Phenomenology of gluino decays via loops and top-quark Yukawa coupling

1990 ◽  
Vol 42 (5) ◽  
pp. 1568-1576 ◽  
Author(s):  
Howard Baer ◽  
Xerxes Tata ◽  
Jeffrey Woodside
Keyword(s):  
Yukawa Coupling ◽  
Top Quark ◽  
Gluino Decays

scholarly journals Phenomenology of a nonstandard top quark Yukawa coupling

1994 ◽  
Vol 50 (11) ◽  
pp. 7042-7047 ◽  
Author(s):  
X. Zhang ◽  
S. K. Lee ◽  
K. Whisnant ◽  
B.-L. Young
Keyword(s):  
Yukawa Coupling ◽  
Top Quark

scholarly journals Large top quark Yukawa coupling and horizontal symmetries

1998 ◽  
Vol 57 (7) ◽  
pp. 3977-3985 ◽  
Author(s):  
Andrija Rašin
Keyword(s):  
Yukawa Coupling ◽  
Top Quark

scholarly journals Measuring the top-quark Yukawa coupling at hadron colliders viatt¯h,h→W+W−

2002 ◽  
Vol 66 (3) ◽  
Author(s):  
F. Maltoni ◽  
D. Rainwater ◽  
S. Willenbrock
Keyword(s):  
Yukawa Coupling ◽  
Top Quark ◽  
Hadron Colliders

scholarly journals Phenomenological consequences of an enhanced top-quark Yukawa coupling

1985 ◽  
Vol 31 (1) ◽  
pp. 95-98 ◽  
Author(s):  
Marc Sher ◽  
Dennis Silverman
Keyword(s):  
Yukawa Coupling ◽  
Top Quark

scholarly journals Probing the CP structure of the top quark Yukawa coupling: Loop sensitivity versus on-shell sensitivity

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
Till Martini ◽  
Ren-Qi Pan ◽  
Markus Schulze ◽  
Meng Xiao
Keyword(s):  
Yukawa Coupling ◽  
Top Quark ◽  
Coupling Loop

scholarly journals Why should we care about the top quark Yukawa coupling?

2015 ◽  
Vol 120 (3) ◽  
pp. 335-343 ◽  
Author(s):  
F. Bezrukov ◽  
M. Shaposhnikov
Keyword(s):  
Yukawa Coupling ◽  
Top Quark

scholarly journals Exact one-loop running couplings in the standard model

2008 ◽  
Vol 86 (9) ◽  
pp. 1067-1070 ◽  
Author(s):  
F A Chishtie ◽  
M D Lepage ◽  
D GC McKeon ◽  
T G Steele ◽  
I Zakout
Keyword(s):  
Standard Model ◽  
Yukawa Coupling ◽  
Top Quark ◽  
Higgs Mass ◽  
Gauge Coupling ◽  
New Physics ◽  
Energy Scale ◽  
Scalar Coupling ◽  
Upper And Lower Bounds ◽  
The Standard Model

Taking the dominant couplings in the standard model to be the quartic scalar coupling, the Yukawa coupling of the top quark, and the SU(3) gauge coupling, we consider their associated running couplings to one-loop order. Despite the nonlinear nature of the differential equations governing these functions, we show that they can be solved exactly. The nature of these solutions is discussed and their singularity structure is examined. It is shown that for a sufficiently small Higgs mass, the quartic scalar coupling decreases with increasing energy scale and becomes negative, indicative of vacuum instability. This behavior changes for a Higgs mass greater than 168 GeV, beyond which this couplant increases with increasing energy scales and becomes singular prior to the ultraviolet pole of the Yukawa coupling. Upper and lower bounds on the Higgs mass corresponding to new physics at the TeV scale are obtained and compare favourably with the numerical results of the one-loop and two-loop analyses with inclusion of electroweak couplings.PACS Nos.: 11.10.Hi, 14.80.Bn

SIGNAL FOR SUPERSTRING QUARK SINGLET PRODUCTION: VIOLATION OF FLAVOR UNIVERSALITY

1987 ◽  
Vol 02 (04) ◽  
pp. 1181-1188
Author(s):  
V. Barger ◽  
N.G. Deshpande ◽  
K. Hagiwara
Keyword(s):  
Top Quark ◽  
Quark Flavor ◽  
Gluino Decays

We investigate the signatures of leptoquarks or diquarks of the rank 5 E6 superstring model produced in [Formula: see text] and pp machines. Leptoquark decays are characterized by lack of e, μ universality [Formula: see text] and diquark decays by quark flavor non-conservation (e.g., [Formula: see text]). If the top quark is heavier than one of the scalar superpartners [Formula: see text], then it may decay dominantly by two body modes (e.g., [Formula: see text] or [Formula: see text]), invalidating the usual signatures. Two body gluino decays [Formula: see text] may swamp its conventional signatures.

Sign in / Sign up

Export Citation Format

Share Document