Normal tau polarization as a sensitive probe of CP violation in chargino decay

被引：6

作者：

Dreiner, Herbi K. ^{[1
,2
]}

Kittel, Olaf ^{[3
,4
]}

Marold, Anja ^{[1
,2
]}

机构：

[1] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

[2] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[3] Univ Granada, Dept Fis Teor & Cosmos, E-18071 Granada, Spain

[4] Univ Granada, CAFPE, E-18071 Granada, Spain

来源：

PHYSICAL REVIEW D | 2010年 / 82卷 / 11期

关键词：

ELECTRIC-DIPOLE MOMENT; NEUTRALINO PRODUCTION; PARAMETER ANALYSIS; SPIN CORRELATIONS; ANOMALOUS U(1); SUPERSYMMETRY; ASYMMETRY; NEUTRON; SUPERGRAVITY; E(+)E(-);

D O I：

10.1103/PhysRevD.82.116005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

CP violation in the spin-spin correlations in chargino production and subsequent two-body decay into a tau and a tau-sneutrino is studied at the ILC. From the normal polarization of the tau, an asymmetry is defined to test the CP-violating phase of the higgsino mass parameter mu. Asymmetries of more than +/- 70% are obtained, also in scenarios with heavy first and second generation sfermions. Bounds on the statistical significances of the CP asymmetries are estimated. As a result, the normal tau polarization in the chargino decay is one of the most sensitive probes to constrain or measure the phase phi(mu) at the ILC, motivating further detailed experimental studies.

引用

页数：19

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