λ polarization from unpolarized quark fragmentation

被引：84
作者：
Anselmino, M
Boer, D
D'Alesio, U
Murgia, F
机构：
[1] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy
[2] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy
[3] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA
[4] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy
[5] Univ Cagliari, Ist Nazl Fis Nucl, Sez Cagliari, I-09042 Monserrato, CA, Italy
来源：
PHYSICAL REVIEW D | 2001年 / 63卷 / 05期
关键词：
D O I：
10.1103/PhysRevD.63.054029
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The long-standing problem of explaining the observed polarization of Lambda hyperons, inclusively produced in the high-energy collisions of unpolarized hadrons, is tackled by considering spin- and k(perpendicular to)-dependent quark-fragmentation functions. The data on Lambda 's and <(<Lambda>)over bar>'s produced in p-N processes are used to determine simple phenomenological expressions for these new "polarizing fragmentation functions," which describe the experiments remarkably well.
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页数：9
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