TECHNICOLOR THEORIES WITH NEGATIVE VALUES OF THE PESKIN-TAKEUCHI ELECTROWEAK PARAMETER-S

被引：31

作者：

LUTY, MA ^{[1
]}

SUNDRUM, R ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.70.529

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the pseudo Nambu-Goldstone boson contribution to the Peskin-Takeuchi electroweak parameter S can be negative in a class of technicolor theories. This negative contribution can be large enough to cancel the positive technihadron contribution, showing that electroweak precision tests alone cannot be used to rule out technicolor as the mechanism of electroweak symmetry breaking.

引用

收藏

页码：529 / 532

页数：4

相关论文

共 28 条

[1] STRUCTURE OF PHENOMENOLOGICAL LAGRANGIANS .2. [J].

CALLAN, CG ;

COLEMAN, S ;

WESS, J ;

ZUMINO, B .

PHYSICAL REVIEW, 1969, 177 (5P1) :2247-&

[2]

CHIVUKULA RS, BUHEP9225 BOST U REP

[3]

CHIVUKULA RS, HUTP92A033 HARV REP

[4] STRUCTURE OF PHENOMENOLOGICAL LAGRANGIANS .I. [J].

COLEMAN, S ;

WESS, J ;

ZUMINO, B .

PHYSICAL REVIEW, 1969, 177 (5P1) :2239-&

[5] CHIRAL LAGRANGIANS AS A TOOL TO PROBE THE SYMMETRY-BREAKING SECTOR OF THE SM AT LEP [J].

DOBADO, A ;

ESPRIU, D ;

HERRERO, MJ .

PHYSICS LETTERS B, 1991, 255 (03) :405-414

[6] THE SIGN OF S FROM ELECTROWEAK RADIATIVE-CORRECTIONS [J].

DUGAN, MJ ;

RANDALL, L .

PHYSICS LETTERS B, 1991, 264 (1-2) :154-160

[7]

EINHORN M, NSFITP91981 SANT BAR

[8]

Farhi E., 1981, Physics Reports, V74, P277, DOI 10.1016/0370-1573(81)90173-3

[9] CHIRAL PERTURBATION-THEORY - EXPANSIONS IN THE MASS OF THE STRANGE QUARK [J].

GASSER, J ;

LEUTWYLER, H .

NUCLEAR PHYSICS B, 1985, 250 (03) :465-516

[10] NEGATIVE CONTRIBUTIONS TO THE RADIATIVE-CORRECTION PARAMETER-S FROM MAJORANA PARTICLES [J].

GATES, E ;

TERNING, J .

PHYSICAL REVIEW LETTERS, 1991, 67 (14) :1840-1843