Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download A High Statistics Search For Narrow Resonances In The Dimuon Spectrum From 800 Gev C Proton Nucleus Collisions full books in PDF, epub, and Kindle. Read online A High Statistics Search For Narrow Resonances In The Dimuon Spectrum From 800 Gev C Proton Nucleus Collisions ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author :
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (16 download)
Download or read book A High Statistics Search for Narrow Resonances in the Dimuon Spectrum from 800 GeV/c Proton-Nucleus Collisions written by and published by . This book was released on 1989 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Drasko Jovanovic
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (44 download)
Download or read book Publications from Fermilab Experiments written by Drasko Jovanovic and published by . This book was released on 1987 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Narrow Resonances in Dilepton Mass Spectra 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: A search for narrow resonances in dielectron and dimuon invariant mass spectra has been performed using data obtained from proton-proton collisions at $ \sqrt{s} = $ 13 TeV collected with the CMS detector. The integrated luminosity for the dielectron sample is 2.7 fb$^{-1}$ and for the dimuon sample 2.9 fb$^{-1}$. The sensitivity of the search is increased by combining these data with a previously analysed set of data obtained at $ \sqrt{s} = $ 8 TeV and corresponding to a luminosity of 20 fb$^{-1}$. No evidence for non-standard-model physics is found, either in the 13 TeV data set alone, or in the combined data set. Upper limits on the product of production cross section and branching fraction have also been calculated in a model-independent manner to enable interpretation in models predicting a narrow dielectron or dimuon resonance structure. Limits are set on the masses of hypothetical particles that could appear in new-physics scenarios. For the $\mathrm{Z}'_{\text{SSM}}$ particle, which arises in the sequential standard model, and for the superstring inspired $\mathrm{Z}'_{\psi}$ particle, 95% confidence level lower mass limits for the combined data sets and combined channels are found to be 3.37 and 2.82 TeV, respectively. The corresponding limits for Kaluza-Klein gravitons arising in the Randall-Sundrum model of extra dimensions with coupling parameters 0.01 and 0.10 are 1.46 and 3.11 TeV, respectively. These results significantly extend previous limits.
Author : Christian Schnaible
Publisher :
ISBN 13 :
Total Pages : 219 pages
Book Rating : 4.:/5 (111 download)
Download or read book Search for High-mass Dimuon Resonances and Study of Endcap Muon System Neutron-induced Background Hits with the Compact Muon Solenoid Detector written by Christian Schnaible and published by . This book was released on 2019 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a search for narrow resonances in the dimuon invariant mass spectrum using data obtained from proton-proton collisions at $\sqrt{s}=13$ TeV collected by the CMS detector at the CERN LHC. We describe the analysis and results of the data collected in 2018, which corresponds to an integrated luminosity of 63.1 fb$^{-1}$. We also present results of the combination of the 2016, 2017, and 2018 data sets, as well as the results of the combination with the dielectron analysis, which correspond to a total integrated luminosity of up to 140 fb$^{-1}$. The results are interpreted in terms of the upper limit on the ratio of the cross section of a new resonance to that of the $Z$ boson. We also compute the corresponding lower limits on the masses of various benchmark resonances. No evidence for beyond the standard model physics is observed in the 2018 data set, or in any of the combined data sets. Relevant for the high masses where we perform our search, we also discuss the reconstruction and performance of high momentum muons in CMS. In the appendix, we present a study of neutron-induced background hits in CMS endcap muon chambers.
Download or read book Search for Narrow Resonances in Dijet Final States 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: A search for narrow resonances decaying into dijet final states is performed on data from proton-proton collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 18.8 fb-1. The data were collected with the CMS detector using a novel technique called data scouting, in which the information associated with these selected events is much reduced, permitting collection of larger data samples. This technique enables CMS to record events containing jets at a rate of 1 kHz, by collecting the data from the high-level-trigger system. In this way, the sensitivity to low-mass resonances is increased significantly, allowing previously inaccessible couplings of new resonances to quarks and gluons to be probed. The resulting dijet mass distribution yields no evidence of narrow resonances. Upper limits are presented on the resonance cross sections as a function of mass, and compared with a variety of models predicting narrow resonances. Furthermore, the limits are translated into upper limits on the coupling of a leptophobic resonance Z'B to quarks, improving on the results obtained by previous experiments for the mass range from 500 to 800 GeV.
Author : Lydia Audrey Beresford
Publisher : Springer
ISBN 13 : 331997520X
Total Pages : 175 pages
Book Rating : 4.3/5 (199 download)
Download or read book Searches for Dijet Resonances written by Lydia Audrey Beresford and published by Springer. This book was released on 2018-09-04 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses one of the most intriguing mysteries of our universe: the nature of dark matter. The results presented here mark a significant and substantial contribution to the search for new physics, in particular for new particles that couple to dark matter. The first analysis presented is a search for heavy new particles that decay into pairs of hadronic jets (dijets). This pioneering analysis explores unprecedented dijet invariant masses, reaching nearly 7 TeV, and sets constraints on several important new physics models. The two subsequent analyses focus on the difficult low dijet mass region, down to 200 GeV, and employ a novel technique to efficiently gather low-mass dijet events. The results of these analyses transcend the long-standing constraints on dark matter mediator particles set by several existing experiments.
Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (94 download)
Download or read book Observation of a Dimuon Resonance at 9.5 GeV in 400-GeV Proton-Nucleus Collisions written by and published by . This book was released on 1977 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dimuon production is studied in 400-GeV proton-nucleus collisions. A strong enhancement is observed at 9.5 GeV mass in a sample of 9000 dimuon events with a mass m[mu]+[mu]->5 GeV.
Author :
Publisher :
ISBN 13 :
Total Pages : 818 pages
Book Rating : 4.0/5 ( download)
Download or read book High Energy Physics Index written by and published by . This book was released on 1990 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 215 pages
Book Rating : 4.:/5 (965 download)
Download or read book Measurement of Continuum Dimuon Production in 800-GeV/C Proton Nucleon Collisions written by and published by . This book was released on 2003 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fermilab Experiment 866 has performed an absolute measurement of continuum dimuon (Drell-Yan) cross sections in 800-GeV/c pp and pd interactions. Results differential in the mass, Feynman-x (xF) and transverse momenta (pT) of the dimuon pairs are reported. These results represent the most extensive study of the Drell-Yan process to date, based on a data sample of 175,000 dimuon events covering the widest range in kinematics yet achieved (4.2d"M d"16.85 GeV and -0.05 d"xF d"0.8) with this level of precision. The cross sections are primarily sensitive to the magnitude and shape of the light antiquark distributions ($\bar{d}$(x) and $\bar{u}$(x)) in the nucleon, but also provide important information on the valence quarks as well as the gluons. They are in good agreement with other existing proton-induced Drell-Yan experiments. There is also general agreement between the data and next-to-leading-order calculations based on various sets of parton distribution functions. Differences between data and theory are examined, and the potential impact of these data on future parameterizations of the parton distributions are be discussed.
Author : Richard Gray
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (22 download)
Download or read book Dimuon Production in 800 GeV/c Proton-nucleon Collisions written by Richard Gray and published by . This book was released on 1988 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jason C. Webb
Publisher :
ISBN 13 :
Total Pages : 430 pages
Book Rating : 4.:/5 (519 download)
Download or read book Measurement of Continuum Dimuon Production in 800-GEV/C Proton-nucleon Collisions written by Jason C. Webb and published by . This book was released on 2002 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter Bruce Straub
Publisher :
ISBN 13 :
Total Pages : 412 pages
Book Rating : 4.:/5 (242 download)
Download or read book Production of High-pt̲ Hadrons and High-mass Hadron Pairs in 800 GeV/c Proton-nucleus Collisions written by Peter Bruce Straub and published by . This book was released on 1990 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for a Narrow Resonance Lighter Than 200 GeV Decaying to a Pair of Muons in Proton-proton Collisions at √s written by and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Resonant Production of High-mass Photon Pairs 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: A search for the resonant production of high-mass photon pairs is presented. The analysis is based on samples of proton-proton collision data collected by the CMS experiment at center-of-mass energies of 8 and 13 TeV, corresponding to integrated luminosities of 19.7 and 3.3 inverse femtobarns, respectively. The search focuses on spin-0 and spin-2 resonances with masses between 0.5 and 4 TeV and with widths, relative to the mass, between 1.4E-4 and 5.6E-2. Limits are set on scalar resonances produced through gluon-gluon fusion, and on Randall--Sundrum gravitons. A modest excess of events compatible with a narrow resonance with a mass of about 750 GeV is observed. The local significance of the excess is approximately 3.4 standard deviations. The significance is reduced to 1.6 standard deviations once the effect of searching under multiple signal hypotheses is considered. More data are required to determine the origin of this excess.
Download or read book Search for Narrow Resonances Decaying to Dijets in Proton-proton Collisions at {u221A}s written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a search for narrow resonances in proton-proton collisions at √s = 13 TeV is presented. The invariant mass distribution of the two leading jets is measured with the CMS detector using a data set corresponding to an integrated luminosity of 2.4 fb–1. The highest observed dijet mass is 6.1 TeV. The distribution is smooth and no evidence for resonant particles is observed. Upper limits at 95% confidence level are set on the production cross section for narrow resonances with masses above 1.5 TeV. When interpreted in the context of specific models, the limits exclude string resonances with masses below 7.0 TeV, scalar diquarks below 6.0 TeV, axigluons and colorons below 5.1 TeV, excited quarks below 5.0 TeV, color-octet scalars below 3.1 TeV, and W' bosons below 2.6 TeV. These results significantly extend previously published limits.
Author :
Publisher :
ISBN 13 :
Total Pages : 1520 pages
Book Rating : 4.3/5 (129 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1979 with total page 1520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Dijet Resonances 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: A search is presented for narrow resonances decaying to dijet final states in proton-proton collisions at sqrt(s)=13 TeV using data corresponding to an integrated luminosity of 12.9 inverse femtobarns. The dijet mass spectrum is well described by a smooth parameterization and no significant evidence for the production of new particles is observed. Upper limits at 95% confidence level are reported on the production cross section for narrow resonances with masses above 0.6 TeV. In the context of specific models, the limits exclude string resonances with masses below 7.4 TeV, scalar diquarks below 6.9 TeV, axigluons and colorons below 5.5 TeV, excited quarks below 5.4 TeV, color-octet ascalars below 3.0 TeV, W' bosons below 2.7 TeV, Z' bosons below 2.1 TeV and between 2.3 and 2.6 TeV, and RS gravitons below 1.9 TeV. These extend previous limits in the dijet channel. Vector and axial-vector mediators in a simplified model of interactions between quarks and dark matter are excluded below 2.0 TeV. The first limits in the dijet channel on dark matter mediators are presented as functions of dark matter mass and are compared to the exclusions of dark matter in direct detection experiments.
