A measurement of the transverse polarization of $\Lambda$-hyperons produced in inelastic pN-reactions at 450 GeV proton energy
A measurement of the transverse polarization of
$\Lambda$-hyperons produced in inelastic pN-reactions at 450 GeV proton energy
复制标题
测量 450 GeV 质子能量非弹性 pN 反应中产生的 $Lambda$-超子的横向极化
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
F. Marchetto
中科院分区：
文献类型：
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作者：
V. Fanti;A. Lai;L. Musa;A. Nappi;M. Setzu;R. Moore;D. Munday;M. Parker;S. Takach;G. Barr;G. Bocquet;J. Bremer;A. Ceccucci;J. Cogan;D. Cundy;N. Doble;G. Fischer;W. Funk;L. Gatignon;A. Gianoli;A. Gonidec;P. Grafström;W. Kubischta;V. Marzulli;G. Kesseler;J. Matheys;A. Norton;S. Palestini;B. Panzer;D. Schinzel;H. Taureg;M. Velasco;O. Vossnack;H. Wahl;I. Kojevnikov;Y. Potrebenikov;P. Hristov;G. Tatishvili;A. Tkatchev;O. Boyle;B. Hay;H. Parsons;K. Peach;C. Talamonti;A. Walker;F. Rossi;M. Savrié;C. Simani;M. Calvetti;M. Lenti;A. Michetti;T. Beier;H. Blümer;P. Buchholz;D. Coward;C. Ebersberger;A. Kalter;K. Kleinknecht;U. Koch;L. Köpke;F. Leber;S. Luitz;V. Schönharting;O. Zeitnitz;J. Chollet;S. Crépé;L. Fayard;J. Ocariz;G. Unal;P. Lubrano;G. Pierazzini;M. Sozzi;S. Schanne;O. Steinkamp;G. Govi;P. Maas;F. Marchetto
抽象的。两极分化研究
用NA 48探测器研究了CERN SPS 450 GeV质子束引起的非弹性pN反应中产生的λ超子。的
在50 GeV/c到200 GeV/c的动量范围内，在4.2 mrad的固定角度下探测到了λ超子。极化从
$-0.053 \pm 0.034$至
$-0.298 \pm 0.074$对于横向动量范围，
$\Lambda$介于0.28 GeV/c和0.86 GeV/c之间。的
极化与零一致。
Abstract. A study of the polarization of
$\Lambda$ hyperons produced in inelastic pN reactions induced by the 450 GeV proton beam from the CERN SPS has been performed with the NA48 detector. The
$\Lambda$ hyperons were detected at a fixed angle of 4.2 mrad in the momentum range from 50 GeV/c to 200 GeV/c. The polarization changes from
$-0.053 \pm 0.034$ to
$-0.298 \pm 0.074$ for a transverse momentum range of the
$\Lambda$ between 0.28 GeV/c and 0.86 GeV/c. The
$\overline{\Lambda}$ polarization is consistent with zero.