PROBING NEW GAUGE BOSON Z′ FROM THE LEFT–RIGHT TWIN HIGGS MODEL AT HIGH-ENERGY e+e- COLLIDERS

2009 ◽  
Vol 24 (06) ◽  
pp. 463-473 ◽  
Author(s):  
YAO-BEI LIU ◽  
LIN-LIN DU ◽  
QIN CHANG
Keyword(s):  
Gauge Boson ◽  
Confidence Level ◽  
High Energy ◽  
Higgs Model ◽  
Relative Correction ◽  
Neutral Gauge Boson ◽  
Absolute Value ◽  
Polarized Beams ◽  
The Future ◽  
The Absolute

The left–right twin Higgs (LRTH) model predicts the existence of the new neutral gauge boson Z′. In this paper, we calculate the contributions of this new particle to the processes e+e-→l+l-, [Formula: see text] and [Formula: see text] and study the possibility of detecting this new particle via these processes in the future high-energy linear e+e- collider (LC) experiments with [Formula: see text] and £ int = 340 fb-1, both for unpolarized and polarized beams. We find that the new gauge boson Z′ is most sensitive to the process [Formula: see text] with suitably polarized beams. As long as MZ′ ≤ 1.9 TeV , the absolute value of the relative correction parameter is larger than 5%. We calculate the forward–backward asymmetries for the process [Formula: see text], the results show that the possible signals of Z′ might be detected via measuring the deviations of A FB from its SM prediction for [Formula: see text]. Bounds on Z′ masses are also estimated within 95% confidence level. From our analysis, we conclude that the new gauge boson is most sensitive to the process [Formula: see text] and its virtual effects are most easy to be observed via this process in the future LC experiments.

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.

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 Top Partner Production at e+e- Collider in the Littlest Higgs Model with T-Parity

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Haiyan Wang ◽  
Bingfang Yang
Keyword(s):  
Pair Production ◽  
Cross Sections ◽  
High Energy ◽  
Higgs Model ◽  
Dilepton Channel ◽  
Associated Production ◽  
Production Processes ◽  
The Future ◽  
Signal Significance ◽  
The Cross

In the framework of the littlest Higgs Model with T-parity, we discuss the top partner production at future e+e- collider. We calculate the cross sections of the top partner production processes and associated production processes of Higgs and top partner under current constraints. Then, we investigate the observability of the T-odd top partner pair production through the process e+e-→T-T¯-→tt¯AHAH in the tt¯ dilepton channel for two T-odd top partner masses mT-=603  (708) GeV at s=1.5 TeV. We analyze the signal significance depending on the integrated luminosity and find that this signal is promising at the future high energy e+e- collider.

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.

Assessing the operational value of short-term forecast information under climate change

2020 ◽  
Author(s):  
Henrique Moreno Dumont Goulart ◽  
Matteo Giuliani ◽  
Jonathan Herman ◽  
Scott Steinschneider ◽  
Andrea Castelletti
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Forecast Error ◽  
Climate Scenario ◽  
Point Of View ◽  
Short Term ◽  
Absolute Value ◽  
The Future ◽  
The Absolute ◽  
Optimal Operating Policies

<p>Climate change is expected to increase the variability of hydrological regimes, generating more recurrent and intense floods and droughts. This trend will very likely diminish the resilience of reservoir systems in supplying water, controlling floods, and generating energy. While forecast information has proven valuable for improving water systems operations under stationary hydroclimatic conditions, little is known about its potential value in more variable regimes and its capacity in mitigating the increased risks. In this work, we propose a framework to quantify the future operational value of forecast information under different climate change projections. Specifically, a stochastic model replicating observed forecast error is calibrated over a hindcast dataset from the Subseasonal to Seasonal (S2S) prediction project and used to generate synthetic forecasts for future hydrologic scenarios. Then, a policy search routine is used to design optimal operating policies informed by the forecast information. The forecast operational value is quantified by comparing the performance of these policies against a baseline solution not informed by any forecast and an upper bound solution which uses perfect knowledge of the future. This experiment is performed on a case study of Folsom Reservoir, California. Results indicate that the use of forecasts can improve future operations both in terms of water supply and flood control. We assess the forecast value in two distinct forms: the absolute value, which is the total gain generated by the use of forecast information and aligns with the provider point of view, and the relative value, which measures the gain with respect to the no-forecast case and relates to the reservoir operator perspective. The absolute value of forecasts is projected to increase for all selected scenarios. Conversely, projected relative forecast value depends on the nature of the climate scenario, increasing in wet scenarios while decreasing in dry scenarios. This experiment suggests that risks associated with increasing precipitation variability on seasonal to interannual timescales can be at least partially mitigated by the use of short-term forecasts. Future work will consider the potential for the forecast error structure to change over time as a result of climate change and improved weather models.</p>

POLARIZED BEAMS IN THE HIGH-ENERGY STORAGE RING OF THE FUTURE GSI PROJECT

Spin 2004 ◽  
2005 ◽  
Author(s):  
A. LEHRACH ◽  
R. MAIER ◽  
D. PRASUHN ◽  
I. KOOP ◽  
A. OTBOYEV ◽  
...  
Keyword(s):  
Energy Storage ◽  
Storage Ring ◽  
High Energy ◽  
Polarized Beams ◽  
The Future ◽  
High Energy Storage

PRODUCTION OF $ht\bar{t}$ AND $ht\bar{T}$ IN THE LEFT–RIGHT TWIN HIGGS MODEL IN γγ COLLISIONS AT ILC

2011 ◽  
Vol 26 (30n31) ◽  
pp. 5133-5142 ◽  
Author(s):  
JIE-FEN SHEN ◽  
YAO-BEI LIU
Keyword(s):  
Production Process ◽  
Cross Section ◽  
Phenomenological Analysis ◽  
Higgs Model ◽  
New Production ◽  
Parameter Spaces ◽  
Relative Correction ◽  
Decay Modes ◽  
Text Production ◽  
The Absolute

In the left–right twin Higgs (LRTH) model, we first examine the effects in [Formula: see text] production in γγ collision and find that, in the favorable parameter spaces, the absolute values of the relative correction can be significantly large. We also estimate the new production process [Formula: see text], our results show that its cross-section can reach the level of a few fb for M = 150 GeV . A simply phenomenological analysis is also given for the decay modes T→ϕ+b and T→W+b. As long as the new T-quark is not too heavy, we conclude that this new channel might be used to test the LRTH model in the future ILC experiment.

Smart Estimation Ver-H.1.0

2018 ◽  
Author(s):  
Sigit Haryadi
Keyword(s):  
Sample Size ◽  
Confidence Level ◽  
Time Span ◽  
Regression Equation ◽  
Weight Factor ◽  
The Past ◽  
Level Of Confidence ◽  
The Future ◽  
Future Value ◽  
The Difference

We cannot be sure exactly what will happen, we can only estimate by using a particular method, where each method must have the formula to create a regression equation and a formula to calculate the confidence level of the estimated value. This paper conveys a method of estimating the future values, in which the formula for creating a regression equation is based on the assumption that the future value will depend on the difference of the past values divided by a weight factor which corresponding to the time span to the present, and the formula for calculating the level of confidence is to use "the Haryadi Index". The advantage of this method is to remain accurate regardless of the sample size and may ignore the past value that is considered irrelevant.

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