Search For Supersymmetry In Proton Proton Collisions At 7 Tev In Events With A Single Lepton B Tagged Jets And Missing Transverse Momentum At The Lhc Using Data Collected From The Cms Detector
DOWNLOAD
Download Search For Supersymmetry In Proton Proton Collisions At 7 Tev In Events With A Single Lepton B Tagged Jets And Missing Transverse Momentum At The Lhc Using Data Collected From The Cms Detector PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Search For Supersymmetry In Proton Proton Collisions At 7 Tev In Events With A Single Lepton B Tagged Jets And Missing Transverse Momentum At The Lhc Using Data Collected From The Cms Detector book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Search For Supersymmetry In Proton Proton Collisions At 7 Tev In Events With A Single Lepton B Tagged Jets And Missing Transverse Momentum At The Lhc Using Data Collected From The Cms Detector
DOWNLOAD
Author : Wing Howard To
language : en
Publisher:
Release Date : 2013
Search For Supersymmetry In Proton Proton Collisions At 7 Tev In Events With A Single Lepton B Tagged Jets And Missing Transverse Momentum At The Lhc Using Data Collected From The Cms Detector written by Wing Howard To and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
This thesis describes a search for supersymmetry (SUSY) at the Large Hadron Collider using data collected in Run 2011 at center of mass energy of 7 TeV by the Compact Muon Solenoid detector with an integrated luminosity of 4.98 $fb{-1}$. First, the Large Hadron Collider is briefly described along with the Compact Muon Solenoid detector. Second, the Standard Model of particle physics is described which leads to the motivations for supersymmetry and its description. Finally, a search for supersymmetry in events with a single lepton, 2 b-tagged jets and missing transverse energy is documented in detail. The results are used to predict the yields from the standard model in bins missing transverse energy (\met) and total transverse hadronic energy (HT). Limits are set using these results using a minimal supergravity SUSY model and simplified model spectra SUSY model.
Cern Courier
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2016
Cern Courier written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Nuclear energy categories.
Search For Supersymmetry In Events With One Lepton And Multiple Jets In Proton Proton Collisions At Sqrt S
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2016
Search For Supersymmetry In Events With One Lepton And Multiple Jets In Proton Proton Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
A search for supersymmetry is performed in events with a single electron or muon in proton-proton collisions at a center-of-mass energy of 13 TeV. The data were recorded by the CMS experiment at the LHC and correspond to an integrated luminosity of 2.3 inverse femtobarns. Several exclusive search regions are defined based on the number of jets and b-tagged jets, the scalar sum of the jet transverse momenta, and the scalar sum of the missing transverse momentum and the transverse momentum of the lepton. The observed event yields in data are consistent with the expected backgrounds from standard model processes. The results are interpreted using two simplified models of supersymmetric particle spectra, both of which describe gluino pair production. In the first model, each gluino decays via a three-body process to top quarks and a neutralino, which is associated with the observed missing transverse momentum in the event. Gluinos with masses up to 1.6 TeV are excluded for neutralino masses below 600 GeV. In the second model, each gluino decays via a three-body process to two light quarks and a chargino, which subsequently decays to a W boson and a neutralino. The mass of the chargino is taken to be midway between the gluino and neutralino masses. In this model, gluinos with masses below 1.4 TeV are excluded for neutralino masses below 700 GeV.
Search For Supersymmetry In Events With B Jets And Missing Transverse Momentum At The Lhc
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2011
Search For Supersymmetry In Events With B Jets And Missing Transverse Momentum At The Lhc written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A search for supersymmetry is presented using a sample of events with b jets and missing transverse momentum. The search uses a data sample of proton-proton collisions at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 35 inverse picobarns, collected with the CMS detector. A total of 0.33 +0.43 -0.33 (stat.) +/- 0.13 (syst.) events is predicted, using control samples in the data, to arise from standard model processes, and one event is observed in the data. Upper limits are set at the 95% confidence level on the cross sections of benchmark supersymmetric models.
A Search For Supersymmetry In Events With Jets And Missing Momentum Using Data Collected By The Cms Detector At 13 Tev
DOWNLOAD
Author : Sam Daniel Mullin
language : en
Publisher:
Release Date : 2016
A Search For Supersymmetry In Events With Jets And Missing Momentum Using Data Collected By The Cms Detector At 13 Tev written by Sam Daniel Mullin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
As successful as the Standard Model of particle physics has been it still has several major shortcomings which range from unanswered theoretical questions to a lack of any explanation for observed phenomena such as dark matter. One proposed theory for physics beyond the Standard Model which provides solutions for some of these issues is supersymmetry. This dissertation presents a search for supersymmetry using 2.3 fb -1 of proton-proton collision data. This data was collected at a center-of-mass energy of 13 TeV by the CMS detector at the LHC during 2015. This search focuses on top squark pair production where the produced stops both decay to an all hadronic final state. These decays are characterized by multiple jets and missing transverse momentum. A baseline search region is defined to be sensitive to signal processes which occur at rates many orders of magnitude lower than Standard Model processes. The sensitivity to various signal models is improved by dividing this baseline region into distinct categories. Events with an unreconstructed lepton from leptonic W boson decays constitute the primary background. There are also significant contributions from events where a Z boson decays invisibly to neutrinos especially in bins with higher missing transverse momentum. Events with multijet production where one jet has been severely mis-measured as well as those with a pair of top quarks and an invisibly decaying Z boson also have a small presence in the search region. The contributions from these processes to the search region is estimated using data control regions. No statistically significant deviations from the predicted background yields are observed. The results are interpreted in terms of exclusion limits using the Simplified Model Spectrum framework. Stop and neutralino masses are probed up to 780 GeV and 260 GeV respectively.
Search For Supersymmetry In Pp Collisions At Sqrt S
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2011
Search For Supersymmetry In Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Results are reported from a search for physics beyond the standard model in proton-proton collisions at a center-of-mass energy of 7 TeV, focusing on the signature with a single, isolated, high-transverse-momentum lepton (electron or muon), energetic jets, and large missing transverse momentum. The data sample comprises an integrated luminosity of 36 inverse picobarns, recorded by the CMS experiment at the LHC. The search is motivated by models of new physics, including supersymmetry. The observed event yields are consistent with standard model backgrounds predicted using control samples obtained from the data. The characteristics of the event sample are consistent with those expected for the production of t t-bar and W +jets events. The results are interpreted in terms of limits on the parameter space for the constrained minimal supersymmetric extension of the standard model.
Search For Supersymmetry In The Multijet And Missing Transverse Momentum Final State In Pp Collisions At 13 Tev
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2016
Search For Supersymmetry In The Multijet And Missing Transverse Momentum Final State In Pp Collisions At 13 Tev written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
A search for new physics is performed based on all-hadronic events with large missing transverse momentum produced in proton-proton collisions at sqrt(s)=13 TeV. The data sample, corresponding to an integrated luminosity of 2.3 inverse femtobarns, was collected with the CMS detector at the CERN LHC in 2015. The data are examined in search regions of jet multiplicity, tagged bottom quark jet multiplicity, missing transverse momentum, and the scalar sum of jet transverse momenta. The observed numbers of events in all search regions are found to be consistent with the expectations from standard model processes. Exclusion limits are presented for simplified supersymmetric models of gluino pair production. Depending on the assumed gluino decay mechanism, and for a massless, weakly interacting, lightest neutralino, lower limits on the gluino mass from 1440 to 1600 GeV are obtained, significantly extending previous limits.
Search For Supersymmetry In The Jets Met Taus Final State Using The Cms Detector At The Lhc
DOWNLOAD
Author : Roy Joaquin Montalvo
language : en
Publisher:
Release Date : 2013
Search For Supersymmetry In The Jets Met Taus Final State Using The Cms Detector At The Lhc written by Roy Joaquin Montalvo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
In this dissertation results are presented from a search for the pair production of heavy colored particles (gluinos, squarks) in R-parity conserving supersymmetric models, in which the lightest supersymmetric particle is a stable and neutral object. The search was performed for events with at least two tau leptons, two highly energetic jets and large missing transverse momentum in the final state on a data sample of proton-proton collisions at sqrt(s) = 7 TeV. The data sample was collected by the Compact Muon Solenoid detector at the Large Hadron Collider in 2011, and it corresponds to an integrated luminosity of 5fb -1. The tau isolation variable was optimized for this search. The number of events corresponding to standard model processes in the final selection was estimated to be 7.49 plus - minus 0.74 using background estimation techniques based on data. Nine observed events are found to be in agreement with the standard model prediction, and exclusion limits on gluino mass are obtained in the context of supersymmetric models at the 95% confidence level. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/149247
Search For Supersymmetry In Events With A Single Lepton Jets And Missing Transverse Momentum Using A Neural Network
DOWNLOAD
Author : Avishek Chatterjee
language : en
Publisher:
Release Date : 2013
Search For Supersymmetry In Events With A Single Lepton Jets And Missing Transverse Momentum Using A Neural Network written by Avishek Chatterjee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
A search for supersymmetry in proton-proton collisions at [SQUARE ROOT] s = 7 TeV is presented, focusing on events with a single isolated lepton, energetic jets, and large missing transverse momentum. The analyzed data corresponds to a total integrated luminosity of 4.98 fb[-]1 recorded by the CMS experiment. The search uses an artificial neural network to suppress Standard Model backgrounds, and estimates residual backgrounds using a fully data-driven method. The analysis is performed in both the muon and electron channels, and the combined result is interpreted in terms of limits on the CMSSM parameter space, as well as a simplified model.
Search For Supersymmetry In The One Lepton Channel At The Lhc
DOWNLOAD
Author : Arun Preston Luthra
language : en
Publisher:
Release Date : 2013
Search For Supersymmetry In The One Lepton Channel At The Lhc written by Arun Preston Luthra and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Gauge fields (Physics) categories.
A search for supersymmetry was performed in events with one electron or muon, jets, and missing transverse momentum. The dataset was the first 5.0 fb [superscript -1] of [Square root of s] = 7 TeV proton-proton events from the Large Hadron Collider, as measured by the CMS detector in 2011. A data-driven method was used to estimate the background at high values of the transverse mass, where the suppression of the Standard Model backgrounds allows for relatively loose cuts on the jet activity. No excess above the expected background was observed, so a limit was set in the m0- m[subscript 1/2] plane of the CMSSM at tan [Beta] = 10, A0 = 0, and sgn(mu) = +1.