Testing gauge-Yukawa-unified models by M(t)

被引:39
作者
Kubo, J
Mondragon, M
Olechowski, M
Zoupanos, G
机构
[1] INST THEORET PHYS, D-69120 HEIDELBERG, GERMANY
[2] IST NAZL FIS NUCL, I-10125 TURIN, ITALY
[3] UNIV TURIN, DIPARTAMENTO FIS TEOR, I-10125 TURIN, ITALY
[4] MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST, D-80805 MUNICH, GERMANY
关键词
D O I
10.1016/0550-3213(96)00433-6
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
Gauge-Yukawa Unification (GYU) relates the gauge and Yukawa couplings, thereby going beyond the usual GUTs, and it is assumed that the GYU in the third fermion generation implies that its Yukawa couplings are of the same order as the unified gauge coupling at the GUT scale. We re-examine carefully the recent observation that the top-bottom mass hierarchy can be explained to a certain extent in supersymmetric GYU models. It is found that there are equiv-top-mass lines in the boundary conditions of the Yukawa couplings so that two different GYU models on the same line can not be distinguished by the top mass M(t) alone. If they are on different lines, they could be distinguished by M(t) in principle, provided that the predicted M(t)'s are well below the infrared value M(t)(IR). We find that the ratio M(t)(IR)/sin beta depends on tan beta for large tan beta and the lowest value of M(t)(IR) is similar to 188 GeV, We focus our attention on the existing SU(5) GYU models, which are obtained by requiring finiteness and reduction of couplings. They, respectively, predict M(t) = (183 + delta(MSSM)M(t) +/- 5) GeV and (181 + delta(MSSM)M(t) +/- 3) GeV, where delta(t)(MSSM) stands for the MSSM threshold correction and is similar to -2 GeV for the case that all the MSSM superpartners have the same mass M(SUSY) With mu(H)/M(SUSY) much less than 1.
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页码:25 / 45
页数:21
相关论文
共 76 条
[1]   OBSERVATION OF THE TOP-QUARK [J].
ABACHI, S ;
ABBOTT, B ;
ABOLINS, M ;
ACHARYA, BS ;
ADAM, I ;
ADAMS, DL ;
ADAMS, M ;
AHN, S ;
AIHARA, H ;
ALITTI, J ;
ALVAREZ, G ;
ALVES, GA ;
AMIDI, E ;
AMOS, N ;
ANDERSON, EW ;
ARONSON, SH ;
ASTUR, R ;
AVERY, RE ;
BADEN, A ;
BALAMURALI, V ;
BALDERSTON, J ;
BALDIN, B ;
BANTLY, J ;
BARTLETT, JF ;
BAZIZI, K ;
BENDICH, J ;
BERI, SB ;
BERTRAM, I ;
BEZZUBOV, VA ;
BHAT, PC ;
BHATNAGAR, V ;
BHATTACHARJEE, M ;
BISCHOFF, A ;
BISWAS, N ;
BLAZEY, G ;
BLESSING, S ;
BOEHNLEIN, A ;
BOJKO, NI ;
BORCHERDING, F ;
BORDERS, J ;
BOSWELL, C ;
BRANDT, A ;
BROCK, R ;
BROSS, A ;
BUCHHOLZ, D ;
BURTOVOI, VS ;
BUTLER, JM ;
CASEY, D ;
CASTILLAVALDEZ, H ;
CHAKRABORTY, D .
PHYSICAL REVIEW LETTERS, 1995, 74 (14) :2632-2637
[2]   NEARBY DOORWAY STATES, PARITY DOUBLETS, AND PARITY MIXING IN COMPOUND NUCLEAR-STATES [J].
AUERBACH, N ;
BOWMAN, JD ;
SPEVAK, V .
PHYSICAL REVIEW LETTERS, 1995, 74 (14) :2638-2641
[3]  
[Anonymous], 1987, MOD PHYS LETT
[4]   SIMPLE TREATMENT OF THRESHOLD EFFECTS [J].
ANTONIADIS, I ;
KOUNNAS, C ;
TAMVAKIS, K .
PHYSICS LETTERS B, 1982, 119 (4-6) :377-380
[5]   RENORMALIZATION-GROUP STUDY OF THE STANDARD MODEL AND ITS EXTENSIONS - THE STANDARD MODEL [J].
ARASON, H ;
CASTANO, DJ ;
KESTHELYI, B ;
MIKAELIAN, S ;
PIARD, EJ ;
RAMOND, P ;
WRIGHT, BD .
PHYSICAL REVIEW D, 1992, 46 (09) :3945-3965
[6]   WHY IS TOP HEAVIER THAN BOTTOM - YUKAWA AND MASS UNIFICATION IN SUSY MODEL [J].
BANDO, M ;
KUGO, T ;
MAEKAWA, N ;
NAKANO, H .
MODERN PHYSICS LETTERS A, 1992, 7 (36) :3379-3390
[7]   INFRARED FIXED-POINT SOLUTION FOR THE TOP-QUARK MASS AND UNIFICATION OF COUPLINGS IN THE MSSM [J].
BARDEEN, WA ;
CARENA, M ;
POKORSKI, S ;
WAGNER, CEM .
PHYSICS LETTERS B, 1994, 320 (1-2) :110-116
[8]   SUPERSYMMETRIC GRAND UNIFIED THEORIES - 2-LOOP EVOLUTION OF GAUGE AND YUKAWA COUPLINGS [J].
BARGER, V ;
BERGER, MS ;
OHMANN, P .
PHYSICAL REVIEW D, 1993, 47 (03) :1093-1113
[9]   LOW-ENERGY PREDICTIONS OF A 2-LOOP FINITE SUPERSYMMETRIC SU5 THEORY [J].
BJORKMAN, JE ;
JONES, DRT ;
RABY, S .
NUCLEAR PHYSICS B, 1985, 259 (2-3) :503-532
[10]   CONSTRAINTS ON THE MINIMAL SUSY-SO(10) MODEL FROM COSMOLOGY AND THE B-]S-GAMMA DECAY [J].
BORZUMATI, FM ;
OLECHOWSKI, M ;
POKORSKI, S .
PHYSICS LETTERS B, 1995, 349 (03) :311-318