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 Multijet Cross Section Ratios in Pp Collisions at square Root S equals 1 8 TeV written by Ki Suk Hahn and published by . This book was released on 1998 with total page 216 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 Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Ratio of Differential Cross Sections sigma p bar p to Z B Jet sigma p bar p to Z Jet in p bar p Collisions at sqrt s written by and published by . This book was released on 2013 with total page 8 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 the B c pm Production Cross Section in p bar p 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: Here, we describe a measurement of the ratio of the cross sections times branching fractions of the Bc+ meson in the decay mode Bc+ → J/[psi][mu]+[nu] to the B+ meson in the decay mode B+ → J/[psi]K+ in proton-antiproton collisions at center-of-mass energy √s = 1.96 TeV. The measurement is based on the complete CDF Run II data set, which comes from an integrated luminosity of 8.7 fb-1. The ratio of the production cross sections times branching fractions for Bc+ and B+ mesons with momentum transverse to the beam greater than 6 GeV/c and rapidity magnitude smaller than 0.6 is 0.211 ± 0.012(stat)-0.020+0.021(syst). Using the known B+ → J/[psi]K+ branching fraction, the known B+ production cross section, and a selection of the predicted Bc+ → J/[psi][mu]+[nu] branching fractions, the range for the total Bc+ production cross section is estimated.

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 A Measurement of the Ratio of Inclusive Cross Sections sigma p bar p rightarrow Z b rm Jet sigma p bar p rightarrow Z rm Jet at sqrt s written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ratio of the cross section for p{bar p} interactions producing a Z boson and at least one b quark jet to the inclusive Z+jet cross section is measured using 4.2 fb−1 of p{bar p} collisions collected with the D0 detector at the Fermilab Tevatron collider at √s = 1.96 TeV. The Z → l+l− candidate events with at least one b jet are discriminated from Z+ charm and light jet(s) events by a novel technique that exploits the properties of the tracks associated to the jet. The measured ratio is 0.0193 ± 0.0027 for events having a jet with transverse momentum p{sub T} > 20 GeV and pseudorapidity.

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 W Jets Differential Cross sections in p bar p Collisions at sqrt s written by and published by . This book was released on 2016 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis the measurements of differential cross sections for the production of the $W$-boson in association with jets in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV are presented. The measurements are based on 9.0 fb$^{-1}$ of CDF Run II data (i.e., the full dataset). Only events in which the W-boson decays leptonically (i.e., W 2!ev and W 2![mu]v)and at least one jet is present are considered. The lepton candidates are required to have a transverse energy $E^{\ell}_T> 25$GeV and pseudorapidity in the range l.

Download or read book A Precision Measurement of the Prompt Photon Cross Section in P bar P Collisions at square Root s written by and published by . This book was released on 1994 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A prompt photon cross section measurement from the CDF experiment at the Fermilab p{bar p} Collider is presented Detector and trigger upgrades, as well as six times the integrated luminosity compared with our previous publication, have contributed to a much more precise measurement and extended P{sub T} range. As before, the cross section agrees qualitatively with QCD calculations but has a steeper slope at low P{sub T}.

Download or read book Measurements of Jet and Multijet Cross Sections with the CDF Detector written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent measurements of jet and multijet production cross sections from p{bar p} collisions recorded with the Collider Detector at Fermilab (CDF) are summarized. First Run II results of the inclusive one jet cross section at (square root)s = 1.96 TeV as well as prospects for future extensions of this measurement are presented. We also studied the properties of three-jet events in Run Ib data at (square root)s = 1.8 TeV. All results are compared to predictions of Quantum Chromodynamics at next-to-leading order perturbation theory.

Download or read book Two Jet Differential Cross Section and Structure Functions in P p Collisions at square Root Sign S written by Robert M. Harris and published by . This book was released on 1989 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Inclusive Jet Cross Section in bar P p Collisions at written by and published by . This book was released on 1996 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the preliminary measurement of the inclusive jet cross section for {vert_bar}[eta]{vert_bar} [less than or equal to] 0.5 at [square root]s = 1.8 TeV. Two data sets with integrated luminosities of 91 pb−1 and 14 pb−1 were collected at the Fermilab Tevatron {ovr p}p Collider with the D0 detector. The inclusive jet cross sections are measured and reported as a function of transverse jet energy (35 GeV [less than or equal to] E{sub T} [less than or equal to] 470 GeV) are in excellent agreement with next-to-leading order QCD. 11 refs., 4 figs.

Download or read book Measurement of the t bar t Production Cross Section in p bar p Collisions at sqrt s written by and published by . This book was released on 2004 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Double Differential Diject Mass Cross Section in Pp bar Collisions at Sqrt s written by and published by . This book was released on 2009 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the analysis of the double differential dijet mass cross section, measured at the D0 detector in Batavia, IL, using p{bar p} collisions at a center of mass energy of (square root)s = 1.96 TeV. The dijet mass was calculated using the two highest p{sub T} jets in the event, with approximately 0.7 fb−1 of data collected between 2004 and 2005. The analysis was presented in bins of dijet mass (M{sub JJ}) and rapidity (y), and extends the measurement farther in M{sub JJ} and y than any previous measurement. Corrections due to detector effects were calculated using a Monte Carlo simulation and applied to data. The errors on the measurement consist of statistical and systematic errors, of which the Jet Energy Scale was the largest. The final result was compared to next-to-leading order theory and good agreement was found. These results may be used in the determination of the proton parton distribution functions and to set limits on new physics.