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Measurement of the Longitudinal Spin Transfer to Lambda and Anti-Lambda Hyperons in Polarised Muon DIS (2009) |
- Alekseev, M,
- Alexakhin, V Yu,
- Alexandrov, Yu,
- Alexeev, G D,
- Amoroso, A,
- Austregesilo, A,
- Badelek, B,
- Balestra, F,
- Ball, J,
- Barth, J,
- Baum, G,
- Bedfer, Y,
- Bernhard, J,
- Bertini, R,
- Bettinelli, M,
- Birsa, R,
- Bisplinghoff, J,
- Bordalo, P,
- Bradamante, F,
- Bravar, A,
- Bressan, A,
- Brona, G,
- Burtin, E,
- Bussa, M P,
- Chapiro, A,
- Chiosso, M,
- Chung, S U,
- Cicuttin, A,
- Colantoni, M,
- Crespo, M L,
- Dalla Torre, S,
- Dafni, T,
- Das, S,
- Das-Gupta, S S,
- Denisov, O Yu,
- Dhara, L,
- Díaz, V,
- Dinkelbach, A M,
- Donskov, S V,
- Doshita, N,
- Duic, V,
- Dünnweber, W,
- Efremov, A,
- Eversheim, P D,
- Eyrich, W,
- Faessler, M,
- Ferrero, A,
- Finger, M,
- Finger, M,
- Fischer, H,
- Franco, C,
- Friedrich, J M,
- Garfagnini, R,
- Gautheron, F,
- Gavrichtchouk, O P,
- Gazda, R,
- Gerassimov, S,
- Geyer, R,
- Giorgi, M,
- Gobbo, B,
- Görtz, S,
- Grabmüller, S,
- Grajek, O A,
- Grasso, A,
- Grube, B,
- Gushterski, R,
- Guskov, A,
- Haas, F,
- Von Harrach, D,
- Hasegawa, T,
- Heckmann, J,
- Heinsius, F H,
- Hermann, M,
- Hermann, R,
- Herrmann, F,
- Hess, C,
- Hinterberger, F,
- Horikawa, N,
- Höppner, C,
- D'Hose, N,
- Ilgner, C,
- Ishimoto, S,
- Ivanov, O,
- Ivanshin, Yu,
- Iven, B,
- Iwata, T,
- Jahn, R,
- Jasinski, P,
- Jegou, G,
- Joosten, R,
- Kabu, E,
- Kang, D,
- Ketzer, B,
- Khaustov, G V,
- Khokhlov, Yu A,
- Kisselev, Yu,
- Klein, F,
- Klimaszewski, K,
- Koblitz, S,
- Koivuniemi, J H,
- Kolosov, V N,
- Komissarov, E V,
- Kondo, K,
- Königsmann, K C,
- Konopka, R,
- Konorov, I,
- Konstantinov, V F,
- Korzenev, A,
- Kotzinian, A M,
- Kuznetsov, O,
- Kowalik, K,
- Krämer, M,
- Kral, A,
- Kroumchtein, Z V,
- Kühn, R,
- Kunne, F,
- Kurek, K,
- Le Goff, J M,
- Lednev, A A,
- Lehmann, A,
- Levorato, S,
- Lichtenstadt, J,
- Liska, T,
- Maggiora, A,
- Maggiora, M,
- Magnon, A,
- Mallot, G K,
- Mann, A,
- Marchand, C,
- Marroncle, J,
- Martin, A,
- Marzec, J,
- Massmann, F,
- Matsuda, T,
- Maximov, A N,
- Meyer, W,
- Michigami, T,
- Mikhailov, Yu V,
- Moinester, M A,
- Mutter, A,
- Nagaytsev, A,
- Nagel, T,
- Nassalski, J,
- Negrini, S,
- Nerling, F,
- Neubert, S,
- Neyret, D,
- Nikolaenko, V I,
- Olshevskii, A G,
- Ostrick, M,
- Padee, A,
- Panknin, R,
- Panzieri, D,
- Parsamyan, B,
- Paul, S,
- Pawlukiewicz-Kaminska, B,
- Perevalova, E,
- Pesaro, G,
- Peshekhonov, D V,
- Piragino, G,
- Platchkov, S,
- Pochodzalla, J,
- Polak, J,
- Polyakov, V A,
- Pontecorvo, G,
- Pretz, J,
- Quintans, C,
- Rajotte, J F,
- Ramos, S,
- Rapatsky, V,
- Reicherz, G,
- Reggiani, D,
- Richter, A,
- Robinet, F,
- Rocco, E,
- Rondio, E,
- Ryabchikov, D I,
- Samoylenko, V D,
- Sandacz, A,
- Santos, H,
- Sapozhnikov, M G,
- Sarkar, S,
- Sbrizzai, G,
- Schiavon, P,
- Schill, C,
- Schmitt, L,
- Schröder, W,
- Shevchenko, O Yu,
- Siebert, H W,
- Silva, L,
- Sinha, L,
- Sissakian, A N,
- Slunecka, M,
- Smirnov, G I,
- Sosio, S,
- Sozzi, F,
- Srnka, A,
- Stolarski, M,
- Sulc, M,
- Sulej, R,
- Takekawa, S,
- Tessaro, S,
- Tessarotto, F,
- Teufel, A,
- Tkatchev, L G,
- Venugopal, G,
- Virius, M,
- Vlassov, N V,
- Vossen, A,
- Weitzel, Q,
- Windmolders, R,
- Wislicki, W,
- Wollny, H,
- Zaremba, K,
- Zemlyanichkina, E,
- Ziembicki, M,
- Zhao, J,
- Zhuravlev, N,
- Zvyagin, A
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Abstract |
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The longitudinal polarisation transfer from muons to lambda and anti-lambda hyperons, D_LL, has been studied in deep inelastic scattering off an unpolarised isoscalar target at the COMPASS experiment at CERN. The spin transfers to lambda and anti-lambda produced in the current fragmentation region exhibit different behaviours as a function of x and xF . The measured x and xF dependences of D^lambda_LL are compatible with zero, while D^anti-lambda_LL tends to increase with xF, reaching values of 0.4 - 0.5. The resulting average values are D^lambda_LL = -0.012 +- 0.047 +- 0.024 and D^anti-lambda_LL = 0.249 +- 0.056 +- 0.049. These results are discussed in the frame of recent model calculations. |
Details der Publikation |
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