scholarly journals A heavy neutral gauge boson near the Z boson mass pole via third generation fermions at the LHC

2020 ◽  
Vol 803 ◽  
pp. 135326
Author(s):  
Mohammad Abdullah ◽  
Mykhailo Dalchenko ◽  
Teruki Kamon ◽  
Denis Rathjens ◽  
Adrian Thompson
Keyword(s):  
Gauge Boson ◽  
Z Boson ◽  
Boson Mass ◽  
Third Generation ◽  
Neutral Gauge Boson

CONSTRAINTS ON THE SU(5)C × SU(2)L × U(1)′ MODEL FROM LEP DATA

1999 ◽  
Vol 14 (07) ◽  
pp. 1049-1060 ◽  
Author(s):  
SASWATI SARKAR ◽  
ASIM K. RAY ◽  
UTPAL SARKAR
Keyword(s):  
Lower Bound ◽  
Standard Model ◽  
Gauge Boson ◽  
Z Boson ◽  
Boson Mass ◽  
Precision Measurements ◽  
Tree Level ◽  
Mixing Angle ◽  
Neutral Gauge Boson ◽  
The Standard Model

We have determined constraints on the SU (5)C × SU (2)L × U (1)′ model in terms of the extra mixing angle ϕ in the neutral gauge boson sector and ΔρM, the deviation of the Standard Model ρ parameter from unity at the tree level, using the recent precision measurements at LEP on electroweak parameters at the Z peak. The lower bound of the extra Z′ boson mass has also been determined.

EXTRA NEUTRAL GAUGE BOSON FROM THE 3-3-1 MODEL AND THE SPIN CORRECTION OF TOP QUARK PAIR PRODUCTION AT THE ILC

2009 ◽  
Vol 24 (16) ◽  
pp. 1307-1315 ◽  
Author(s):  
YAO-BEI LIU ◽  
XUE-LEI WANG
Keyword(s):  
Pair Production ◽  
Gauge Boson ◽  
Cross Sections ◽  
Top Quark ◽  
Z Boson ◽  
High Energy ◽  
Numerical Results ◽  
Spin Configuration ◽  
Neutral Gauge Boson ◽  
Quark Pairs

In the off-diagonal basis, we explore the effects of extra neutral gauge boson Z' predicted in two versions of SU (3)C × SU (3)L × U (1)X model on the spin configuration of the top quark pair production in the high energy linear e+e- collider (ILC). Our numerical results show that, the cross sections for the suppressed spin configurations can be enhanced with the effects of the Z' boson through the modification of the spin configuration by producing enough top quark pairs to be measured in the future ILC experiments, which provides the way to observe the effects of Z' predicted in the 3-3-1 model and discriminate the various versions of 3-3-1 model.

scholarly journals BOUNDING THE TAU NEUTRINO MAGNETIC MOMENT FROM THE PROCESS $e^+e^-\rightarrow\gamma\nu\bar\nu$

2001 ◽  
Vol 16 (07) ◽  
pp. 457-465 ◽  
Author(s):  
AYTEKIN AYDEMIR ◽  
RAMAZAN SEVER
Keyword(s):  
Abelian Group ◽  
Gauge Boson ◽  
Magnetic Moment ◽  
Upper Bound ◽  
Vector Boson ◽  
Boson Mass ◽  
Neutral Gauge Boson ◽  
Tau Neutrino ◽  
Neutral Vector ◽  
Gauge Boson Mass

In a class of E6 inspired models with a light additional neutral vector boson, we discuss the effects of the magnetic moment of the tau neutrino by analyzing [Formula: see text] at the Z-pole. We take into account present scenarios for the extra Abelian group and vary extra neutral gauge boson mass beyond the present experimental exclusion limits. The present LEP experimental results prove that we can set an upper bound on the magnetic moment of the tau neutrino: κντ≤ 1.83× 10-6.

scholarly journals Unravelling an extra neutral gauge boson at the LHC using third generation fermions

2011 ◽  
Vol 83 (11) ◽  
Author(s):  
Ross Diener ◽  
Stephen Godfrey ◽  
Travis A. W. Martin
Keyword(s):  
Gauge Boson ◽  
Third Generation ◽  
Neutral Gauge Boson

scholarly journals Neutral Current in Reduced Minimal 3-3-1 Model

2014 ◽  
Vol 24 (2) ◽  
pp. 97 ◽  
Author(s):  
Vu Thi Ngoc Huyen ◽  
Hoang Ngoc Long ◽  
Tran Thanh Lam ◽  
Vo Quoc Phong
Keyword(s):  
Gauge Boson ◽  
Z Boson ◽  
Neutral Current ◽  
Decay Rates ◽  
Gauge Bosons ◽  
Mixing Angle ◽  
Neutral Gauge Boson ◽  
The Third ◽  
Model Based ◽  
The Masses

This work is devoted for gauge boson sector of the recentlyproposed model based on \(\mathrm{SU}(3)_C\otimes \mathrm{SU}(3)_L\otimes \mathrm{U}(1)_X\) group with minimal content of leptons andHiggses. The limits on the masses of the bilepton gauge bosons andon the mixing angle among the neutral ones are deduced. Using theFritzsch anzats on quark mixing, we show that the third family ofquarks should  be different from the first two. We obtain a lowerbound on mass of the new heavy neutral gauge boson as 4.032 TeV.Using data on branching decay rates of the \(Z\) boson, we  can fix the limit to the \(Z\) and $Z^\prime$ mixing angle\(\phi\) as \(-0.001\le\phi\le 0.0003\).

GAUGE BOSON MASSES FROM FERMION MASSES?

1992 ◽  
Vol 07 (22) ◽  
pp. 1991-1996 ◽  
Author(s):  
R. FOOT ◽  
S. TITARD
Keyword(s):  
Gauge Boson ◽  
Z Boson ◽  
Heavy Fermions ◽  
Mass Matrix ◽  
Gauge Bosons ◽  
Fermion Masses ◽  
The Masses

We examine the possibility that the masses of the W and Z gauge bosons are induced radiatively from the masses of heavy fermions. From experiment we know that [Formula: see text][Formula: see text]. We point out that this relation can be naturally obtained if the W and Z boson masses are radiatively generated from heavy fermions which arise from a mass matrix which has large electroweak violating masses as well as very large electroweak invariant masses. Two examples of this are considered: The usual see-saw neutrino model and the SU(5)c/quark-lepton symmetric models.

scholarly journals A SCREENING MECHANISM FOR EXTRA W AND Z GAUGE BOSONS

2000 ◽  
Vol 15 (21) ◽  
pp. 3369-3394
Author(s):  
JOAQUIM MATIAS ◽  
ALESSANDRO VICINI
Keyword(s):  
Mass Spectrum ◽  
Gauge Boson ◽  
Extra Dimensions ◽  
Boson Mass ◽  
Gauge Bosons ◽  
Gauge Boson Mass ◽  
Kaluza Klein

We generalize a previous construction of a fermiophobic model to the case of more than one extra W and Z gauge bosons. We focus in particular on the existence of screening configurations and their implication on the gauge boson mass spectrum. One of these configurations allows for the existence of a set of relatively light new gauge bosons, without violation of the quite restrictive bounds coming from the ρ NC parameter. The links with Bess and degenerate Bess models are also discussed. Also the signal given here by this more traditional gauge extension of the SM could help to disentangle it from the towers of Kaluza–Klein states over W and Z gauge bosons in extra dimensions.

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