Download or read book Direct Photon Center of mass Angular Distribution in Proton antiproton Collisions at square Root s written by Leslie F. Nakae and published by . This book was released on 1992 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book The Center of mass Angular Distribution of Prompt Photons Produced in P bar P Collisions at square Root s written by and published by . This book was released on 1993 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data taken with the Collider Detector at Fermilab (CDF) during the 1992--1993 run of the Tevatron are used to measure the distribution of the center-of-mass angle between isolated prompt photons and the beam direction. The shape of the angular distribution for photon-jet events is found to differ from the predictions of NLO QCD.

Download or read book Measurement of the Square Root of S Dependence of Isolated Direct Photon Production in Proton antiproton Collisions written by Dana Partos and published by . This book was released on 2001 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inclusive Direct Photon Production in the Central and Forward Rapidity Regions in Proton antiproton Collisions at a Center of Mass Energy of 1800 GeV written by Steven A. Jerger and published by . This book was released on 1997 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inclusive Direct Photon Production in the Central and Forward Rapidity Regions in Proton Anti proton Collisions at a Center of mass Energy of 1800 GeV written by and published by . This book was released on 1997 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of isolated direct photon production in proton-antiproton collisions at a center of mass energy √s= 1800 Ge V is reported, as measured at the D0 Fermilab Tevatron. Cross sections for the central (0 ≤

Download or read book Photon Production from proton Antiproton Collisions at square Root S written by Thomas Gordon Carter and published by . This book was released on 1990 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soft Photon Production from Proton antiproton Collisions at square Root S written by Charles A. Loomis and published by . This book was released on 1992 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Photon charm Production of proton antiproton Collisions at square root S written by Rowan T. Hamilton and published by . This book was released on 1996 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Search for New Physics in Photon lepton Events in Proton antiproton Collisions at square Root S written by Jeffrey W. Berryhill and published by . This book was released on 2000 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book J psi Production in Proton antiproton Collisions at square Root S written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for Anomalous Production of Photon Jets Missing Transverse Energy in Proton antiproton Collisions at a Center of Mass Energy of 1 96 TeV Using the CDF II Detector written by Samantha K. Hewamanage and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A model-independent signature-based search for physics beyond the Standard Model is performed in the photon + jets + missing transverse energy channel in proton-antiproton collisions at a center of mass energy of 1.96 TeV using the CDF II detector. Events with a photon + jets are predicted by the Standard Model and also by many theoretical models beyond the Standard Model. In the Standard Model, the main mechanisms for photon + jets production include quark-antiquark annihilation and quark-gluon scattering. No intrinsic missing transverse energy is present in any of these Standard Model processes. In this search, photon + [greater-than or equal to] 1 jet and photon + [greater-than or equal to] 2 jet events are analyzed with and without a minimum requirement on the missing transverse energy. Numerous mass distributions and kinematic distributions are studied and no significant excess over the background prediction is found. All results indicate good agreement with expectations of the Standard Model.

Download or read book A Search for New Physics with High Mass Tau Pairs in Proton antiproton Collisions at square Root S written by Zongru Wan and published by . This book was released on 2005 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Event Shapes in Proton antiproton Collisions at the Square Root of S written by Lester A. Pinera and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: This dissertation presents a measurement of event shape variables in proton-antiproton collisions at a center of momentum energy of 1.96 TeV. The observables studied are the transverse thrust and thrust minor, both defined over final state momenta perpendicular to the beam direction. These variables are calculated using unclustered calorimeter energy measured using the CDF-II detector at the Fermi National Accelerator Lab. In addition to differential distributions, we present the evolution of event shape mean values as a function of the leading jet Et. The data is compared to dedicated theoretical predictions (NLO+NLL) and subsequently to PYTHIA Monte Carlo with and without multiple parton interactions. In the presence of an underlying event the observables are found to significantly depart from the predictions of perturbative QCD.

Download or read book A Comparison of Direct Photons in Proton proton and Proton antiproton Interactions at square Root s written by Robert Stuart Kroeger and published by . This book was released on 1986 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the W Boson Mass in Proton antiproton Collisions at square Root Of s written by Qiang Zhu and published by . This book was released on 1994 with total page 101 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.