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.

LEFT–RIGHT TWIN HIGGS MODEL AND THE SPIN CORRECTION OF TOP-QUARK PAIR PRODUCTION AT ILC

2009 ◽  
Vol 24 (23) ◽  
pp. 4261-4270 ◽  
Author(s):  
YAO-BEI LIU ◽  
SHUAI-WEI WANG
Keyword(s):  
Pair Production ◽  
Gauge Boson ◽  
Cross Sections ◽  
Top Quark ◽  
Center Of Mass ◽  
High Energy ◽  
Higgs Model ◽  
Spin Configuration ◽  
Neutral Gauge Boson ◽  
Quark Pairs

The left–right twin Higgs model predicts the existence of the new neutral gauge boson ZH. In the off-diagonal basis, we explore the effects of extra neutral gauge boson ZH on the spin configuration of the top-quark pair production in the high energy linear e+e- collider (ILC). We find that the new gauge boson ZH exchange can generate significant corrections to the differential cross-sections for the the [Formula: see text] and [Formula: see text] states. Furthermore, when the ZH mass MZH approaches the center-of-mass energy [Formula: see text], the cross-section resonance emerges. We expect that the effects of the new gauge boson ZH on the spin configurations of the top-quark pairs production might be observed in future ILC experiments.

scholarly journals CP-ODD HIGGS BOSON PRODUCTION IN ASSOCIATION WITH NEUTRAL GAUGE BOSON IN HIGH ENERGY e+e- COLLISIONS

1999 ◽  
Vol 14 (30) ◽  
pp. 2093-2107 ◽  
Author(s):  
A. G. AKEROYD ◽  
A. ARHRIB ◽  
M. CAPDEQUI PEYRANÉRE
Keyword(s):  
Higgs Boson ◽  
Gauge Boson ◽  
Cross Sections ◽  
Top Quark ◽  
Higgs Doublet ◽  
High Energy ◽  
Loop Contribution ◽  
Neutral Gauge Boson ◽  
Associated Production ◽  
The One

We study the associated production of a CP-odd Higgs boson A0 with a neutral gauge boson (Z or photon) in high-energy e+e- collisions at the one-loop level in the framework of two Higgs doublet models (THDM). We find that in the small tan β regime, the top quark loop contribution is enhanced leading to significant cross-sections (about a few fb), while in the large tan β regime the cross-section does not attain observable rates.

scholarly journals tt̄H Coupling Measurement with the ATLAS Detector at the LHC

2018 ◽  
Vol 182 ◽  
pp. 02052
Author(s):  
Asma Hadef
Keyword(s):  
Higgs Boson ◽  
Cross Sections ◽  
Top Quark ◽  
High Energy Physics ◽  
Center Of Mass ◽  
High Energy ◽  
New Physics ◽  
Decay Modes ◽  
Center Of Mass Energy ◽  
Higgs Decay

The Higgs boson was discovered on the 4th of July 2012 with a mass around 125 GeV by ATLAS and CMS experiments at LHC. Determining the Higgs properties (production and decay modes, couplings,...) is an important part of the high-energy physics programme in this decade. A search for the Higgs boson production in association with a top quark pair (tt̄H) at ATLAS [1] is summarized in this paper at an unexplored center-of-mass energy of 13 TeV, which could allow a first direct measurement of the top quark Yukawa coupling and could reveal new physics. The tt̄H analysis in ATLAS is divided into 3 channels according to the Higgs decay modes: H → Hadrons, H → Leptons and H → Photons. The best-fit value of the ratio of observed and Standard Model cross sections of tt̄H production process, using 2015-2016 data and combining all tt̄H final states, is 1:8±0:7, corresponds to 2:8σ (1:8σ) observed (expected) significance.

scholarly journals Associated top quark pair production with a heavy boson: differential cross sections at NLO + NNLL accuracy

2020 ◽  
Vol 80 (5) ◽  
Author(s):  
Anna Kulesza ◽  
Leszek Motyka ◽  
Daniel Schwartländer ◽  
Tomasz Stebel ◽  
Vincent Theeuwes
Keyword(s):  
Pair Production ◽  
Cross Sections ◽  
Differential Cross ◽  
Top Quark ◽  
Differential Cross Sections ◽  
Heavy Boson

HEAVY LEPTON PAIR PRODUCTION FROM NEW Z’ RESONANCES

1987 ◽  
Vol 02 (04) ◽  
pp. 1189-1197
Author(s):  
J.L. Hewett ◽  
T.G. Rizzo
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Gauge Boson ◽  
Production Cross Section ◽  
Production Cross ◽  
Lepton Pair ◽  
Lepton Production ◽  
Heavy Lepton ◽  
Neutral Gauge Boson ◽  
Lepton Pair Production

We examine the possibility that heavy lepton pair production can be significantly enhanced by the existence of a new neutral gauge boson, Z’, at SSC energies. We find that in some models, the heavy lepton production cross section resulting from this mechanism exceeds that from production via other scenarios.

scholarly journals Spin configuration of top quark pair production with large extra dimensions at photon-photon colliders

2000 ◽  
Vol 61 (7) ◽  
Author(s):  
Kang Young Lee ◽  
Seong Chan Park ◽  
H. S. Song ◽  
JeongHyeon Song ◽  
Chaehyun Yu
Keyword(s):  
Pair Production ◽  
Top Quark ◽  
Extra Dimensions ◽  
Large Extra Dimensions ◽  
Spin Configuration

scholarly journals Resummed Differential Cross Sections for Top-Quark Pairs at the LHC

2016 ◽  
Vol 116 (20) ◽  
Author(s):  
Benjamin D. Pecjak ◽  
Darren J. Scott ◽  
Xing Wang ◽  
Li Lin Yang
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Top Quark ◽  
Differential Cross Sections ◽  
Quark Pairs ◽  
Top Quark Pairs
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