Search for the NN → 6q phase transition in the np-polarized measurements at Tkin= 1–6 GeV

Autor: Strunov, L. N., Antonenko, V. G., Borzakov, S. B., Borzunov, Yu. T., Chernykh, E. V., Chumakov, V. F., Ivanshin, Yu. I., Dolgii, S. A., Finger, M., Finger, M., Golovanov, L.B., Guriev, D. K., Janata, A., Kovalenko, A. D., Krasnov, V. A., Kuzmin, N. A., Livanov, A. N., Maniakov, P. K., Matyushevsky, E. A., Morozov, A.A, Nikolaevsky, G. P., Nomofilov, A. A., Panteleev, Tz., Pisarev, I. L., Polunin, Yu. P., Prokofiev, A. N., Prytkov, V. Yu., Rukoyatkin, P. A., Sharov, V. I., Shindin, R. A., Slunečka, M., Slunečková, V., Starikov, A. Yu., Vasiliev, T. A., Yudin, I. P., Zaitsev, I. V., Zhdanov, A. A., Zhmyrov, V. N., Strunov, L. N., Antonenko, V. G., Borzakov, S. B., Borzunov, Yu. T., Chernykh, E. V., Chumakov, V. F., Ivanshin, Yu. I., Dolgii, S. A., Finger, M., Finger, M., Golovanov, L.B., Guriev, D. K., Janata, A., Kovalenko, A. D., Krasnov, V. A., Kuzmin, N. A., Livanov, A. N., Maniakov, P. K., Matyushevsky, E. A., Morozov, A.A, Nikolaevsky, G. P., Nomofilov, A. A., Panteleev, Tz., Pisarev, I. L., Polunin, Yu. P., Prokofiev, A. N., Prytkov, V. Yu., Rukoyatkin, P. A., Sharov, V. I., Shindin, R. A., Slunečka, M., Slunečková, V., Starikov, A. Yu., Vasiliev, T. A., Yudin, I. P., Zaitsev, I. V., Zhdanov, A. A., Zhmyrov, V. N.
Zdroj: European Physical Journal Special Topics; August 2008, Vol. 162 Issue: 1 p125-132, 8p
Abstrakt: The measurements of np-spin observables at $0^\circ$have been performed for the first time on the Delta-Sigma experimental facility of LHE JINR up to Pn=4.5 GeV/c using the monochromatic neutron beam. They include detailed measurements of the $\Delta\sigma_{\rm L}(np)$spin differences and the study of the $np\to pn$elastic charge-exchange process. In the $\Delta\sigma_{\rm L}(np)$and $-\Delta\sigma_{\rm L}({\rm I}=0)$energy dependencies over the energy region T$_{\rm kin}=1.2$–3.7 GeV the peculiarity at 1.8 GeV was observed. Such energy behavior was predicted by the QCD approach as a signal of the $NN\!\to 6q$phase transition. For the exhaustive investigation of this effect it is necessary to measure the energy dependence of the complete set of npobservables with both longitudinal (L) and transverse (T) polarizations of the neutron beam and proton target. This will allow Direct Reconstruction of all three NNforward Scattering Amplitudes (DRSA) to be performed, and the observed peculiarity to be checked around T$_{\rm kin}=1.8$GeV and at the higher energies using the Argand diagrams method.
Databáze: Supplemental Index
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