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Book Search for R parity Violating Supersymmetry with the D0 Detector

Download or read book Search for R parity Violating Supersymmetry with the D0 Detector written by Christian Autermann and published by . This book was released on 2006 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Searches for R-parity violating supersymmetry with the D0 detector at the Fermilab Tevatron p{bar p}-collider are presented. In the case of non-zero LL{bar E} couplings {lambda}{sub ijk} {approx}> 0.01, multi-lepton final states, and for a small coupling {lambda}{sub 122} “0.01 di-muon final states are studied. The case of non-zero LQ{bar D} coupling {lambda}{prime}{sub 211} leads to final states with two muons and jets. A total integrated luminosity of 0.38 fb{sup -1} collected between April 2002 and August 2004 is utilized. The observed numbers of events are in agreement with the Standard Model expectation, and limits on R{sub p} supersymmetry are derived, extending significantly previous bounds.

Book Search for R parity Violating Supersymmetry Via the LL Anti E Couplings Lambda 121 Lambda 122 Or Lambda 133 in P Anti p Collisions at S

Download or read book Search for R parity Violating Supersymmetry Via the LL Anti E Couplings Lambda 121 Lambda 122 Or Lambda 133 in P Anti p Collisions at S written by and published by . This book was released on 2006 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for gaugino pair production with a trilepton signature in the framework of R-parity violating supersymmetry via the couplings ?121, ?122, or ?133 is presented. The data, corresponding to an integrated luminosity of L ≈ 360 pb−1, were collected from April 2002 to August 2004 with the D0 detector at the Fermilab Tevatron Collider, at a center-of-mass energy of √s = 1.96 TeV. This analysis considers final states with three charged leptons with the flavor combinations eel, ??l, and ee? (l = e or ?). No evidence for supersymmetry is found and limits at the 95% confidence level are set on the gaugino pair production cross section and lower bounds on the masses of the lightest neutralino and chargino are derived in two supersymmetric models.

Book Search for R parity Violating Supersymmetry with the ATLAS Detector

Download or read book Search for R parity Violating Supersymmetry with the ATLAS Detector written by and published by . This book was released on 2014 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Search for R parity Violating Supersymmetry in Multilepton Final States Using the ATLAS Detector

Download or read book Search for R parity Violating Supersymmetry in Multilepton Final States Using the ATLAS Detector written by Matthew Henry Klein and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a search for R-parity violating supersymmetry at sqrt(s)=13 TeV, using approximately 13.3 fb-1 of data collected by ATLAS in 2015 and the first half of 2016. Events are required to contain at least four leptons (electrons or muons only) that are not the product of a Z boson decay, and this requirement results in a low Standard Model background and a high sensitivity to various physics models beyond the Standard Model. No significant deviations from the Standard Model are observed in data, and results are used to set upper limits on the event yields from processes beyond the Standard Model. In a simplified model of chargino production with indirect R-parity violating decays, limits are extended by approximately 400 GeV relative to the Run 1 search, excluding chargino masses below 1.1 TeV.

Book Search for R parity Violating Supersymmetry in Multi lepton Final States with the ATLAS Detector

Download or read book Search for R parity Violating Supersymmetry in Multi lepton Final States with the ATLAS Detector written by Robert Michael Zimmermann and published by . This book was released on 2014 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Studies of R parity Violating Supersymmetry with the ATLAS Detector

Download or read book Studies of R parity Violating Supersymmetry with the ATLAS Detector written by Alan Wyn Phillips and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Leptoquarks and R parity Violating Supersymmetry Search at CDF

Download or read book Leptoquarks and R parity Violating Supersymmetry Search at CDF written by and published by . This book was released on 1997 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results from direct searches for leptoquarks and R-parity violating SUSY particles by the CDF experiment. These results strongly constrain the interpretation of the recently reported high Q2 event excess at HERA as leptoquark or R-parity violating SUSY production.

Book Search for R parity Violating Supersymmetry in the Multilepton Final State

Download or read book Search for R parity Violating Supersymmetry in the Multilepton Final State written by Alon Jacques Attal and published by . This book was released on 2006 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a search for physics beyond the standard model of elementary particles in events containing three or more charged leptons in the final state. The search is based on an R-parity violating supersymmetric model that assumes supersymmetric particles are pair produced at hadron colliders and the R-parity violating coupling is small enough so that these particles "cascade" decay into the lightest supersymmetric particle. The lightest supersymmetric particle may only decay into two charged leptons (electrons or muons) plus a neutrino through a lepton number violating interaction. Proton-antiproton collision events produced with s = 1.96 TeV are collected between March 2002 and August 2004 with an integrated luminosity of 346 pb-1. R-parity violating supersymmetry is sought for in two data samples, one with exactly three leptons and one with four or more leptons. The trilepton sample has a modest background primarily from Drell-Yan events where an additional lepton is a result of photon conversions or jet misidentification while the four or more lepton sample has an extremely low background. In the three lepton samples 6 events are observed while in the four or more lepton sample zero events are observed. These results are consistent with the standard model expectation and are interpreted as mass limits on the lightest neutralino ( c&d5;01 ) and lightest chargino ( c&d5;+/- 1 ) particles. The c&d5;01 mass is constrained to be heavier than 97.7 to 110.4 GeV/ c2, while the c&d5;+/- 1 mass is constrained to be heavier than 185.3 to 202.7 GeV/ c2, depending on the supersymmetry scenario.

Book Search for R Parity Violating Supersymmetry Using Like sign Dielectrons at CDF

Download or read book Search for R Parity Violating Supersymmetry Using Like sign Dielectrons at CDF written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results of a search for like-sign dielectron plus multijet events using 107 pb[sup -1] of data at[radical]s= 1.8 TeV collected by the CDF experiment. Finding no events that pass our selection criteria, we set 95% confidence level upper limits on gluino-gluino ([tilde g][tilde g]) and squark-squark ([tilde q]-[anti[tilde q]]) production with R parity violating decays of the charm squark ([tilde c][sub L]) in[tilde g][yields] c[tilde c][sub L] and of the lightest neutralino ([tilde[xi]][sup 0][sub 1]) in[tilde q][yields] q[tilde[xi]][sup 0][sub 1] via a non-zero[lambda]'[sub 121] coupling. We compare our results to NLO calculations of gluino and squark production cross sections and set lower limits on the masses M([tilde g]), M([tilde t][sub 1]), and M([tilde q]).

Book Search for R parity Violating Supersymmetry with Displaced Vertices in Proton proton Collisions at Sqrt s

Download or read book Search for R parity Violating Supersymmetry with Displaced Vertices in Proton proton Collisions at Sqrt s written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are reported from a search for R-parity violating supersymmetry in proton-proton collision events collected by the CMS experiment at a center-of-mass energy of sqrt(s)=8 TeV. The data sample corresponds to an integrated luminosity of 17.6 inverse femtobarns. This search assumes a minimal flavor violating model in which the lightest supersymmetric particle is a long-lived neutralino or gluino, leading to a signal with jets emanating from displaced vertices. In a sample of events with two displaced vertices, no excess yield above the expectation from standard model processes is observed, and limits are placed on the pair production cross section as a function of mass and lifetime of the neutralino or gluino. At 95% confidence level, the analysis excludes cross sections above approximately 1 fb for neutralinos or gluinos with mass between 400 and 1500 GeV and mean proper decay length between 1 and 30 mm. Assuming gluino pair production cross sections, gluino masses are excluded below 1 and 1.3 TeV for mean proper decay lengths of 300 micrometers and 1 mm, respectively, and below 1.4 TeV for the range 2-30 mm. The results are also applicable to other models in which long-lived particles decay into multijet final states.