A measurement of $\Lambda$ polarization in inclusive production by $\Sigma^{-}$ of 340 GeV/c in C and Cu targets
M.I. Adamovich
,
Yu.A. Alexandrov
,
S.P. Baranov
,
D. Barberis
,
M. Beck
,
C. Berat
(1)
,
W. Beusch
,
M. Boss
,
S. Brons
,
W. Brueckner
,
M. Buenerd
(1)
,
C. Busch
,
C. Buescher
,
F. Charignon
(1)
,
J. Chauvin
(1)
,
E.A. Chudakov
,
U. Dersch
,
F. Dropmann
,
J. Engelfried
,
F. Faller
,
A. Fournier
(1)
,
S.G. Gerassimov
,
M. Godbersen
,
P. Grafstroem
,
T. Haller
,
M. Heidrich
,
E. Hubbard
,
R.B. Hurst
,
K. Koenigsmann
,
I. Konorov
,
N. Keller
,
K. Martens
,
P. Martin
(1)
,
S. Masciocchi
,
R. Michaels
,
U. Mueller
,
H. Neeb
,
D. Newbold
,
C. Newsom
,
S. Paul
,
J. Pochodzalla
,
I. Potashnikova
,
B. Povh
,
R.D. Ransome
,
Zhuoxiang Ren
,
M. Rey-Campagnolle
(1)
,
G. Rosner
,
L. Rossi
,
H. Rudolph
,
C. Scheel
,
L. Schmitt
,
H.W. Siebert
,
A. Simon
,
V.J. Smith
,
O. Thilmann
,
A. Trombini
,
E. Vesin
(1)
,
B. Volkemer
,
K. Vorwalter
,
T. Waelcher
,
G. Waelder
,
R. Werding
,
E. Wittmann
,
M.V. Zavertyaev
M.I. Adamovich
- Function : Author
Yu.A. Alexandrov
- Function : Author
S.P. Baranov
- Function : Author
D. Barberis
- Function : Author
M. Beck
- Function : Author
C. Berat
- Function : Author
- PersonId : 739578
- IdHAL : corinne-berat
- ORCID : 0000-0001-8294-6294
- IdRef : 033505187
W. Beusch
- Function : Author
M. Boss
- Function : Author
S. Brons
- Function : Author
W. Brueckner
- Function : Author
C. Busch
- Function : Author
C. Buescher
- Function : Author
E.A. Chudakov
- Function : Author
U. Dersch
- Function : Author
F. Dropmann
- Function : Author
J. Engelfried
- Function : Author
F. Faller
- Function : Author
S.G. Gerassimov
- Function : Author
M. Godbersen
- Function : Author
P. Grafstroem
- Function : Author
T. Haller
- Function : Author
M. Heidrich
- Function : Author
E. Hubbard
- Function : Author
R.B. Hurst
- Function : Author
K. Koenigsmann
- Function : Author
I. Konorov
- Function : Author
N. Keller
- Function : Author
K. Martens
- Function : Author
S. Masciocchi
- Function : Author
R. Michaels
- Function : Author
U. Mueller
- Function : Author
H. Neeb
- Function : Author
D. Newbold
- Function : Author
C. Newsom
- Function : Author
S. Paul
- Function : Author
J. Pochodzalla
- Function : Author
I. Potashnikova
- Function : Author
B. Povh
- Function : Author
R.D. Ransome
- Function : Author
Zhuoxiang Ren
- Function : Author
G. Rosner
- Function : Author
L. Rossi
- Function : Author
H. Rudolph
- Function : Author
C. Scheel
- Function : Author
L. Schmitt
- Function : Author
H.W. Siebert
- Function : Author
A. Simon
- Function : Author
- PersonId : 755233
- ORCID : 0000-0003-4641-6186
- IdRef : 177556099
V.J. Smith
- Function : Author
O. Thilmann
- Function : Author
A. Trombini
- Function : Author
B. Volkemer
- Function : Author
K. Vorwalter
- Function : Author
T. Waelcher
- Function : Author
G. Waelder
- Function : Author
R. Werding
- Function : Author
E. Wittmann
- Function : Author
M.V. Zavertyaev
- Function : Author
Abstract
We have measured the polarization of Λ\LambdaΛ hyperons produced inclusively by a Σ−\Sigma^-Σ− beam of 340 GeV/c momentum in nuclear targets. From a sample of 9.5 millions of identified Λ\LambdaΛ decays, polarizations were determined in the range xF>0.1x_F \gt 0.1xF>0.1 and pt≤1.6p_t\leq 1.6pt≤1.6 GeV/c . The polarization w.r.t. the production normal is mainly positive for xF≥0.3x_F \geq 0.3xF≥0.3. At fixed values of xFx_FxF, it increases with ptp_tpt to a maximum between pt=0.5p_t = 0.5pt=0.5 and pt=1p_t = 1pt=1 GeV/c , and then decreases to zero or even negative values, in sharp contrast to the plateau above pt=1p_t = 1pt=1 GeV/c observed in inclusive Λ\LambdaΛ production by protons.