1995
DOI: 10.1007/bf01291194
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Measurement of the polarization of $$\Lambda ^0 , \overline \Lambda ^0 , \Sigma ^ + $$ and ?? produced in a ?? beam of 330 GeV/c

Abstract: The polarization of A ~ 4 ~ S + and N inclusively produced in X-induced interactions at 330 GeV has been measured in the experiment WA89 at CERN. This is the first measurement of polarization of baryons produced by an unpolarized hyperon beam. No polarization of ~0 is observed, as was also the case in proton beam data. At transverse momenta of about 1 GeV/c A ~ and 27 + show little polarization, significantly lower than in the proton beam data, while 3 have a polarization comparable to the polarization of A ~ … Show more

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Cited by 26 publications
(5 citation statements)
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“…The overall resolution allowed the separation of pions and kaons up to a momentum of about 100 GeV/c, which was exactly the design goal. This lead to a good number of physics results [29][30][31][32][33][34][35][36][37][38], which would not have been possible to obtain without the RICH detector.…”
Section: The Cern Omega-richmentioning
confidence: 99%
“…The overall resolution allowed the separation of pions and kaons up to a momentum of about 100 GeV/c, which was exactly the design goal. This lead to a good number of physics results [29][30][31][32][33][34][35][36][37][38], which would not have been possible to obtain without the RICH detector.…”
Section: The Cern Omega-richmentioning
confidence: 99%
“…Em 1990 foi publicado trabalho onde a produção de híperons polarizados é utilizada para a determinação do momento magnético do antihíperon :=:+ [9]. Foram realizadas em 1988 e 1993 medidas da polarização de n-s produzidos também na interação de um feixe de prótons com alvo nuclear [6,10], e verificou-se que os n-s produzidos eram não polarizados quando o alvo e o feixe incidente eram não polarizados-.• A polarização do At, bárion com charme, foi também detectada [12,13], bem como a polarização de híperons produzidos na interação de um feixe de L;-com alvos de cobre (Cu) e carbono (C) [14]. A tabela 1.1 contém o resumo de alguns resultados experimentais para a polarização de híperons .…”
Section: 24unclassified
“…Poucas medidas da polarização de híperons foram realizadas para a interação de feixe de mésons com alvos nucleares [7,8,11], e em particular nenhum resultado definitivo foi ainda publicado para o:=:-e o n-. Uma medida, publicada recentemente, da polarização do Aº pr~duzido na interação de píons com alvos de cobre (Cu) [11] (Pr) = l.3Gev/c [14] . ::.…”
Section: 24unclassified
“…Comparing with that of parton distribution functions (PDFs), we know even less about the spin dependence of FFs. Among different aspects, hyperon polarizations are best studied both experimentally [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] and phenomenologically . Parametrizations of the corresponding spin-dependent FFs have been proposed [48].…”
Section: Introductionmentioning
confidence: 99%