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The direct pair-production of the superpartner of the $\tau$-lepton, the $\widetilde{\tau}$, is one of the most interesting channels to search for SUSY in. First of all, the $\widetilde{\tau}$ is likely to be the lightest of the scalar…

High Energy Physics - Phenomenology · Physics 2021-05-19 M. T. Núñez Pardo de Vera , M. Berggren , J. List

Pair-production of the superpartner of the $\tau$-lepton, the $\tilde{\tau}$, is one of the most interesting channels to search for SUSY in: The $\tilde{\tau}$ is likely to be the lightest scalar lepton, and the signature of $\tilde{\tau}$…

High Energy Physics - Phenomenology · Physics 2022-10-13 M. T. Núñez Pardo de Vera , M. Berggren , J. List

One of the most interesting channels to search for SUSY is the direct pair-production of the $\tau$-lepton superpartner, $\widetilde{\tau}$. The $\widetilde{\tau}$ is with high probability the lightest of the scalar leptons, so one of the…

High Energy Physics - Phenomenology · Physics 2022-11-02 M. T. Núñez Pardo de Vera , M. Berggren , J. List

Charginos are expected to be the lightest observable supersymmetric particles in many of the supersymmetric models. In the scenario that lighter charginios are pair-produced at CERN LEP II, we present a straightforward procedure for…

High Energy Physics - Phenomenology · Physics 2007-05-23 S. Y. Choi

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…

High Energy Physics - Phenomenology · Physics 2016-11-02 M. Demirci , A. I. Ahmadov

The direct pair-production of the $\tilde{\tau}$, is one of the most interesting channels to search for SUSY in: the $\tilde{\tau}$ is likely to be the lightest of the scalar leptons, and the signature of $\tilde{\tau}$ pair production is…

High Energy Physics - Phenomenology · Physics 2026-04-15 Maria Teresa Núñez Pardo de Vera , Mikael Berggren , Jenny List

A search for charginos and neutralinos, predicted by supersymmetric theories, has been performed using a data sample of 57 pb-1 at centre-of-mass energies of 181-184 GeV taken with the OPAL detector at LEP. No evidence for chargino or…

High Energy Physics - Experiment · Physics 2008-11-26 The OPAL Collaboration , G. Abbiendi et al

We consider that the direct production of a single neutralino in proton-proton collision at the CERN Large Hadron Collider focusing on the lightest neutralino is possibly a candidate for the dark matter and escapes detection. We present a…

High Energy Physics - Phenomenology · Physics 2013-07-16 A. I. Ahmadov , M. Demirci

Data collected by the OPAL detector at LEP up to the highest energies of 209 GeV are analyzed to search for evidence of supersymmetric (SUSY) particle production. Chargino pair-production and neutralino associated production are considered…

High Energy Physics - Experiment · Physics 2007-05-23 Gabriella Pasztor

Chargino pair production via photon-photon collision is investigated in the Minimal Supersymmetric Standard Model at a future linear collider. The process is computed using all the possible diagrams at the next-to-leading order, including…

High Energy Physics - Phenomenology · Physics 2019-01-03 Nasuf Sonmez

The production of the lightest chargino pair from gluon-gluon fusion is studied in the minimal supersymmetric model(MSSM) at proton-proton colliders. We find that with the chosen parameters, the production rate of the subprocess can be over…

High Energy Physics - Phenomenology · Physics 2009-10-31 Ma Wen-Gan , Du Fei , Zhou Mian-Lai , Jiang Yi , Han Liang , Zhou Hong

If accessible at LEP II, chargino production is likely to be one of the few available supersymmetric signals for many years. We consider the prospects for the determination of fundamental supersymmetry parameters in such a scenario. The…

High Energy Physics - Phenomenology · Physics 2009-12-30 Jonathan L. Feng , Matthew J. Strassler

Charginos $\chi_1^\pm$ are expected to be the lightest observable supersymmetric particles in many supersymmetric models. We present a procedure which will allow to determine the chargino mixing angles and, subsequently, the fundamental…

High Energy Physics - Phenomenology · Physics 2016-08-15 S. Y. Choi , A. Djouadi , H. Dreiner , J. Kalinowski , P. M. Zerwas

In most supersymmetric theories, charginos $\tilde{\chi}^\pm_{1,2}$ belong to the class of the lightest supersymmetric particles and they are easy to observe at e^+e^- colliders. By measuring the total cross sections and the left-right…

High Energy Physics - Phenomenology · Physics 2007-05-23 S. Y. Choi

The direct pair-production of the superpartner of the $\tau$-lepton, the $\widetilde{\tau}$, is one of the most interesting channels to search for SUSY in: the $\widetilde{\tau}$ is likely to be the lightest of the scalar leptons, and is…

High Energy Physics - Phenomenology · Physics 2024-10-21 Mikael Berggren , Maria Teresa Núñez Pardo de Vera , Jenny List

We study the single chargino production $e^+ e^- \to \tilde \chi^{\pm} \mu^{\mp}$ at linear colliders which occurs through the $\l_{121}$ R-parity violating coupling constant. We focus on the final state containing 4 leptons and some…

High Energy Physics - Phenomenology · Physics 2007-05-23 G. Moreau

Approximately 438 pb-1 of e+e- data from the OPAL detector, taken with the LEP collider running at centre-of-mass energies of 192-209 Gev, are analyzed to search for evidence of chargino pair production, e+e- -> tilde chi^+_1 tilde chi^-_1,…

High Energy Physics - Experiment · Physics 2008-11-26 The OPAL collaboration , G. Abbiendi

Previously, in the context of the minimal supersymmetric standard model (without {\em a priori} assumptions of parameter unification), we studied the constraints on weak-scale SUSY parameters from chargino production at LEP II, using as…

High Energy Physics - Phenomenology · Physics 2009-10-28 Jonathan L. Feng , Matthew J. Strassler

We revisit the existing limits on the gaugino masses in various Supersymmetric (SUSY) scenarios derived from Run-I data of the LHC. These limits obtained from the various final states rely heavily on the simplified assumptions regarding the…

High Energy Physics - Phenomenology · Physics 2016-09-28 Arghya Choudhury , Subhadeep Mondal

We consider a specific class of events of the SUSY particle production at the LHC without missing p_T. Namely, we discuss the chargino pair production with a further decay into the W-boson and the neutralino when the masses of the chargino…

High Energy Physics - Phenomenology · Physics 2016-04-01 A. S. Belyaev , D. I. Kazakov , A. Sperling
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