Nycz, M., Olness, F. I., Ortega, P. G., Osipenko, M., Pace, E., Pandey, B, Pandey, P., Papandreou, Z., Papavassiliou, J., Pappalardo, L. L., Paredes-Torres, G., Paremuzyan, R., Park, S., Parsamyan, B., Paschke, K. D., Pasquini, B., Passemar, E., Pasyuk, E., Patel, T., Paudel, C., Paul, S. J., Peng, J-C., Pentchev, L., Perrino, R., Perry, R. J., Peters, K., Petratos, G. G., Phelps, W., Piasetzky, E., Pilloni, A., Pire, B., Pitonyak, D., Pitt, M. L., Polosa, A. D., Pospelov, M., Postuma, A. C., Poudel, J., Preet, L., Prelovsek, S., Price, J. W., Prokudin, A., Puckett, A. J. R., Pybus, J. R., Qin, S. -X., Qiu, J. -W., Radici, M., Rashidi, H., Rathnayake, A. D, Raue, B. A., Reed, T., Reimer, P. E., Reinhold, J., Richard, J. -M., Rinaldi, M., Ringer, F., Ripani, M., Ritman, J., West, J. Rittenhouse, Rivero-Acosta, A., Roberts, C. D., Rodas, A., Rodini, S., Rodríguez-Quintero, J., Rogers, T. C., Rojo, J., Rossi, P., Rossi, G. C., Salmè, G., Santiesteban, S. N., Santopinto, E., Sargsian, M., Sato, N., Schadmand, S., Schmidt, A., Schmidt, S. M, Schnell, G., Schumacher, R. A., Schweitzer, P., Scimemi, I., Scott, K. C, Seay, D. A, Segovia, J., Semenov-Tian-Shansky, K., Seryi, A., Sharda, A. S, Shepherd, M. R., Shirokov, E. V., Shrestha, S., Shrestha, U., Shvedunov, V. I., Signori, A., Slifer, K. J., Smith, W. A., Somov, A., Souder, P., Sparveris, N., Spizzo, F., Spreafico, M., Stepanyan, S., Stevens, J. R., Strakovsky, I. I., Strauch, S., Strikman, M., Su, S., Sumner, B. C. L., Sun, E., Suresh, M., Sutera, C., Swanson, E. S., Szczepaniak, A. P, Sznajder, P., Szumila-Vance, H., Szymanowski, L., Tadepalli, A. -S., Tadevosyan, V., Tamang, B., Tarasov, V. V., Thiel, A., Tong, X. -B., Tyson, R., Ungaro, M., Urciuoli, G. M., Usman, A., Valcarce, A., Vallarino, S., Vaquera-Araujo, C. A., Venturelli, L., Vera, F., Vladimirov, A., Vossen, A., Wagner, J., Wei, X., Weinstein, L. B., Weiss, C., Williams, R., Winney, D., Wojtsekhowski, B., Wood, M. H., Xiao, T., Xu, S. -S., Ye, Z., Yero, C., Yuan, C. -P., Yurov, M., Zachariou, N., Zhang, Z., Zhao, Z. W., Zhao, Y., Zheng, X., Zhou, X., Ziegler, V., Zihlmann, B., de Paula, W, and de Téramond, G. F.
Subjects: Nuclear Experiment, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear Theory
Abstract: This document presents the initial scientific case for upgrading the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab (JLab) to 22 GeV. It is the result of a community effort, incorporating insights from a series of workshops conducted between March 2022 and April 2023. With a track record of over 25 years in delivering the world's most intense and precise multi-GeV electron beams, CEBAF's potential for a higher energy upgrade presents a unique opportunity for an innovative nuclear physics program, which seamlessly integrates a rich historical background with a promising future. The proposed physics program encompass a diverse range of investigations centered around the nonperturbative dynamics inherent in hadron structure and the exploration of strongly interacting systems. It builds upon the exceptional capabilities of CEBAF in high-luminosity operations, the availability of existing or planned Hall equipment, and recent advancements in accelerator technology. The proposed program cover various scientific topics, including Hadron Spectroscopy, Partonic Structure and Spin, Hadronization and Transverse Momentum, Spatial Structure, Mechanical Properties, Form Factors and Emergent Hadron Mass, Hadron-Quark Transition, and Nuclear Dynamics at Extreme Conditions, as well as QCD Confinement and Fundamental Symmetries. Each topic highlights the key measurements achievable at a 22 GeV CEBAF accelerator. Furthermore, this document outlines the significant physics outcomes and unique aspects of these programs that distinguish them from other existing or planned facilities. In summary, this document provides an exciting rationale for the energy upgrade of CEBAF to 22 GeV, outlining the transformative scientific potential that lies within reach, and the remarkable opportunities it offers for advancing our understanding of hadron physics and related fundamental phenomena., Comment: Updates to the list of authors; Preprint number changed from theory to experiment; Updates to sections 4 and 6, including additional figures
Published: 2023

3. A Compton transmission polarimeter for DC and SRF electron photo-injectors

Author: Blume, G., Bruker, M., Cuevas, C., Dong, H., Fernandes Neres, Benjamin, Ghoshal, P., Gopinath, S., Grames, J., Gregory, S., Hays, G., Galliard, C. Le, Marsillac, S., Moffit, B., Nguyen Trung, Thi, Poelker, M., Suleiman, R., Voutier, E., and Zhang, S.
Published: 2024
Full Text: View/download PDF

4. Measurement of the generalized spin polarizabilities of the neutron in the low $Q^2$ region

Author: Sulkosky, V., Peng, C., Chen, J. -P., Deur, A., Abrahamyan, S., Aniol, K. A., Armstrong, D. S., Averett, T., Bailey, S. L., Beck, A., Bertin, P., Butaru, F., Boeglin, W., Camsonne, A., Cates, G. D., Chang, C. C., Choi, Seonho, Chudakov, E., Coman, L., Cornejo, J. C, Craver, B., Cusanno, F., De Leo, R., de Jager, C. W., Denton, J. D., Dhamija, S., Feuerbach, R., Finn, J. M., Frullani, S., Fuoti, K., Gao, H., Garibaldi, F., Gayou, O., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Hansen, J. -O., Hayes, D., Hersman, B., Higinbotham, D. W., Holmstrom, T., Humensky, T. B., Hyde, C. E., Ibrahim, H., Iodice, M., Jiang, X., Kaufman, L. J., Kelleher, A., Keister, K. E., Kim, W., Kolarkar, A., Kolb, N., Korsch, W., Kramer, K., Kumbartzki, G., Lagamba, L., Laine, V., Laveissiere, G., Lerose, J. J., Lhuillier, D., Lindgren, R., Liyanage, N., Lu, H. -J., Ma, B., Margaziotis, D. J., Markowitz, P., McCormick, K., Meziane, M., Meziani, Z. -E., Michaels, R., Moffit, B., Monaghan, P., Nanda, S., Niedziela, J., Niskin, M., Pandolfi, R., Paschke, K. D., Potokar, M., Puckett, A., Punjabi, V. A., Qiang, Y., Ransome, R., Reitz, B., Roche, R., Saha, A., Shabetai, A., Sirca, S., Singh, J. T., Slifer, K., Snyder, R., Solvignon, P., Stringer, R., Subedi, R., Tobias, W. A., Ton, N., Ulmer, P. E., Urciuoli, G. M., Vacheret, A., Voutier, E., Wang, K., Wan, L., Wojtsekhowski, B., Woo, S., Yao, H., Yuan, J., Zhan, X., Zheng, X., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: Understanding the nucleon spin structure in the regime where the strong interaction becomes truly strong poses a challenge to both experiment and theory. At energy scales below the nucleon mass of about 1 GeV, the intense interaction among the quarks and gluons inside the nucleon makes them highly correlated. Their coherent behaviour causes the emergence of effective degrees of freedom, requiring the application of non-perturbative techniques, such as chiral effective field theory. Here, we present measurements of the neutron's generalized spin-polarizabilities that quantify the neutron's spin precession under electromagnetic fields at very low energy-momentum transfer squared down to 0.035 GeV$^2$. In this regime, chiral effective field theory calculations are expected to be applicable. Our data, however, show a strong discrepancy with these predictions, presenting a challenge to the current description of the neutron's spin properties., Comment: V1: initial version submitted to Nature Physics. V2: Published version. 16 pages, 7 figures. Additional material: 4 data tables (18 pages) V3: Typo corrected in author list. Paper content unchanged
Published: 2021
Full Text: View/download PDF

5. Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering

Author: 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., Gayoso, C. Ayerbe, 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., Dusa, S. Covrig, 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., Riordan, S., Roche, J., Sapkota, I., Sarty, A., Sawatzky, B., Saylor, N. H., Shabestari, M. H., Shahinyan, A., Sirca, 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., and Zhu, P.
Subjects: Nuclear Experiment, High Energy Physics - Experiment
Abstract: We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q$^2$) up to 15.75~\gevsq. 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/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$., Comment: 7 pages, 2 figures
Published: 2021
Full Text: View/download PDF

6. SAMPA Based Streaming Readout Data Acquisition Prototype

Author: Jastrzembski, E., Abbott, D., Gu, J., Gyurjyan, V., Heyes, G., Moffit, B., Pooser, E., Timmer, C., and Hellman, A.
Subjects: Physics - Instrumentation and Detectors
Abstract: We have assembled a small-scale streaming data acquisition system based on the SAMPA front-end ASIC. We report on measurements performed on the SAMPA chip and preliminary cosmic ray data acquired from a Gas Electron Multiplier (GEM) detector read out using the SAMPA., Comment: Submitted to the 22nd Virtual IEEE Real Time Conference, 12-23 October 2020
Published: 2020

7. Measurement of the 3He Spin-Structure Functions and of Neutron (3He) Spin-Dependent Sum Rules at 0.035<Q^2<0.24 GeV^2

Author: Sulkosky, V., Singh, J. T., Peng, C., Chen, J. -P., Deur, A., Abrahamyan, S., Aniol, K. A., Armstrong, D. S., Averett, T., Bailey, S. L., Beck, A., Bertin, P., Butaru, F., Boeglin, W., Camsonne, A., Cates, G. D., Chang, C. C., Choi, Seonho, Chudakov, E., Coman, L., Cornejo, J. C, Craver, B., Cusanno, F., De Leo, R., de Jager, C. W., Denton, J. D., Dhamija, S., Feuerbach, R., Finn, J. M., Frullani, S., Fuoti, K., Gao, H., Garibaldi, F., Gayou, O., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Hansen, J. -O., Hayes, D., Hersman, B., Higinbotham, D. W., Holmstrom, T., Humensky, T. B., Hyde, C. E., Ibrahim, H., Iodice, M., Jiang, X., Kaufman, L. J., Kelleher, A., Keister, K. E., Kim, W., Kolarkar, A., Kolb, N., Korsch, W., Kramer, K., Kumbartzki, G., Lagamba, L., Laine, V., Laveissiere, G., Lerose, J. J., Lhuillier, D., Lindgren, R., Liyanage, N., Lu, H. -J., Ma, B., Margaziotis, D. J., Markowitz, P., McCormick, K., Meziane, M., Meziani, Z. -E., Michaels, R., Moffit, B., Monaghan, P., Nanda, S., Niedziela, J., Niskin, M., Pandolfi, R., Paschke, K. D., Potokar, M., Puckett, A., Punjabi, V. A., Qiang, Y., Ransome, R., Reitz, B., Roche, R., Saha, A., Shabetai, A., Sirca, S., Slifer, K., Snyder, R., Solvignon, P., Stringer, R., Subedi, R., Tobias, W. A., Ton, N., Ulmer, P. E., Urciuoli, G. M., Vacheret, A., Voutier, E., Wang, K., Wan, L., Wojtsekhowski, B., Woo, S., Yao, H., Yuan, J., Zhan, X., Zheng, X., and Zhu, L.
Subjects: Nuclear Experiment, High Energy Physics - Experiment
Abstract: The spin-structure functions $g_1$ and $g_2$, and the spin-dependent partial cross-section $\sigma_\mathrm{TT}$ have been extracted from the polarized cross-sections differences, $\Delta \sigma_{\parallel}\hspace{-0.06cm}\left(\nu,Q^{2}\right)$ and $\Delta \sigma_{\perp}\hspace{-0.06cm}\left(\nu,Q^{2}\right)$ measured for the $\vec{^\textrm{3}\textrm{He}}(\vec{\textrm{e}},\textrm{e}')\textrm{X}$ reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6$^{\circ}$ and 9$^{\circ}$ from a longitudinally or transversely polarized $^{3}$He target. The data cover the kinematic regions of the quasi-elastic, resonance production and beyond. From the extracted spin-structure functions, the first moments $\overline{\Gamma_1}\hspace{-0.06cm}\left(Q^{2}\right)$, $\Gamma_2\hspace{-0.06cm}\left(Q^{2}\right)$ and $I_{\mathrm{TT}}\hspace{-0.06cm}\left(Q^{2}\right)$ are evaluated with high precision for the neutron in the $Q^2$ range from 0.035 to 0.24~GeV$^{2}$. The comparison of the data and the chiral effective field theory predictions reveals the importance of proper treatment of the $\Delta$ degree of freedom for spin observables., Comment: 7 pages, 5 figures, 3 tables. Version published in Phys. Lett. B
Published: 2019
Full Text: View/download PDF

8. Measurement of the single-spin asymmetry $A_y^0$ in quasi-elastic $^3$He$^\uparrow$($e,e'n$) scattering at $0.4 < Q^2 < 1.0$ GeV$/c^2$

Author: Long, E., Zhang, Y. W., Mihoviloviv, M., Jin, G., Sulkosky, V., Kelleher, A., Anderson, B., Higinbotham, D. W., Sirca, S., Allada, K., Annand, J. R. M., Averett, T., Bertozzi, W., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chudakov, E., De Leo, R., Deng, X., Deur, A., Dutta, C., Fassi, L. El, Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Hansen, J. -O., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C. W., Jensen, E., Jiang, X., Jones, M., Kang, H., Katich, J., Khanal, H. P., King, P. M., Korsch, W., LeRose, J., Lindgren, R., Lu, H. -J., Luo, W., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B. E., Pan, K., Parno, D., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A. J. R., Qian, X., Qiang, Y., Qui, X., Riordan, S., Saha, A., Sawatzky, B., Shabestari, M., Shahinyan, A., Shoenrock, B., John, J. St., Subedi, R., Tobias, W. A., Tireman, W., Urciuoli, G. M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either $^2$H or $^3$He targets. In order to extract useful neutron information from a $^3$He target, one must understand how the neutron in a $^3$He system differs from a free neutron by taking into account nuclear effects such as final state interactions and meson exchange currents. The target single spin asymmetry $A_y^0$ is an ideal probe of such effects, as any deviation from zero indicates effects beyond plane wave impulse approximation. New measurements of the target single spin asymmetry $A_y^0$ at $Q^2$ of 0.46 and 0.96 (GeV/$c)^2$ were made at Jefferson Lab using the quasi-elastic $^3\mathrm{He}^{\uparrow}(e,e'n)$ reaction. Our measured asymmetry decreases rapidly, from $>20\%$ at $Q^2=0.46$ (GeV/$c)^2$ to nearly zero at $Q^2=0.96$ (GeV$/c)^2$, demonstrating the fall-off of the reaction mechanism effects as $Q^2$ increases. We also observed a small $\epsilon$-dependent increase in $A_y^0$ compared to previous measurements, particularly at moderate $Q^2$. This indicates that upcoming high $Q^2$ measurements from the Jefferson Lab 12 GeV program can cleanly probe neutron structure from polarized $^3$He using plane wave impulse approximation., Comment: 6 pages, 5 figures
Published: 2019
Full Text: View/download PDF

9. Erratum to: Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter

Author: Guèye, P, Kabir, AA, Giuliani, P, Glister, J, Lee, BW, Gilman, R, Higinbotham, DW, Piasetzky, E, Ron, G, Sarty, AJ, Strauch, S, Adeyemi, A, Allada, K, Armstrong, W, Arrington, J, Arenaövel, H, Beck, A, Benmokhtar, F, Berman, BL, Boeglin, W, Brash, E, Camsonne, A, Calarco, J, Chen, JP, Choi, S, Chudakov, E, Coman, L, Craver, B, Cusanno, F, Dumas, J, Dutta, C, Feuerbach, R, Freyberger, A, Frullani, S, Garibaldi, F, Hansen, J-O, Holmstrom, T, Hyde, CE, Ibrahim, H, Ilieva, Y, Jiang, X, Jones, MK, Katramatou, AT, Kelleher, A, Khrosinkova, E, Kuchina, E, Kumbartzki, G, LeRose, JJ, Lindgren, R, Markowitz, P, Beck, S May-Tal, McCullough, E, Meekins, D, Meziane, M, Meziani, Z-E, Michaels, R, Moffit, B, Norum, BE, Petratos, GG, Oh, Y, Olson, M, Paolone, M, Paschke, K, Perdrisat, CF, Potokar, M, Pomatsalyuk, R, Pomerantz, I, Puckett, A, Punjabi, V, Qian, X, Qiang, Y, Ransome, RD, Reyhan, M, Roche, J, Rousseau, Y, Sawatzky, B, Schulte, E, Schwamb, M, Shabestari, M, Shahinyan, A, Shneor, R, Širca, S, Slifer, K, Solvignon, P, Song, J, Sparks, R, Subedi, R, Urciuoli, GM, Wang, K, Wojtsekhowski, B, Yan, X, Yao, H, Zhan, X, and Zhu, X
Subjects: Affordable and Clean Energy, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics
Abstract: In the original PDF online version of this article, the references 22–26 were missing.These are the missing references.
Published: 2020

10. Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter

Author: Guèye, P, Kabir, AA, Giuliani, P, Glister, J, Lee, BW, Gilman, R, Higinbotham, DW, Piasetzky, E, Ron, G, Sarty, AJ, Strauch, S, Adeyemi, A, Allada, K, Armstrong, W, Arrington, J, Arenaövel, H, Beck, A, Benmokhtar, F, Berman, BL, Boeglin, W, Brash, E, Camsonne, A, Calarco, J, Chen, JP, Choi, S, Chudakov, E, Coman, L, Craver, B, Cusanno, F, Dumas, J, Dutta, C, Feuerbach, R, Freyberger, A, Frullani, S, Garibaldi, F, Hansen, J-O, Holmstrom, T, Hyde, CE, Ibrahim, H, Ilieva, Y, Jiang, X, Jones, MK, Katramatou, AT, Kelleher, A, Khrosinkova, E, Kuchina, E, Kumbartzki, G, LeRose, JJ, Lindgren, R, Markowitz, P, Beck, S May-Tal, McCullough, E, Meekins, D, Meziane, M, Meziani, Z-E, Michaels, R, Moffit, B, Norum, BE, Petratos, GG, Oh, Y, Olson, M, Paolone, M, Paschke, K, Perdrisat, CF, Potokar, M, Pomatsalyuk, R, Pomerantz, I, Puckett, A, Punjabi, V, Qian, X, Qiang, Y, Ransome, RD, Reyhan, M, Roche, J, Rousseau, Y, Sawatzky, B, Schulte, E, Schwamb, M, Shabestari, M, Shahinyan, A, Shneor, R, Širca, S, Slifer, K, Solvignon, P, Song, J, Sparks, R, Subedi, R, Urciuoli, GM, Wang, K, Wojtsekhowski, B, Yan, X, Yao, H, Zhan, X, and Zhu, X
Subjects: nucl-ex, nucl-th, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics
Abstract: Measurements of elastic electron scattering data within the past decade have highlighted two-photon exchange contributions as a necessary ingredient in theoretical calculations to precisely evaluate hydrogen elastic scattering cross sections. This correction can modify the cross section at the few percent level. In contrast, dispersive effects can cause significantly larger changes from the Born approximation. The purpose of this experiment is to extract the carbon-12 elastic cross section around the first diffraction minimum, where the Born term contributions to the cross section are small to maximize the sensitivity to dispersive effects. The analysis uses the LEDEX data from the high resolution Jefferson Lab Hall A spectrometers to extract the cross sections near the first diffraction minimum of 12C at beam energies of 362 MeV and 685 MeV. The results are in very good agreement with previous world data, although with less precision. The average deviation from a static nuclear charge distribution expected from linear and quadratic fits indicate a 30.6% contribution of dispersive effects to the cross section at 1 GeV. The magnitude of the dispersive effects near the first diffraction minimum of 12C has been confirmed to be large with a strong energy dependence and could account for a large fraction of the magnitude for the observed quenching of the longitudinal nuclear response. These effects could also be important for nuclei radii extracted from parity-violating asymmetries measured near a diffraction minimum.
Published: 2020

11. High-resolution hypernuclear spectroscopy at Jefferson Lab, Hall A

Author: Jefferson Lab Hall A Collaboration, Garibaldi, F., Acha, A., Ambrozewicz, P., Aniol, K. A., Beturin, P., Benaoum, H., Benesch, J., Bertin, P. Y., Blomqvist, K. I., Boeglin, W. U., Breuer, H., Brindza, P., Bydzovsky, P., Camsonne, A., Chang, C. C., Chen, J. -P., Choi, Seonho, Chudakov, E. A., Cisbani, E., Colilli, S., Coman, L., Cusanno, F., Craver, B. J., De Cataldo, G., de Jager, C. W., De Leo, R., Deur, A. P., Ferdi, C., Feuerbach, R. J., Folts, E., Frullani, S., Gayou, O., Giuliani, F., Gomez, J., Gricia, M., Hansen, J. O., Hayes, D., Higinbotham, D. W., Holmstrom, T. K., Hyde, C. E., Ibrahim, H. F., Iodice, M., Jiang, X., Kaufman, L. J., Kino, K., Kross, B., Lagamba, L., LeRose, J. J., Lindgren, R. A., Lucentini, M., Margaziotis, D. J., Markowitz, P., Marrone, S., Meekins, D. G., Meziani, Z. E., McCormick, K., Michaels, R. W., Millener, D. J., Miyoshi, T., Moffit, B., Monaghan, P. A., Moteabbed, M., Camacho, C. Munoz, Nanda, S., Nappi, E., Nelyubin, V. V., Norum, B. E., Okasyasu, Y., Paschke, K. D., Perdrisat, C. F., Piasetzky, E., Punjabi, V. A., Qiang, Y., Raue, B., Reimer, P. E., Reinhold, J., Reitz, B., Roche, R. E., Rodriguez, V. M., Saha, A., Santavenere, F., Sarty, A. J., Segal, J., Shahinyan, A., Singh, J., Sirca, S., Snyder, R., Solvignon, P. H., Sotona, M., Subedi, R., Sulkosky, V. A., Suzuki, T., Ueno, H., Ulmer, P. E., Urciuoli, G. M., Voutier, E., Wojtsekhowski, B. B., Zheng, X., and Zorn, C.
Subjects: Nuclear Experiment, Nuclear Theory
Abstract: The experiment E94-107 in Hall A at Jefferson Lab started a systematic study of high resolution hypernuclear spectroscopy in the 0p-shell region of nuclei such as the hypernuclei produced in electroproduction on 9Be, 12C and 16O targets. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a ring-imaging Cherenkov detector were added to the Hall A standard equipment. The high-quality beam, the good spectrometers and the new experimental devices allowed us to obtain very good results. For the first time, measurable strength with sub-MeV energy resolution was observed for the core-excited states of Lambda 12B. A high-quality Lambda 16N hypernuclear spectrum was likewise obtained. A first measurement of the Lambda binding energy for Lambda 16N, calibrated against the elementary reaction on hydrogen, was obtained with high precision, 13.76 +/- 0.16 MeV. Similarly, the first Lambda 9Li hypernuclear spectrum shows general agreement with theory (distorted-wave impulse approximation with the SLA and BS3 electroproduction models and shell-model wave functions). Some disagreement exists with respect to the relative strength of the states making up the first multiplet. A Lambda separation energy of 8.36 MeV was obtained, in agreement with previous results. It has been shown that the electroproduction of hypernuclei can provide information complementary to that obtained with hadronic probes and the gamma-ray spectroscopy technique., Comment: 27 pages, 18 figures, submitted to Physical Review C
Published: 2018
Full Text: View/download PDF

12. Dispersive Corrections to the Born Approximation in Elastic Electron-Nucleus Scattering in the Intermediate Energy Regime

Author: Gueye, P., Glister, A. A. Kabir J., Lee, B. W., Gilman, R., Higinbotham, D. W., Piasetzky, E., Ron, G., Sarty, A. J., Strauch, S., Adeyemi, A., Allada, K., Armstrong, W., Arrington, J., Arenhovel, H., Beck, A., Benmokhtar, F., Berman, B. L., Boeglin, W., Brash, E., Camsonne, A., Calarco, J., Chen, J. P., Choi, S., Chudakov, E., Coman, L., Craver, B., Cusanno, F., Dumas, J., Dutta, C., Feuerbach, R., Freyberger, A., Frullani, S., Garibaldi, F., Hansen, J. -O., Holmstrom, T., Hyde, C. E., Ibrahim, H., Ilieva, Y., Jiang, X., Jones, M. K., Katramatou, A. T., Kelleher, A., Khrosinkova, E., Kuchina, E., Kumbartzki, G., LeRose, J. J., Lindgren, R., Markowitz, P., Beck, S. May-Tal, McCullough, E., Meekins, D., Meziane, M., Meziani, Z. -E., Michaels, R., Moffit, B., Norum, B. E., Petratos, G. G., Oh, Y., Olson, M., Paolone, M., Paschke, K., Perdrisat, C. F., Potokar, M., Pomatsalyuk, R., Pomerantz, I., Puckett, A., Punjabi, V., Qian, X., Qiang, Y., Ransome, R. D., Reyhan, M., Roche, J., Rousseau, Y., Sawatzky, B., Schulte, E., Schwamb, M., Shabestari, M., Shahinyan, A., Shneor, R., Sirca, S., Slifer, K., Solvignon, P., Song, J., Sparks, R., Subedi, R., Urciuoli, G. M., Wang, K., Wojtsekhowski, B., Yan, X., Yao, H., Zhan, X., and Zhu, X.
Subjects: Nuclear Experiment, Nuclear Theory
Abstract: Measurements of elastic electron scattering data within the past decade have highlighted two-photon exchange contributions as a necessary ingredient in theoretical calculations to precisely evaluate hydrogen elastic scattering cross sections. This correction can modify the cross section at the few percent level. In contrast, dispersive effects can cause significantly larger changes from the Born approximation. The purpose of this experiment is to extract the carbon-12 elastic cross section around the first diffraction minimum, where the Born term contributions to the cross section are small to maximize the sensitivity to dispersive effects. The analysis uses the LEDEX data from the high resolution Jefferson Lab Hall A spectrometers to extract the cross sections near the first diffraction minimum of 12C at beam energies of 362 MeV and 685 MeV. The results are in very good agreement with previous world data, although with less precision. The average deviation from a static nuclear charge distribution expected from linear and quadratic fits indicate a 30.6% contribution of dispersive effects to the cross section at 1 GeV. The magnitude of the dispersive effects near the first diffraction minimum of 12C has been confirmed to be large with a strong energy dependence and could account for a large fraction of the magnitude for the observed quenching of the longitudinal nuclear response. These effects could also be important for nuclei radii extracted from parity-violating asymmetries measured near a diffraction minimum., Comment: 14 pages, 10 figures
Published: 2018
Full Text: View/download PDF

13. Measurement of double-polarization asymmetries in the quasi-elastic $^3\vec{\mathrm{He}}(\vec{\mathrm{e}},\mathrm{e}'\mathrm{p})$ process

Author: Mihovilovič, M., Jin, G., Long, E., Zhang, Y. -W., Allada, K., Anderson, B., Annand, J. R. M., Averett, T., Bertozzi, W., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. P., Chudakov, E., De Leo, R., Deng, X., Deltuva, A., Deur, A., Dutta, C., Fassi, L. El, Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golak, J., Golge, S., Gomez, J., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C. W., Jensen, E., Jiang, X., Jones, M., Kamada, H., Kang, H., Katich, J., Khanal, H. P., Kievsky, A., King, P., Korsch, W., LeRose, J., Lindgren, R., Lu, H. -J., Luo, W., Marcucci, L. E., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B. E., Pan, K., Parno, D. S., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A. J. R., Qian, X., Qiang, Y., Qui, X., Riordan, S., Saha, A., Sauer, P. U., Sawatzky, B., Schiavilla, R., Schoenrock, B., Shabestari, M., Shahinyan, A., Širca, S., Skibiński, R., John, J. St., Subedi, R., Sulkosky, V., Tireman, W., Tobias, W. A., Topolnicki, K., Urciuoli, G. M., Viviani, M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Witała, H., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., Zhu, L., and Collaboration, The Jefferson Lab Hall A
Subjects: Nuclear Experiment
Abstract: We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of $^3\mathrm{He}$ proceeding to $\mathrm{pd}$ and $\mathrm{ppn}$ final states, performed in quasi-elastic kinematics at $Q^2 = 0.25\,(\mathrm{GeV}/c)^2$ for missing momenta up to $250\,\mathrm{MeV}/c$. These observables represent highly sensitive tools to investigate the electromagnetic and spin structure of $^3\mathrm{He}$ and the relative importance of two- and three-body effects involved in the breakup reaction dynamics. The measured asymmetries cannot be satisfactorily reproduced by state-of-the-art calculations of $^3\mathrm{He}$ unless their three-body segment is adjusted, indicating that the spin-dependent part of the nuclear interaction governing the three-body breakup process is much smaller than previously thought., Comment: 5 pages, 3 figures, submitted to Phys. Rev. Lett
Published: 2018
Full Text: View/download PDF

14. Technical supplement to “Polarization transfer observables in elastic electron-proton scattering at Q 2 = 2 . 5 , 5 . 2 , 6 . 8 and 8 . 5 GeV 2 ”

Author: Puckett, AJR, Brash, EJ, Jones, MK, Luo, W, Meziane, M, Pentchev, L, Perdrisat, CF, Punjabi, V, Wesselmann, FR, Afanasev, A, Ahmidouch, A, Albayrak, I, Aniol, KA, Arrington, J, Asaturyan, A, Baghdasaryan, H, Benmokhtar, F, Bertozzi, W, Bimbot, L, Bosted, P, Boeglin, W, Butuceanu, C, Carter, P, Chernenko, S, Christy, ME, Cornejo, JC, Covrig, S, Danagoulian, S, Daniel, A, Davidenko, A, Day, D, Dhamija, S, Dutta, D, Ent, R, Frullani, S, Fenker, H, Frlez, E, Garibaldi, F, Gaskell, D, Gilad, S, Gilman, R, Goncharenko, Y, Hafidi, K, Hamilton, D, Higinbotham, DW, Hinton, W, Horn, T, Hu, B, Huang, J, Huber, GM, Jensen, E, Keppel, C, Khandaker, M, King, P, Kirillov, D, Kohl, M, Kravtsov, V, Kumbartzki, G, Li, Y, Mamyan, V, Margaziotis, DJ, Marsh, A, Matulenko, Y, Maxwell, J, Mbianda, G, Meekins, D, Melnik, Y, Miller, J, Mkrtchyan, A, Mkrtchyan, H, Moffit, B, Moreno, O, Mulholland, J, Narayan, A, Nedev, S, Nuruzzaman, Piasetzky, E, Pierce, W, Piskunov, NM, Prok, Y, Ransome, RD, Razin, DS, Reimer, P, Reinhold, J, Rondon, O, Shabestari, M, Shahinyan, A, Shestermanov, K, Širca, S, Sitnik, I, Smykov, L, Smith, G, Solovyev, L, Solvignon, P, Subedi, R, Tomasi-Gustafsson, E, Vasiliev, A, Veilleux, M, Wojtsekhowski, BB, and Wood, S
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Synchrotrons and Accelerators, Physical Sciences, Proton form factors, Magnetic spectrometer, Electromagnetic calorimeter, Proton polarimeter, Polarization transfer method, Spin transport, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences, Nuclear & Particles Physics, Nuclear and plasma physics
Abstract: The GEp-III and GEp-2γ experiments, carried out in Jefferson Lab's Hall C from 2007–2008, consisted of measurements of polarization transfer in elastic electron–proton scattering at momentum transfers of Q2=2.5,5.2,6.8, and 8.54 GeV 2. These measurements were carried out to improve knowledge of the proton electromagnetic form factor ratio R=μpGEp∕GMp at large values of Q2 and to search for effects beyond the Born approximation in polarization transfer observables at Q2=2.5GeV2. The final results of both experiments were reported in a recent archival publication. A full reanalysis of the data from both experiments was carried out in order to reduce the systematic and, for the GEp-2γ experiment, statistical uncertainties. This technical note provides additional details of the final analysis omitted from the main publication, including the final evaluation of the systematic uncertainties.
Published: 2018

15. Technical supplement to “Polarization transfer observables in elastic electron-proton scattering at Q2=2.5,5.2,6.8 and 8.5GeV2”

Author: Puckett, AJR, Brash, EJ, Jones, MK, Luo, W, Meziane, M, Pentchev, L, Perdrisat, CF, Punjabi, V, Wesselmann, FR, Afanasev, A, Ahmidouch, A, Albayrak, I, Aniol, KA, Arrington, J, Asaturyan, A, Baghdasaryan, H, Benmokhtar, F, Bertozzi, W, Bimbot, L, Bosted, P, Boeglin, W, Butuceanu, C, Carter, P, Chernenko, S, Christy, ME, Cornejo, JC, Covrig, S, Danagoulian, S, Daniel, A, Davidenko, A, Day, D, Dhamija, S, Dutta, D, Ent, R, Frullani, S, Fenker, H, Frlez, E, Garibaldi, F, Gaskell, D, Gilad, S, Gilman, R, Goncharenko, Y, Hafidi, K, Hamilton, D, Higinbotham, DW, Hinton, W, Horn, T, Hu, B, Huang, J, Huber, GM, Jensen, E, Keppel, C, Khandaker, M, King, P, Kirillov, D, Kohl, M, Kravtsov, V, Kumbartzki, G, Li, Y, Mamyan, V, Margaziotis, DJ, Marsh, A, Matulenko, Y, Maxwell, J, Mbianda, G, Meekins, D, Melnik, Y, Miller, J, Mkrtchyan, A, Mkrtchyan, H, Moffit, B, Moreno, O, Mulholland, J, Narayan, A, Nedev, S, Nuruzzaman, Piasetzky, E, Pierce, W, Piskunov, NM, Prok, Y, Ransome, RD, Razin, DS, Reimer, P, Reinhold, J, Rondon, O, Shabestari, M, Shahinyan, A, Shestermanov, K, Širca, S, Sitnik, I, Smykov, L, Smith, G, Solovyev, L, Solvignon, P, Subedi, R, Tomasi-Gustafsson, E, Vasiliev, A, Veilleux, M, Wojtsekhowski, BB, and Wood, S
Subjects: Proton form factors, Magnetic spectrometer, Electromagnetic calorimeter, Proton polarimeter, Polarization transfer method, Spin transport, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences
Abstract: The GEp-III and GEp-2γ experiments, carried out in Jefferson Lab's Hall C from 2007–2008, consisted of measurements of polarization transfer in elastic electron–proton scattering at momentum transfers of Q2=2.5,5.2,6.8, and 8.54 GeV 2. These measurements were carried out to improve knowledge of the proton electromagnetic form factor ratio R=μpGEp∕GMp at large values of Q2 and to search for effects beyond the Born approximation in polarization transfer observables at Q2=2.5GeV2. The final results of both experiments were reported in a recent archival publication. A full reanalysis of the data from both experiments was carried out in order to reduce the systematic and, for the GEp-2γ experiment, statistical uncertainties. This technical note provides additional details of the final analysis omitted from the main publication, including the final evaluation of the systematic uncertainties.
Published: 2018

16. Polarization Transfer Observables in Elastic Electron Proton Scattering at $Q^2 = $2.5, 5.2, 6.8, and 8.5 GeV$^2$

Author: Puckett, A. J. R., Brash, E. J., Jones, M. K., Luo, W., Meziane, M., Pentchev, L., Perdrisat, C. F., Punjabi, V., Wesselmann, F. R., Afanasev, A., Ahmidouch, A., Albayrak, I., Aniol, K. A., Arrington, J., Asaturyan, A., Baghdasaryan, H., Benmokhtar, F., Bertozzi, W., Bimbot, L., Bosted, P., Boeglin, W., Butuceanu, C., Carter, P., Chernenko, S., Christy, E., Commisso, M., Cornejo, J. C., Covrig, S., Danagoulian, S., Daniel, A., Davidenko, A., Day, D., Dhamija, S., Dutta, D., Ent, R., Frullani, S., Fenker, H., Frlez, E., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Goncharenko, Y., Hafidi, K., Hamilton, D., Higinbotham, D. W., Hinton, W., Horn, T., Hu, B., Huang, J., Huber, G. M., Jensen, E., Keppel, C., Khandaker, M., King, P., Kirillov, D., Kohl, M., Kravtsov, V., Kumbartzki, G., Li, Y., Mamyan, V., Margaziotis, D. J., Marsh, A., Matulenko, Y., Maxwell, J., Mbianda, G., Meekins, D., Melnik, Y., Miller, J., Mkrtchyan, A., Mkrtchyan, H., Moffit, B., Moreno, O., Mulholland, J., Narayan, A., Nedev, S., Nuruzzaman, Piasetzky, E., Pierce, W., Piskunov, N. M., Prok, Y., Ransome, R. D., Razin, D. S., Reimer, P., Reinhold, J., Rondon, O., Shabestari, M., Shahinyan, A., Shestermanov, K., Sirca, S., Sitnik, I., Smykov, L., Smith, G., Solovyev, L., Solvignon, P., Subedi, R., Tomasi-Gustafsson, E., Vasiliev, A., Veilleux, M., Wojtsekhowski, B. B., Wood, S., Ye, Z., Zanevsky, Y., Zhang, X., Zhang, Y., Zheng, X., and Zhu, L.
Subjects: Nuclear Experiment, High Energy Physics - Experiment
Abstract: The GEp-III and GEp-2$\gamma$ experiments were carried out in Jefferson Lab's (JLab's) Hall C from 2007-2008, to extend the knowledge of $G_E^p/G_M^p$ to the highest practically achievable $Q^2$ and to search for effects beyond the Born approximation in polarization transfer observables of elastic $\vec{e}p$ scattering. This article reports an expanded description of the common experimental apparatus and data analysis procedure, and the results of a final reanalysis of the data from both experiments, including the previously unpublished results of the full-acceptance data of the GEp-2$\gamma$ experiment. The Hall C High Momentum Spectrometer detected and measured the polarization of protons recoiling elastically from collisions of JLab's polarized electron beam with a liquid hydrogen target. A large-acceptance electromagnetic calorimeter detected the elastically scattered electrons in coincidence to suppress inelastic backgrounds. The final GEp-III data are largely unchanged relative to the originally published results. The statistical uncertainties of the final GEp-2$\gamma$ data are significantly reduced at $\epsilon = 0.632$ and $0.783$ relative to the original publication. The decrease with $Q^2$ of $G_E^p/G_M^p$ continues to $Q^2 = 8.5$ GeV$^2$, but at a slowing rate relative to the approximately linear decrease observed in earlier Hall A measurements. At $Q^2 = 2.5$ GeV$^2$, the proton form factor ratio $G_E^p/G_M^p$ shows no statistically significant $\epsilon$-dependence, as expected in the Born approximation. The ratio $P_\ell/P_\ell^{Born}$ of the longitudinal polarization transfer component to its Born value shows an enhancement of roughly 1.4\% at $\epsilon = 0.783$ relative to $\epsilon = 0.149$, with $\approx 1.9\sigma$ significance based on the total uncertainty, implying a similar effect in the transverse component $P_t$ that cancels in the ratio $R$., Comment: 44 pages, 28 figures. Archival publication for the GEp-III and GEp-2gamma experiments that ran in Jefferson Lab's experimental Hall C from October, 2007 to June, 2008. v2: final manuscript as accepted by PRC. v3: Replaced figures 13 and 19 with corrected versions from published Erratum. Also made minor corrections to the text and to Table XI reflecting the corrections in the published Erratum
Published: 2017
Full Text: View/download PDF

17. Technical Supplement to 'Polarization Transfer Observables in Elastic Electron-Proton Scattering at Q$^2$ = 2.5, 5.2, 6.8, and 8.5 GeV$^2$'

Author: Puckett, A. J. R., Brash, E. J., Jones, M. K., Luo, W., Meziane, M., Pentchev, L., Perdrisat, C. F., Punjabi, V., Wesselmann, F. R., Ahmidouch, A., Albayrak, I., Aniol, K. A., Arrington, J., Asaturyan, A., Baghdasaryan, H., Benmokhtar, F., Bertozzi, W., Bimbot, L., Bosted, P., Boeglin, W., Butuceanu, C., Carter, P., Chernenko, S., Christy, E., Commisso, M., Cornejo, J. C., Covrig, S., Danagoulian, S., Daniel, A., Davidenko, A., Day, D., Dhamija, S., Dutta, D., Ent, R., Frullani, S., Fenker, H., Frlez, E., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Goncharenko, Y., Hafidi, K., Hamilton, D., Higinbotham, D. W., Hinton, W., Horn, T., Hu, B., Huang, J., Huber, G. M., Jensen, E., Keppel, C., Khandaker, M., King, P., Kirillov, D., Kohl, M., Kravtsov, V., Kumbartzki, G., Li, Y., Mamyan, V., Margaziotis, D. J., Marsh, A., Matulenko, Y., Maxwell, J., Mbianda, G., Meekins, D., Melnik, Y., Miller, J., Mkrtchyan, A., Mkrtchyan, H., Moffit, B., Moreno, O., Mulholland, J., Narayan, A., Nedev, S., Nurruzzaman, Piasetzky, E., Pierce, W., Piskunov, N. M., Prok, Y., Ransome, R. D., Razin, D. S., Reimer, P., Reinhold, J., Rondon, O., Shabestari, M., Shahinyan, A., Shestermanov, K., Sirca, S., Sitnik, I., Smykov, L., Smith, G., Solovyev, L., Solvignon, P., Subedi, R., Tomasi-Gustafsson, E., Vasiliev, A., Veilleux, M., Wojtsekhowski, B. B., Wood, S., Ye, Z., Zanevsky, Y., Zhang, X., Zhang, Y., Zheng, X., and Zhu, L.
Subjects: Nuclear Experiment, High Energy Physics - Experiment
Abstract: The GEp-III and GEp-2$\gamma$ experiments, carried out in Jefferson Lab's Hall C from 2007-2008, consisted of measurements of polarization transfer in elastic electron-proton scattering at momentum transfers of $Q^2 = 2.5, 5.2, 6.8,$ and $8.54$ GeV$^2$. These measurements were carried out to improve knowledge of the proton electromagnetic form factor ratio $R = \mu_p G_E^p/G_M^p$ at large values of $Q^2$ and to search for effects beyond the Born approximation in polarization transfer observables at $Q^2 = 2.5$ GeV$^2$. The final results of both experiments were reported in a recent archival publication. A full reanalysis of the data from both experiments was carried out in order to reduce the systematic and, for the GEp-2$\gamma$ experiment, statistical uncertainties. This technical note provides additional details of the final analysis omitted from the main publication, including the final evaluation of the systematic uncertainties., Comment: 33 pages, 33 figures. v3 = Final manuscript as accepted for publication in Nuclear Instruments and Methods Section A (in press)
Published: 2017
Full Text: View/download PDF

18. Extraction of the Neutron Electric Form Factor from Measurements of Inclusive Double Spin Asymmetries

Author: Sulkosky, V., Jin, G., Long, E., Zhang, Y. W., Mihovilovic, M., Kelleher, A., Anderson, B., Higinbotham, D. W., Sirca, S., Allada, K., Annand, J. R. M., Averett, T., Bertozzi, W., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chudakov, E., De Leo, R., Deng, X., Deur, A., Dutta, C., Fassi, L. El, Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Hansen, J. -O., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C. W., Jensen, E., Jiang, X., Jones, M., Kang, H., Katich, J., Khanal, H. P., King, P., Korsch, W., LeRose, J., Lindgren, R., Lu, H. J., Luo, W., Markowitz, P., Meekins, D., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B. E., Pan, K., Parno, D., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A. J. R., Qian, X., Qiang, Y., Qui, X., Riordan, S., Saha, A., Sawatzky, B., Shabestari, M., Shahinyan, A., Shoenrock, B., John, J. St., Subedi, R., Tobias, W. A., Tireman, W., Urciuoli, G. M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: $[Background]$ Measurements of the neutron charge form factor, $G^n_E$, are challenging due to the fact that the neutron has no net charge. In addition, measurements of the neutron form factors must use nuclear targets which require accurately accounting for nuclear effects. Extracting $G^n_E$ with different targets and techniques provides an important test of our handling of these effects. $[Purpose]$ The goal of the measurement was to use an inclusive asymmetry measurement technique to extract the neutron charge form factor at a four-momentum transfer of $1~(\rm{GeV/c})^2$. This technique has very different systematic uncertainties than traditional exclusive measurements and thus serves as an independent check of whether nuclear effects have been taken into account correctly. $[Method]$ The inclusive quasi-elastic reaction $^3\overrightarrow{\rm{He}}(\overrightarrow{e},e')$ was measured at Jefferson Lab. The neutron electric form factor, $G_E^n$, was extracted at $Q^2 = 0.98~(\rm{GeV/c})^2$ from ratios of electron-polarization asymmetries measured for two orthogonal target spin orientations. This $Q^2$ is high enough that the sensitivity to $G_E^n$ is not overwhelmed by the neutron magnetic contribution, and yet low enough that explicit neutron detection is not required to suppress pion production. $[Results]$ The neutron electric form factor, $G_E^n$, was determined to be $0.0414\pm0.0077\;{(stat)}\pm0.0022\;{(syst)}$; providing the first high precision inclusive extraction of the neutron's charge form factor. $[Conclusions]$ The use of the inclusive quasi-elastic $^3\overrightarrow{\rm{He}}(\overrightarrow{e},e')$ with a four-momentum transfer near $1~(\rm{GeV/c})^2$ has been used to provide a unique measurement of $G^n_E$. This new result provides a systematically independent validation of the exclusive extraction technique results., Comment: 7 pages, 2 figures, 2 tables
Published: 2017
Full Text: View/download PDF

19. JLab Measurements of the 3He Form Factors at Large Momentum Transfers

Author: Camsonne, A., Katramatou, A. T., Olson, M., Acha, A., Allada, K., Anderson, B. D., Arrington, J., Baldwin, A., Chen, J. -P., Choi, S., Chudakov, E., Cisbani, E., Craver, B., Decowski, P., Dutta, C., Folts, E., Frullani, S., Garibaldi, F., Gilman, R., Gomez, J., Hahn, B., Hansen, J. -O., Higinbotham, D. W., Holmstrom, T., Huang, J., Iodice, M., Jiang, X., Kelleher, A., Khrosinkova, E., Kievsky, A., Kuchina, E., Kumbartzki, G., Lee, B., LeRose, J. J., Lindgren, R. A., Lott, G., Lu, H., Marcucci, L. E., Margaziotis, D. J., Markowitz, P., Marrone, S., Meekins, D., Meziani, Z. -E., Michaels, R., Moffit, B., Norum, B., Petratos, G. G., Puckett, A., Qian, X., Rondon, O., Saha, A., Sawatzky, B., Segal, J., Shabestari, M., Shahinyan, A., Solvignon, P., Sparveris, N., Subedi, R. R., Suleiman, R., Sulkosky, V., Urciuoli, G. M., Viviani, M., Wang, Y., Wojtsekhowski, B. B., Yan, X., Yao, H., Zhang, W. -M., Zheng, X., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: The charge and magnetic form factors, FC and FM, of 3He have been extracted in the kinematic range 25 fm-2 < Q2 < 61 fm-2 from elastic electron scattering by detecting 3He recoil nuclei and electrons in coincidence with the High Resolution Spectrometers of the Hall A Facility at Jefferson Lab. The measurements are indicative of a second diffraction minimum for the magnetic form factor, which was predicted in the Q2 range of this experiment, and of a continuing diffractive structure for the charge form factor. The data are in qualitative agreement with theoretical calculations based on realistic interactions and accurate methods to solve the three-body nuclear problem.
Published: 2016
Full Text: View/download PDF

20. First measurement of unpolarized SIDIS cross section and cross section ratios from a $^3$He target

Author: Yan, X., Allada, K., Aniol, K., Annand, J. R. M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P. C., Bosted, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J. C., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., De Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P. A. M., Dutta, C., Dutta, D., Fassi, L. El, Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Huang, M., Ibrahim, H. F, Iodice, M., Jiang, X., Jin, G., Jones, M. K., Katich, J., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., LeRose, J. J., Li, X., Li, Y., Lindgren, R., Liu, T., Liyanage, N., Long, E., Lu, H. -J., Margaziotis, D. J., Markowitz, P., Marrone, S., McNulty, D., Meziani, Z. -E., Michaels, R., Moffit, B., Camacho, C. Munoz, Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J. -C., Phillips, S. K., Posik, M., Puckett, A. J. R., Qian, X., Qiang, Y., Rakhman, A., Ransome, R., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M. H., Sirca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L. -G., Tobias, W. A., Urciuoli, G. M., Vilardi, I., Wang, K., Wojtsekhowski, B., Wang, Y., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y., Zhang, Y. -W., Zhao, B., Zhao, Y. X., Zheng, X., Zhu, L., Zhu, X., and Zong, X.
Subjects: Nuclear Experiment
Abstract: The unpolarized semi-inclusive deep-inelastic scattering (SIDIS) differential cross sections in $^3$He($e,e^{\prime}\pi^{\pm}$)$X$ have been measured for the first time in Jefferson Lab experiment E06-010 performed with a $5.9\,$GeV $e^-$ beam on a $^3$He target. The experiment focuses on the valence quark region, covering a kinematic range $0.12 < x_{bj} < 0.45$, $1 < Q^2 < 4 \, \textrm{(GeV/c)}^2$, $0.45 < z_{h} < 0.65$, and $0.05 < P_t < 0.55 \, \textrm{GeV/c}$. The extracted SIDIS differential cross sections of $\pi^{\pm}$ production are compared with existing phenomenological models while the $^3$He nucleus approximated as two protons and one neutron in a plane wave picture, in multi-dimensional bins. Within the experimental uncertainties, the azimuthal modulations of the cross sections are found to be consistent with zero.
Published: 2016
Full Text: View/download PDF

21. Erratum: Polarization transfer observables in elastic electron-proton scattering at Q2=2.5, 5.2, 6.8, and 8.5 GeV2 (Physical Review C (2017) 96 (055203) DOI: 10.1103/PhysRevC.96.055203)

Author: Puckett, AJR, Brash, EJ, Jones, MK, Luo, W, Meziane, M, Pentchev, L, Perdrisat, CF, Punjabi, V, Wesselmann, FR, Afanasev, A, Ahmidouch, A, Albayrak, I, Aniol, KA, Arrington, J, Asaturyan, A, Baghdasaryan, H, Benmokhtar, F, Bertozzi, W, Bimbot, L, Bosted, P, Boeglin, W, Butuceanu, C, Carter, P, Chernenko, S, Christy, ME, Commisso, M, Cornejo, JC, Covrig, S, Danagoulian, S, Daniel, A, Davidenko, A, Day, D, Dhamija, S, Dutta, D, Ent, R, Frullani, S, Fenker, H, Frlez, E, Garibaldi, F, Gaskell, D, Gilad, S, Gilman, R, Goncharenko, Y, Hafidi, K, Hamilton, D, Higinbotham, DW, Hinton, W, Horn, T, Hu, B, Huang, J, Huber, GM, Jensen, E, Keppel, C, Khandaker, M, King, P, Kirillov, D, Kohl, M, Kravtsov, V, Kumbartzki, G, Li, Y, Mamyan, V, Margaziotis, DJ, Marsh, A, Matulenko, Y, Maxwell, J, Mbianda, G, Meekins, D, Melnik, Y, Miller, J, Mkrtchyan, A, Mkrtchyan, H, Moffit, B, Moreno, O, Mulholland, J, Narayan, A, Nedev, S, Nuruzzaman, Piasetzky, E, Pierce, W, Piskunov, NM, Prok, Y, Ransome, RD, Razin, DS, Reimer, P, Reinhold, J, Rondon, O, Shabestari, M, Shahinyan, A, Shestermanov, K, Širca, S, Sitnik, I, Smykov, L, Smith, G, Solovyev, L, Solvignon, P, Subedi, R, Tomasi-Gustafsson, E, Vasiliev, A, Veilleux, M, and Wojtsekhowski, BB
Abstract: Subsequent to the release of our original paper, we discovered in the context of preparing our technical supplement [1] for journal publication that a typographical error had existed in the text file that the analysis program used to construct the beam polarization "database" for both the original analysis, published in Ref. [2], and our final analysis. The electron-beam polarization P e and the analyzing power A y cancel exactly in the ratio R , which is proportional to the ratio P t / P l of the transferred polarization components. On the other hand, the extraction of the relative e dependence of P l / P Born l relies on knowledge of the beam polarization. As such, data taking was interrupted roughly every two days during the GEp - 2 ? experiment to perform invasive measurements of the beam polarization using the Hall C Moller polarimeter [3]. The run range affected by the typographical error was entirely contained within the data collected at Q 2 = 2.5 GeV 2 with a beam energy of E e = 3.680 GeV during January 2008. The data from this configuration were combined with the data collected at E e = 3.548 GeV due to the nearly complete overlap of these two settings in terms of Q 2 and e acceptance. It is worth remarking that this typographical error went unnoticed for so long because it only affected a small fraction of the data (less than half of the combined data for ? e ? = 0.790 ) and the difference between the actually assigned beam polarization and the polarization that should have been assigned was comparable in magnitude to the point-to-point systematic uncertainty of the measurement itself. As such, its effect did not show up in various diagnostic plots and statistical tests, such as the time stability of the extracted P l / P Born l ratio. The data for both E e = 3.548 and E e = 3.680 GeV were reprocessed using the corrected beam polarizations to determine the effect of the typographical error on the combined physics results at ? e ? = 0.790 . Because the value of P e cancels in the ratio R , changes in the assumed beam polarization can only affect the results for R via statistical fluctuations due to changes in the relative weighting of different run ranges in the unbinned maximum-likelihood estimators for R . These effects are negligible on the scale of both the statistical and the systematic uncertainties of the data. More noticeable changes are expected in the ratio P l / P Born l since the extracted value of P l is inversely proportional to the assumed value of P e . Table I shows the effect of the corrected beam polarization database on the polarization transfer observables for the combined data for the ? e ? = 0.790 setting, the only measurement affected by the typographical error. The analyzing power did not need to be recalibrated since it was determined using the ? e ? = 0.153 data, which were not affected by the typographical error. As expected, the change in the ratio R is negligible. The value of P Born l , which is computed event by event from the global fit described in the Appendix of the original paper and does not depend on P e , is also unchanged. The magnitudes of P t , P l , and P l / P Born l are reduced by a common multiplicative factor, reflecting the fact that the beam polarization had been underestimated for the run range affected by the typographical error. The most important result of the corrected analysis is that the ratio P l / P Born l has decreased by 0.0024 from 1.0167 to 1.0143, a change comparable in magnitude to the statistical uncertainty but small compared to the total and point-to-point systematic uncertainties. The P l / P Born l result for the original publication [2] would be reduced by the same multiplicative factor as the final result. The physics conclusions of both publications are not materially changed by this correction. (Table Presented). (Figure Presented).
Published: 2018

22. Erratum: Polarization transfer observables in elastic electron-proton scattering at Q2=2.5, 5.2, 6.8, and 8.5GeV2 [Phys. Rev. C 96, 055203 (2017)]

Author: Puckett, AJR, Brash, EJ, Jones, MK, Luo, W, Meziane, M, Pentchev, L, Perdrisat, CF, Punjabi, V, Wesselmann, FR, Afanasev, A, Ahmidouch, A, Albayrak, I, Aniol, KA, Arrington, J, Asaturyan, A, Baghdasaryan, H, Benmokhtar, F, Bertozzi, W, Bimbot, L, Bosted, P, Boeglin, W, Butuceanu, C, Carter, P, Chernenko, S, Christy, ME, Commisso, M, Cornejo, JC, Covrig, S, Danagoulian, S, Daniel, A, Davidenko, A, Day, D, Dhamija, S, Dutta, D, Ent, R, Frullani, S, Fenker, H, Frlez, E, Garibaldi, F, Gaskell, D, Gilad, S, Gilman, R, Goncharenko, Y, Hafidi, K, Hamilton, D, Higinbotham, DW, Hinton, W, Horn, T, Hu, B, Huang, J, Huber, GM, Jensen, E, Keppel, C, Khandaker, M, King, P, Kirillov, D, Kohl, M, Kravtsov, V, Kumbartzki, G, Li, Y, Mamyan, V, Margaziotis, DJ, Marsh, A, Matulenko, Y, Maxwell, J, Mbianda, G, Meekins, D, Melnik, Y, Miller, J, Mkrtchyan, A, Mkrtchyan, H, Moffit, B, Moreno, O, Mulholland, J, Narayan, A, Nedev, S, Nuruzzaman, Piasetzky, E, Pierce, W, Piskunov, NM, Prok, Y, Ransome, RD, Razin, DS, Reimer, P, Reinhold, J, Rondon, O, Shabestari, M, Shahinyan, A, Shestermanov, K, Širca, S, Sitnik, I, Smykov, L, Smith, G, Solovyev, L, Solvignon, P, Subedi, R, Tomasi-Gustafsson, E, Vasiliev, A, Veilleux, M, and Wojtsekhowski, BB
Subjects: Physical Sciences, Classical Physics, Nuclear and plasma physics
Abstract: Subsequent to the release of our original paper, we discovered in the context of preparing our technical supplement [1] for journal publication that a typographical error had existed in the text file that the analysis program used to construct the beam polarization "database" for both the original analysis, published in Ref. [2], and our final analysis. The electron-beam polarization P e and the analyzing power A y cancel exactly in the ratio R , which is proportional to the ratio P t / P l of the transferred polarization components. On the other hand, the extraction of the relative e dependence of P l / P Born l relies on knowledge of the beam polarization. As such, data taking was interrupted roughly every two days during the GEp - 2 ? experiment to perform invasive measurements of the beam polarization using the Hall C Moller polarimeter [3]. The run range affected by the typographical error was entirely contained within the data collected at Q 2 = 2.5 GeV 2 with a beam energy of E e = 3.680 GeV during January 2008. The data from this configuration were combined with the data collected at E e = 3.548 GeV due to the nearly complete overlap of these two settings in terms of Q 2 and e acceptance. It is worth remarking that this typographical error went unnoticed for so long because it only affected a small fraction of the data (less than half of the combined data for ? e ? = 0.790 ) and the difference between the actually assigned beam polarization and the polarization that should have been assigned was comparable in magnitude to the point-to-point systematic uncertainty of the measurement itself. As such, its effect did not show up in various diagnostic plots and statistical tests, such as the time stability of the extracted P l / P Born l ratio. The data for both E e = 3.548 and E e = 3.680 GeV were reprocessed using the corrected beam polarizations to determine the effect of the typographical error on the combined physics results at ? e ? = 0.790 . Because the value of P e cancels in the ratio R , changes in the assumed beam polarization can only affect the results for R via statistical fluctuations due to changes in the relative weighting of different run ranges in the unbinned maximum-likelihood estimators for R . These effects are negligible on the scale of both the statistical and the systematic uncertainties of the data. More noticeable changes are expected in the ratio P l / P Born l since the extracted value of P l is inversely proportional to the assumed value of P e . Table I shows the effect of the corrected beam polarization database on the polarization transfer observables for the combined data for the ? e ? = 0.790 setting, the only measurement affected by the typographical error. The analyzing power did not need to be recalibrated since it was determined using the ? e ? = 0.153 data, which were not affected by the typographical error. As expected, the change in the ratio R is negligible. The value of P Born l , which is computed event by event from the global fit described in the Appendix of the original paper and does not depend on P e , is also unchanged. The magnitudes of P t , P l , and P l / P Born l are reduced by a common multiplicative factor, reflecting the fact that the beam polarization had been underestimated for the run range affected by the typographical error. The most important result of the corrected analysis is that the ratio P l / P Born l has decreased by 0.0024 from 1.0167 to 1.0143, a change comparable in magnitude to the statistical uncertainty but small compared to the total and point-to-point systematic uncertainties. The P l / P Born l result for the original publication [2] would be reduced by the same multiplicative factor as the final result. The physics conclusions of both publications are not materially changed by this correction. (Table Presented). (Figure Presented).
Published: 2018

23. Publisher’s Note: JLab Measurements of the He3 Form Factors at Large Momentum Transfers [Phys. Rev. Lett. 119, 162501 (2017)]

Author: Camsonne, A, Katramatou, AT, Olson, M, Acha, A, Allada, K, Anderson, BD, Arrington, J, Baldwin, A, Chen, J-P, Choi, S, Chudakov, E, Cisbani, E, Craver, B, Decowski, P, Dutta, C, Folts, E, Frullani, S, Garibaldi, F, Gilman, R, Gomez, J, Hahn, B, Hansen, J-O, Higinbotham, DW, Holmstrom, T, Huang, J, Iodice, M, Jiang, X, Kelleher, A, Khrosinkova, E, Kievsky, A, Kuchina, E, Kumbartzki, G, Lee, B, LeRose, JJ, Lindgren, RA, Lott, G, Lu, H, Marcucci, LE, Margaziotis, DJ, Markowitz, P, Marrone, S, Meekins, D, Meziani, Z-E, Michaels, R, Moffit, B, Norum, B, Petratos, GG, Puckett, A, Qian, X, Rondon, O, Saha, A, Sawatzky, B, Segal, J, Shabestari, M, Shahinyan, A, Solvignon, P, Sparveris, N, Subedi, RR, Suleiman, R, Sulkosky, V, Urciuoli, GM, Viviani, M, Wang, Y, Wojtsekhowski, BB, Yan, X, Yao, H, Zhang, W-M, Zheng, X, and Zhu, L
Subjects: Quantum Physics, Physical Sciences, Jefferson Lab Hall A Collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract: This corrects the article DOI: 10.1103/PhysRevLett.119.162501.
Published: 2017

24. Publisher's Note: JLab Measurements of the ^{3}He Form Factors at Large Momentum Transfers [Phys. Rev. Lett. 119, 162501 (2017)].

Author: Camsonne, A, Katramatou, AT, Olson, M, Acha, A, Allada, K, Anderson, BD, Arrington, J, Baldwin, A, Chen, J-P, Choi, S, Chudakov, E, Cisbani, E, Craver, B, Decowski, P, Dutta, C, Folts, E, Frullani, S, Garibaldi, F, Gilman, R, Gomez, J, Hahn, B, Hansen, J-O, Higinbotham, DW, Holmstrom, T, Huang, J, Iodice, M, Jiang, X, Kelleher, A, Khrosinkova, E, Kievsky, A, Kuchina, E, Kumbartzki, G, Lee, B, LeRose, JJ, Lindgren, RA, Lott, G, Lu, H, Marcucci, LE, Margaziotis, DJ, Markowitz, P, Marrone, S, Meekins, D, Meziani, Z-E, Michaels, R, Moffit, B, Norum, B, Petratos, GG, Puckett, A, Qian, X, Rondon, O, Saha, A, Sawatzky, B, Segal, J, Shabestari, M, Shahinyan, A, Solvignon, P, Sparveris, N, Subedi, RR, Suleiman, R, Sulkosky, V, Urciuoli, GM, Viviani, M, Wang, Y, Wojtsekhowski, BB, Yan, X, Yao, H, Zhang, W-M, Zheng, X, Zhu, L, and Jefferson Lab Hall A Collaboration
Subjects: Jefferson Lab Hall A Collaboration, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract: This corrects the article DOI: 10.1103/PhysRevLett.119.162501.
Published: 2017

25. Polarization transfer observables in elastic electron-proton scattering at Q2=2.5, 5.2, 6.8, and 8.5 GeV2 POLARIZATION TRANSFER OBSERVABLES in ELASTIC ... A. J. R. PUCKETT et al.

Author: Puckett, AJR, Brash, EJ, Jones, MK, Luo, W, Meziane, M, Pentchev, L, Perdrisat, CF, Punjabi, V, Wesselmann, FR, Afanasev, A, Ahmidouch, A, Albayrak, I, Aniol, KA, Arrington, J, Asaturyan, A, Baghdasaryan, H, Benmokhtar, F, Bertozzi, W, Bimbot, L, Bosted, P, Boeglin, W, Butuceanu, C, Carter, P, Chernenko, S, Christy, ME, Commisso, M, Cornejo, JC, Covrig, S, Danagoulian, S, Daniel, A, Davidenko, A, Day, D, Dhamija, S, Dutta, D, Ent, R, Frullani, S, Fenker, H, Frlez, E, Garibaldi, F, Gaskell, D, Gilad, S, Gilman, R, Goncharenko, Y, Hafidi, K, Hamilton, D, Higinbotham, DW, Hinton, W, Horn, T, Hu, B, Huang, J, Huber, GM, Jensen, E, Keppel, C, Khandaker, M, King, P, Kirillov, D, Kohl, M, Kravtsov, V, Kumbartzki, G, Li, Y, Mamyan, V, Margaziotis, DJ, Marsh, A, Matulenko, Y, Maxwell, J, Mbianda, G, Meekins, D, Melnik, Y, Miller, J, Mkrtchyan, A, Mkrtchyan, H, Moffit, B, Moreno, O, Mulholland, J, Narayan, A, Nedev, S, Nuruzzaman, Piasetzky, E, Pierce, W, Piskunov, NM, Prok, Y, Ransome, RD, Razin, DS, Reimer, P, Reinhold, J, Rondon, O, Shabestari, M, Shahinyan, A, Shestermanov, K, Širca, S, Sitnik, I, Smykov, L, Smith, G, Solovyev, L, Solvignon, P, Subedi, R, Tomasi-Gustafsson, E, Vasiliev, A, Veilleux, M, and Wojtsekhowski, BB
Abstract: Background: Interest in the behavior of nucleon electromagnetic form factors at large momentum transfers has steadily increased since the discovery, using polarization observables, of the rapid decrease of the ratio GEp/GMp of the proton's electric and magnetic form factors for momentum transfers Q21 GeV2, in strong disagreement with previous extractions of this ratio using the traditional Rosenbluth separation technique. Purpose: The GEp-III and GEp-2γ experiments were carried out in Jefferson Laboratory's (JLab's) Hall C from 2007 to 2008, to extend the knowledge of GEp/GMp to the highest practically achievable Q2 given the maximum beam energy of 6 GeV and to search for effects beyond the Born approximation in polarization transfer observables of elastic ∫ - p scattering. This article provides an expanded description of the common experimental apparatus and data analysis procedures, and reports the results of a final reanalysis of the data from both experiments, including the previously unpublished results of the full-acceptance dataset of the GEp-2γ experiment. Methods: Polarization transfer observables in elastic ∫ - p→∫ - scattering were measured at central Q2 values of 2.5, 5.2, 6.8, and 8.54 GeV2. At Q2=2.5GeV2, data were obtained for central values of the virtual photon polarization parameter ϵ of 0.149, 0.632, and 0.783. The Hall C High Momentum Spectrometer detected and measured the polarization of protons recoiling elastically from collisions of JLab's polarized electron beam with a liquid hydrogen target. A large-acceptance electromagnetic calorimeter detected the elastically scattered electrons in coincidence to suppress inelastic backgrounds. Results: The final GEp-III data are largely unchanged relative to the originally published results. The statistical uncertainties of the final GEp-2γ data are significantly reduced at ϵ=0.632 and 0.783 relative to the original publication. Conclusions: The final GEp-III results show that the decrease with Q2 of GEp/GMp continues to Q2=8.5GeV2, but at a slowing rate relative to the approximately linear decrease observed in earlier Hall A measurements. At Q2=8.5GeV2, GEp/GMp remains positive but is consistent with zero. At Q2=2.5GeV2, GEp/GMp derived from the polarization component ratio R-Pt/P shows no statistically significant ϵ dependence, as expected in the Born approximation. On the other hand, the ratio P""/P""Born of the longitudinal polarization transfer component to its Born value shows an enhancement of roughly 1.7% at ϵ=0.783 relative to ϵ=0.149, with ≈2.2σ significance based on the total uncertainty, implying a similar effect in the transverse component Pt that cancels in the ratio R.
Published: 2017

26. JLab Measurements of the He3 Form Factors at Large Momentum Transfers

Author: Camsonne, A, Katramatou, AT, Olson, M, Acha, A, Allada, K, Anderson, BD, Arrington, J, Baldwin, A, Chen, J-P, Choi, S, Chudakov, E, Cisbani, E, Craver, B, Decowski, P, Dutta, C, Folts, E, Frullani, S, Garibaldi, F, Gilman, R, Gomez, J, Hahn, B, Hansen, J-O, Higinbotham, DW, Holmstrom, T, Huang, J, Iodice, M, Jiang, X, Kelleher, A, Khrosinkova, E, Kievsky, A, Kuchina, E, Kumbartzki, G, Lee, B, LeRose, JJ, Lindgren, RA, Lott, G, Lu, H, Marcucci, LE, Margaziotis, DJ, Markowitz, P, Marrone, S, Meekins, D, Meziani, Z-E, Michaels, R, Moffit, B, Norum, B, Petratos, GG, Puckett, A, Qian, X, Rondon, O, Saha, A, Sawatzky, B, Segal, J, Shabestari, M, Shahinyan, A, Solvignon, P, Sparveris, N, Subedi, RR, Suleiman, R, Sulkosky, V, Urciuoli, GM, Viviani, M, Wang, Y, Wojtsekhowski, BB, Yan, X, Yao, H, Zhang, W-M, Zheng, X, and Zhu, L
Subjects: Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Heart Disease, Cardiovascular, Jefferson Lab Hall A Collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract: The charge and magnetic form factors, F_{C} and F_{M}, respectively, of ^{3}He are extracted in the kinematic range 25 fm^{-2}≤Q^{2}≤61 fm^{-2} from elastic electron scattering by detecting ^{3}He recoil nuclei and scattered electrons in coincidence with the two High Resolution Spectrometers of the Hall A Facility at Jefferson Lab. The measurements find evidence for the existence of a second diffraction minimum for the magnetic form factor at Q^{2}=49.3 fm^{-2} and for the charge form factor at Q^{2}=62.0 fm^{-2}. Both minima are predicted to exist in the Q^{2} range accessible by this Jefferson Lab experiment. The data are in qualitative agreement with theoretical calculations based on realistic interactions and accurate methods to solve the three-body nuclear problem.
Published: 2017

27. JLab Measurements of the ^{3}He Form Factors at Large Momentum Transfers.

Author: Camsonne, A, Katramatou, AT, Olson, M, Acha, A, Allada, K, Anderson, BD, Arrington, J, Baldwin, A, Chen, J-P, Choi, S, Chudakov, E, Cisbani, E, Craver, B, Decowski, P, Dutta, C, Folts, E, Frullani, S, Garibaldi, F, Gilman, R, Gomez, J, Hahn, B, Hansen, J-O, Higinbotham, DW, Holmstrom, T, Huang, J, Iodice, M, Jiang, X, Kelleher, A, Khrosinkova, E, Kievsky, A, Kuchina, E, Kumbartzki, G, Lee, B, LeRose, JJ, Lindgren, RA, Lott, G, Lu, H, Marcucci, LE, Margaziotis, DJ, Markowitz, P, Marrone, S, Meekins, D, Meziani, Z-E, Michaels, R, Moffit, B, Norum, B, Petratos, GG, Puckett, A, Qian, X, Rondon, O, Saha, A, Sawatzky, B, Segal, J, Shabestari, M, Shahinyan, A, Solvignon, P, Sparveris, N, Subedi, RR, Suleiman, R, Sulkosky, V, Urciuoli, GM, Viviani, M, Wang, Y, Wojtsekhowski, BB, Yan, X, Yao, H, Zhang, W-M, Zheng, X, Zhu, L, and Jefferson Lab Hall A Collaboration
Subjects: Jefferson Lab Hall A Collaboration, Heart Disease, Cardiovascular, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract: The charge and magnetic form factors, F_{C} and F_{M}, respectively, of ^{3}He are extracted in the kinematic range 25 fm^{-2}≤Q^{2}≤61 fm^{-2} from elastic electron scattering by detecting ^{3}He recoil nuclei and scattered electrons in coincidence with the two High Resolution Spectrometers of the Hall A Facility at Jefferson Lab. The measurements find evidence for the existence of a second diffraction minimum for the magnetic form factor at Q^{2}=49.3 fm^{-2} and for the charge form factor at Q^{2}=62.0 fm^{-2}. Both minima are predicted to exist in the Q^{2} range accessible by this Jefferson Lab experiment. The data are in qualitative agreement with theoretical calculations based on realistic interactions and accurate methods to solve the three-body nuclear problem.
Published: 2017

28. Production of highly-polarized positrons using polarized electrons at MeV energies

Author: Abbott, D., Adderley, P., Adeyemi, A., Aguilera, P., Ali, M., Areti, H., Baylac, M., Benesch, J., Bosson, G., Cade, B., Camsonne, A., Cardman, L. S., Clark, J., Cole, P., Covert, S., Cuevas, C., Dadoun, O., Dale, D., Dong, H., Dumas, J., Fanchini, E., Forest, T., Forman, E., Freyberger, A., Froidefond, E., Golge, S., Grames, J., Guèye, P., Hansknecht, J., Harrell, P., Hoskins, J., Hyde, C., Josey, B., Kazimi, R., Kim, Y., Machie, D., Mahoney, K., Mammei, R., Marton, M., McCarter, J., McCaughan, M., McHugh, M., McNulty, D., Mesick, K. E., Michaelides, T., Michaels, R., Moffit, B., Moser, D., Camacho, C. Muñoz, Muraz, J. -F., Opper, A., Poelker, M., Réal, J. -S., Richardson, L., Setiniyaz, S., Stutzman, M., Suleiman, R., Tennant, C., Tsai, C., Turner, D., Ungaro, M., Variola, A., Voutier, E., Wang, Y., and Zhang, Y.
Subjects: Physics - Accelerator Physics, High Energy Physics - Experiment, Nuclear Experiment
Abstract: The Polarized Electrons for Polarized Positrons experiment at the injector of the Continuous Electron Beam Accelerator Facility has demonstrated for the first time the efficient transfer of polarization from electrons to positrons produced by the polarized bremsstrahlung radiation induced by a polarized electron beam in a high-$Z$ target. Positron polarization up to 82\% have been measured for an initial electron beam momentum of 8.19~MeV/$c$, limited only by the electron beam polarization. This technique extends polarized positron capabilities from GeV to MeV electron beams, and opens access to polarized positron beam physics to a wide community., Comment: 5 pages, 4 figures
Published: 2016
Full Text: View/download PDF

29. Measurements of $d_{2}^{n}$ and $A_{1}^{n}$: Probing the neutron spin structure

Author: Flay, D., Posik, M., Parno, D. S., Allada, K., Armstrong, W., Averett, T., Benmokhtar, F., Bertozzi, W., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Choi, S., Chudakov, E., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., Deng, X., Deur, A., Dutta, C., Fassi, L. El, Franklin, G. B., Friend, M., Gao, H., Garibaldi, F., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Guo, L., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Hyde, C., Ibrahim, H. F., Jiang, X., Jin, G., Katich, J., Kelleher, A., Kolarkar, A., Korsch, W., Kumbartzki, G., LeRose, J. J., Lindgren, R., Liyanage, N., Long, E., Lukhanin, A., Mamyan, V., McNulty, D., Meziani, Z. -E., Michaels, R., Mihovilovič, M., Moffit, B., Muangma, N., Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Peng, J. C., Qian, X., Qiang, Y., Rakhman, A., Riordan, S., Saha, A., Sawatzky, B., Shabestari, M. H., Shahinyan, A., Širca, S., Solvignon, P., Subedi, R., Sulkosky, V., Tobias, A., Troth, W., Wang, D., Wang, Y., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y., Zhang, Y. -W., Zhao, B., and Zheng, X.
Subjects: Nuclear Experiment, Nuclear Theory
Abstract: We report on the results of the E06-014 experiment performed at Jefferson Lab in Hall A, where a precision measurement of the twist-3 matrix element $d_2$ of the neutron ($d_{2}^{n}$) was conducted. This quantity represents the average color Lorentz force a struck quark experiences in a deep inelastic electron scattering event off a neutron due to its interaction with the hadronizing remnants. This color force was determined from a linear combination of the third moments of the spin structure functions $g_1$ and $g_2$ on $^{3}$He after nuclear corrections had been applied to these moments. The kinematics included two average $Q^{2}$ bins of $3.2$ GeV$^{2}$ and $4.3$ GeV$^{2}$, and Bjorken-$x$ $0.25 \leq x \leq 0.90$ covering the DIS and resonance regions. We found $d_2^n$ to be small and negative for $ = 3.2$ GeV$^{2}$, and smaller for $ = 4.3$ GeV$^{2}$, consistent with a lattice QCD calculation. The twist-4 matrix element $f_{2}^{n}$ was extracted by combining our $d_{2}^{n}$ with the world data on $\Gamma_{1}^{n} = \int_{0}^{1} g_{1}^{n} dx$. We found $f_{2}^{n}$ to be roughly an order of magnitude larger than $d_{2}^{n}$. Utilizing the extracted $d_{2}^{n}$ and $f_{2}^{n}$ data, we separated the color force into its electric and magnetic components, $F_{E}^{y,n}$ and $F_{B}^{y,n}$, and found them to be equal and opposite in magnitude, in agreement with instanton model predictions but not with those from QCD sum rules. Additionally, we have extracted the neutron virtual photon-nucleon asymmetry $A_{1}^{n}$, the structure function ratio $g_{1}^{n}/F_{1}^{n}$, and the quark ratios $(\Delta u + \Delta \bar{u})/(u + \bar{u})$ and $(\Delta d + \Delta \bar{d})/(d + \bar{d})$. These results were found to be consistent with DIS world data and with the prediction of the constituent quark model but at odds with those of perturbative QCD at large $x$., Comment: 55 Pages, 45 figures, 48 tables. 15 supplemental files. Grammatical and typo fixes. Revised some model descriptions and updated analyses for f_2^n and color forces
Published: 2016
Full Text: View/download PDF

30. The E00-110 experiment in Jefferson Lab's Hall A: Deeply Virtual Compton Scattering off the Proton at 6 GeV

Author: Defurne, M., Amaryan, M., Aniol, K. A., Beaumel, M., Benaoum, H., Bertin, P., Brossard, M., Camsonne, A., Chen, J. -P., Chudakov, E., Craver, B., Cusanno, F., de Jager, C. W., Deur, A., Feuerbach, R., Ferdi, C., Fieschi, J. -M., Frullani, S., Fuchey, E., Garcon, M., Garibaldi, F., Gayou, O., Gavalian, G., Gilman, R., Gomez, J., Gueye, P., Guichon, P. A. M., Guillon, B., Hansen, O., Hayes, D., Higinbotham, D., Holmstrom, T., Hyde, C. E., Ibrahim, H., Igarashi, R., Jiang, X., Jo, H. S., Kaufman, L. J., Kelleher, A., Keppel, C., Kolarkar, A., Kuchina, E., Kumbartzki, G., Laveissière, G., LeRose, J. J., Lindgren, R., Liyanage, N., Lu, H. -J., Margaziotis, D. J., Mazouz, M., Meziani, Z. -E., McCormick, K., Michaels, R., Michel, B., Moffit, B., Monaghan, P., Camacho, C. Muñoz, Nanda, S., Nelyubin, V., Paremuzyan, R., Potokar, M., Qiang, Y., Ransome, R. D., Réal, J. -S., Reitz, B., Roblin, Y., Roche, J., Sabatié, F., Saha, A., Sirca, S., Slifer, K., Solvignon, P., Subedi, R., Sulkosky, V., Ulmer, P. E., Voutier, E., Wang, K., Weinstein, L. B., Wojtsekhowski, B., Zheng, X., and Zhu, L.
Subjects: Nuclear Experiment, High Energy Physics - Experiment
Abstract: We present final results on the photon electroproduction ($\vec{e}p\rightarrow ep\gamma$) cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region from Jefferson Lab experiment E00-110. Results from an analysis of a subset of these data were published before, but the analysis has been improved which is described here at length, together with details on the experimental setup. Furthermore, additional data have been analyzed resulting in photon electroproduction cross sections at new kinematic settings, for a total of 588 experimental bins. Results of the $Q^2$- and $x_B$-dependences of both the helicity-dependent and helicity-independent cross sections are discussed. The $Q^2$-dependence illustrates the dominance of the twist-2 handbag amplitude in the kinematics of the experiment, as previously noted. Thanks to the excellent accuracy of this high luminosity experiment, it becomes clear that the unpolarized cross section shows a significant deviation from the Bethe-Heitler process in our kinematics, compatible with a large contribution from the leading twist-2 DVCS$^2$ term to the photon electroproduction cross section. The necessity to include higher-twist corrections in order to fully reproduce the shape of the data is also discussed. The DVCS cross sections in this paper represent the final set of experimental results from E00-110, superseding the previous publication., Comment: 48 pages, 32 figures
Published: 2015
Full Text: View/download PDF

31. Measurement of the Target-Normal Single-Spin Asymmetry in Quasi-Elastic Scattering from the Reaction $^3$He$^\uparrow(e,e^\prime)$

Author: Zhang, Y. -W., Long, E., Mihovilovič, M., Jin, G., Allada, K., Anderson, B., Annand, J. R. M., Averett, T., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. P., Chudakov, E., De Leo, R., Deng, X., Deur, A., Dutta, C., Fassi, L. El, Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C. W., Jensen, E., Jiang, X., John, J. St., Jones, M., Kang, H., Katich, J., Khanal, H. P., King, P., Korsch, W., LeRose, J., Lindgren, R., Lu, H. -J., Luo, W., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B. E., Pan, K., Parno, D., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A. J. R., Qian, X., Qiang, Y., Qiu, X., Riordan, S., Ron, G., Saha, A., Sawatzky, B., Schiavilla, R., Schoenrock, B., Shabestari, M., Shahinyan, A., Širca, S., Subedi, R., Sulkosky, V., Tobias, W. A., Tireman, W., Urciuoli, G. M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Ye, Y., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: We report the first measurement of the target single-spin asymmetry, $A_y$, in quasi-elastic scattering from the inclusive reaction $^3$He$^{\uparrow}(e,e^\prime)$ on a $^3$He gas target polarized normal to the lepton scattering plane. Assuming time-reversal invariance, this asymmetry is strictly zero for one-photon exchange. A non-zero $A_y$ can arise from the interference between the one- and two-photon exchange processes which is sensitive to the details of the sub-structure of the nucleon. An experiment recently completed at Jefferson Lab yielded asymmetries with high statistical precision at $Q^{2}=$ 0.13, 0.46 and 0.97 GeV$^{2}$. These measurements demonstrate, for the first time, that the $^3$He asymmetry is clearly non-zero and negative with a statistical significance of (8-10)$\sigma$. Using measured proton-to-$^{3}$He cross-section ratios and the effective polarization approximation, neutron asymmetries of $-$(1-3)% were obtained. The neutron asymmetry at high $Q^2$ is related to moments of the Generalized Parton Distributions (GPDs). Our measured neutron asymmetry at $Q^2=0.97$ GeV$^2$ agrees well with a prediction based on two-photon exchange using a GPD model and thus provides a new, independent constraint on these distributions.
Published: 2015
Full Text: View/download PDF

32. Double Spin Asymmetries of Inclusive Hadron Electroproductions from a Transversely Polarized $^3\rm{He}$ Target

Author: The Jefferson Lab Hall A Collaboration, Zhao, Y. X., Allada, K., Aniol, K., Annand, J. R. M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P. C., Bosted, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J. C., Cusanno, F., Dalton, M., Deconinck, W., de Jager, C. W., De Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P. A. M., Dutta, C., Dutta, D., Fassi, L. El, Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Huang, M., Ibrahim, H. F, Iodice, M., Jiang, X., Jin, G., Jones, M. K., Katich, J., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., LeRose, J. J., Li, X., Li, Y., Lindgren, R., Liyanage, N., Long, E., Lu, H. -J., Margaziotis, D. J., Markowitz, P., Marrone, S., McNulty, D., Meziani, Z. -E., Michaels, R., Moffit, B., Camacho, C. Muñoz, Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J. -C., Phillips, S. K., Posik, M., Puckett, A. J. R., Qian, X., Qiang, Y., Rakhman, A., Ransome, R., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M. H., Širca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L. -G., Tobias, W. A., Urciuoli, G. M., Vilardi, I., Wang, K., Wojtsekhowski, B., Wang, Y., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y., Zhang, Y. -W., Zhao, B., Zheng, X., Zhu, L., Zhu, X., and Zong, X.
Subjects: Nuclear Experiment, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract: We report the measurement of beam-target double-spin asymmetries ($A_\text{LT}$) in the inclusive production of identified hadrons, $\vec{e}~$+$~^3\text{He}^{\uparrow}\rightarrow h+X$, using a longitudinally polarized 5.9 GeV electron beam and a transversely polarized $^3\rm{He}$ target. Hadrons ($\pi^{\pm}$, $K^{\pm}$ and proton) were detected at 16$^{\circ}$ with an average momentum $<$$P_h$$>$=2.35 GeV/c and a transverse momentum ($p_{T}$) coverage from 0.60 to 0.68 GeV/c. Asymmetries from the $^3\text{He}$ target were observed to be non-zero for $\pi^{\pm}$ production when the target was polarized transversely in the horizontal plane. The $\pi^{+}$ and $\pi^{-}$ asymmetries have opposite signs, analogous to the behavior of $A_\text{LT}$ in semi-inclusive deep-inelastic scattering., Comment: Published in PRC (92.015207), nuclear experiment, high-energy experiment
Published: 2015
Full Text: View/download PDF

33. A precision measurement of the $p$($e,e^\prime p\,$)$\pi^0$ reaction at threshold

Author: Chirapatpimol, K., Shabestari, M. H., Lindgren, R. A., Smith, L. C., Annand, J. R. M., Higinbotham, D. W., Moffit, B., Nelyubin, V., Norum, B. E., Allada, K., Aniol, K., Ardashev, K., Armstrong, D. S., Arndt, R. A., Benmokhtar, F., Bernstein, A. M., Bertozzi, W., Briscoe, W. J., Bimbot, L., Camsonne, A., Chen, J. -P., Choi, S., Chudakov, E., Cisbani, E., Cusanno, F., Dalton, M. M., Dutta, C., Egiyan, K., Fernandez-Ramirez, C., Feuerbach, R., Fissum, K. G., Frullani, S., Garibaldi, F., Gayou, O., Gilman, R., Gilad, S., Goity, J., Gomez, J., Hahn, B., Hamilton, D., Hansen, J. -O., Huang, J., Igarashi, R., Ireland, D., de Jager, C. W., Jin, X., Jiang, X., Jinasundera, T., Kellie, J., Keppel, C. E., Kolb, N., LeRose, J., Liyanage, N., Livingston, K., McNulty, D., Mercado, L., Michaels, R., Mihovilovic, M., Qian, S., Qian, X., Mailyan, S., Mamyan, V., Marrone, S., Monaghan, P., Nanda, S., Perdrisat, C. F., Piasetzky, E., Protopopescu, D., Punjabi, V., Qiang, Y., Rachek, I. A., Rakhman, A., Ron, G., Rosner, G., Saha, A., Sawatzky, B., Shahinyan, A., Sirca, S., Sparveris, N., Subedi, R. R., Suleiman, R., Strakovsky, I., Sulkosky, V., Moinelo, J., Voskanyan, H., Wang, K., Wang, Y., Watson, J., Watts, D., Wojtsekhowski, B., Workman, R. L., Yao, H., Zhan, X., and Zhang, Y.
Subjects: Nuclear Experiment
Abstract: New results are reported from a measurement of $\pi^0$ electroproduction near threshold using the $p(e,e^{\prime} p)\pi^0$ reaction. The experiment was designed to determine precisely the energy dependence of $s-$ and $p-$wave electromagnetic multipoles as a stringent test of the predictions of Chiral Perturbation Theory (ChPT). The data were taken with an electron beam energy of 1192 MeV using a two-spectrometer setup in Hall A at Jefferson Lab. For the first time, complete coverage of the $\phi^*_{\pi}$ and $\theta^*_{\pi}$ angles in the $p \pi^0$ center-of-mass was obtained for invariant energies above threshold from 0.5 MeV up to 15 MeV. The 4-momentum transfer $Q^2$ coverage ranges from 0.05 to 0.155 (GeV/c)$^2$ in fine steps. A simple phenomenological analysis of our data shows strong disagreement with $p-$wave predictions from ChPT for $Q^2>0.07$ (GeV/c)$^2$, while the $s-$wave predictions are in reasonable agreement., Comment: 5 pages, 6 figures
Published: 2015
Full Text: View/download PDF

34. The MOLLER Experiment: An Ultra-Precise Measurement of the Weak Mixing Angle Using M{\o}ller Scattering

Author: MOLLER Collaboration, Benesch, J., Brindza, P., Carlini, R. D., Chen, J-P., Chudakov, E., Covrig, S., Dalton, M. M., Deur, A., Gaskell, D., Gavalya, A., Gomez, J., Higinbotham, D. W., Keppel, C., Meekins, D., Michaels, R., Moffit, B., Roblin, Y., Suleiman, R., Wines, R., Wojtsekhowski, B., Cates, G., Crabb, D., Day, D., Gnanvo, K., Keller, D., Liyanage, N., Nelyubin, V. V., Nguyen, H., Norum, B., Paschke, K., Sulkosky, V., Zhang, J., Zheng, X., Birchall, J., Blunden, P., Gericke, M. T. W., Falk, W. R., Lee, L., Mammei, J., Page, S. A., van Oers, W. T. H., Dehmelt, K., Deshpande, A., Feege, N., Hemmick, T. K., Kumar, K. S., Kutz, T., Miskimen, R., Ramsey-Musolf, M. J., Riordan, S., Saylor, N. Hirlinger, Bessuille, J., Ihloff, E., Kelsey, J., Kowalski, S., Silwal, R., De Cataldo, G., De Leo, R., Di Bari, D., Lagamba, L., Bellini, E. NappiV., Mammoliti, F., Noto, F., Sperduto, M. L., Sutera, C. M., Cole, P., Forest, T. A., Khandekar, M., McNulty, D., Aulenbacher, K., Baunack, S., Maas, F., Tioukine, V., Gilman, R., Myers, K., Ransome, R., Tadepalli, A., Beniniwattha, R., Holmes, R., Souder, P., Armstrong, D. S., Averett, T. D., Deconinck, W., Duvall, W., Lee, A., Pitt, M. L., Dunne, J. A., Dutta, D., Fassi, L. El, De Persio, F., Meddi, F., Urciuoli, G. M., Cisbani, E., Fanelli, C., Garibaldi, F., Johnston, K., Simicevic, N., Wells, S., King, P. M., Roche, J., Arrington, J., Reimer, P. E., Franklin, G., Quinn, B., Ahmidouch, A., Danagoulian, S., Glamazdin, O., Pomatsalyuk, R., Mammei, R., Martin, J. W., Holmstrom, T., Erler, J., Kolomensky, Yu. G., Napolitano, J., Aniol, K. A., Ramsay, W. D., Korkmaz, E., Spayde, D. T., Benmokhtar, F., Del Dotto, A., Perrino, R., Barkanova, S., Aleksejevs, A., and Singh, J.
Subjects: Nuclear Experiment, High Energy Physics - Phenomenology
Abstract: The physics case and an experimental overview of the MOLLER (Measurement Of a Lepton Lepton Electroweak Reaction) experiment at the 12 GeV upgraded Jefferson Lab are presented. A highlight of the Fundamental Symmetries subfield of the 2007 NSAC Long Range Plan was the SLAC E158 measurement of the parity-violating asymmetry $A_{PV}$ in polarized electron-electron (M{\o}ller) scattering. The proposed MOLLER experiment will improve on this result by a factor of five, yielding the most precise measurement of the weak mixing angle at low or high energy anticipated over the next decade. This new result would be sensitive to the interference of the electromagnetic amplitude with new neutral current amplitudes as weak as $\sim 10^{-3}\cdot G_F$ from as yet undiscovered dynamics beyond the Standard Model. The resulting discovery reach is unmatched by any proposed experiment measuring a flavor- and CP-conserving process over the next decade, and yields a unique window to new physics at MeV and multi-TeV scales, complementary to direct searches at high energy colliders such as the Large Hadron Collider (LHC). The experiment takes advantage of the unique opportunity provided by the upgraded electron beam energy, luminosity, and stability at Jefferson Laboratory and the extensive experience accumulated in the community after a round of recent successfully completed parity-violating electron scattering experiments
Published: 2014

35. The CLAS12 Data Acquisition System

Author: Boyarinov, S., Raydo, B., Cuevas, C., Dickover, C., Dong, H., Heyes, G., Abbott, D., Gu, W., Gyurjyan, V., Jastrzembski, E., Moffit, B., Timmer, C., Mandjavidze, I., Heddle, D., Smith, C., Celentano, A., De Vita, R., Baltzell, N., Livingston, K., McKinnon, B., and Moore, W.
Published: 2020
Full Text: View/download PDF

36. The CLAS12 Trigger System

Author: Raydo, B., Boyarinov, S., Celentano, A., Cuevas, C., Vita, R. De, Kubarovsky, V., Moffit, B., Niccolai, S., Paremuzyan, R., and Smith, C.
Published: 2020
Full Text: View/download PDF

37. Measurement of double-polarization asymmetries in the quasi-elastic $^3\vec{\mathrm{He}}(\vec{\mathrm{e}},\mathrm{e}'\mathrm{d})$ process

Author: The Jefferson Lab Hall A Collaboration, Mihovilovič, M., Jin, G., Long, E., Zhang, Y. -W., Allada, K., Anderson, B., Annand, J. R. M., Averett, T., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. P., Chudakov, E., De Leo, R., Deng, X., Deltuva, A., Deur, A., Dutta, C., Fassi, L. El, Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golak, J., Golge, S., Gomez, J., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C. W., Jensen, E., Jiang, X., Jones, M., Kang, H., Katich, J., Khanal, H. P., Kievsky, A., King, P., Korsch, W., LeRose, J., Lindgren, R., Lu, H. -J., Luo, W., Marcucci, L. E., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B. E., Pan, K., Parno, D., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A. J. R., Qian, X., Qiang, Y., Qui, X., Riordan, S., Saha, A., Sauer, P. U., Sawatzky, B., Schiavilla, R., Shabestari, M., Shahinyan, A., Schoenrock, B., Širca, S., Skibiński, R., John, J. St., Subedi, R., Sulkosky, V., Tobias, W. A., Tireman, W., Urciuoli, G. M., Viviani, M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Witała, H., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: We present a precise measurement of double-polarization asymmetries in the $^3\vec{\mathrm{He}}(\vec{\mathrm{e}},\mathrm{e}'\mathrm{d})$ reaction. This particular process is a uniquely sensitive probe of hadron dynamics in $^3\mathrm{He}$ and the structure of the underlying electromagnetic currents. The measurements have been performed in and around quasi-elastic kinematics at $Q^2 = 0.25\,(\mathrm{GeV}/c)^2$ for missing momenta up to $270\,\mathrm{MeV}/c$. The asymmetries are in fair agreement with the state-of-the-art calculations in terms of their functional dependencies on $p_\mathrm{m}$ and $\omega$, but are systematically offset. Beyond the region of the quasi-elastic peak, the discrepancies become even more pronounced. Thus, our measurements have been able to reveal deficiencies in the most sophisticated calculations of the three-body nuclear system, and indicate that further refinement in the treatment of their two- and/or three-body dynamics is required., Comment: 6 pages, 4 figures, accepted for publication at Phys. Rev. Lett
Published: 2014
Full Text: View/download PDF

38. Precision Measurements of $A_1^n$ in the Deep Inelastic Regime

Author: Parno, D. S., Flay, D., Posik, M., Allada, K., Armstrong, W., Averett, T., Benmokhtar, F., Bertozzi, W., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Choi, S., Chudakov, E., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., Deng, X., Deur, A., Dutta, C., Fassi, L. El, Franklin, G. B., Friend, M., Gao, H., Garibaldi, F., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Guo, L., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Hyde, C., Ibrahim, H. F., Jiang, X., Jin, G., Katich, J., Kelleher, A., Kolarkar, A., Korsch, W., Kumbartzki, G., LeRose, J. J., Lindgren, R., Liyanage, N., Long, E., Lukhanin, A., Mamyan, V., McNulty, D., Meziani, Z. -E., Michaels, R., Mihovilovič, M., Moffit, B., Muangma, N., Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Nuruzzaman, Oh, Y., Peng, J. C., Qian, X., Qiang, Y., Rakhman, A., Riordan, S., Saha, A., Sawatzky, B., Shabestari, M. H., Shahinyan, A., Širca, S., Solvignon, P., Subedi, R., Sulkosky, V., Tobias, W. A., Troth, W., Wang, D., Wang, Y., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y., Zhang, Y. -W., Zhao, B., and Zheng, X.
Subjects: Nuclear Experiment
Abstract: We have performed precision measurements of the double-spin virtual-photon asymmetry $A_1$ on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer. Our data cover a wide kinematic range $0.277 \leq x \leq 0.548$ at an average $Q^2$ value of 3.078~(GeV/c)$^2$, doubling the available high-precision neutron data in this $x$ range. We have combined our results with world data on proton targets to extract the ratio of polarized-to-unpolarized parton distribution functions for up quarks and for down quarks in the same kinematic range. Our data are consistent with a previous observation of an $A_1^n$ zero crossing near $x=0.5$. We find no evidence of a transition to a positive slope in $(\Delta d + \Delta \bar{d})/(d + \bar{d})$ up to $x=0.548$., Comment: 6 pages, 2 figures, 3 tables. Two typos corrected in Table 3
Published: 2014
Full Text: View/download PDF

39. Spectroscopy of Lambda-9Li by electroproduction

Author: Urciuoli, G. M., Cusanno, F., Marrone, S., Acha, A., Ambrozewicz, P., Aniol, K. A., Baturin, P., Bertin, P. Y., Benaoum, H., Blomqvist, K. I., Boeglin, W. U., Breuer, H., Brindza, P., Bydzovsky, P., Camsonne, A., Chang, C. C., Chen, J. -P., Choi, Seonho, Chudakov, E. A., Cisbani, E., Colilli, S., Coman, L., Craver, B. J., De Cataldo, G., de Jager, C. W., De Leo, R., Deur, A. P., Ferdi, C., Feuerbach, R. J., Folts, E., Fratoni, R., Frullani, S., Garibaldi, F., Gayou, O., Giuliani, F., Gomez, J., Gricia, M., Hansen, J. O., Hayes, D., Higinbotham, D. W., Holmstrom, T. K., Hyde, C. E., Ibrahim, H. F., Iodice, M., Jiang, X., Kaufman, L. J., Kino, K., Kross, B., Lagamba, L., LeRose, J. J., Lindgren, R. A., Lucentini, M., Margaziotis, D. J., Markowitz, P., Meziani, Z. E., McCormick, K., Michaels, R. W., Millener, D. J., Miyoshi, T., Moffit, B., Monaghan, P. A., Moteabbed, M., Camacho, C. Munoz, Nanda, S., Nappi, E., Nelyubin, V. V., Norum, B. E., Okasyasu, Y., Paschke, K. D., Perdrisat, C. F., Piasetzky, E., Punjabi, V. A., Qiang, Y., Reimer, P. E., Reinhold, J., Reitz, B., Roche, R. E., Rodriguez, V. M., Saha, A., Santavenere, F., Sarty, A. J., Segal, J., Shahinyan, A., Singh, J., Sirca, S., Snyder, R., Solvignon, P. H., Sotona, M., Subedi, R., Sulkosky, V. A., Suzuki, T., Ueno, H., Ulmer, P. E., Veneroni, P., Voutier, E., Wojtsekhowski, B. B., Zheng, X., and Zorn, C.
Subjects: Nuclear Experiment
Abstract: In the absence of accurate data on the free two-body hyperon-nucleon interaction, the spectra of hypernuclei can provide information on the details of the effective hyperon-nucleon interaction. Electroproduction of the hypernucleus Lambda-9Li has been studied for the first time with sub-MeV energy resolution in Hall A at Jefferson Lab on a 9Be target. In order to increase the counting rate and to provide unambiguous kaon identification, two superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH) were added to the Hall A standard equipment. The cross section to low-lying states of Lambda-9Li is concentrated within 3 MeV of the ground state and can be fitted with four peaks. The positions of the doublets agree with theory while a disagreement could exist with respect to the relative strengths of the peaks in the doublets. A Lambda separation energy of 8.36 +- 0.08 (stat.) +- 0.08 (syst.) MeV was measured, in agreement with an earlier experiment., Comment: 14 pages, 8 figures
Published: 2014
Full Text: View/download PDF

40. Single Spin Asymmetries in Charged Kaon Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized $^3{\rm{He}}$ Target

Author: Zhao, Y. X., Wang, Y., Allada, K., Aniol, K., Annand, J. R. M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P. C., Bosted, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J. C., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., De Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P. A. M., Dutta, C., Dutta, D., Fassi, L. El, Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Huang, M., Ibrahim, H. F, Iodice, M., Jiang, X., Jin, G., Jones, M. K., Katich, J., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., LeRose, J. J., Li, X., Li, Y., Lindgren, R., Liyanage, N., Long, E., Lu, H. -J., Margaziotis, D. J., Markowitz, P., Marrone, S., McNulty, D., Meziani, Z. -E., Michaels, R., Moffit, B., Camacho, C. Muñoz, Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J. -C., Phillips, S. K., Posik, M., Puckett, A. J. R., Qian, X., Qiang, Y., Rakhman, A., Ransome, R., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M. H., Širca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L. -G., Tobias, A., Urciuoli, G. M., Vilardi, I., Wang, K., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y., Zhang, Y. -W., Zhao, B., Zheng, X., Zhu, L., Zhu, X., and Zong, X.
Subjects: Nuclear Experiment
Abstract: We report the first measurement of target single spin asymmetries of charged kaons produced in semi-inclusive deep inelastic scattering of electrons off a transversely polarized $^3{\rm{He}}$ target. Both the Collins and Sivers moments, which are related to the nucleon transversity and Sivers distributions, respectively, are extracted over the kinematic range of 0.1$<$$x_{bj}$$<$0.4 for $K^{+}$ and $K^{-}$ production. While the Collins and Sivers moments for $K^{+}$ are consistent with zero within the experimental uncertainties, both moments for $K^{-}$ favor negative values. The Sivers moments are compared to the theoretical prediction from a phenomenological fit to the world data. While the $K^{+}$ Sivers moments are consistent with the prediction, the $K^{-}$ results differ from the prediction at the 2-sigma level., Comment: 6 pages, 3 figures
Published: 2014
Full Text: View/download PDF

41. A Precision Measurement of the Neutron Twist-3 Matrix Element $d_2^n$: Probing Color Forces

Author: Posik, M., Flay, D., Parno, D. S., Allada, K., Armstrong, W., Averett, T., Benmokhtar, F., Bertozzi, W., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Choi, S., Chudakov, E., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., Deng, X., Deur, A., Dutta, C., Fassi, L. El, Franklin, G. B., Friend, M., Gao, H., Garibaldi, F., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Guo, L., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Hyde, C., Ibrahim, H. F., Jiang, X., Jin, G., Katich, J., Kelleher, A., Kolarkar, A., Korsch, W., Kumbartzki, G., LeRose, J. J., Lindgren, R., Liyanage, N., Long, E., Lukhanin, A., Mamyan, V., McNulty, D., Meziani, Z. -E., Michaels, R., Mihovilovič, M., Moffit, B., Muangma, N., Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Nuruzzaman, Oh, Y., Peng, J. C., Qian, X., Qiang, Y., Rakhman, A., Riordan, S., Saha, A., Sawatzky, B., Shabestari, M. H., Shahinyan, A., Širca, S., Solvignon, P., Subedi, R., Sulkosky, V., Tobias, W. A., Troth, W., Wang, D., Wang, Y., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y., Zhang, Y. -W., Zhao, B., and Zheng, X.
Subjects: Nuclear Experiment
Abstract: Double-spin asymmetries and absolute cross sections were measured at large Bjorken $x$ (0.25 $ \le x \le $ 0.90), in both the deep-inelastic and resonance regions, by scattering longitudinally polarized electrons at beam energies of 4.7 and 5.9 GeV from a transversely and longitudinally polarized $^3$He target. In this dedicated experiment, the spin structure function $g_2$ on $^3$He was determined with precision at large $x$, and the neutron twist-three matrix element $d_2^n$ was measured at $\left< Q^2\right>$ of 3.21 and 4.32 GeV$^2$/$c^2$, with an absolute precision of about $10^{-5}$. Our results are found to be in agreement with lattice QCD calculations and resolve the disagreement found with previous data at $\left< Q^2\right> =$ 5 GeV$^2$/$c^2$. Combining $d_2^n$ and a newly extracted twist-four matrix element, $f_2^n$, the average neutron color electric and magnetic forces were extracted and found to be of opposite sign and about 30 MeV/fm in magnitude., Comment: Corrected a typo in the author list and Figure 1 legend. 6 pages, 2 figures, 2 tables
Published: 2014
Full Text: View/download PDF

42. Measurement of pretzelosity asymmetry of charged pion production in Semi-Inclusive Deep Inelastic Scattering on a polarized $^3$He target

Author: Zhang, Y., Qian, X., Allada, K., Dutta, C., Huang, J., Katich, J., Wang, Y., Aniol, K., Annand, J. R. M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P. C., Bosted, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J. C., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., De Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P. A. M., Dutta, D., Fassi, L. El, Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, M., Ibrahim, H. F., Iodice, M., Jiang, X., Jin, G., Jones, M. K., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., LeRose, J. J., Li, X., Li, Y., Lindgren, R., Liyanage, N., Long, E., Lu, H. -J., Margaziotis, D. J., Markowitz, P., Marrone, S., McNulty, D., Meziani, Z. -E., Michaels, R., Moffit, B., Camacho, C. Muñoz, Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J. C., Phillips, S. K., Posik, M., Puckett, A. J. R., Qiang, Y., Rakhman, A., Ransome, R. D., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M. H., Sirca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L. -G., Tobias, W. A., Urciuoli, G. M., Vilardi, I., Wang, K., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y. -W., Zhao, B., Zheng, X., Zhu, L., Zhu, X., and Zong, X.
Subjects: Nuclear Experiment
Abstract: An experiment to measure single-spin asymmetries in semi-inclusive production of charged pions in deep-inelastic scattering on a transversely polarized $^3$He target was performed at Jefferson Lab in the kinematic region of $0.16
Published: 2013
Full Text: View/download PDF

43. Single Spin Asymmetries of Inclusive Hadrons Produced in Electron Scattering from a Transversely Polarized $^3$He Target

Author: Allada, K., Zhao, Y. X., Aniol, K., Annand, J. R. M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P. C., Bosted, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J. C., Cusanno, F., Dalton, M., Deconinck, W., de Jager, C. W., De Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P. A. M., Dutta, C., Dutta, D., Fassi, L. El, Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Huang, M., Ibrahim, H. F, Iodice, M., Jiang, X., Jin, G., Jones, M. K., Katich, J., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., LeRose, J. J., Li, X., Li, Y., Lindgren, R., Liyanage, N., Long, E., Lu, H. -J., Margaziotis, D. J., Markowitz, P., Marrone, S., McNulty, D., Meziani, Z. -E., Michaels, R., Moffit, B., Camacho, C. Munoz, Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J. -C., Phillips, S. K., Posik, M., Puckett, A. J. R., Qian, X., Qiang, Y., Rakhman, A., Ransome, R., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M. H., Sirca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L. -G., Tobias, A., Urciuoli, G. M., Vilardi, I., Wang, K., Wang, Y., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y., Zhang, Y. -W., Zhao, B., Zheng, X., Zhu, L., Zhu, X., and Zong, X.
Subjects: Nuclear Experiment, High Energy Physics - Experiment
Abstract: We report the first measurement of target single-spin asymmetries (A$_N$) in the inclusive hadron production reaction, $e~$+$~^3\text{He}^{\uparrow}\rightarrow h+X$, using a transversely polarized $^3$He target. The experiment was conducted at Jefferson Lab in Hall A using a 5.9-GeV electron beam. Three types of hadrons ($\pi^{\pm}$, $\text{K}^{\pm}$ and proton) were detected in the transverse hadron momentum range 0.54 $
Published: 2013
Full Text: View/download PDF

44. Measurement of the Target-Normal Single-Spin Asymmetry in Deep-Inelastic Scattering from the Reaction $^{3}\mathrm{He}^{\uparrow}(e,e')X$

Author: Katich, J., Qian, X., Zhao, Y. X., Allada, K., Aniol, K., Annand, J. R. M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P. C., Bosted, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J. C., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., De Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P. A. M., Dutta, C., Dutta, D., Fassi, L. El, Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Huang, M., Ibrahim, H. F., Iodice, M., Jiang, X., Jin, G., Jones, M. K., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., LeRose, J. J., Li, X., Li, Y., Lindgren, R., Liyanage, N., Long, E., Lu, H. -J., Margaziotis, D. J., Markowitz, P., Marrone, S., McNulty, D., Meziani, Z. -E., Michaels, R., Moffit, B., Camacho, C. Muńoz, Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J. C., Phillips, S. K., Posik, M., Puckett, A. J. R., Qiang, Y., Rakhman, A., Ransome, R. D., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M. H., Širca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L. -G., Tobias, A., Urciuoli, G. M., Vilardi, I., Wang, K., Wang, Y., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y., Zhang, Y. -W., Zhao, B., Zheng, X., Zhu, L., Zhu, X., and Zong, X.
Subjects: Nuclear Experiment
Abstract: We report the first measurement of the target-normal single-spin asymmetry in deep-inelastic scattering from the inclusive reaction $^3$He$^{\uparrow}\left(e,e' \right)X$ on a polarized $^3$He gas target. Assuming time-reversal invariance, this asymmetry is strictly zero in the Born approximation but can be non-zero if two-photon-exchange contributions are included. The experiment, conducted at Jefferson Lab using a 5.89 GeV electron beam, covers a range of $1.7 < W < 2.9$ GeV, $1.02$ GeV, which is non-zero at the $2.89\sigma$ level. Our measured asymmetry agrees both in sign and magnitude with a two-photon-exchange model prediction that uses input from the Sivers transverse momentum distribution obtained from semi-inclusive deep-inelastic scattering., Comment: This is the final edited version as published in PRL
Published: 2013
Full Text: View/download PDF

45. JLab Measurement of the $^4$He Charge Form Factor at Large Momentum Transfers

Author: Camsonne, A., Katramatou, A. T., Olson, M., Sparveris, N., Acha, A., Allada, K., Anderson, B. D., Arrington, J., Baldwin, A., Chen, J. -P., Choi, S., Chudakov, E., Cisbani, E., Craver, B., Decowski, P., Dutta, C., Folts, E., Frullani, S., Garibaldi, F., Gilman, R., Gomez, J., Hahn, B., Hansen, J. -O., Higinbotham, D., Holmstrom, T., Huang, J., Iodice, M., Jiang, X., Kelleher, A., Khrosinkova, E., Kievsky, A., Kuchina, E., Kumbartzki, G., Lee, B., LeRose, J. J., Lindgren, R. A., Lott, G., Lu, H., Marcucci, L. E., Margaziotis, D. J., Markowitz, P., Marrone, S., Meekins, D., Meziani, Z. -E., Michaels, R., Moffit, B., Norum, B., Petratos, G. G., Puckett, A., Qian, X., Rondon, O., Saha, A., Sawatzky, B., Segal, J., Shabestari, M., Shahinyan, A., Solvignon, P., Subedi, R. R., Suleiman, R., Sulkosky, V., Urciuoli, G. M., Viviani, M., Wang, Y., Wojtsekhowski, B. B., Yan, X., Yao, H., Zhang, W. -M., Zheng, X., and Zhu, L.
Subjects: Nuclear Experiment, High Energy Physics - Experiment
Abstract: The charge form factor of $^$4He has been extracted in the range 29 fm$^{-2}$ $\le Q^2 \le 77$ fm$^{-2}$ from elastic electron scattering, detecting $^4$He nuclei and electrons in coincidence with the High Resolution Spectrometers of the Hall A Facility of Jefferson Lab. The results are in qualitative agreement with realistic meson-nucleon theoretical calculations. The data have uncovered a second diffraction minimum, which was predicted in the $Q^2$ range of this experiment, and rule out conclusively long-standing predictions of dimensional scaling of high-energy amplitudes using quark counting., Comment: 4 pages, 2 figures
Published: 2013
Full Text: View/download PDF

46. Moments of the neutron $g_2$ structure function at intermediate $Q^2$

Author: Solvignon, P., Liyanage, N., Chen, J. -P., Choi, Seonho, Slifer, K., Aniol, K., Averett, T., Boeglin, W., Camsonne, A., Cates, G. D., Chang, C. C., Chudakov, E., Craver, B., Cusanno, F., Deur, A., Dutta, D., Ent, R., Feuerbach, R., Frullani, S., Gao, H., Garibaldi, F., Gilman, R., Glashausser, C., Gorbenko, V., Hansen, O., Higinbotham, D. W., Ibrahim, H., Jiang, X., Jones, M., Kelleher, A., Kelly, J., Keppel, C., Kim, W., Korsch, W., Kramer, K., Kumbartzki, G., LeRose, J. J., Lindgren, R., Ma, B., Margazioti, D. J., Markowitz, P., McCormick, K., Meziani, Z. -E., Michaels, R., Moffit, B., Monaghan, P., Camacho, C. Munoz, Paschke, K., Reitz, B., Saha, A., Shneor, R., Singh, J., Sulkosky, V., Tobias, A., Urciuoli, G. M., Wang, K., Wijesooriya, K., Wojtsekhowski, B., Woo, S., Yang, J. -C., Zheng, X., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: We present new experimental results of the $^3$He spin structure function $g_2$ in the resonance region at $Q^2$ values between 1.2 and 3.0 (GeV/c)$^2$. Spin dependent moments of the neutron were then extracted. Our main result, the resonance contribution to the neutron $d_2$ matrix element, was found to be small at $$=2.4 (GeV/c)$^2$ and in agreement with the Lattice QCD calculation. The Burkhardt-Cottingham sum rule for $^3$He and the neutron was tested with the measured data and using the Wandzura-Wilczek relation for the low $x$ unmeasured region. A small deviation was observed at $Q^2$ values between 0.5 and 1.2 (GeV/c)$^2$ for the neutron.
Published: 2013
Full Text: View/download PDF

47. Hard Two-body Photodisintegration of 3He

Author: Pomerantz, I., Ilieva, Y., Gilman, R., Higinbotham, D. W., Piasetzky, E., Strauch, S., Adhikari, K. P., Aghasyan, M., Allada, K., Amaryan, M. J., Pereira, S. Anefalos, Anghinolfi, M., Baghdasaryan, H., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Beck, A., Beck, S., Bedlinskiy, I., Berman, B. L., Biselli, A. S., Boeglin, W., Bono, J., Bookwalter, C., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Bubis, N., Burkert, V., Camsonne, A., Canan, M., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chirapatpimol, K., Cisbani, E., Cole, P. L., Contalbrigo, M., Crede, V., Cusanno, F., D'Angelo, A., Daniel, A., Dashyan, N., de Jager, C. W., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dodge, G. E., Doughty, D., Dupre, R., Dutta, C., Egiyan, H., Alaoui, A. El, Fassi, L. El, Eugenio, P., Fedotov, G., Fegan, S., Fleming, J. A., Fradi, A., Garibaldi, F., Geagla, O., Gevorgyan, N., Giovanetti, K. L., Girod, F. X., Glister, J., Goetz, J. T., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guegan, B., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Harrison, N., Heddle, D., Hicks, K., Ho, D., Holtrop, M., Hyde, C. E., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jiang, X., Jo, H. S., Joo, K., Katramatou, A. T., Keller, D., Khandaker, M., Khetarpal, P., Khrosinkova, E., Kim, A., Kim, W., Klein, F. J., Koirala, S., Kubarovsky, A., Kubarovsky, V., Kuleshov, S. V., Kvaltine, N. D., Lee, B., LeRose, J. J., Lewis, S., Lindgren, R., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Mao, Y., Martinez, D., Mayer, M., McCullough, E., McKinnon, B., Meekins, D., Meyer, C. A., Michaels, R., Mineeva, T., Mirazita, M., Moffit, B., Mokeev, V., Montgomery, R. A., Moutarde, H., Munevar, E., Camacho, C. Munoz, Nadel-Turonski, P., Nasseripour, R., Nepali, C. S., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Pappalardo, L. L., Paremuzyan, R., Park, K., Park, S., Petratos, G. G., Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Procureur, S., Protopopescu, D., Puckett, A. J. R., Qian, X., Qiang, Y., Ricco, G., Rimal, D., Ripani, M., Ritchie, B. G., Rodriguez, I., Ron, G., Rosner, G., Rossi, P., Sabatie, F., Saha, A., Saini, M. S., Sarty, A. J., Sawatzky, B., Saylor, N. A., Schott, D., Schulte, E., Schumacher, R. A., Seder, E., Seraydaryan, H., Shneor, R., Smith, G. D., Sokhan, D., Sparveris, N., Stepanyan, S. S., Stepanyan, S., Stoler, P., Subedi, R., Sulkosky, V., Taiuti, M., Tang, W., Taylor, C. E., Tkachenko, S., Ungaro, M., Vernarsky, B., Vineyard, M. F., Voskanyan, H., Voutier, E., Walford, N. K., Wang, Y., Watts, D. P., Weinstein, L. B., Weygand, D. P., Wojtsekhowski, B., Wood, M. H., Yan, X., Yao, H., Zachariou, N., Zhan, X., Zhang, J., Zhao, Z. W., Zheng, X., and Zonta, I.
Subjects: Nuclear Experiment
Abstract: We have measured cross sections for the gamma+3He->p+d reaction at photon energies of 0.4 - 1.4 GeV and a center-of-mass angle of 90 deg. We observe dimensional scaling above 0.7 GeV at this center-of-mass angle. This is the first observation of dimensional scaling in the photodisintegration of a nucleus heavier than the deuteron.
Published: 2013
Full Text: View/download PDF

48. Measurement of the 12C(e,e'p)11B Two-Body Breakup Reaction at High Missing Momentum Values

Author: Monaghan, P., Shneor, R., Subedi, R., Anderson, B. D., Aniol, K., Annand, J., Arrington, J., Benaoum, H., Benmokhtar, F., Bertin, P., Bertozzi, W., Boeglin, W., Chen, J. P., Choi, Seonho, Chudakov, E., Atti, C. Ciofi degli, Cisbani, E., Cosyn, W., Craver, B., de Jager, C. W., Feuerbach, R. J., Folts, E., Frullani, S., Garibaldi, F., Gayou, O., Gilad, S., Gilman, R., Glamazdin, O., Gomez, J., Hansen, O., Higinbotham, D. W., Holmstrom, T., Ibrahim, H., Igarashi, R., Jans, E., Jiang, X., Jiang, Y., Kaufman, L., Kelleher, A., Kolarkar, A., Kuchina, E., Kumbartzki, G., LeRose, J. J., Lindgren, R., Liyanage, N., Margaziotis, D. J., Markowitz, P., Marrone, S., Mazouz, M., Meekins, D., Michaels, R., Moffit, B., Morita, H., Nanda, S., Perdrisat, C. F., Piasetzky, E., Potokar, M., Punjabi, V., Qiang, Y., Reinhold, J., Reitz, B., Ron, G., Rosner, G., Ryckebusch, J., Saha, A., Sawatzky, B., Segal, J., Shahinyan, A., Sirca, S., Slifer, K., Solvignon, P., Sulkosky, V., Thompson, N., Ulmer, P. E., Urciuoli, G. M., Voutier, E., Wang, K., Watson, J. W., Weinstein, L. B., Wojtsekhowski, B., Wood, S., Yao, H., Zheng, X., and Zhu, L.
Subjects: Nuclear Experiment
Abstract: The five-fold differential cross section for the 12C(e,e'p)11B reaction was determined over a missing momentum range of 200-400 MeV/c, in a kinematics regime with Bjorken x > 1 and Q2 = 2.0 (GeV/c)2. A comparison of the results and theoretical models and previous lower missing momentum data is shown. The theoretical calculations agree well with the data up to a missing momentum value of 325 MeV/c and then diverge for larger missing momenta. The extracted distorted momentum distribution is shown to be consistent with previous data and extends the range of available data up to 400 MeV/c., Comment: 12 pages, 1 table and 3 figures for submission to Journal Physics G
Published: 2013
Full Text: View/download PDF

49. The MOLLER Experiment: An Ultra-Precise Measurement of the Weak Mixing Angle Using Møller Scattering

Author: Collaboration, MOLLER, Benesch, J, Brindza, P, Carlini, RD, Chen, J-P, Chudakov, E, Covrig, S, Dalton, MM, Deur, A, Gaskell, D, Gavalya, A, Gomez, J, Higinbotham, DW, Keppel, C, Meekins, D, Michaels, R, Moffit, B, Roblin, Y, Suleiman, R, Wines, R, Wojtsekhowski, B, Cates, G, Crabb, D, Day, D, Gnanvo, K, Keller, D, Liyanage, N, Nelyubin, VV, Nguyen, H, Norum, B, Paschke, K, Sulkosky, V, Zhang, J, Zheng, X, Birchall, J, Blunden, P, Gericke, MTW, Falk, WR, Lee, L, Mammei, J, Page, SA, Oers, WTH van, Dehmelt, K, Deshpande, A, Feege, N, Hemmick, TK, Kumar, KS, Kutz, T, Miskimen, R, Ramsey-Musolf, MJ, Riordan, S, Saylor, N Hirlinger, Bessuille, J, Ihloff, E, Kelsey, J, Kowalski, S, Silwal, R, Cataldo, G De, Leo, R De, Bari, D Di, Lagamba, L, Bellini, E NappiV, Mammoliti, F, Noto, F, Sperduto, ML, Sutera, CM, Cole, P, Forest, TA, Khandekar, M, McNulty, D, Aulenbacher, K, Baunack, S, Maas, F, Tioukine, V, Gilman, R, Myers, K, Ransome, R, Tadepalli, A, Beniniwattha, R, Holmes, R, Souder, P, Armstrong, DS, Averett, TD, Deconinck, W, Duvall, W, Lee, A, Pitt, ML, Dunne, JA, Dutta, D, Fassi, L El, Persio, F De, Meddi, F, Urciuoli, GM, Cisbani, E, Fanelli, C, Garibaldi, F, Johnston, K, Simicevic, N, Wells, S, and King, PM
Subjects: nucl-ex, hep-ph
Abstract: The physics case and an experimental overview of the MOLLER (Measurement Of aLepton Lepton Electroweak Reaction) experiment at the 12 GeV upgraded JeffersonLab are presented. A highlight of the Fundamental Symmetries subfield of the2007 NSAC Long Range Plan was the SLAC E158 measurement of the parity-violatingasymmetry $A_{PV}$ in polarized electron-electron (M{\o}ller) scattering. Theproposed MOLLER experiment will improve on this result by a factor of five,yielding the most precise measurement of the weak mixing angle at low or highenergy anticipated over the next decade. This new result would be sensitive tothe interference of the electromagnetic amplitude with new neutral currentamplitudes as weak as $\sim 10^{-3}\cdot G_F$ from as yet undiscovered dynamicsbeyond the Standard Model. The resulting discovery reach is unmatched by anyproposed experiment measuring a flavor- and CP-conserving process over the nextdecade, and yields a unique window to new physics at MeV and multi-TeV scales,complementary to direct searches at high energy colliders such as the LargeHadron Collider (LHC). The experiment takes advantage of the unique opportunityprovided by the upgraded electron beam energy, luminosity, and stability atJefferson Laboratory and the extensive experience accumulated in the communityafter a round of recent successfully completed parity-violating electronscattering experiments
Published: 2014

50. New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei

Author: HAPPEX, The, Collaborations, PREX, Abrahamyan, S., Acha, A., Afanasev, A., Ahmed, Z., Albataineh, H., Aniol, K., Armstrong, D. S., Armstrong, W., Arrington, J., Averett, T., Babineau, B., Bailey, S. L., Barber, J., Barbieri, A., Beck, A., Bellini, V., Beminiwattha, R., Benaoum, H., Benesch, J., Benmokhtar, F., Bertin, P., Bielarski, T., Boeglin, W., Bosted, P., Butaru, F., Burtin, E., Cahoon, J., Camsonne, A., Canan, M., Carter, P., Chang, C. C., Cates, G. D., Chao, Y. C., Chen, C., Chen, J. P., Choi, Seonho, Chudakov, E., Cisbani, E., Craver, B., Cusanno, F., Dalton, M. M., De Leo, R., de Jager, K., Deconinck, W., Decowski, P., Deepa, D., Deng, X., Deur, A., Dutta, D., Etile, A., Ferdi, C., Feuerbach, R. J., Finn, J. M., Flay, D., Franklin, G. B., Friend, M., Frullani, S., Fuchey, E., Fuchs, S. A., Fuoti, K., Garibaldi, F., Gasser, E., Gilman, R., Giusa, A., Glamazdin, A., Glesener, L. E., Gomez, J., Gorchtein, M., Grames, J., Grimm, K., Gu, C., Hansen, O., Hansknecht, J., Hen, O., Higinbotham, D. W., Holmes, R. S., Holmstrom, T., Horowitz, C. J., Hoskins, J., Huang, J., Humensky, T. B., Hyde, C. E., Ibrahim, H., Itard, F., Jen, C. M., Jensen, E., Jiang, X., Jin, G., Johnston, S., Katich, J., Kaufman, L. J., Kelleher, A., Kliakhandler, K., King, P. M., Kolarkar, A., Kowalski, S., Kuchina, E., Kumar, K. S., Lagamba, L., Lambert, D., LaViolette, P., Leacock, J., Leckey IV, J., Lee, J. H., LeRose, J. J., Lhuillier, D., Lindgren, R., Liyanage, N., Lubinsky, N., Mammei, J., Mammoliti, F., Margaziotis, D. J., Markowitz, P., Mazouz, M., McCormick, K., McCreary, A., McNulty, D., Meekins, D. G., Mercado, L., Meziani, Z. E., Michaels, R. W., Mihovilovic, M., Moffit, B., Monaghan, P., Muangma, N., Munoz-Camacho, C., Nanda, S., Nelyubin, V., Neyret, D., Nuruzzaman, Oh, Y., Otis, K., Palmer, A., Parno, D., Paschke, K. D., Phillips, S. K., Poelker, M., Pomatsalyuk, R., Posik, M., Potokar, M., Prok, K., Puckett, A. J. R., Qian, X., Qiang, Y., Quinn, B., Rakhman, A., Reimer, P. E., Reitz, B., Riordan, S., Roche, J., Rogan, P., Ron, G., Russo, G., Saenboonruang, K., Saha, A., Sawatzky, B., Shahinyan, A., Silwal, R., Singh, J., Sirca, S., Slifer, K., Snyder, R., Solvignon, P., Souder, P. A., Sperduto, M. L., Subedi, R., Stutzman, M. L., Suleiman, R., Sulkosky, V., Sutera, C. M., Tobias, W. A., Troth, W., Urciuoli, G. M., Ulmer, P., Vacheret, A., Voutier, E., Waidyawansa, B., Wang, D., Wang, K., Wexler, J., Whitbeck, A., Wilson, R., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yim, V., Zana, L., Zhan, X., Zhang, J., Zhang, Y., Zheng, X., Ziskin, V., and Zhu, P.
Subjects: Nuclear Experiment
Abstract: We have measured the beam-normal single-spin asymmetry $A_n$ in the elastic scattering of 1-3 GeV transversely polarized electrons from $^1$H and for the first time from $^4$He, $^{12}$C, and $^{208}$Pb. For $^1$H, $^4$He and $^{12}$C, the measurements are in agreement with calculations that relate $A_n$ to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the $^{208}$Pb result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new $A_n$ measurements might emerge as a new and sensitive probe of the structure of heavy nuclei., Comment: 5 pages, 3 figures, accepted by PRL. v3: fixed one author name and affiliation, otherwise no change
Published: 2012
Full Text: View/download PDF

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Publication Type

Journal

Database

Publisher

254 results on '"Moffit B"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources