88 38

Measurement of double-differential cross sections for top quark pair production in pp collisions at root s=8 TeV and impact on parton distribution functions

Title
Measurement of double-differential cross sections for top quark pair production in pp collisions at root s=8 TeV and impact on parton distribution functions
Author
김태정
Keywords
3-LOOP SPLITTING FUNCTIONS; QCD; DENSITIES; EVOLUTION; ORDER
Issue Date
2017-07
Publisher
SPRINGER
Citation
EUROPEAN PHYSICAL JOURNAL C, v. 77, no. 7, Article no. 459
Abstract
Normalized double-differential cross sections for top quark pair (t (t) over bar) production are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 19.7 fb(-1). The measurement is performed in the dilepton e(+/-)mu(+/-) final state. The tt cross section is determined as a function of various pairs of observables characterizing the kinematics of the top quark and tt system. The data are compared to calculations using perturbative quantum chromodynamics at next-to-leading and approximate next-to-next-to-leading orders. They are also compared to predictions of Monte Carlo event generators that complement fixed-order computations with parton showers, hadronization, and multiple-parton interactions. Overall agreement is observed with the predictions, which is improved when the latest global sets of proton parton distribution functions are used. The inclusion of the measured tt cross sections in a fit of parametrized parton distribution functions is shown to have significant impact on the gluon distribution.
URI
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-017-4984-5https://repository.hanyang.ac.kr/handle/20.500.11754/114871
ISSN
1434-6044; 1434-6052
DOI
10.1140/epjc/s10052-017-4984-5
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
Files in This Item:
Measurement of double-differential cross sections for top quark pair production in pp collisions at root s=8 TeV and impact on parton distribution ...Download
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE