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Determining the parameters of the Minimal Supergravity Model from 2l + $E_T ^{miss}$ + (jets) final states at LHC
We analyse the events with two same-flavour, opposite-sign leptons + $E_T^{miss}$ + (jets) as expected in pp collisions at LHC within the framework of the minimal Supergravity Model. The objective is the determination of the parameters m_0 and m_{1/2} of this model (for a given value of $\tan\beta$)...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
1997
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.58.095010 http://cds.cern.ch/record/687237 |
_version_ | 1780901715942309888 |
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author | Denegri, D. Majerotto, W. Rurua, L. |
author_facet | Denegri, D. Majerotto, W. Rurua, L. |
author_sort | Denegri, D. |
collection | CERN |
description | We analyse the events with two same-flavour, opposite-sign leptons + $E_T^{miss}$ + (jets) as expected in pp collisions at LHC within the framework of the minimal Supergravity Model. The objective is the determination of the parameters m_0 and m_{1/2} of this model (for a given value of $\tan\beta$). The signature $l^+ l^- + E_T^{miss}$ + (jets) selects the leptonic decays of $\tilde{\chi}^0_2$, $\tilde{\chi}^0_2 \to \tilde{\chi}^0_1 l^+ l^- $, $\tilde{\chi}^0_2 \to \tilde{l}_{L,R}^{\pm} l^{\mp} \to \tilde{\chi}^0_1 l^+ l^-$. We exploit the fact that the invariant dilepton mass distribution has a pronounced structure with a sharp edge at the kinematical endpoint even in such an inclusive final state over a significant part of parameter space. We determine the domain of parameter space where the edge is expected to be visible. We show that a measurement of this edge already constrains the model parameters essentially to three lines in the ($m_0, m_{1/2}$) parameter plane. We work out a strategy to discriminate between the three-body leptonic decays of $\tilde{\chi}^0_2$ and the decays into sleptons $\tilde{l}_{L,R}$. This procedure may make it possible to get information on SUSY particle masses already with low luminosity, $L_{int}=10^3 pb^{-1}$. |
id | cern-687237 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1997 |
record_format | invenio |
spelling | cern-6872372023-03-14T18:55:18Zdoi:10.1103/PhysRevD.58.095010http://cds.cern.ch/record/687237engDenegri, D.Majerotto, W.Rurua, L.Determining the parameters of the Minimal Supergravity Model from 2l + $E_T ^{miss}$ + (jets) final states at LHCParticle Physics - PhenomenologyDetectors and Experimental TechniquesWe analyse the events with two same-flavour, opposite-sign leptons + $E_T^{miss}$ + (jets) as expected in pp collisions at LHC within the framework of the minimal Supergravity Model. The objective is the determination of the parameters m_0 and m_{1/2} of this model (for a given value of $\tan\beta$). The signature $l^+ l^- + E_T^{miss}$ + (jets) selects the leptonic decays of $\tilde{\chi}^0_2$, $\tilde{\chi}^0_2 \to \tilde{\chi}^0_1 l^+ l^- $, $\tilde{\chi}^0_2 \to \tilde{l}_{L,R}^{\pm} l^{\mp} \to \tilde{\chi}^0_1 l^+ l^-$. We exploit the fact that the invariant dilepton mass distribution has a pronounced structure with a sharp edge at the kinematical endpoint even in such an inclusive final state over a significant part of parameter space. We determine the domain of parameter space where the edge is expected to be visible. We show that a measurement of this edge already constrains the model parameters essentially to three lines in the ($m_0, m_{1/2}$) parameter plane. We work out a strategy to discriminate between the three-body leptonic decays of $\tilde{\chi}^0_2$ and the decays into sleptons $\tilde{l}_{L,R}$. This procedure may make it possible to get information on SUSY particle masses already with low luminosity, $L_{int}=10^3 pb^{-1}$.We analyse the events with two same-flavour, opposite-sign leptons + $E_T^{miss}$ + (jets) as expected in pp collisions at LHC within the framework of the minimal Supergravity Model. The objective is the determination of the parameters m_0 and m_{1/2} of this model (for a given value of $\tan\beta$). The signature $l^+ l^- + E_T^{miss}$ + (jets) selects the leptonic decays of $\tilde{\chi}^0_2$, $\tilde{\chi}^0_2 \to \tilde{\chi}^0_1 l^+ l^- $, $\tilde{\chi}^0_2 \to \tilde{l}_{L,R}^{\pm} l^{\mp} \to \tilde{\chi}^0_1 l^+ l^-$. We exploit the fact that the invariant dilepton mass distribution has a pronounced structure with a sharp edge at the kinematical endpoint even in such an inclusive final state over a significant part of parameter space. We determine the domain of parameter space where the edge is expected to be visible. We show that a measurement of this edge already constrains the model parameters essentially to three lines in the ($m_0, m_{1/2}$) parameter plane. We work out a strategy to discriminate between the three-body leptonic decays of $\tilde{\chi}^0_2$ and the decays into sleptons $\tilde{l}_{L,R}$. This procedure may make it possible to get information on SUSY particle masses already with low luminosity, L_{int}=10^3 pb^{-1}.hep-ph/9711357CMS-NOTE-1997-094HEPHY-PUB-678-97CMS-NOTE-1997-094HEPHY-PUB-678oai:cds.cern.ch:6872371997-11-17 |
spellingShingle | Particle Physics - Phenomenology Detectors and Experimental Techniques Denegri, D. Majerotto, W. Rurua, L. Determining the parameters of the Minimal Supergravity Model from 2l + $E_T ^{miss}$ + (jets) final states at LHC |
title | Determining the parameters of the Minimal Supergravity Model from 2l + $E_T ^{miss}$ + (jets) final states at LHC |
title_full | Determining the parameters of the Minimal Supergravity Model from 2l + $E_T ^{miss}$ + (jets) final states at LHC |
title_fullStr | Determining the parameters of the Minimal Supergravity Model from 2l + $E_T ^{miss}$ + (jets) final states at LHC |
title_full_unstemmed | Determining the parameters of the Minimal Supergravity Model from 2l + $E_T ^{miss}$ + (jets) final states at LHC |
title_short | Determining the parameters of the Minimal Supergravity Model from 2l + $E_T ^{miss}$ + (jets) final states at LHC |
title_sort | determining the parameters of the minimal supergravity model from 2l + $e_t ^{miss}$ + (jets) final states at lhc |
topic | Particle Physics - Phenomenology Detectors and Experimental Techniques |
url | https://dx.doi.org/10.1103/PhysRevD.58.095010 http://cds.cern.ch/record/687237 |
work_keys_str_mv | AT denegrid determiningtheparametersoftheminimalsupergravitymodelfrom2letmissjetsfinalstatesatlhc AT majerottow determiningtheparametersoftheminimalsupergravitymodelfrom2letmissjetsfinalstatesatlhc AT rurual determiningtheparametersoftheminimalsupergravitymodelfrom2letmissjetsfinalstatesatlhc |