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; W. Beusch; M. Boss; S. Brons; W. Brueckner; M. Buenerd; C. Busch; C. Buescher; F. Charignon; J. Chauvin; E.A. Chudakov; U. Dersch; F. Dropmann; J. Engelfried; F. Faller; A. Fournier; 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; 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; G. Rosner; L. Rossi; H. Rudolph; C. Scheel; L. Schmitt; H.W. Siebert; A. Simon; V.J. Smith; O. Thilmann; A. Trombini; E. Vesin; B. Volkemer; K. Vorwalter; T. Waelcher; G. Waelder; R. Werding; E. Wittmann; M.V. Zavertyaev

doi:10.1140/epjc/s2003-01357-3

Journal Articles European Physical Journal C: Particles and Fields Year : 2004

A measurement of $\Lambda$ polarization in inclusive production by $\Sigma^{-}$ of 340 GeV/c in C and Cu targets

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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

Laboratoire de Physique Subatomique et de Cosmologie

W. Beusch

Function : Author

M. Boss

Function : Author

S. Brons

Function : Author

W. Brueckner

Function : Author

M. Buenerd

Function : Author

Laboratoire de Physique Subatomique et de Cosmologie

C. Busch

Function : Author

C. Buescher

Function : Author

F. Charignon

Function : Author

Laboratoire de Physique Subatomique et de Cosmologie

J. Chauvin

Function : Author

Laboratoire de Physique Subatomique et de Cosmologie

E.A. Chudakov

Function : Author

U. Dersch

Function : Author

F. Dropmann

Function : Author

J. Engelfried

Function : Author

F. Faller

Function : Author

A. Fournier

Function : Author

Laboratoire de Physique Subatomique et de Cosmologie

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

P. Martin

Function : Author

Laboratoire de Physique Subatomique et de Cosmologie

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

M. Rey-Campagnolle

Function : Author

Laboratoire de Physique Subatomique et de Cosmologie

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

E. Vesin

Function : Author

Laboratoire de Physique Subatomique et de Cosmologie

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.

Domains

High Energy Physics - Experiment [hep-ex]

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https://in2p3.hal.science/in2p3-00020277

Submitted on : Wednesday, January 21, 2004-9:14:21 AM

Last modification on : Thursday, April 11, 2024-1:18:11 PM

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in2p3-00020277 , version 1 (21-01-2004)

Identifiers

HAL Id : in2p3-00020277 , version 1
DOI : 10.1140/epjc/s2003-01357-3

Cite

M.I. Adamovich, Yu.A. Alexandrov, S.P. Baranov, D. Barberis, M. Beck, et al.. A measurement of $\Lambda$ polarization in inclusive production by $\Sigma^{-}$ of 340 GeV/c in C and Cu targets. European Physical Journal C: Particles and Fields, 2004, 32, pp.221-228. ⟨10.1140/epjc/s2003-01357-3⟩. ⟨in2p3-00020277⟩

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A measurement of $\Lambda$ polarization in inclusive production by $\Sigma^{-}$ of 340 GeV/c in C and Cu targets

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