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ID: 282143.0, MPI für Kernphysik / Heavy Flavour Physics
A measurement of λ polarization in inclusive production by ∑- of 340 GeV/c in C and Cu targets
Authors:
Language:English
Date of Publication (YYYY-MM-DD):2004-04
Title of Journal:The European Physical Journal C
Journal Abbrev.:Eur. Phys. J. C
Volume:32
Issue / Number:2
Start Page:221
End Page:228
Review Status:Peer-review
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:We have measured the polarization of $\Lambda$ hyperons produced inclusively by a $\Sigma^-$ beam of 340 GeV/c momentum in nuclear targets. From a sample of 9.5 millions of identified $\Lambda$ decays, polarizations were determined in the range x F > 0.1 and $p_t\leq 1.6$ GeV/c . The polarization w.r.t. the production normal is mainly positive for $x_F \geq$ 0.3. At fixed values of x F , it increases with p t to a maximum between p t = 0.5 and p t = 1 GeV/c , and then decreases to zero or even negative values, in sharp contrast to the plateau above p t = 1 GeV/c observed in inclusive $\Lambda$ production by protons.
External Publication Status:published
Document Type:Article
Affiliations:
External Affiliations:PN Lebedev Phys Inst, Leninsky Prospect 53, Moscow 117924,; Russia; PN Lebedev Phys Inst, Moscow 117924, Russia; Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany; Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany; Univ Grenoble 1, Inst Sci Nucl, F-38026 St Martin Dheres, France; Univ Genoa, Ist Nazl Fis Nucl, Dipartimento Fis, I-16146 Genoa, Italy; CERN, CH-1211 Geneva 23, Switzerland; Univ Bristol, Bristol BS8 1TH, Avon, England
Identifiers:DOI:10.1140/epjc/s2003-01357-3
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