Measurement of the longitudinal spin transfer to Lambda and (Lambda)over-bar hyperons in polarised muon DIS
Articolo
Data di Pubblicazione:
2009
Abstract:
The longitudinal polarisation transfer from muons to Lambda and (Lambda) over bar hyperons, D-LL(Lambda(Lambda) over bar), has been studied in deep-inelastic scattering off an unpolarised isoscalar target at the COMPASS experiment at CERN. The spin transfers to Lambda and (Lambda) over bar produced in the current fragmentation region exhibit different behaviours as a function of x and x(F). The measured x and xF dependences of D-LL(Lambda) are compatible with zero, while D-LL((Lambda) over bar) tends to increase with x(F), reaching values of 0.4-0.5. The resulting average values are D-LL(Lambda) = -0.012 +/- 0.047 +/- 0.024 and D-LL((Lambda) over bar) = 0.249 +/- 0.056 +/- 0.049. These results are discussed in the frame of recent model calculations.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
CHARGED-CURRENT INTERACTIONS; STRANGE PARTICLE-PRODUCTION; NOMAD EXPERIMENT; DEEP; SCATTERING; NUCLEON; ASYMMETRY; FRAGMENTATION; NEUTRINO; DECAYS
Elenco autori:
Alekseev M;
Alexakhin VY;
Alexandrov Y;
Alexeev GD;
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 MP;
Chapiro A;
Chiosso M;
Chung SU;
Cicuttin A;
Colantoni M;
Crespo ML;
Dalla Torre S;
Dafni T;
Das S;
Dasgupta SS;
Denisov OY;
Dhara L;
Diaz V;
Dinkelbach AM;
Donskov SV;
Doshita N;
Duic V;
Dunnweber W;
Efremov A;
Eversheim PD;
Eyrich W;
Faessler M;
Ferrero A;
Finger M;
Finger M;
Fischer H;
Franco C;
Friedrich JM;
Garfagnini R;
Gautheron F;
Gavrichtchouk OP;
Gazda R;
Gerassimov S;
Geyer R;
Giorgi M;
Gobbo B;
Goertz S;
Grabmuller S;
Grajek OA;
Grasso A;
Grube B;
Gushterski R;
Guskov A;
Haas F;
von Harrach D;
Hasegawa T;
Heckmann J;
Heinsius FH;
Hermann M;
Hermann R;
Herrmann F;
Hess C;
Hinterberger F;
Horikawa N;
Hoppner C;
d'Hose N;
Ilgner C;
Ishimoto S;
Ivanov O;
Ivanshin Y;
Iven B;
Iwata T;
Jahn R;
Jasinski P;
Jegou G;
Joosten R;
Kabuss E;
Kang D;
Ketzer B;
Khaustov GV;
Khokhlov YA;
Kisselev Y;
Klein F;
Klimaszewski K;
Koblitz S;
Koivuniemi JH;
Kolosov VN;
Komissarov EV;
Kondo K;
Konigsmann K;
Konopka R;
Konorov I;
Konstantinov VF;
Korzenev A;
Kotzinian AM;
Kouznetsov O;
Kowalik K;
Kramer M;
Kral A;
Kroumchtein ZV;
Kuhn R;
Kunne F;
Kurek K;
Le Goff JM;
Lednev AA;
Lehmann A;
Levorato S;
Lichtenstadt J;
Liska T;
Maggiora A;
Maggiora M;
Magnon A;
Mallot GK;
Mann A;
Marchand C;
Marroncle J;
Martin A;
Marzec J;
Massmann F;
Matsuda T;
Maximov AN;
Meyer W;
Michigami T;
Mikhailov YV;
Moinester MA;
Mutter A;
Nagaytsev A;
Nagel T;
Nassalski J;
Negrini S;
Nerling F;
Neubert S;
Neyret D;
Nikolaenko VI;
Olshevsky AG;
Ostrick M;
Padee A;
Panknin R;
Panzieri D;
Parsamyan B;
Paul S;
Pawlukiewicz-Kaminska B;
Perevalova E;
Pesaro G;
Peshekhonov DV;
Piragino G;
Platchkov S;
Pochodzalla J;
Polak J;
Polyakov VA;
Pontecorvo G;
Pretz J;
Quintans C;
Rajotte JF;
Ramos S;
Rapatsky V;
Reicherz G;
Reggiani D;
Richter A;
Robinet F;
Rocco E;
Rondio E;
Ryabchikov DI;
Samoylenko VD;
Sandacz A;
Santos H;
Sapozhnikov MG;
Sarkar S;
Sbrizzai G;
Schiavon P;
Schill C;
Schmitt L;
Schroder W;
Shevchenko OY;
Siebert HW;
Silva L;
Sinha L;
Sissakian AN;
Slunecka M;
Smirnov GI;
Sosio S;
Sozzi F;
Srnka A;
Stolarski M;
Sulc M;
Sulej R;
Takekawa S;
Tessaro S;
Tessarotto F;
Teufel A;
Tkatchev LG;
Venugopal G;
Virius M;
Vlassov NV;
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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