The Hermes experiment has investigated the tensor spin structure of the deuteron using the 27.6 GeV/c positron beam of DESY HERA. The use of a tensor-polarized deuteron gas target with only a negligible residual vector polarization enabled the first measurement of the tensor asymmetry A(zz)(d) and the tensor structure function b(1)(d) for average values of the Bjorken variable 0.01 << x >< 0.45 and of the negative of the squared four-momentum transfer 0.5 GeV2<< Q(2)>< 5 GeV2. The quantities A(zz)(d) and b(1)(d) are found to be nonzero. The rise of b(1)(d) for decreasing values of x can be interpreted to originate from the same mechanism that leads to nuclear shadowing in unpolarized scattering.

Measurement of the tensor structure function b(1) of the deuteron

CIULLO, Giuseppe;CONTALBRIGO, Marco;FERRETTI, Paola;LENISA, Paolo;MASOLI, Francesco Antonio;REGGIANI, DAVIDE;STANCARI, Michelle Dawn;STATERA, Marco;
2005

Abstract

The Hermes experiment has investigated the tensor spin structure of the deuteron using the 27.6 GeV/c positron beam of DESY HERA. The use of a tensor-polarized deuteron gas target with only a negligible residual vector polarization enabled the first measurement of the tensor asymmetry A(zz)(d) and the tensor structure function b(1)(d) for average values of the Bjorken variable 0.01 << x >< 0.45 and of the negative of the squared four-momentum transfer 0.5 GeV2<< Q(2)>< 5 GeV2. The quantities A(zz)(d) and b(1)(d) are found to be nonzero. The rise of b(1)(d) for decreasing values of x can be interpreted to originate from the same mechanism that leads to nuclear shadowing in unpolarized scattering.
2005
Airapetian, A.; Akopov, N.; Akopov, Z; Amarian, M; Ammosov, Vv; Andrus, A; Aschenauer, Ec; Augustyniak, W; Avakian, R; Avetissian, A; Avetissian, E; Bailey, P; Balin, D; Baturin, V; Beckmann, M; Belostotski, S; Bernreuther, S; Bianchi, N; Blok, Hp; Bottcher, H; Borissov, A; Borysenko, A; Bouwhuis, M; Brack, J; Brull, A; Bryzgalov, V; Capitani, Gp; Chen, T; Chiang, Hc; Ciullo, Giuseppe; Contalbrigo, Marco; Ferretti, Paola; Leo, Rd; Demey, M; Nardo, Ld; Sanctis, Ed; Devitsin, E; Nezza, Pd; Dreschler, J; Duren, M; Ehrenfried, M; ELALAOUI MOULAY, A; Elbakian, G; Ellinghaus, F; Elschenbroich, U; Fabbri, R; Fantoni, A; Fechtchenko, A; Felawka, L; Fox, B; Frullani, S; Gapienko, G; Gapienko, V; Garibaldi, F; Garrow, K; Garutti, E; Gaskell, D; Gavrilov, G; Gharibyan, V; Graw, G; Grebeniouk, O; Greeniaus, Lg; Gregor, Im; Hafidi, K; Hartig, M; Hasch, D; Heesbeen, D; Henoch, M; Hertenberger, R; Hesselink, Wha; Hillenbrand, A; Hoek, M; Holler, Y; Hommez, B; Iarygin, G; Ivanilov, A; Izotov, A; Jackson, He; Jgoun, A; Kaiser, R; Kinney, E; Kisselev, A; Kopytin, M; Korotkov, V; Kozlov, V; Krauss, B; Krivokhijine, Vg; Lagamba, L; Lapikas, L; Laziev, A; Lenisa, Paolo; Liebing, P; LINDEN LEVY, La; Lipka, K; Lorenzon, W; Lu, H; Lu, J; Lu, S; Ma, Bq; Maiheu, B; Makins, Ncr; Mao, Y; Marianski, B; Marukyan, H; Masoli, Francesco Antonio; Mexner, V; Meyners, N; Mikloukho, O; Miller, Ca; Miyachi, Y; Muccifora, V; Nagaitsev, A; Nappi, E; Naryshkin, Y; Nass, A; Negodaev, M; Nowak, Wd; Oganessyan, K; Ohsuga, H; Pickert, N; Potashov, S; Potterveld, Dh; Raithel, M; Reggiani, Davide; Reimer, Pe; Reischl, A; Reolon, Ar; Riedl, C; Rith, K; Rosner, G; Rostomyan, A; Rubacek, L; Rubin, J; Ryckbosch, D; Salomatin, Y; Sanjiev, I; Savin, I; Schafer, A; Schill, C; Schnell, G; Schuler, Kp; Seele, J; Seidl, R; Seitz, B; Shanidze, R; Shearer, C; Shibata, Ta; Shutov, V; Simani, Mc; Sinram, K; Stancari, Michelle Dawn; Statera, Marco; Steffens, E; Steijger, Jjm; Stenzel, H; Stewart, J; Stinzing, F; Stosslein, U; Tait, P; Tanaka, H; Taroian, S; Tchuiko, B; Terkulov, A; Tkabladze, A; Trzcinski, A; Tytgat, M; Vandenbroucke, A; VAN DER NAT, Pb; VAN DER STEENHOVEN, G; Vetterli, Mc; Vikhrov, V; Vincter, Mg; Vogel, C; Vogt, M; Volmer, J; Weiskopf, C; Wendland, J.; Wilbert, J.; Ye, Y.; Ye, Z.; Yen, S.; Zihlmann, B.; Zupranski, P.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/517184
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