scholarly journals Full . Full O(α) electroweak radiative corrections to e^+ e^-→ZH with beam polarizations at the ILCO(α) electroweak radiative corrections to e^+ e^-→ZH with beam polarizations at the ILC

2019 ◽  
Vol 15 (3) ◽  
pp. 24
Author(s):  
Phan Hong Khiem ◽  
Pham Nguyen Hoang Thinh
Keyword(s):  
Cross Section ◽  
Linear Collider ◽  
International Linear Collider ◽  
Gauge Parameter ◽  
Beyond The Standard Model ◽  
Radiative Corrections ◽  
Electroweak Radiative Corrections ◽  
The Standard Model ◽  
Parameter Independence ◽  
The Impact

We present full  electroweak radiative corrections to  with the initial beam polarizations at the International Linear Collider (ILC). The calculation is checked numerically by using three consistency tests that are ultraviolet finiteness, infrared finiteness, and gauge parameter independence. In phenomenological results, we study the impact of the electroweak corrections to total cross section as well as its distributions. In addition, we discuss the possibility of searching  for an additional Higgs in arbitrary beyond the Standard Model (BSM) through ZH production at the ILC.

$e^+e^-\gamma$ production at photon-photon colliders at complete electroweak NLO accuracy

2021 ◽  
Author(s):  
He-Yi Li ◽  
Ren-You Zhang ◽  
Wen-Gan Ma ◽  
Yi Jiang ◽  
Xiao-Zhou Li
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Linear Collider ◽  
Experimental Studies ◽  
High Energy ◽  
Radiative Corrections ◽  
High Energy Gamma ◽  
Electroweak Radiative Corrections ◽  
Energy Gamma ◽  
Beam Luminosity

Abstract We present the full NLO electroweak radiative corrections to $e^+e^-\gamma$ production in $\gamma\gamma$ collision, which is an ideal channel for calibrating the beam luminosity of Photon Linear Collider. We analyse the dependence of the total cross section on the beam colliding energy, and investigate the kinematic distributions of final particles at various initial photon beam polarizations at EW NLO accuracy. The numerical results show that the EW relative corrections to the total cross section are non-negligible and become more and more significant as the increase of the beam colliding energy, even can exceed $-10\%$ in $\text{J} = 2$ $\gamma\gamma$ collision at $\sqrt{\hat{s}}=1~ \text{TeV}$. Such EW corrections are very important and should be taken into consideration in precision theoretical and experimental studies at high-energy $\gamma\gamma$ colliders.

scholarly journals LINEAR COLLIDER PHYSICS

2005 ◽  
Vol 20 (22) ◽  
pp. 5287-5296 ◽  
Author(s):  
DAVID J. MILLER
Keyword(s):  
Top Quark ◽  
Linear Collider ◽  
International Linear Collider ◽  
Beyond The Standard Model ◽  
Top Quark Mass ◽  
Search Range ◽  
Light Higgs Boson ◽  
The Standard Model ◽  
Electroweak Sector ◽  
Complementary Set

The International Linear Collider has a rich physics programme, whatever lies beyond the standard model. Accurate measurement of the top quark mass is needed to constrain the model or its extensions. If there is a light Higgs boson the LHC should see it, but the ILC will pin down its characteristics and test them against model predictions. If Supersymmetric particles appear the ILC will measure a complementary set of them to those seen at the LHC, and may allow extrapolation to the Grand Unified scale. And if a strong electroweak sector is indicated the ILC will be sensitive to the presence of new structures in difermion and diboson systems up to higher masses than the direct search range of the LHC. Beyond the LHC and ILC there could be need for a multi TeV lepton collider.

ASSOCIATED PRODUCTION OF LIGHT PSEUDOSCALAR BOSON η WITH TOP QUARK PAIRS IN THE SLH MODEL AT THE ILC

2011 ◽  
Vol 26 (21) ◽  
pp. 1577-1586 ◽  
Author(s):  
JINZHONG HAN ◽  
DAPENG YANG ◽  
XUELEI WANG
Keyword(s):  
Standard Model ◽  
Cross Section ◽  
Cross Sections ◽  
Top Quark ◽  
Linear Collider ◽  
International Linear Collider ◽  
Quark Pairs ◽  
Associated Production ◽  
The Standard Model ◽  
The Cross

The light pseudoscalar boson η is the typical particle predicted by the Simplest Little Higgs (SLH) model. In this paper, we investigate some processes of the associated production of a light pseudoscalar boson η with a pair of top quarks in the SLH model at the International Linear Collider (ILC), i.e. [Formula: see text] and [Formula: see text]. We find that the cross-sections of these two processes could reach [Formula: see text] fb in the favorite parameter space in the SLH model, which is consistent with the results of the cross-section of [Formula: see text] in the standard model and the cross-section of [Formula: see text] in the minimal supersymmetric standard model. It should be clear that hundreds to thousands of η can be produced at the ILC per year, these processes of [Formula: see text] are really interesting in testing the standard model and searching the signs of the SLH model.

PROBING THE LEFT–RIGHT TWIN HIGGS MODEL VIA PROCESS $e^{+}e^{-}\rightarrow b\bar{b}$ AT THE ILC

2012 ◽  
Vol 27 (07) ◽  
pp. 1250024
Author(s):  
DAPENG YANG ◽  
BINGFANG YANG ◽  
BIN XU
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Production Cross Section ◽  
Linear Collider ◽  
Production Cross ◽  
Bottom Quark ◽  
International Linear Collider ◽  
Higgs Model ◽  
Tree Level ◽  
Pair Production Cross Section

In the framework of the Left–Right Twin Higgs model, we studied the bottom-quark pair production via e+e- collision at the International Linear Collider. We calculated the bottom-quark pair production cross-section at tree level and the relevant differential distributions. The relative correction of the production cross-section is significant and the result will be a sensitive probe of the Left–Right Twin Higgs model.

scholarly journals THE EFFECT OF ELECTROMAGNETIC PROPERTIES OF NEUTRINOS ON THE PHOTON–NEUTRINO DECOUPLING TEMPERATURE

2012 ◽  
Vol 27 (32) ◽  
pp. 1250187
Author(s):  
S. C. İNAN ◽  
M. KÖKSAL
Keyword(s):  
Lagrangian Model ◽  
Electromagnetic Properties ◽  
Beyond The Standard Model ◽  
Ultrahigh Energy ◽  
Qcd Phase Transition ◽  
Effective Lagrangian ◽  
Independent Analysis ◽  
The Standard Model ◽  
Model Independent ◽  
The Impact

We examine the impact of electromagnetic properties of neutrinos on the annihilation of relic neutrinos with ultrahigh energy cosmic neutrinos for the [Formula: see text] process. For this process, photon–neutrino decoupling temperature is calculated via effective Lagrangian model beyond the standard model. We find that photon–neutrino decoupling temperature can be importantly reduced below the QCD phase transition with the model independent analysis defining electromagnetic properties of neutrinos.

scholarly journals FINITE-WIDTH EFFECTS IN THE NEAR-THRESHOLD ZZZ AND ZWW PRODUCTION AT ILC

2011 ◽  
Vol 26 (15) ◽  
pp. 1075-1093 ◽  
Author(s):  
ROMAN PASECHNIK ◽  
VLADIMIR KUKSA
Keyword(s):  
Higgs Boson ◽  
Cross Section ◽  
Principal Part ◽  
Mass Shell ◽  
Linear Collider ◽  
International Linear Collider ◽  
Finite Width ◽  
Leading Order ◽  
Unstable Particles ◽  
Near Threshold

We calculate the cross-section of the near-threshold off-shell ZZZ and ZW+W-production at the International Linear Collider taking into account their instability and the principal part of next-to-leading order corrections. The calculations are performed in the framework of the model of unstable particles with smeared mass-shell. We show that the contribution of the finite Z/W and H widths (their instability) is large in the Higgs resonance range (about -24% and -18% for ZZZ and ZW+W-, respectively, at [Formula: see text]) and should be taken into account in the Higgs boson studies at the future International Linear Collider.

scholarly journals Forward–backward asymmetry in the gauge-Higgs unification at the International Linear Collider

2019 ◽  
Vol 79 (10) ◽  
Author(s):  
Shuichiro Funatsu
Keyword(s):  
Standard Model ◽  
Linear Collider ◽  
International Linear Collider ◽  
Gauge Bosons ◽  
Fermion Pair ◽  
Negative Case ◽  
The Standard Model ◽  
Model Predictions ◽  
Kaluza Klein ◽  
Polarised Beams

Abstract The signals of the $$SO(5)\times U(1)$$SO(5)×U(1) gauge-Higgs unification model at the International Linear Collider are studied. In this model, Kaluza–Klein modes of the neutral gauge bosons affect fermion pair productions. The deviations of the forward–backward asymmetries of the $$e^+e^-\rightarrow \bar{b}b$$e+e-→b¯b, $$\bar{t}t$$t¯t processes from the standard model predictions are clearly seen by using polarised beams. The deviations of these values are predicted for two cases, the bulk mass parameters of quarks are positive and negative case.

scholarly journals DARK MATTER CANDIDATE FROM CONFORMALITY

2007 ◽  
Vol 22 (13) ◽  
pp. 931-937 ◽  
Author(s):  
P. H. FRAMPTON
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Cross Section ◽  
Weak Interaction ◽  
Gauge Theories ◽  
Dark Matter Candidate ◽  
Beyond The Standard Model ◽  
The Standard Model ◽  
Relic Density ◽  
Baryonic Dark Matter

Abelian quiver gauge theories provide candidates for the conformality approach to physics beyond the standard model which possess novel cancellation mechanisms for quadratic divergences. A Z2 symmetry ( R parity) can be imposed and leads naturally to a dark matter candidate which is the Lightest Conformality Particle (LCP), a neutral spin-1 / 2 state with weak interaction annihilation cross-section, mass in the 100 GeV region and relic density of non-baryonic dark matter Ωdm which can be consistent with the observed value Ωdm≃0.24.

THE GAMMA–GAMMA INTERACTION: A CRITICAL TEST OF THE STANDARD MODEL

2009 ◽  
Vol 24 (18n19) ◽  
pp. 3276-3285
Author(s):  
PHILIP YOCK
Keyword(s):  
Standard Model ◽  
Linear Collider ◽  
International Linear Collider ◽  
Strong Interactions ◽  
Acceleration Technique ◽  
Wakefield Acceleration ◽  
Electron Positron ◽  
Proposed Model ◽  
The Standard Model ◽  
Order Of Magnitude

Data from the Large Electron Positron collider (LEP) at CERN on hadron production in gamma-gamma interactions exceed the predictions of the standard model by an order of magnitude at the highest observed transverse momenta in three channels. The amplitude for the process is asymptotically proportional to the sum of the squares of the charges of quarks. The data are suggestive of models where quarks have unit charges, or larger, and where partons have substructure. A previously proposed model of electro-strong interactions includes both these features. Definitive measurements could be made with either of the linear electron-positron colliders that have been proposed, viz. the International Linear Collider (ILC) or the Compact Linear Collider (CLIC). However, an electron-electron collider employing the recently developed "plasma wakefield" acceleration technique could provide the most affordable option. An independent check of the multi-muon events that were recently reported at Fermilab could also be made with this type of collider.

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