Measurement of the Bjorken Sum at very low $Q^2$

Autor: Deur, A., Chen, J. P., Kuhn, S. E., Peng, C., Ripani, M., Sulkosky, V., Adhikari, K., Battaglieri, M., Burkert, V. D., Cates, G. D., De Vita, R., Dodge, G. E., Fassi, L. El, Garibaldi, F., Kang, H., Osipenko, M., Singh, J. T., Slifer, K., Zhang, J., Zheng, Xiaochao

Publikováno v: Phys. Lett. B 825 136878 (2022)

We present new data on the Bjorken sum $\overline \Gamma_1^{p-n}(Q^2)$ at 4-momentum transfer $ 0.021 \leq Q^2 \leq 0.496$ GeV$^2$. The data were obtained in two experiments performed at Jefferson Lab: EG4 on polarized protons and deuterons, and E971

Externí odkaz: http://arxiv.org/abs/2107.08133

Probing nucleon's spin structures with polarized Drell-Yan in the Fermilab SpinQuest experiment

Autor: Chen, Andrew, Peng, J. C., Leung, H., Tian, M., Makins, N., Brooks, M., Klein, A., Kleinjan, D., Liu, K., McCumber, M., McGaughey, P., Miraal-Martinez, J., Da Silva, C., Uemura, Sho, Jen, M., Li, X., Arrington, J., Geesaman, D., Reimer, P. E., Brown, C., Tesarek, R. J., Sawada, S., Lorenzon, W., Raymond, R., Slifer, K., Ruth, D., Goto, Y., Nakano, K., Shibata, T. -A., Crabb, D., Day, D., Keller, D., Rondon, O., Akbar, Z., Dodge, G., Bueltmann, S., Dunne, J., Dutta, D., Fassi, L. El, Jiang, H., Kinney, E., Doshita, N., Iwata, T., Miyachi, Y., Daugherity, M., Isenhower, D., Towell, R., Watson, S., Rowlands, N., Ngenzi, Y., Pate, S., Papavassiliou, V., Yu, H., Hossain, F.

Although the proton was discovered about 100 years ago, its spin structure still remains a mystery. Recent studies suggest that the orbital angular momentum of sea quarks could significantly contribute to the proton's spin. The SeaQuest experiment, w

Externí odkaz: http://arxiv.org/abs/1901.09994

Measurement of Target and Double-spin Asymmetries for the $\vec e\vec p\to e\pi^+ (n)$ Reaction in the Nucleon Resonance Region at Low $Q^2$

Autor: Zheng, X., Adhikari, K. P., Bosted, P., Deur, A., Drozdov, V., Fassi, L. El, Kang, Hyekoo, Kovacs, K., Kuhn, S., Long, E., Phillips, S. K., Ripani, M., Slifer, K., Smith, L. C., Adikaram, D., Akbar, Z., Amaryan, M. J., Pereira, S. Anefalos, Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Bültmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chen, J. -P., Chetry, T., Choi, Seonho, Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Djalali, C., Dodge, G. E., Dupre, R., Egiyan, H., Alaoui, A. El, Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovach, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hanretty, C., Harrison, N., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I . J . D., Markov, N., McKinnon, B., Mirazita, M., Mokeev, V., Movsisyan, A., Munevar, E., Camacho, C. Munoz, Murdoch, G., Nadel-Turonski, P., Net, L. A., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Pisano, S., Pogorelko, O., Price, J. W., Puckett, A. J. R., Raue, B. A., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J.

We report measurements of target- and double-spin asymmetries for the exclusive channel $\vec e\vec p\to e\pi^+ (n)$ in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extract

Externí odkaz: http://arxiv.org/abs/1607.03924

A search for baryon- and lepton-number violating decays of $\Lambda$ hyperons using the CLAS detector at Jefferson Laboratory

Autor: McCracken, M. E., Bellis, M., Adhikari, K. P., Adikaram, D., Akbar, Z., Pereira, S. Anefalos, Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Cao, T., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Colaneri, L., Cole, P. L., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dodge, G. E., Dupre, R., Alaoui, A. El, Fassi, L. El, Elouadrhiri, E., Eugenio, P., Fedotov, G., Fegan, S., Fersch, R., Filippi, A., Fleming, J. A., Garillon, B., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Mayer, M., McKinnon, B., Mestayer, M. D., Meyer, C. A., Mirazita, M., Mokeev, V., Moody, C. I., Moriya, K., Camacho, C. Munoz, Nadel-Turonski, P., Net, L. A., Niccolai, S., Osipenko, M., Ostrovidov, A. I., Park, K., Pasyuk, E., Pisano, S., Pogorelko, O., Price, J. W., Procureur, S., Prok, Y., Raue, B. A., Ripani, M., Rizzo, A., Rosner, G., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Seder, E., Sharabian, Y. G., Skorodumina, Iu., Sokhan, D., Sparveris, N., Stoler, P., Strakovsky, I. I., Strauch, S., Sytnik, V., Tian, Ye, Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Wood, M. H., Zachariou, N., Zana, L., Zhang, J., Zhao, Z. W., Zonta, I.

Publikováno v: Phys. Rev. D 92, 072002 (2015)

We present a search for ten baryon-number violating decay modes of $\Lambda$ hyperons using the CLAS detector at Jefferson Laboratory. Nine of these decay modes result in a single meson and single lepton in the final state ($\Lambda \rightarrow m \el

Externí odkaz: http://arxiv.org/abs/1507.03859

The CLAS12 Spectrometer at Jefferson Laboratory

Autor: Burkert, V.D., Elouadrhiri, L., Adhikari, K.P., Adhikari, S., Amaryan, M.J., Anderson, D., Angelini, G., Antonioli, M., Atac, H., Aune, S., Avakian, H., Gayoso, C. Ayerbe, Baltzell, N., Barion, L., Battaglieri, M., Baturin, V., Bedlinskiy, I., Benmokhtar, F., Bianconi, A., Biselli, A.S., Bonneau, P., Bossù, F., Boyarinov, S., Briscoe, W.J., Brooks, W.K., Bruhwel, K., Carman, D.S., Celentano, A., Charles, G., Chatagnon, P., Chetry, T., Christiaens, G., Christo, S., Ciullo, G., Clary, B.A., Cole, P.L., Contalbrigo, M., Cook, M., Crede, V., Cruz-Torres, R., Cuevas, C., D’Angelo, A., Dashyan, N., Defurne, M., Deur, A., De Vita, R., Diehl, S., Djalali, C., Dodge, G., Dupre, R., Ehrhart, M., El Fassi, L., Eng, B., Ewing, T., Fair, R., Fedotov, G., Filippi, A., Forest, T.A., Garçon, M., Gavalian, G., Ghoshal, P., Gilfoyle, G.P., Giovanetti, K., Girod, F.X., Glazier, D.I., Golovatch, E., Gothe, R.W., Gotra, Y., Griffioen, K.A., Guidal, M., Gyurjyan, V., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Hauenstein, F., Hayward, T.B., Heddle, D., Hemler, P., Hen, O.A., Hicks, K., Hobart, A., Hogan, J., Holtrop, M., Ilieva, Y., Illari, I., Insley, D., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jacobs, G., Jo, H.S., Johnston, R., Joo, K., Joosten, S., Kageya, T., Kashy, D., Keith, C., Keller, D., Khachatryan, M., Khanal, A., Kim, A., Kim, C.W., Kim, W., Kubarovsky, V., Kuhn, S.E., Lanza, L., Leffel, M., Lucherini, V., Lung, A., Kabir, M.L., Leali, M., Lee, S., Lenisa, P., Livingston, K., Lowry, M., MacGregor, I.J.D., Mandjavidze, I., Marchand, D., Markov, N., Mascagna, V., McKinnon, B., McMullen, M., Mealer, C., Mestayer, M.D., Meziani, Z.E., Miller, R., Milner, R.G., Mineeva, T., Mirazita, M., Mokeev, V., Moran, P., Movsisyan, A., Camacho, C. Munoz, Naidoo, P., Nanda, S., Newton, J., Niccolai, S., Niculescu, G., Osipenko, M., Paolone, M., Pappalardo, L.L., Paremuzyan, R., Pastor, O., Pasyuk, E., Phelps, W., Pogorelko, O., Poudel, J., Price, J.W., Price, K., Procureur, S., Prok, Y., Protopopescu, D., Rajput-Ghoshal, R., Raue, B.A., Raydo, B., Ripani, M., Ritman, J., Rizzo, A., Rosner, G., Rossi, P., Rowley, J., Roy, B.J., Sabatié, F., Salgado, C., Schadmand, S., Schmidt, A., Segarra, E.P., Sergeyeva, V., Sharabian, Y.G., Shrestha, U., Skorodumina, Iu., Smith, G.D., Smith, L.C., Sokhan, D., Soto, O., N.Sparveris, Stepanyan, S., Stoler, P., Strauch, S., Tan, J.A., Taylor, M., Tilles, D., Turisini, M., Tyler, N., Ungaro, M., Venturelli, L., Voskanyan, H., Voutier, E., Watts, D., Wei, X., Weinstein, L.B., Wiggins, C., Wiseman, M., Wood, M.H., Yegneswaran, A., Young, G., Zachariou, N., Zarecky, M., Zhang, J., Zhao, Z.W., Ziegler, V.

Publikováno v: In Nuclear Inst. and Methods in Physics Research, A 11 April 2020 959