RADIATIVE PRODUCTION OF LIGHTEST NEUTRALINOS IN e+e-COLLISIONS IN SUPERSYMMETRIC GRAND UNIFIED MODELS

We study the production of the lightest neutralinos in the radiative process [Formula: see text] in supersymmetric models with grand unification. We consider models wherein the standard model (SM) gauge group SU(3)c×SU(2)L×U(1)Yis unified into the grand unified gauge groups SU(5) or SO(10). We study this process at energies that may be accessible at a future International Linear Collider (ILC). We compare and contrast the dependence of the signal cross-section on the grand unified gauge group, and different representations of the grand unified gauge group, into which the SM gauge group is unified. We carry out a comprehensive study of the radiative production process which includes higher-order QED corrections in our calculations. In addition we carry out a detailed study of the background to the signal process coming from the SM radiative neutrino production [Formula: see text], as well as from the radiative production of the scalar partners of the neutrinos (sneutrinos) [Formula: see text]. The latter can be a major supersymmetric background to the radiative production of neutralinos when the sneutrinos decay invisibly. It is likely that the radiative production of the lightest neutralinos may be a viable channel to study supersymmetric partners of the SM particles at the first stage of an ILC, where heavier sparticles may be too heavy to be produced in pairs.

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LINEAR COLLIDER PHYSICS

International Journal of Modern Physics A ◽

10.1142/s0217751x0502879x ◽

2005 ◽

Vol 20 (22) ◽

pp. 5287-5296 ◽

Cited By ~ 1

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.

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

The European Physical Journal C ◽

10.1140/epjc/s10052-019-7375-2 ◽

2019 ◽

Vol 79 (10) ◽

Cited By ~ 4

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.

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

Modern Physics Letters A ◽

10.1142/s0217732311035845 ◽

2011 ◽

Vol 26 (21) ◽

pp. 1577-1586 ◽

Cited By ~ 2

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.

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

International Journal of Modern Physics A ◽

10.1142/s0217751x09046874 ◽

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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Beam Polarization at the ILC: Physics Case and Realization

International Journal of Modern Physics Conference Series ◽

10.1142/s201019451660003x ◽

2016 ◽

Vol 40 ◽

pp. 1660003 ◽

Cited By ~ 6

Author(s):

Annika Vauth ◽

Jenny List

Keyword(s):

Precision Measurement ◽

Linear Collider ◽

International Linear Collider ◽

New Physics ◽

Beam Polarization ◽

Technical Aspects ◽

Polarized Beams ◽

Physics Program ◽

The Standard Model ◽

The Creation

The International Linear Collider (ILC) is a proposed [Formula: see text] collider, focused on precision measurement of the Standard Model and new physics beyond. Polarized beams are a key element of the ILC physics program. The physics studies are accompanied by an extensive R&D program for the creation of the polarized beams and the measurement of their polarization. This contribution will review the advantages of using beam polarization and its technical aspects and realization, such as the creation of polarized beams and the measurement of the polarization.

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SPARTICLE MASS SPECTRUM IN GRAND UNIFIED THEORIES

International Journal of Modern Physics A ◽

10.1142/s0217751x07036889 ◽

2007 ◽

Vol 22 (19) ◽

pp. 3229-3259 ◽

Cited By ~ 39

Author(s):

B. ANANTHANARAYAN ◽

P. N. PANDITA

Keyword(s):

Mass Spectrum ◽

Gauge Group ◽

Gauge Groups ◽

Grand Unified Theories ◽

Renormalization Group Equations ◽

The Standard Model ◽

Unified Theories ◽

The One ◽

The Impact ◽

Standard Model Gauge Group

We carry out a detailed analysis of sparticle mass spectrum in supersymmetric grand unified theories. We consider the spectroscopy of the squarks and sleptons in SU (5) and SO (10) grand unified theories, and show how the underlying supersymmetry breaking parameters of these theories can be determined from a measurement of different sparticle masses. This analysis is done analytically by integrating the one-loop renormalization group equations with appropriate boundary conditions implied by the underlying grand unified gauge group. We also consider the impact of nonuniversal gaugino masses on the sparticle spectrum, especially the neutralino and chargino masses which arise in supersymmetric grand unified theories with nonminimal gauge kinetic function. In particular, we study the interrelationships between the squark and slepton masses which arise in grand unified theories at the one-loop level, which can be used to distinguish between the different underlying gauge groups and their breaking pattern to the Standard Model gauge group. We also comment on the corrections that can affect these one-loop results.

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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

Tạp chí Khoa học ◽

10.54607/hcmue.js.15.3.143(2018) ◽

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.

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