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 Search for Higgs Leptoquarks and Exotics at Tevatron written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reviews some of the most recent results from the CDF and D0 experiments on the searches for Standard Model and Non-Standard Model Higgs bosons, and other new phenomena at the Tevatron. Both experiments examine data from proton anti-proton collision at (square root)s = 1.96 TeV, of integrated luminosity (almost equal to) 200 pb−1 (per experiment), to search for Higgs predicted in the Standard Model and beyond Standard Model, supersymmetric particles in the Gauge Mediated Symmetry Breaking scenario, leptoquarks, and excited electrons. No signal was observed, and limits on the signatures and models are derived.
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 A Search for Exotic Higgs Decays written by Jackson Burzynski and published by Springer Nature. This book was released on 2023-05-23 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: The absence of new physics at the TeV scale observed thus far at the Large Hadron Collider (LHC) motivates an increasing focus on searches for weakly-coupled new particles and exotic signatures. In particular, particles with macroscopic mean proper lifetimes, known as long-lived particles (LLPs), are of significant interest due to their ability to elude the majority of searches which rely on the assumption that Beyond Standard Model particles decay close to the primary interaction point. Many models which aim to solve various issues with the Standard Model (SM) introduce new particles with lifetimes that are either unconstrained, or even shown to prefer the macroscopic regime. These theories often point to the Higgs boson as a possible portal to new physics, with exotic Higgs decays being the primary phenomenological consequence and means of discovery. It is well motivated both from theory and experimental constraints to consider the scenario in which the particles produced in these exotic decays have macroscopic proper lifetimes and give rise to unique detector signatures. This work describes a search for exotic decays of the Higgs boson to two long-lived, neutral, spin-0 particles which subsequently decay to pairs of b quarks, giving the striking signature of displaced hadronic jets in the ATLAS inner detector. Several other ATLAS searches have probed this decay topology previously, excluding branching ratios of the Higgs boson to LLPs of more than 10% for proper lifetimes greater than 100mm. These searches relied on dedicated triggers designed to select events with LLPs decaying in the ATLAS calorimeter or muon spectrometer. The lack of an equivalent trigger for LLP decays in the ATLAS inner detector has been a limiting factor in probing LLP lifetimes less than 100mm. To circumvent the difficulty of triggering on LLP decays, the search presented in this thesis exploits the ZH associated production mode, relying on leptonic trigger signatures to select interesting events. This is the first search for Higgs boson decays into LLPs to exploit this analysis methodology and additionally makes use of several novel methods for both background rejection and background estimation. No excess over Standard Model predictions is observed, and upper limits are set on the branching ratio of the Higgs boson to LLPs . Depending on the mass of the LLP, branching ratios greater than 10% are excluded for lifetimes as small as 4mm and as large as 100mm, probing an important gap in the ATLAS exotic Higgs decay programme. In comparison to the previous searches for Higgs decays to LLPs, these are among the most stringent limits placed on this scenario, and for LLPs with masses below 40 GeV these results represent the strongest existing constraints on the branching ratio of the Higgs boson to LLPs in this lifetime regime.
Download or read book Exotic Physics Search for First generation Scalar Leptoquarks in Ppbar Collisions at Sqrt written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Search for Doubly charged Higgs Bosons at the Tevatron written by Sasha Baroiant and published by . This book was released on 2006 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Searches for Higgs at Tevatron written by and published by . This book was released on 2009 with total page 7 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 High Energy Physics 99 Proceedings of the International Europhysics Conference on High Energy Physics Tampere Finland 15 21 July 1999 written by K Huitu and published by CRC Press. This book was released on 2000-01-01 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Energy Physics 99 contains the 18 invited plenary presentations and 250 contributions to parallel sessions presented at the International Europhysics Conference on High Energy Physics. The book provides a comprehensive survey of the latest developments in high energy physics. Topics discussed include hard high energy, structure functions, soft interactions, heavy flavor, the standard model, hadron spectroscopy, neutrino masses, particle astrophysics, field theory, and detector development.
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 A Search for Double charged Higgs Bosons at the Tevatron written by Sasha Baraoiant and published by . This book was released on 2006 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: We search for the pair production of doubly charged Higgs particles followed by the lepton-flavor violating decay of each Higgs into electron-and-tau and muon-and-tau pairs using 350 pb{sup -1} of data collected by the CDF II experiment at the Fermilab Tevatron. Separate searches investigate cases where three or four final state leptons are detected, and the limits for each exclusive decay mode reflect the combined results of both searches. Assuming the H{sup {+-}{+-}}{sub L} decays exclusively into like sign electron-and-tau pairs, we set a lower limit on its mass of 114 GeV/c2 at the 95 % confidence level. In the case of exclusive muon-and-tau decays, we set a lower mass limit of 112 GeV/c2 also at the 95% confidence level.
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 Higgs Searches at the Tevatron written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the highest priority physics goals for the upgraded Tevatron experiments, CDF and D0, is the search for the Higgs boson. We present the initial results from both experiments, based on 40-90 pb−1 integrated luminosity, of Higgs searches in several final states, including WH and ZH, H --> WW, and doubly-charged Higgs.
Download or read book Beyond the Desert 1999 written by I. V. Krivosheina and published by Taylor & Francis. This book was released on 2000-12-01 with total page 1236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addressing the need for an up-to-date reference on silicon devices and heterostructures, Beyond the Desert 99 reviews the technology used to grow and characterize Goup IV alloy films. It covers the theory, device design, and simulation of heterojunction transistors, emphasizing their relevance in developing the technologies involving strained layers; device design and simulation of conventional silicon bipolar transistors and SiGe HBTs at room and low temperatures; and device design and simulation for MOSFETs, including SiGe and strained-Si channel MOSFETs. The book concludes with simulations and examples of different applications. It provides a unified reference for scientists and engineers investigating the use of SiGe and strained silicon in a new generation of high-speed circuit applications.
Download or read book Exotic Physics written by D. Acosta and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for the pair production of scalar leptoquarks, LQ, using 191 pb{sup -1} of proton-antiproton collision data recorded by the CDF experiment during Run II of the Tevatron. The leptoquarks are sought via their decay into a neutrino and quark yielding missing transverse energy and several jets of large transverse energy. No evidence for leptoquark production is observed, and limits are set on {sigma}(p{bar p} {yields} LQ{ovr OQ}X {yields} v{bar v}q{bar q}X). Using a next-to-leading order theoretical prediction of the cross section for scalar leptoquark production, we exclude first-generation leptoquarks in the mass interval 78 to 117 GeV/c{sup 2} at the 95% confidence level for BR(LQ {yields} vq) = 100%.
Download or read book Lepton And Photon Interactions At High Energies Proceedings Of The Xix International Symposium written by John Jaros and published by World Scientific. This book was released on 2000-07-21 with total page 941 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stanford University hosted the XIX International Symposium on Lepton and Photon Interactions at High Energies on August 9 - 14, 1999, at the Law School on the Stanford University Campus, the site of the previous Symposia. This volume constitutes the proceedings of the Symposium.
