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Full-Text Articles in Physical Sciences and Mathematics

Searches For Supersymmetry Using The M T2 Variable In Hadronic Events Produced In Pp Collisions At 8 Tev, Cms Collaboration, V. Khachatryan, A. M. Sirunyan, Marc M. Baarmand, Marcus Hohlmann, Himali Kalakhety, Francisco X. Yumiceva May 2015

Searches For Supersymmetry Using The M T2 Variable In Hadronic Events Produced In Pp Collisions At 8 Tev, Cms Collaboration, V. Khachatryan, A. M. Sirunyan, Marc M. Baarmand, Marcus Hohlmann, Himali Kalakhety, Francisco X. Yumiceva

Aerospace, Physics, and Space Science Faculty Publications

Searches for supersymmetry (SUSY) are performed using a sample of hadronic events produced in 8 TeV pp collisions at the CERN LHC. The searches are based on the M T2 variable, which is a measure of the transverse momentum imbalance in an event. The data were collected with the CMS detector and correspond to an integrated luminosity of 19.5 fb−1. Two related searches are performed. The first is an inclusive search based on signal regions defined by the value of the M T2 variable, the hadronic energy in the event, the jet multiplicity, and the number of jets …


An Extended Detailed Investigation Of First And Second Order Supersymmetries For Off-Shell N=2 And N=4 Supermultiplets, Sylvester James Gates, Jr., James Parker, Vincent G. J. Rodgers, Leo Rodriguez, Kory Stiffler Jan 2015

An Extended Detailed Investigation Of First And Second Order Supersymmetries For Off-Shell N=2 And N=4 Supermultiplets, Sylvester James Gates, Jr., James Parker, Vincent G. J. Rodgers, Leo Rodriguez, Kory Stiffler

Biological and Physical Sciences Department Faculty Works

This paper investigates the d = 4, N = 4 Abelian, global Super-Yang Mills system (SUSY-YM). It is shown how the N = 2 Fayet Hypermultiplet (FH) and N = 2 vector multiplet (VM) are embedded within. The central charges and internal symmetries provide a plethora of information as to further symmetries of the Lagrangian. Several of these symmetries are calculated to second order. It is hoped that investigations such as these may yield avenues to help solve the auxiliary field closure problem for d = 4, N = 4, SUSY-YM and the d = 4, N = 2 Fayet-Hypermultiplet, …


Search For Physics Beyond The Standard Model In Events With Two Leptons, Jets, And Missing Transverse Momentum In Pp Collisions At √S= 8 Tev, Vardan Khachatryan, Marc M. Baarmand, Marcus Hohlmann, Himali Kalakhety, Francisco Yumiceva, The Cms Collaboration Jan 2015

Search For Physics Beyond The Standard Model In Events With Two Leptons, Jets, And Missing Transverse Momentum In Pp Collisions At √S= 8 Tev, Vardan Khachatryan, Marc M. Baarmand, Marcus Hohlmann, Himali Kalakhety, Francisco Yumiceva, The Cms Collaboration

Aerospace, Physics, and Space Science Faculty Publications

A search is presented for physics beyond the standard model in final states with two opposite-sign same-flavor leptons, jets, and missing transverse momentum. The data sample corresponds to an integrated luminosity of 19.4 fb−1 of proton-proton collisions at √S= 8 TeV collected with the CMS detector at the CERN LHC in 2012. The analysis focuses on searches for a kinematic edge in the invariant mass distribution of the oppositesign same-flavor lepton pair and for final states with an on-shell Z boson. The observations are consistent with expectations from standard model processes and are interpreted in terms of upper limits on …


Searches For Third-Generation Squark Production In Fully Hadronic Final States In Proton-Proton Collisions At √S = 8 Tev, Vardan Khachatryan, Vallary Bhopatkar, Marcus Hohlmann, H Kalakhety, D. Mareskas-Palcek, Tuhin S. Roy, Francisco X. Yumiceva, The Cms Collaboration Jan 2015

Searches For Third-Generation Squark Production In Fully Hadronic Final States In Proton-Proton Collisions At √S = 8 Tev, Vardan Khachatryan, Vallary Bhopatkar, Marcus Hohlmann, H Kalakhety, D. Mareskas-Palcek, Tuhin S. Roy, Francisco X. Yumiceva, The Cms Collaboration

Aerospace, Physics, and Space Science Faculty Publications

Searches for third-generation squarks in fully hadronic final states are presented using data samples corresponding to integrated luminosities of 19.4 or 19.7 fb−1, collected at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC. Three mutually exclusive searches are presented, each optimized for a different decay topology. They include a multijet search requiring one fully reconstructed top quark, a dijet search requiring one or two jets originating from b quarks, and a monojet search. No excesses above the standard model expectations are seen, and limits are set on top and bottom squark production in the context …


Search For Disappearing Tracks In Proton-Proton Collisions At S√=8 Tev, The Cms Collaboration, V. Khachatryan, A. M. Sirunyan, Marc M. Baarmand, Marcus Hohlmann, Himali Kalakhety, Francisco Yumiceva Jan 2015

Search For Disappearing Tracks In Proton-Proton Collisions At S√=8 Tev, The Cms Collaboration, V. Khachatryan, A. M. Sirunyan, Marc M. Baarmand, Marcus Hohlmann, Himali Kalakhety, Francisco Yumiceva

Aerospace, Physics, and Space Science Faculty Publications

A search is presented for long-lived charged particles that decay within the CMS detector and produce the signature of a disappearing track. Disappearing tracks are identified as those with little or no associated calorimeter energy deposits and with missing hits in the outer layers of the tracker. The search uses proton-proton collision data recorded at s√=8 TeV that corresponds to an integrated luminosity of 19.5 fb−1. The results of the search are interpreted in the context of the anomaly-mediated supersymmetry breaking (AMSB) model. The number of observed events is in agreement with the background expectation, and limits are set on …


Search For A Light Charged Higgs Boson Decaying To Cs In Pp Collisions At P S = 8 Tev, The Cms Collaboration, V. Khachatryan, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Marcus Hohlmann, Himali Kalakhety, Daniel Noonan, Tuhin Roy, Francisco Yumiceva Jan 2015

Search For A Light Charged Higgs Boson Decaying To Cs In Pp Collisions At P S = 8 Tev, The Cms Collaboration, V. Khachatryan, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Marcus Hohlmann, Himali Kalakhety, Daniel Noonan, Tuhin Roy, Francisco Yumiceva

Aerospace, Physics, and Space Science Faculty Publications

A measurement of the W boson helicity is presented, where the W boson originates from the decay of a top quark produced in pp collisions. The event selection, optimized for reconstructing a single top quark in the final state, requires exactly one isolated lepton (muon or electron) and exactly two jets, one of which is likely to originate from the hadronization of a bottom quark. The analysis is performed using data recorded at a center-of-mass energy of 8 TeV with the CMS detector at the CERN LHC in 2012. The data sample corresponds to an integrated luminosity of 19.7 fb …