Electroweak jet cascading in the decay of superheavy particles

被引：63

作者：

Berezinsky, V ^{[1
]}

Kachelriess, M

Ostapchenko, S

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Assergi, AQ, Italy

[2] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany

[3] Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany

[4] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 199899, Russia

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.89.171802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study decays of superheavy particles X into leptons. We show that they initiate cascades similar to QCD parton jets, if m(X)greater than or similar to10(6) GeV. Electroweak cascading is studied and the energy spectra of the produced leptons are calculated in the framework of a broken SU(2) model of weak interactions. As application, important for the Z-burst model for ultrahigh energy cosmic rays, we consider decays of superheavy particles coupled on tree level only to neutrinos and derive a stringent limit for these decays from the observed diffuse extragalactic gamma-ray flux.

引用

页码：171802/1 / 171802/4

页数：4

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