Recent direct measurement of the top quark mass and quasi-infrared fixed point

被引：18

作者：

Brahmachari, B

机构：

[1] Department of Physics and Astronomy, University of Maryland, College Park

来源：

MODERN PHYSICS LETTERS A | 1997年 / 12卷 / 26期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1142/S0217732397002016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We note that the recent direct measurement of the top quark mass at 173.3 +/- 5.6 (stat) +/- 6.2(syst) by DO collaboration severely constrains the theoretically attractive infrared fixed point scenario of the top quark Yukawa coupling in supersymmetric GUTs. For one-step unified models the above-mentioned measurement bounds the arbitrary but experimentally determinable parameter tan beta to the range 1.3 less than or equal to tan beta less than or equal to 2.1. Further crunch on the top quark mass may determine tan beta even more accurately within the fixed point scenario. On the other hand, an experimental value of tan beta > 2.1 will rule out the fixed point scenario bounding h(t)(2)(M-X)/4 pi to 0.022 from above.

引用

页码：1969 / 1972

页数：4

共 35 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]

ABACHI S, HEPEX9703008

[3] 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

[4]

ANANTHNARAYAN B, 1990, PHYS REV D, V44, P1613

[5]

[Anonymous], 1990, INTRO SUPERSYMMETRY

[6] 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

[7] SUPERSYMMETRIC MASS-SPECTRUM IN SU(5) SUPERGRAVITY GRAND UNIFICATION [J].

ARNOWITT, R ;

NATH, P .

PHYSICAL REVIEW LETTERS, 1992, 69 (05) :725-728

[8] SUPERSYMMETRIC SO(10) SIMPLIFIED [J].

BABU, KS ;

BARR, SM .

PHYSICAL REVIEW D, 1995, 51 (05) :2463-2470

[9] PRECISION CORRECTIONS TO SUPERSYMMETRIC UNIFICATION [J].

BAGGER, J ;

MATCHEV, K ;

PIERCE, D .

PHYSICS LETTERS B, 1995, 348 (3-4) :443-450

[10] PHENOMENOLOGICAL IMPLICATIONS OF THE M(T)RGE FIXED-POINT FOR SUSY HIGGS-BOSON SEARCHES [J].

BARGER, V ;

BERGER, MS ;

OHMANN, P ;

PHILLIPS, RJN .

PHYSICS LETTERS B, 1993, 314 (3-4) :351-356

← 1 2 3 4 →