Download or read book Measurement of the Ratio of the 3 jet to 2 jet Cross Sections in Pp Collisions at Sqrt s written by and published by . This book was released on 2011 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: A measurement of the ratio of the inclusive 3-jet to 2-jet cross sections as a function of the total jet transverse momentum, HT, in the range 0.2 HT

Download or read book Measurement of the Ratio of the Inclusive 3 jet Cross Section to the Inclusive 2 jet Cross Section in Pp Collisions at sqrt s written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Ratio of Three jet to Two jet Cross Sections in p bar p Collisions at sqrt s written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Inclusive Jet Cross Section in Pp Collisions at Sqrt s written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The inclusive jet cross section is measured in pp collisions with a center-of-mass energy of 7 TeV at the LHC using the CMS experiment. The data sample corresponds to an integrated luminosity of 34 inverse picobarns. The measurement is made for jet transverse momenta in the range 18-1100 GeV and for absolute values of rapidity less than 3. The measured cross section extends to the highest values of jet pT ever observed and, within the experimental and theoretical uncertainties, is generally in agreement with next-to-leading-order perturbative QCD predictions.

Download or read book Multijet Cross Section Ratios in Pbar P Collisions at Square Root S written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have measured the ratio of the three-jet to two-jet inclusive cross section as a function of the total transverse energy of jets (H[sub T]=[summation]E[sup j][sub T]) in events in p[anti p] collisions at [radical]s=1.8 TeV. We find that for [summation]E[sub T]>200 GeV there is a 70% probability of emitting an additional jet with E[sub T>20 GeV. Using this measurement and the framework of the theory of Quantum Chromodynamics (QCD), we investigated the size of the renormalization scale used to model emission of ''soft'' (low-E[sub T]) jets in multijet final states. The findings indicate that, to order [alpha][sub s][sup 3] in QCD the data favor a scale representative of the hard scattering rather than a softer scale of the order of the third jet's transverse momentum. The preferred scale is [mu][sub R][approx]1/4 H[sub T].

Download or read book Measurement of the Inclusive and Dijet Cross sections of B jets in Pp Collisions at Sqrt s written by and published by . This book was released on 2013 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Inclusive Jet Cross sections in Pp and PbPb Collisions at sqrt s NN written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Inclusive jet spectra from pp and PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV, collected with the CMS detector at the LHC, are presented. Jets are reconstructed with three different distance parameters for transverse momentum ($p_{\mathrm{T}}$) greater than 70 GeV/$c$ and pseudorapidity $

Download or read book QCD Radiation in Top Antitop and Z Jets Final States written by Kiran Joshi and published by Springer. This book was released on 2015-06-12 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis contains new research in both experimental and theoretical particle physics, making important contributions in each. Two analyses of collision data from the ATLAS experiment at the LHC are presented, as well as two phenomenological studies of heavy coloured resonances that could be produced at the LHC. The first data analysis was the measurement of top quark-antiquark production with a veto on additional jet activity. As the first detector-corrected measurement of jet activity in top-antitop events it played an important role in constraining the theoretical modelling, and ultimately reduced these uncertainties for ATLAS's other top-quark measurements by a factor of two. The second data analysis was the measurement of Z+2jet production and the observation of the electroweak vector boson fusion (VBF) component. As the first observation of VBF at a hadron collider, this measurement demonstrated new techniques to reliably extract VBF processes and paved the way for future VBF Higgs measurements. The first phenomenological study developed a new technique for identifying the colour of heavy resonances produced in proton-proton collisions. As a by-product of this study an unexpected and previously unnoticed correlation was discovered between the probability of correctly identifying a high-energy top and the colour structure of the event it was produced in. The second phenomenological study explored this relationship in more detail, and could have important consequences for the identification of new particles that decay to top quarks.

Download or read book Measurement and QCD Analysis of Double differential Inclusive Jet Cross sections in Pp 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 measurement of the double-differential inclusive jet cross section as a function of the jet transverse momentum $p_{\mathrm{T}}$ and the absolute jet rapidity $

Download or read book Measurement of the Tt Production Cross Section in Pp Collisions at square Root S written by Heather L. Ray and published by . This book was released on 2004 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Three jet Mass Cross Section in p bar p Collisions at sqrt s written by and published by . This book was released on 2010 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the measurement of the inclusive three-jet cross section in proton-antiproton collisions at (square root)s = 1.96 TeV measured at the D0 experiment at the Fermilab Tevatron Collider in the Fermi National Accelerator Laboratory, Batavia, Illinois, USA. The cross section as a function of three-jet invariant mass is provided in three regions of the third jet transverse momentum and three regions of jet rapidities. It utilizes a data sample collected in the so called Run IIa data taking period (2002-2006) corresponding to the integrated luminosity of about 0.7 fb−1. The results are used to test the next-to-leading order predictions of Quantum chromodynamics computed using the latest parton distribution functions.

Download or read book Measurement of Three jet Production Cross sections in Pp Collisions at 7 TeV Centre of mass Energy Using the ATLAS Detector written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Double-differential three-jet production cross-sections are measured in proton-proton collisions at a centre-of-mass energy of √s = 7TeV using the ATLAS detector at the large hadron collider. The measurements are presented as a function of the three-jet mass (mjjj), in bins of the sum of the absolute rapidity separations between the three leading jets (

Download or read book The Ratio of Inclusive Jet Cross Sections at Square Root S written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents an analysis of hadronic jet production from proton-antiproton collisions at two center-of-mass energies. Measurements were performed in the central region ([eta]

Download or read book Comparison of the Z gamma Jets to gamma Jets Cross Sections in Pp Collisions at sqrt s written by and published by . This book was released on 2015 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a comparison of the differential cross sections for the processes Z/[gamma] * + jets and photon ([gamma])+jets is presented. The measurements are based on data collected with the CMS detector at √s = 8 TeV corresponding to an integrated luminosity of 19.7 fb-1. The differential cross sections and their ratios are presented as functions of pT. The measurements are also shown as functions of the jet multiplicity. Differential cross sections are obtained as functions of the ratio of the Z/[gamma]* pT to the sum of all jet transverse momenta and of the ratio of the Z/[gamma]* pT to the leading jet transverse momentum. The data are corrected for detector effects and are compared to simulations based on several QCD calculations.

Download or read book Measurement of the Production Cross Sections for a Z Boson and One Or More B Jets in Pp Collisions at Sqrt s written by and published by . This book was released on 2014 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of a Z boson, decaying into two leptons and produced in association with one or more b jets, is studied using proton-proton collisions delivered by the LHC at a centre-of-mass energy of 7 TeV. The data were recorded in 2011 with the CMS detector and correspond to an integrated luminosity of 5 fb-1. The Z(ll) + b-jets cross sections (where ll = [mu][mu] or ee) are measured separately for a Z boson produced with exactly one b jet and with at least two b jets. In addition, a cross section ratio is extracted for a Z boson produced with at least one b jet, relative to a Z boson produced with at least one jet. The measured cross sections are compared to various theoretical predictions, and the data favour the predictions in the five-flavour scheme, where b quarks are assumed massless. The kinematic properties of the reconstructed particles are compared with the predictions from the MadGraph event generator using the pythia parton shower simulation.

Download or read book Measurement of the Ratio of Inclusive Jet Cross Sections Using the Anti kt Algorithm with Radius Parameters R written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the inclusive jet cross section with the anti-kt clustering algorithm are presented for two radius parameters, R=0.5 and 0.7. They are based on data from LHC proton-proton collisions at $\sqrt{s}$ = 7 TeV corresponding to an integrated luminosity of 5.0 inverse femtobarns collected with the CMS detector in 2011. The ratio of these two measurements is obtained as a function of the rapidity and transverse momentum of the jets. Significant discrepancies are found comparing the data to leading-order simulations and to fixed-order calculations at next-to-leading order, corrected for nonperturbative effects, whereas simulations with next-to-leading-order matrix elements matched to parton showers describe the data best.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: