Measurement of the two-photon exchange contribution to the elastic $e^{\pm}p$ scattering cross sections at the VEPP-3 storage ring

Autor: Rachek, I. A., Arrington, J., Dmitriev, V. F., Gauzshtein, V. V., Gerasimov, R. E., Gramolin, A. V., Holt, R. J., Kaminskiy, V. V., Lazarenko, B. A., Mishnev, S. I., Muchnoi, N. Yu., Neufeld, V. V., Nikolenko, D. M., Sadykov, R. Sh., Shestakov, Yu. V., Stibunov, V. N., Toporkov, D. K., de Vries, H., Zevakov, S. A., Zhilich, V. N.

Publikováno v: Phys. Rev. Lett. 114, 062005 (2015)

The ratio of the elastic $e^+ p$ to $e^- p$ scattering cross sections has been measured precisely, allowing the determination of the two-photon exchange contribution to these processes. This neglected contribution is believed to be the cause of the d

Externí odkaz: http://arxiv.org/abs/1411.7372

Measurements of the Electric Form Factor of the Neutron up to Q2=3.4 GeV2 using the Reaction He3(e,e'n)pp

Autor: Riordan, S., Abrahamyan, S., Craver, B., Kelleher, A., Kolarkar, A., Miller, J., Cates, G. D., Liyanage, N., Wojtsekhowski, B., Acha, A., Allada, K., Anderson, B., Aniol, K. A., Annand, J. R. M., Arrington, J., Averett, T., Beck, A., Bellis, M., Boeglin, W., Breuer, H., Calarco, J. R., Camsonne, A., Chen, J. P., Chudakov, E., Coman, L., Crowe, B., Cusanno, F., Day, D., Degtyarenko, P., Dolph, P. A. M., Dutta, C., Ferdi, C., Fernandez-Ramirez, C., Feuerbach, R., Fraile, L. M., Franklin, G., Frullani, S., Fuchs, S., Garibaldi, F., Gevorgyan, N., Gilman, R., Glamazdin, A., Gomez, J., Grimm, K., Hansen, J. O., Herraiz, J. L., Higinbotham, D. W., Holmes, R., Holmstrom, T., Howell, D., deJager, C. W., Jiang, X., Jones, M. K., Katich, J., Kaufman, L. J., Khandaker, M., Kelly, J. J., Kiselev, D., Korsch, W., LeRose, J., Lindgren, R., Markowitz, P., Margaziotis, D. J., Beck, S. May-Tal, Mayilyan, S., McCormick, K., Meziani, Z. E., Michaels, R., Moffit, B., Nanda, S., Nelyubin, V., Ngo, T., Nikolenko, D. M., Norum, B., Pentchev, L., Perdrisat, C. F., Piasetzky, E., Pomatsalyuk, R., Protopopescu, D., Puckett, A. J. R., Punjabi, V. A., Qian, X., Qiang, Y., Quinn, B., Rachek, I., Ransome, R. D., Reimer, P. E., Reitz, B., Roche, J., Ron, G., Rondon, O., Rosner, G., Saha, A., Sargsian, M., Sawatzky, B., Segal, J., Shabestari, M., Shahinyan, A., Shestakov, Yu., Singh, J., Sirca, S., Souder, P., Stepanyan, S., Stibunov, V., Sulkosky, V., Tajima, S., Tobias, W. A., Udias, J. M., Urciuoli, G. M., Vlahovic, B., Voskanyan, H., Wang, K., Wesselmann, F. R., Vignote, J. R., Wood, S. A., Wright, J., Yao, H., Zhu, X.

Publikováno v: Phys.Rev.Lett.105:262302,2010

The electric form factor of the neutron was determined from studies of the reaction He3(e,e'n)pp in quasi-elastic kinematics in Hall A at Jefferson Lab. Longitudinally polarized electrons were scattered off a polarized target in which the nuclear pol

Externí odkaz: http://arxiv.org/abs/1008.1738

Incoherent pion photoproduction on the deuteron in the first resonance region

Autor: Levchuk, M. I., Loginov, A. Yu., Sidorov, A. A., Stibunov, V. N., Schumacher, M.

Publikováno v: Phys.Rev. C74 (2006) 014004

Incoherent pion photoproduction on the deuteron is studied in the first resonance region. The unpolarized cross section, the beam asymmetry, and the vector and tensor target asymmetries are calculated in the framework of a diagrammatic approach. Pole

Externí odkaz: http://arxiv.org/abs/nucl-th/0607020

Tensor analyzing powers in forward angle exclusive $\pi$-meson photoproduction on deuteron

Autor: Loginov, A. Yu., Osipov, A. V., Sidorov, A. A., Stibunov, V. N.

The target tensor analyzing powers of the process $\gamma d -> \pi^{-}pp$ had been studied in the plane wave impulse approximation, if both ejected protons are detected in coincidence and in the directions, symmetrical respect to the incoming photon

Externí odkaz: http://arxiv.org/abs/nucl-th/0407045

Reduction of the Bethe-Salpeter equation for the scattering amplitude of the particles with spin 1 to system of the integral equations for invariant functions

Autor: Loginov, A. Yu., Stibunov, V. N.

Publikováno v: Phys.Atom.Nucl. 67 (2004) 856-871; Yad.Fiz. 67 (2004) 878-893

Bethe-Salpeter equation for the massive particles with spin 1 is considered. The scattering amplitude decomposition of the particles with spin 1 by relativistic tensors is derived. The transformation coefficients from helicity amplitudes to invariant

Externí odkaz: http://arxiv.org/abs/hep-th/0212078