Download or read book Leptoquark Searches at the Tevatron 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 recent results of searches for leptoquarks at the two Tevatron collider experiments, CDF and D[null] at Fermilab. Described here are results from direct leptoquark searches in all three generations, and indirect searches for Pati-Salam leptoquarks using rare[ital B[sub s][sup 0]] and[ital B[sub d][sup 0]] decay signatures.

Download or read book Search for Higgs Leptoquarks and Exotics at Tevatron written by Song Ming Wang and published by . This book was released on 2004 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Leptoquark Search at the Tevatron written by Raimund Strohmer and published by . This book was released on 2004 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: This article summarizes the status of the Tevatron Run II searches for leptoquarks in p{bar p} collisions at {radical}s = 1.96 TeV. The analyses discussed use datasets with integrated luminosities ranging from 72 pb{sup -1} to 200 pb{sup -1}.

Download or read book Searches for Leptoquarks at the Tevatron written by and published by . This book was released on 2008 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results for the different leptoquark searches that have been performed at the Tevatron Run II using both the CDF and the D0 detectors [1]. Emphasis will be put on the more recent searches in the jj[nu][nu] and jj[mu][nu] final states. The latest results for the other channels will be quoted for completeness.

Download or read book Search for Leptoquarks and Technicolor at the Tevatron written by and published by . This book was released on 2010 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This note summarizes results on leptoquarks and technicolor searches at the Tevatron with a more particular focus on recent ones. Results on leptoquark pair production with leptoquark decays to q[nu], qe, q[mu] and q[tau] are given for an analysed luminosity up to 5.2 fb−1. In most analyses, both leptoquarks decay identically leading to signatures of jets and missing transverse momentum or jets and charged leptons. Technicolor results are given with a particular emphasis on technirho decaying toWZ in a trilepton signature and on technirho decaying to aW and a technipion.

Download or read book Search for Pair Production of Second Generation Scalar Leptoquarks in Ppbar Collisions at the Tevatron written by and published by . This book was released on 2008 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: As predicted by numerous extensions of the Standard Model, leptoquarks (LQ) are hypothetical bosons allowing lepton-quark transitions. Under the assumption that they couple only to quarks and leptons of the same generation, three generations of leptoquarks can be distinguished. The search for the pair production of second generation scalar leptoquarks has been carried out in p{bar p} collisions at √s = 1.96TeV, using an integrated luminosity of 1 fb−1 collected by the D0 experiment at the Tevatron collider between August 2002 and February 2006. Topologies arising from the LQ{ovr LQ} → [mu]q[nu]q and LQ{ovr LQ} → [mu]q[mu]q decay modes have been investigated. In order to maximize the available statistics, a method for the combination of various prescaled triggers with an inclusive OR has been developed. Since no excess of data over the Standard Model prediction has been observed, upper limits on the leptoquark pair production cross section have been derived at 95% confidence level as function of the leptoquark mass and the branching fraction [beta] = Br(LQ → [mu]q), and are interpreted as lower limits on the leptoquark mass as function of [beta]. For [beta] = 1, [beta] = 1/2 and [beta] = 0.1, the combination of the two channels excludes scalar second generation leptoquarks with masses up to 309GeV, 262GeV, and 174GeV, respectively. The lower bounds on the scalar second generation leptoquark mass obtained for [beta] ≥ 0.1 are the best exclusion limits to date.

Download or read book Searches for Leptoquark Production and Compositeness at the Tevatron written by and published by . This book was released on 2009 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent searches for leptoquark production and compositeness in p{bar p} collisions at (square root)s = 1.96TeV are presented using data samples with integrated luminosities up to 4fb−1 recorded with the D0 and CDF detectors at the Tevatron collider.

Download or read book Direct Searches for Scalar Leptoquarks at the Run II Tevatron written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation sets new limits on the mass of the scalar leptoquark from direct searches carried out at the Run II CDF detector using data from March 2001 to October 2003. The data analyzed has a total time-integrated measured luminosity of 198 pb[sup -1] of p[bar p] collisions with [radical]s = 1.96 TeV. Leptoquarks are assumed to be pair-produced and to decay into a lepton and a quark of the same generation. They consider two possible leptoquark decays: (1) [beta] = BR(LQ [yields] [mu]q) = 1.0, and (2) [beta] = BR(LQ [yields] [mu]q) = 0.5. For the [beta] = 1 channel, they focus on the signature represented by two isolated high-p[sub T] muons and two isolated high-p[sub T] jets. For the [beta] = 1/2 channel, they focus on the signature represented by one isolated high-p[sub T] muon, large missing transverse energy, and two isolated high-p[sub T] jets. No leptoquark signal is experimentally detected for either signature. Using the next to leading order theoretical cross section for scalar leptoquark production in p[bar p] collisions [1], they set new mass limits on second generation scalar leptoquarks. They exclude the existence of second generation scalar leptoquarks with masses below 221(175) GeV/c[sup 2] for the [beta] = 1(1/2) channels.

Download or read book Search for Pair Production of Second Generation Scalar Leptoquarks in Pp Collisions at the Tevatron written by Philippe Calfayan and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Direct Searches for Scalar Leptoquarks at the Run II Tevatron written by Daniel Edward Ryan and published by . This book was released on 2004 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation sets new limits on the mass of the scalar leptoquark from direct searches carried out at the Run II CDF detector using data from March 2001 to October 2003. The data analysed has a total time-integrated measured luminosity of 198 pb-1 of pp ̄ collisions with s = 1.96 TeV. Leptoquarks are assumed to be pair-produced and to decay into a lepton and a quark of the same generation. We consider two possible leptoquark decays: (1) beta = BR(LQ → muq ) = 1.0, and (2) beta = BR(LQ → muq ) = 0.5. For the beta = 1 channel, we focus on the signature represented by two isolated high-pT muons and two isolated high-pT jets. For the beta = 1/2 channel, we focus on the signature represented by one isolated high-pT muon, large missing transverse energy, and two isolated high-p T jets. No leptoquark signal is experimentally detected for either signature. Using the next to leading order theoretical cross section for scalar leptoquark production in pp ̄ collisions [1], we set new mass limits on second generation scalar leptoquarks. We exclude the existence of second generation scalar leptoquarks with masses below 221(175) GeV/c2 for the beta = 1(1/2) channels.

Download or read book Recent Results from the Tevatron written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We review recent results from fixed-target and collider experiments at the Fermilab Tevatron. Among the topics discussed are jet production rates, [alpha][sub S] measurements, the[anti d]/[anti u] ratio in the proton sea, diffraction, heavy quark physics and leptoquark searches.

Download or read book Search for Leptoquarks at CDF written by and published by . This book was released on 1997 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the result of direct leptoquark searches based on 110 pb−1 of integrated luminosity collected by the Collider Detector at Fermilab during the 1992-93 and 1994-95 Tevatron runs at √s = 1.8 TeV. We present upper limits on the production cross sections as a function of the leptoquark mass. Using the NLO calculation of the leptoquark-pair production cross sections we extract lower-mass limits for 1{sup st}, 2{sup nd}, and 3{sup d} generation leptoquarks. We also present the result of an indirect search for Pati-Salam leptoquarks via exclusive e[mu] decay modes of B°{sub s} and B°{sub d}

Download or read book A Search for Leptoquarks in Neutrino nuclein Scattering in the CCFR Detector at the Fermilab Tevatron written by Walter Caffall Lefmann and published by . This book was released on 1995 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for First Generation Leptoquark Pair Production in the Electron Missing Energy Jets Final State written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for the pair production of first generation scalar leptoquarks (LQ) in data corresponding to an integrated luminosity of 5.4 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider in pp collisions at √s = 1.96 TeV. In the channel LQLQ → eq?eq, where q,q are u or d quarks, no significant excess of data over background is observed, and we set a 95% C.L. lower limit of 326 GeV on the leptoquark mass, assuming equal probabilities of leptoquark decays to eq and ?subesubq.

Download or read book Proceedings Of The 28th International Conference On High Energy Physics In 2 Volumes written by Zygmunt Ajduk and published by World Scientific. This book was released on 1997-04-11 with total page 1878 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 28th conference from the Rochester series was the major high energy physics conference in 1996. Volume one contains short reports on new theoretical and experimental results. Volume two consists of the review talks presented in the plenary sessions.

Download or read book Search for First Generation Leptoquarks in Proton antiproton Collisions at the Center of Mass Energy written by Shaohua Fu and published by . This book was released on 2004 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for First Generation Leptoquarks in Proton antiproton Collisions at the Center of Mass Energy written by and published by . This book was released on 2004 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: We describe a search for first generation leptoquarks decaying into the eejj final state in $p\bar{p}$ collisions at a center of mass energy of 1.96 TeV using the D0 detector at the Fermilab Tevatron. this search is based on data collected during 2002-2003 with an integrated luminosity of (130.4 =- 8.5) pb -1. Leptoquarks are assumed to be produced in pairs and to decay into an electron and a quark with a branching ration ?. We observe no evidence for leptoquarks, and set an upper cross section limit of 0.086 pb at the 95% confidence level corresponding to a lower mass limit of 231 GeV/c2 for scalar leptoquarks when ? = 1.