Measurement of the longitudinal spin transfer to Lambda and (Lambda)over-bar hyperons in polarised muon DIS RID D-4627-2011
- 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
- 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.
- PANZIERI, Daniele
Publication date
January 2009
DOI Publisher
Springer Science and Business Media LLCAbstract
The longitudinal polarisation transfer from muons to Λ and Λ¯ hyperons, DΛ(Λ¯)LL , has been studied in deep-inelastic scattering off an unpolarised isoscalar target at the COMPASS experiment at CERN. The spin transfers to Λ and Λ¯ produced in the current fragmentation region exhibit different behaviours as a function of x and x F . The measured x and x F dependences of D LL Λ are compatible with zero, while DΛ¯LL tends to increase with x F , reaching values of 0.4–0.5. The resulting average values are D LL Λ = −0.012±0.047±0.024 and DΛ¯LL = 0.249±0.056±0.049. These results are discussed in the frame of recent model calculations
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