Excitation of the Delta(1232) isobar in deuteron charge exchange on hydrogen at 1.6, 1.8,  and 2.3  GeV

Mchedlishvili, D.; Barsov, S.; Carbonell, J.C.; Dymov, S.; Dzyuba, A.; Engels, R.; Gebel, R.; Glagolev, V.; Grigorieyv, K.; Goslawski, P.; Hartmann, M.; Imambekov, O.; Kacharava, A.; Kamerdzhiev, V.; Keshelashvili, I.; Koukaz, A.; Komarov, V.; Kulessa, P.; Kulikov, A.; Lehrach, A.; Lomidze, N.; Lorentz, B.; Macharashvili, G.; Maier, R.; Merzlyakov, S.; Mielke, M.; Mikirtychyants, M.; Mikirtychyants, S.; Nioradze, M.; Ohm, H.; Papenbrock, M.; Prashun, D.; Rathmann, F.; Serdyuk, V.; Seyfarth, H.; Stein, H.J.; Steffens, E.; Stockhorst, H.; Stroeher, H.; Tabidze, M.; Trusov, S.; Uzikov, Y.; Valdau, Y.; Wilkin, C.

Авторы: Mchedlishvili D., Barsov S., Carbonell J.Chiladze D, Dymov S., Dzyuba A., Engels R., Gebel R., Glagolev V., Grigorieyv K., Goslawski P., Hartmann M., Imambekov O., Kacharava A., Kamerdzhiev V., Keshelashvili I., Koukaz A., Komarov V., Kulessa P., Kulikov A., Lehrach A., Lomidze N., Lorentz B., Macharashvili G., Maier R., Merzlyakov S., Mielke M., Mikirtychyants M., Mikirtychyants S., Nioradze M., Ohm H., Papenbrock M., Prashun D., Rathmann F., Serdyuk V., Seyfarth H., Stein H.J., Steffens E., Stockhorst H., Stroeher H., Tabidze M., Trusov S., Uzikov Yu, Valdau Yu, Wilkin C.
Журнал: Physics Letters B
Том: 726
Год издания: 2013
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 145
Последняя страница: 150
DOI: 10.1016/j.physletb.2013.08.018
Аннотация: The charge-exchange break-up of polarized deuterons {\vec d}p-> (pp)_sn, where the final diproton system has a very low excitation energy and hence is mainly in the 1S0 state, is powerful tool to probe the spin-flip terms in the proton-neuteron charge-exchange scattering. Recent measurements with the ANKE spectrometer at the COSY storage ring at 1.6, 1.8 and 2.3 GeV have extended these studies into the pion production regime in order to investigate the mechanism for the excitation of the Delta(1232) isobar in the {\vec d}p-> (pp)_sX reaction. Values of the differential cross section and two deuteron tensor analyzing powers, A_xx and A_yy, have been extracted as functions of the momentum transfer to the diproton or the invariant mass M_X of the unobsorved system X. The unpolarized cross section in the high M_X region is well described in a model that includes only direct excitation of the Delta isobar through undistorted one pion exchange. However, the cross section is grossly underestimated for low M_X, even when Delta excitation in the projectile deuteron ins included into the calculation. Furthermore, direct Delta production through one pion exchange only reproduces the angular dependence of the difference between the two tensor analyzing powers.
Добавил в систему: Узиков Юрий Николаевич

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Excitation of the Delta(1232) isobar in deuteron charge exchange on hydrogen at 1.6, 1.8, and 2.3 GeVстатья

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