Large Pt Processes In Ppbar Collisions At 2 Tev

DOWNLOAD

Download Large Pt Processes In Ppbar Collisions At 2 Tev PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Large Pt Processes In Ppbar Collisions At 2 Tev book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Large Pt Processes In Ppbar Collisions At 2 Tev

DOWNLOAD
Author : Ashish Kumar
language : en
Publisher:
Release Date : 2005

Large Pt Processes In Ppbar Collisions At 2 Tev written by Ashish Kumar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The measurement of the top-antitop pair production cross section in p{bar p} collisions at {radical}s = 1.96 TeV in the dielectron decay channel using 384 pb{sup -1} of D0 data yields a t{bar t} production cross-section of {sigma}{sub t{bar t}} = 7.9{sub -3.8}{sup +5.2}(stat){sub -1.0}{sup +1.3}(syst) {+-} 0.5 (lumi) pb. This measurement [98] is based on 5 observed events with a prediction of 1.04 background events. The cross-section corresponds to the top mass of 175 GeV, and is in good agreement with the Standard Model expectation of 6.77 {+-} 0.42 pb based on next-to-next-leading-order (NNLO) perturbative QCD calculations [78]. This analysis shows significant improvement from our previous cross-section measurement in this channel [93] with 230 pb{sup -1} dataset in terms of significantly better signal to background ratio and uncertainties on the measured cross-section. Combination of all the dilepton final states [98] yields a yields a t{bar t} cross-section of {sigma}{sub t{bar t}} = 8.6{sub -2.0}{sup +2.3}(stat){sub -1.0}{sup +1.2}(syst) {+-} 0.6(lumi) pb, which again is in good agreement with theoretical predictions and with measurements in other final states. Hence, these results show no discernible deviation from the Standard Model. Fig. 6.1 shows the summary of cross-section measurements in different final states by the D0 in Run II. This measurement of cross-section in the dilepton channels is the best dilepton result from D0 till date. Previous D0 result based on analysis of 230 pb{sup -1} of data (currently under publication in Physics Letters B) is {sigma}{sub t{bar t}} = 8.6{sub -2.7}{sup +3.2}(stat){sub -1.1}{sup +1.1}(syst) {+-} 0.6(lumi) pb. It can be seen that the present cross-section suffers from less statistical uncertainty. This result is also quite consistent with CDF collaboration's result of {sigma}{sub t{bar t}} = 8.6{sub -2.4}{sup +2.5}(stat){sub -1.1}{sup +1.1}(syst) pb. These results have been presented as D0's preliminary results in the high energy physics conferences in the Summer of 2005 (Hadron Collider Physics Symposium, European Physical Society Conference, etc.). The uncertainty on the cross-section is still dominated by statistics due to the small number of observed events. It can be seen that we are at a level where statistical uncertainties are becoming closer to the systematic ones. Future measurements of the cross section will benefit from considerably more integrated luminosity, leading to a smaller statistical error. Thus the next generation of measurements will be limited by systematic uncertainties. Monte Carlo samples with higher statistics are also being generated in order to decrease the uncertainty on the background estimation. In addition, as the jet energy scale, the electron energy scale, the detector resolutions, and the luminosity measurement are fine-tuned, the systematic uncertainties will continue to decrease.

Physics Briefs

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1986

Physics Briefs written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Physics categories.

Inis Atomindex

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1995

Inis Atomindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Nuclear energy categories.

Science Citation Index

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1992

Science Citation Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Science categories.

Vols. for 1964- have guides and journal lists.

Multiple Parton Interactions In Ppbar Collisions In D0 Experiment At The Tevatron Collider

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2016

Multiple Parton Interactions In Ppbar Collisions In D0 Experiment At The Tevatron Collider written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

The thesis is devoted to the study of processes with multiple parton interactions (MPI) in a ppbar collision collected by D0 detector at the Fermilab Tevatron collider at sqrt(s) = 1.96 TeV. The study includes measurements of MPI event fraction and effective cross section, a process-independent parameter related to the effective interaction region inside the nucleon. The measurements are done using events with a photon and three hadronic jets in the final state. The measured effective cross section is used to estimate background from MPI for WH production at the Tevatron energy.

Inclusive Jet Production In Ultrarelativistic Proton Nucleus Collisions

DOWNLOAD
Author : Dennis Perepelitsa
language : en
Publisher:
Release Date : 2014

Inclusive Jet Production In Ultrarelativistic Proton Nucleus Collisions written by Dennis Perepelitsa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

High-pT processes in proton- and deuteron-nucleus collisions at TeV energies are the best presently available way to study the partonic structure of the nucleus in a high-density regime. Jet production over a wide range of phase space can significantly constrain the current knowledge of nuclear parton distribution functions (nPDFs), which are substantially less well understood than the corresponding PDFs in protons and which have only recently begun to be treated in a spatially-dependent way. An accurate knowledge of nPDFs is crucial for a definitive control of perturbative processes in a cold nuclear environment, since high-pT probes are used to quantitatively investigate the hot QCD matter created in ultrarelativistic nucleus-nucleus collisions. Furthermore, jets from low Bjorken-x partons can probe the transition from the dilute to saturated nuclear regimes.

Modern Drawings And Watercolours

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1967

Modern Drawings And Watercolours written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.