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Search For New Phenomena In Dijet Mass And Angular Distributions From Pp Collisions At Sqrts
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Book Synopsis Search for New Phenomena in Dijet Mass and Angular Distributions from $pp$ Collisions at $\sqrt{s}$ by :
Download or read book Search for New Phenomena in Dijet Mass and Angular Distributions from $pp$ Collisions at $\sqrt{s}$ written by and published by . This book was released on 2016 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Letter describes a model-agnostic search for pairs of jets (dijets) produced by resonant and non-resonant phenomena beyond the Standard Model in 3.6 fb-1 of proton–proton collisions with a centre-of-mass energy of √s = 13 TeV recorded by the ATLAS detector at the Large Hadron Collider. The distribution of the invariant mass of the two leading jets is examined for local excesses above a data-derived estimate of the smoothly falling prediction of the Standard Model. The data are also compared to a Monte Carlo simulation of Standard Model angular distributions derived from the rapidity of the two jets. No evidence of anomalous phenomena is observed in the data, which are used to exclude, at 95% CL, quantum black holes with threshold masses below 8.3 TeV, 8.1 TeV, or 5.1 TeV5.1 TeV in three different benchmark scenarios; resonance masses below 5.2 TeV for excited quarks, 2.6 TeV in a W' model, a range of masses starting from mZ' = 1.5 TeV and couplings from gq = 0.2 in a Z' model; and contact interactions with a compositeness scale below 12.0 TeV and 17.5 TeV respectively for destructive and constructive interference between the new interaction and QCD processes. These results significantly extend the ATLAS limits obtained from 8 TeV data. As a result, gaussian-shaped contributions to the mass distribution are also excluded if the effective cross-section exceeds values ranging from approximately 50–300 fb for masses below 2 TeV to 2–20 fb for masses above 4 TeV.
Book Synopsis Search for New Phenomena in Dijet Mass and Angular Distributions from Pp Collisions at [mml by :
Download or read book Search for New Phenomena in Dijet Mass and Angular Distributions from Pp Collisions at [mml written by and published by . This book was released on 2016 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Letter describes a model-agnostic search for pairs of jets (dijets) produced by resonant and non-resonant phenomena beyond the Standard Model in 3.6 fb-1 of proton-proton collisions with a centre-of-mass energy of √s = 13 TeV recorded by the ATLAS detector at the Large Hadron Collider. The distribution of the invariant mass of the two leading jets is examined for local excesses above a data-derived estimate of the smoothly falling prediction of the Standard Model. The data are also compared to a Monte Carlo simulation of Standard Model angular distributions derived from the rapidity of the two jets. No evidence of anomalous phenomena is observed in the data, which are used to exclude, at 95% CL, quantum black holes with threshold masses below 8.3 TeV, 8.1 TeV, or 5.1 TeV5.1 TeV in three different benchmark scenarios; resonance masses below 5.2 TeV for excited quarks, 2.6 TeV in a W' model, a range of masses starting from mZ' = 1.5 TeV and couplings from gq = 0.2 in a Z' model; and contact interactions with a compositeness scale below 12.0 TeV and 17.5 TeV respectively for destructive and constructive interference between the new interaction and QCD processes. These results significantly extend the ATLAS limits obtained from 8 TeV data. As a result, gaussian-shaped contributions to the mass distribution are also excluded if the effective cross-section exceeds values ranging from approximately 50-300 fb for masses below 2 TeV to 2-20 fb for masses above 4 TeV.
Book Synopsis Search for New Phenomena in Dijet Angular Distributions Measured with the ATLAS Detector in Proton-Proton Collisions at Sqrt(s) by : Thorsten Dietzsch
Download or read book Search for New Phenomena in Dijet Angular Distributions Measured with the ATLAS Detector in Proton-Proton Collisions at Sqrt(s) written by Thorsten Dietzsch and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for New Phenomena in Dijet Angular Distributions Measured with the ATLAS Detector in Proton-proton Collisions at √s _327 7 TeV by : Thorsten A. Dietzsch
Download or read book Search for New Phenomena in Dijet Angular Distributions Measured with the ATLAS Detector in Proton-proton Collisions at √s _327 7 TeV written by Thorsten A. Dietzsch and published by . This book was released on 2013 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for New Phenomena in the Dijet Mass Distribution Using Pp Collision Data at S by :
Download or read book Search for New Phenomena in the Dijet Mass Distribution Using Pp Collision Data at S written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dijet events produced in LHC proton-proton collisions at a center-of-mass energy \(\sqrt{s}=8\) TeV are studied with the ATLAS detector using the full 2012 data set, with an integrated luminosity of 20.3 fb-1. Dijet masses up to about 4.5 TeV are probed. Resonancelike features are not observed in the dijet mass spectrum. Limits on the cross section times acceptance are set at the 95% credibility level for various hypotheses of new phenomena in terms of mass or energy scale, as appropriate. The analysis excludes excited quarks with a mass below 4.06 TeV, color-octet scalars with a mass below 2.70 TeV, heavy W' bosons with a mass below 2.45 TeV, chiral W* bosons with a mass below 1.75 TeV, and quantum black holes with six extra space-time dimensions with threshold mass below 5.66 TeV.
Book Synopsis Search for New Phenomena in the Dijet Mass Distribution Using [math Display by :
Download or read book Search for New Phenomena in the Dijet Mass Distribution Using [math Display written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dijet events produced in LHC proton-proton collisions at a center-of-mass energy \(\sqrt{s}=8\) TeV are studied with the ATLAS detector using the full 2012 data set, with an integrated luminosity of 20.3 fb-1. Dijet masses up to about 4.5 TeV are probed. Resonancelike features are not observed in the dijet mass spectrum. Limits on the cross section times acceptance are set at the 95% credibility level for various hypotheses of new phenomena in terms of mass or energy scale, as appropriate. The analysis excludes excited quarks with a mass below 4.06 TeV, color-octet scalars with a mass below 2.70 TeV, heavy W' bosons with a mass below 2.45 TeV, chiral W* bosons with a mass below 1.75 TeV, and quantum black holes with six extra space-time dimensions with threshold mass below 5.66 TeV.
Book Synopsis Search for New Phenomena in Dijet Angular Distributions Measured with the ATLAS Detector in Proton-proton Collisons at √s by :
Download or read book Search for New Phenomena in Dijet Angular Distributions Measured with the ATLAS Detector in Proton-proton Collisons at √s written by and published by . This book was released on 2013 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strong Coupling Gauge Theories In The Lhc Perspective (Scgt 12) - Proceedings Of The Kmi-gcoe Workshop by : Yasumichi Aoki
Download or read book Strong Coupling Gauge Theories In The Lhc Perspective (Scgt 12) - Proceedings Of The Kmi-gcoe Workshop written by Yasumichi Aoki and published by World Scientific. This book was released on 2014-01-13 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains contributions which are largely focused on strong coupling gauge theories and the search of theories beyond the standard model, as well as new aspects in hot and dense QCD — particularly in view of the LHC experiments and the lattice studies of conformal fixed point.It contains, among others, many of the latest and important reports on walking technicolor and related subjects in the general context of conformality, discussions of phenomenological implications with the LHC, as well as the theoretical ones through lattice studies. Nonperturbative studies like lattice simulations and stringy/holographic approaches are extensively elaborated in close relation to phenomenological studies. Also, heavy ion experiments at LHC are discussed in such nonperturbative approaches.
Book Synopsis The Dijet Mass Spectrum and Angular Distributions with the D0 Detector by :
Download or read book The Dijet Mass Spectrum and Angular Distributions with the D0 Detector written by and published by . This book was released on 1996 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present preliminary results from an analysis of dijet data collected during the 1994-95 Tevatron Collider run with an integrated luminosity of 91 pb−1. Measurements of dijet mass spectra and dijet angular distributions in {anti p}p collisions at (square root)s- = 1.8 TeV are compared with next-to-leading order QCD theory.
Book Synopsis Measurement of Dijet Angular Distributions at Sqrt{s} by :
Download or read book Measurement of Dijet Angular Distributions at Sqrt{s} written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the first measurement of dijet angular distributions in p{bar p} collisions at (square root)s = 1.96 TeV at the Fermilab Tevatron Collider. The measurement is based on a dataset corresponding to an integrated luminosity of 0.7 fb−1 collected with the D0 detector. Dijet angular distributions have been measured over a range of dijet masses, from 0.25 TeV to above 1.1 TeV. The data are in good agreement with the predictions of perturbative QCD and are used to constrain new physics models including quark compositeness, large extra dimensions, and TeV−1 scale extra dimensions. For all models considered, we set the most stringent direct limits to date.
Book Synopsis Dijet Angular Distributions in Pp̄ Collisions at [square Root] S by : Mary Kathryn Fatyga
Download or read book Dijet Angular Distributions in Pp̄ Collisions at [square Root] S written by Mary Kathryn Fatyga and published by . This book was released on 1996 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct Photon Center-of-Mass Angular Distributions in $p\bar{p}$ Collisions at $\sqrt{s}$ by :
Download or read book Direct Photon Center-of-Mass Angular Distributions in $p\bar{p}$ Collisions at $\sqrt{s}$ written by and published by . This book was released on 1992 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: The center-of-mass angular distribution of direct photon events, resulting from proton-antiproton collisions at a center-of-mass energy of 1.8 TeV, as measured by the Collider Detector at Fermi lab (CDF) during the 1988-1089 experimental run, is presented. The direct photon events are identified primarily through the direct photon's characteristic isolation from other particles. The main source of background is from rare fragmentation of QCD partons into single isolated neutral mesons, which decay into two or more photons. The background is removed statistically by exploitation of tile expected difference in the resulting shower profiles. The resulting angular distribution for direct photons, in the transverse momentum range from 22 to 45 Ge V is found to agree favorably with the predictions of Quantum Cbromodynamics (QCD) for an interaction with a fermion (spin 1/2) propagator.
Book Synopsis The Dijet Mass Spectrum and Angular Distributions with the DØ Detector by :
Download or read book The Dijet Mass Spectrum and Angular Distributions with the DØ Detector written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dijet Production From[bar P]p Collisions at 1.8 TeV. by :
Download or read book Dijet Production From[bar P]p Collisions at 1.8 TeV. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The production properties of dijets from[ital p[anti p]] collisions at[radical][ital s]= 1.8 TeV have been studied using the Collider Detector at Fermilab. This report presents an analysis of the dijet angular distributions using 106 pb[sup -1] of data collected during Run I of the Tevatron Collider. The measured angular distributions agree with next-to-leading order QCD predictions in five dijet invariant mass regions with average dijet mass varying from 263 to 698 GeV/c[sup 2]. The predicted angular distributions are relatively insensitive to parton distribution functions, and therefore these data can be used to put limits on energy scale parameters used to describe contact interactions. For a model with only up and down quarks composite, the data exclude at 95% confidence level a contact interaction scale[Lambda][sub[ital ud]][sup+][
Book Synopsis Search for New Phenomena in Ttbar Events with Large Missing Transverse Momentum in Proton-Proton Collisions at Sqrt(s) by :
Download or read book Search for New Phenomena in Ttbar Events with Large Missing Transverse Momentum in Proton-Proton Collisions at Sqrt(s) written by and published by . This book was released on 2013 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book We Have No Idea written by Jorge Cham and published by Penguin. This book was released on 2018-05-08 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepare to learn everything we still don’t know about our strange and mysterious universe Humanity's understanding of the physical world is full of gaps. Not tiny little gaps you can safely ignore —there are huge yawning voids in our basic notions of how the world works. PHD Comics creator Jorge Cham and particle physicist Daniel Whiteson have teamed up to explore everything we don't know about the universe: the enormous holes in our knowledge of the cosmos. Armed with their popular infographics, cartoons, and unusually entertaining and lucid explanations of science, they give us the best answers currently available for a lot of questions that are still perplexing scientists, including: * Why does the universe have a speed limit? * Why aren't we all made of antimatter? * What (or who) is attacking Earth with tiny, superfast particles? * What is dark matter, and why does it keep ignoring us? It turns out the universe is full of weird things that don't make any sense. But Cham and Whiteson make a compelling case that the questions we can't answer are as interesting as the ones we can. This fully illustrated introduction to the biggest mysteries in physics also helpfully demystifies many complicated things we do know about, from quarks and neutrinos to gravitational waves and exploding black holes. With equal doses of humor and delight, Cham and Whiteson invite us to see the universe as a possibly boundless expanse of uncharted territory that's still ours to explore.
Download or read book LHC Physics written by T. Binoth and published by CRC Press. This book was released on 2012-04-25 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploring the phenomenology of the Large Hadron Collider (LHC) at CERN, LHC Physics focuses on the first years of data collected at the LHC as well as the experimental and theoretical tools involved. It discusses a broad spectrum of experimental and theoretical activity in particle physics, from the searches for the Higgs boson and physics beyond the Standard Model to studies of quantum chromodynamics, the B-physics sector, and the properties of dense hadronic matter in heavy-ion collisions. Covering the topics in a pedagogical manner, the book introduces the theoretical and phenomenological framework of hadron collisions and presents the current theoretical models of frontier physics. It offers overviews of the main detector components, the initial calibration procedures, and search strategies. The authors also provide explicit examples of physics analyses drawn from the recently shut down Tevatron. In the coming years, or perhaps even sooner, the LHC experiments may reveal the Higgs boson and offer insight beyond the Standard Model. Written by some of the most prominent and active researchers in particle physics, this volume equips new physicists with the theory and tools needed to understand the various LHC experiments and prepares them to make future contributions to the field.
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