Large Higgs boson exchange contribution in three-body neutralino decays

被引：17

作者：

Bartl, A

Majerotto, W

Porod, W

机构：

[1] Univ Vienna, Inst Theoret Phys, A-1090 Vienna, Austria

[2] Austrian Acad Sci, Inst Hochenergiephys, A-1050 Vienna, Austria

[3] Univ Valencia, CSIC, IFIC, Dept Fis Teor, E-46100 Valencia, Spain

来源：

PHYSICS LETTERS B | 1999年 / 465卷 / 1-4期

基金：

奥地利科学基金会;

关键词：

D O I：

10.1016/S0370-2693(99)01042-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the Higgs boson exchange contribution can be large in three-body decays of neutralinos even in the case of small tan beta. This enlarges the branching ratios for the decays <(chi)over tilde>(0)(2) --> <(chi)over tilde>(0)(1) <b(b)over bar> and <(chi)over tilde>(0)(2) --> <(chi)over tilde>(0)(1) tau(-) tau(+). This is the case in the region of the parameter space where the two lightest neutralinos are gaugino-like, the sfermions are heavier than 300 GeV, and m(A0) less than or similar to 200 GeV. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：187 / 192

页数：6

共 37 条

[1]

ABACHI S, 1996, PHYS REV LETT, V76, P4307

[2]

ABE F, 1996, PHYS REV LETT, V76, P2228

[3] Physics with e+e- linear colliders [J].

Accomando, E ;

Andreazza, A ;

Anlauf, H ;

Ballestrero, A ;

Barklow, T ;

Bartels, J ;

Bartl, A ;

Battaglia, M ;

Beenakker, W ;

Belanger, G ;

Bernreuther, W ;

Biebel, J ;

Binnewies, J ;

Blumlein, J ;

Boos, E ;

Borzumati, F ;

Boudjema, F ;

Brandenburg, A ;

Bussey, PJ ;

Cacciari, M ;

Casalbuoni, R ;

Corsetti, A ;

De Curtis, S ;

Cuypers, F ;

Daskalakis, G ;

Deandrea, A ;

Denner, A ;

Diehl, M ;

Dittmaier, S ;

Djouadi, A ;

Dominici, D ;

Dreiner, H ;

Eberl, H ;

Ellwanger, U ;

Engel, R ;

Flottmann, K ;

Franz, H ;

Gajdosik, T ;

Gatto, R ;

Genten, H ;

Godbole, R ;

Gounaris, G ;

Greco, M ;

Grivaz, JF ;

Guetta, D ;

Haidt, D ;

Harlander, R ;

He, HJ ;

Hollik, W ;

Huitu, K .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1998, 299 (01) :1-78

[4]

ALTARELLI G, 9601 CERN, V1, P463

[5] Neutralino production as a SUSY discovery process at CERN LEP 2 [J].

Ambrosanio, S ;

Mele, B .

PHYSICAL REVIEW D, 1995, 52 (07) :3900-3918

[6] Neutralino decays in the minimal supersymmetric standard model [J].

Ambrosanio, S ;

Mele, B .

PHYSICAL REVIEW D, 1996, 53 (05) :2541-2562

[7]

AMBROSANIO S, P WORKSH PHYS LEP2

[8]

[Anonymous], MOD PHYS LETT A

[9] GAUGINOS AS A SIGNAL FOR SUPERSYMMETRY AT PBARP COLLIDERS [J].

BAER, H ;

HAGIWARA, K ;

TATA, X .

PHYSICAL REVIEW D, 1987, 35 (05) :1598-1625

[10] Supersymmetry reach of Fermilab Tevatron upgrades: A comparative study [J].

Baer, H ;

Chen, CH ;

Paige, F ;

Tata, X .

PHYSICAL REVIEW D, 1996, 54 (09) :5866-5879

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