Search for neutralino pair production at the CERN LHC

Demirci, Mehmet; Ahmadov, A. I.

doi:10.1103/physrevd.89.075015

Cited by 11 publications

(5 citation statements)

References 41 publications

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“…The analytical results of the squared amplitude are provided by FormCalc. The scalar integrals in ‡ Using the same tools, we have previously done a few more recent studies [38][39][40] and achieved significant results. loop amplitudes are evaluated by LoopTools [36].…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Associated production of Higgs boson with a photon at electron-positron colliders

Demirci

2019

Phys. Rev. D

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A complete one-loop prediction for the single production of the neutral Higgs bosons in association with a photon in electron-positron collisions is presented in the framework MSSM, paying special attention to the individual contribution from each type of diagram. This process has no amplitude at tree level and is hence directly sensitive to one-loop impacts and the underlying dynamics of Higgs. In order to investigate the effect of the new physics, four different scenarios, which include a Higgs boson with mass and couplings consistent with those of the discovered Higgs boson and a considerable part of parameter space allowed by the bounds from the researches for additional Higgs bosons and sparticles, are chosen in the MSSM. The dependence of the cross section in both SM and MSSM on the center-of-mass energy is examined by considering the polarizations of the initial electron and positron beams. The effect of individual contributions from each type of oneloop diagrams on the total cross section is also investigated in detail. Furthermore, the total cross section of e − e + → γh 0 as well as e − e + → γA 0 are scanned over the plane mA − tan β for each scenario. The full one-loop contributions are crucial for the analysis of BSM physics at a future electron-positron collider. 12.60.Jv, 13.66.Fg, 14.80.Da * The diagrams were drawn by using JaxoDraw [32,33].

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Section: Theoretical Frameworkmentioning

confidence: 99%

Associated production of Higgs boson with a photon at electron-positron colliders

Demirci

2019

Phys. Rev. D

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“…In this section, we briefly give some details regarding our method and input parameters. During our numerical evaluations, we have considered the assumptions and approaches in our previous works [23,38,39] for the gaugino/Higgsino sector. The soft SUSY-breaking gaugino mass parameters M 1 related to the U (1), M 2 related to the SU (2), and the Higgsino mass parameter µ could be taken to be real and positive.…”

Section: Parameter Settingsmentioning

confidence: 99%

“…In scenarios where masses of colored sparticles are larger than a few TeV, the direct production of neutralinos and charginos can be the dominant process of SUSY at the LHC. However, this production mode at the LHC suffers from both relatively small rates and large SM backgrounds [21][22][23]. This motivates the complementary experiments at future linear colliders with low backgrounds and easy signal reconstruction.…”

Section: Introductionmentioning

confidence: 99%

Neutralino pair production via photon-photon collisions at the ILC

Demirci¹,

Ahmadov²

2016

Phys. Rev. D

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We provide complete one-loop predictions for the direct production of the neutralino pairs via photon-photon collisions which appears for the first time at one-loop level in the minimal supersymmetric standard model at the International Linear Collider. We present a comprehensive investigation of the dependence of total cross section on the center-of-mass energy and the tanβ for three different scenarios based on gaugino/Higgsino fractions of the neutralinos. Furthermore, by investigating the behavior with the most relevant parameters µ and M2, we exhibit regions of the parameter space where the enhancement of the cross section is large enough to be detectable at linear colliders. Our analysis shows that the corresponding production cross section reaches its highest values when the lightest neutralino χ 0 1 has a dominant Higgsino component and/or the next-to-lightest neutralino χ 0 2 has a dominant gaugino component.

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“…The collision of spin-polarized protons leads to the formation of pines -neutral particles, the trajectory of which depends on the properties of gluons in the proton [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Proton-proton Collision at High Energies

Alizada

2019

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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The presented work effective section of neutralino birth calculated for proton-proton collision at high energies. Proton-proton collision is considered in parton model and Feynman diagram was used in calculations. One of possible process: a process with γ photon formation was considered. It is shown that an effective section of process with unpolarized and polarized protons is different. The ratio of effective sections of process with unpolarized and polarized protons is 1-λ1λ2. The energy spectrum of neutralino born has been studied. The spectrum has an asymmetric shape and is shallow towards lower energies. The maximum value of the spectrum increases exponentially as the energy of proton collision increases.

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Search for neutralino pair production at the CERN LHC

Cited by 11 publications

References 41 publications

Associated production of Higgs boson with a photon at electron-positron colliders

Associated production of Higgs boson with a photon at electron-positron colliders

Neutralino pair production via photon-photon collisions at the ILC

Proton-proton Collision at High Energies

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