Search For First Generation Leptoquark Pair Production In The Electron Missing Energy Jets Final State PDF Download
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Release | : 2011 |
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Download Search for First Generation Leptoquark Pair Production in the Electron + Missing Energy + Jets Final State Book in PDF, ePub and Kindle
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.
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Total Pages | : 10 |
Release | : 2009 |
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Download Search for Pair Production of First-generation Leptoquarks in P Pbar Collisions at Sqrt(s) Book in PDF, ePub and Kindle
A search for pair production of first-generation leptoquarks (LQ) is performed with data collected by the D0 experiment in p{bar p} collisions at √s = 1.96 TeV at the Fermilab Tevatron Collider. In a sample of data corresponding to ≈ 1 fb−1 the search has been performed on the final states with two electrons and two jets or one electron, two jets and missing transverse energy. We find our data consistent with standard model expectations. The results are combined with those found in a previous analysis of events with two jets and missing transverse energy to obtain scalar LQ mass limits. We set 95% C.L. lower limits on a scalar LQ mass of 299 GeV, 284 GeV and 216 GeV for [beta] = 1, [beta] = 0.5 and [beta] = 0.02 respectively, where [beta] is the LQ branching ratio in the eq channel. This improves the results obtained with a lower luminosity sample from Run II of the Tevatron. Lower limits on vector LQ masses with different couplings from 357 GeV to 464 GeV for [beta] = 0.5 are also set using this analysis.
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Total Pages | : 162 |
Release | : 1993 |
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Download A Search for First Generation Scalar Leptoquarks at {radical}s Book in PDF, ePub and Kindle
A search for first generation scalar leptoquarks was done at the DO detector at Fermi National Accelerator Laboratory from 15 pb-1 of data taken during the 1992--1993 colder run. At Fermilab`s p{bar p} collider with a center-of-mass energy of 1.8 TeV, leptoquarks are produced mostly by the strong force in pairs. Leptoquarks carry fractional charge, color, and also lepton and baryon quantum numbers. First generation leptoquarks couple exclusively to the electron, electron neutrino, and the u and d quarks; such a leptoquark would decay into, for example, an electron plus a quark. Signatures for leptoquarks at p{bar p} colliders that have been investigated at DO are two electrons plus two jets and one electron plus missing energy (from an electron neutrino) plus two jets.
Author | : Jean Thanh Vân Trâǹ |
Publisher | : Atlantica Séguier Frontières |
Total Pages | : 548 |
Release | : 1999 |
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ISBN | : 9782863322444 |
Download '98 Electroweak Interactions and Unified Theories Book in PDF, ePub and Kindle
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Total Pages | : 29 |
Release | : 2011 |
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Download Search for First Generation Scalar Leptoquarks in the Evjj Channel in Pp Collisions at Sqrt(s) Book in PDF, ePub and Kindle
A search for pair-production of first generation scalar leptoquarks is performed in the final state containing an electron, a neutrino, and at least two jets using proton-proton collision data at sqrt(s)=7 TeV. The data were collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 36 inverse picobarns. The number of observed events is in good agreement with the predictions for standard model processes. Prior CMS results in the dielectron channel are combined with this electron+neutrino search. A 95% confidence level combined lower limit is set on the mass of a first generation scalar leptoquark at 340 GeV for beta=0.5, where beta is the branching fraction of the leptoquark to an electron and a quark. These results represent the most stringent direct limits to date for values of beta greater than 0.05.
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Total Pages | : 162 |
Release | : 1993 |
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Download A Search for First Generation Scalar Leptoquarks at (square Root)s Book in PDF, ePub and Kindle
A search for first generation scalar leptoquarks was done at the DO detector at Fermi National Accelerator Laboratory from 15 pb-1 of data taken during the 1992--1993 colder run. At Fermilab's p{bar p} collider with a center-of-mass energy of 1.8 TeV, leptoquarks are produced mostly by the strong force in pairs. Leptoquarks carry fractional charge, color, and also lepton and baryon quantum numbers. First generation leptoquarks couple exclusively to the electron, electron neutrino, and the u and d quarks; such a leptoquark would decay into, for example, an electron plus a quark. Signatures for leptoquarks at p{bar p} colliders that have been investigated at DO are two electrons plus two jets and one electron plus missing energy (from an electron neutrino) plus two jets.
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Total Pages | : 48 |
Release | : 2015 |
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Download Search for Pair Production of First and Second Generation Leptoquarks in Proton-proton Collisions at $\sqrt{s} Book in PDF, ePub and Kindle
Our search for pair production of first and second generation leptoquarks is performed in final states containing either two charged leptons and two jets, or one charged lepton, one neutrino and two jets, using proton-proton collision data at √s = 8 TeV. The data, corresponding to an integrated luminosity of 19.7 fb-1, were recorded with the CMS detector at the LHC. First-generation scalar leptoquarks with masses less than 1010 (850) GeV are excluded for [beta] = 1.0 (0.5), where b is the branching fraction of a leptoquark decaying to a charged lepton and a quark. Similarly, secondgeneration scalar leptoquarks with masses less than 1080 (760) GeV are excluded for [beta] = 1.0 (0.5). Furthermore, mass limits are also set for vector leptoquark production scenarios with anomalous vector couplings, and for R-parity violating supersymmetric scenarios of top squark pair production resulting in similar final-state signatures. These are the most stringent limits placed on the masses of leptoquarks and RPV top squarks to date.
Author | : Daniel Lellouch |
Publisher | : Springer Science & Business Media |
Total Pages | : 1293 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 3642599826 |
Download International Europhysics Conference on High Energy Physics Book in PDF, ePub and Kindle
The 1997 International Europhysics Conference on High Energy Physics was held at the campus of the Hebrew University of Jerusalem and at the Jerusalem Renaissance Hotel, from August 19th to August 25th, 1997. This was the first time that the European Physical Society had its High Energy Physics Conference outside the boundary of Europe. A total of 550 physicists participated in the conference with a total of 250 presentations in the parallel sessions and 26 presentations in the plenary sessions. The Board of the of the High Energy and Particle Physics division (HEPP) of the EPS acted as the Scientific Organizing Committee. The Board acknowl edges the help of the International Advisory Committee as well as that of the Local Organizing Committee. The conference was co-organized by the Hebrew University of Jerusalem and by the Weizmann Institute of Science, with important help by physi cists from the Israeli Institute of Technology (Technion) and the Tel Aviv University.
Author | : Dmitri Tsybychev |
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Total Pages | : 358 |
Release | : 2004 |
Genre | : Proton-antiproton colliders |
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Download Search for First-generation Leptoquarks in the Jets and Missing Transverse Energy Topology in Proton-antiproton Collisions at Center-of-mass Energy 1.96 TeV Book in PDF, ePub and Kindle
Author | : J. Thanh Van Tran |
Publisher | : Atlantica Séguier Frontières |
Total Pages | : 662 |
Release | : 1994 |
Genre | : Electromagnetic interactions |
ISBN | : 9782863321621 |
Download '94 Electroweak Interactions and Unified Theories Book in PDF, ePub and Kindle