CALCULATION OF THE TOP QUARK MASS IN THE FLIPPED SU(5)XU(1) SUPERSTRING MODEL

被引:19
作者
LEONTARIS, GK
RIZOS, J
TAMVAKIS, K
机构
[1] Physics Department, University of Ioannina
关键词
D O I
10.1016/0370-2693(90)90235-X
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a complete renormalization group calculation of the top-quark mass in the SU (5) × U (1) superstring model. We solve the coupled renormalization group equations for the gauge and Yukawa couplings in the two-loop approximation and obtain the top-quark mass as a function of two parameters of the model which could be chosen to be ratios of singlet VEVs associated with the surplus [U (1)]4 breaking. We obtain a heavy top-quark with 150 GeV≤mt<200 GeV, for most part of the parameter space, while lower values are possible only in a very small extremal region. We also compute the allowed range of unification parameters [Mx, sin2θw, α3(MW)] in the presence of a heavy top-quark. © 1990.
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页码:83 / 88
页数:6
相关论文
共 28 条
[1]   SUPERSYMMETRY AMONG FREE FERMIONS AND SUPERSTRINGS [J].
ANTONIADIS, I ;
BACHAS, C ;
KOUNNAS, C ;
WINDEY, P .
PHYSICS LETTERS B, 1986, 171 (01) :51-56
[2]   4-DIMENSIONAL SUPERSTRINGS [J].
ANTONIADIS, I ;
BACHAS, CP ;
KOUNNAS, C .
NUCLEAR PHYSICS B, 1987, 289 (01) :87-108
[3]   4D FERMIONIC SUPERSTRINGS WITH ARBITRARY TWISTS [J].
ANTONIADIS, I ;
BACHAS, C .
NUCLEAR PHYSICS B, 1988, 298 (03) :586-612
[4]   AN IMPROVED FLIPPED SU(5)XU(1) MODEL FROM THE 4-DIMENSIONAL STRING [J].
ANTONIADIS, I ;
ELLIS, J ;
HAGELIN, J ;
NANOPOULOS, DV .
PHYSICS LETTERS B, 1988, 208 (02) :209-215
[5]   GUT MODEL-BUILDING WITH FERMIONIC 4-DIMENSIONAL STRINGS [J].
ANTONIADIS, I ;
ELLIS, J ;
HAGELIN, JS ;
NANOPOULOS, DV .
PHYSICS LETTERS B, 1988, 205 (04) :459-465
[6]   ORBIFOLD COMPACTIFIED SUPERSTRING MODELS WITH TETRAHEDRAL AND OCTAHEDRAL POINT GROUPS [J].
BAILIN, D ;
LOVE, A ;
THOMAS, S .
NUCLEAR PHYSICS B, 1988, 298 (01) :75-91
[7]   A 3-GENERATION ORBIFOLD-COMPACTIFIED SUPERSTRING MODEL [J].
BAILIN, D ;
LOVE, A ;
THOMAS, S .
PHYSICS LETTERS B, 1987, 194 (03) :385-389
[8]   THE UNIFICATION MASS, SIN2 THETO-W AND MB/MT IN NON-MINIMAL SUPERSYMMETRIC SU(5) [J].
BJORKMAN, JE ;
JONES, DRT .
NUCLEAR PHYSICS B, 1985, 259 (2-3) :533-548
[9]   VACUUM CONFIGURATIONS FOR SUPERSTRINGS [J].
CANDELAS, P ;
HOROWITZ, GT ;
STROMINGER, A ;
WITTEN, E .
NUCLEAR PHYSICS B, 1985, 258 (01) :46-74
[10]  
DEPENDINGER JP, 1984, PHYS LETT B, V139, P170