On the ratio of t(t)over-barb(b)over-bar and t(t)over-barjj cross sections at the CERN Large Hadron Collider

被引：0

作者：

Bevilacqua, G. ^{[1
]}

Worek, M. ^{[2
]}

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[2] Rhein Westfal TH Aachen, Inst Theoret Particle Phys & Cosmol, D-52056 Aachen, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 07期

关键词：

QCD Phenomenology; NLO Computations; HELAC;

D O I：

10.1007/JHEP07(2014)135

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Triggered by ongoing experimental analyses, we report on a study of the cross section ratio sigma(pp -> t (t) over barb(b)over bar>)/sigma(pp -> t(t)over bar>jj) at the next-to-leading order in QCD, focusing on both present and future collider energies: root s = 7, 8, 13 TeV. In particular, we provide a comparison between our predictions and the currently available CMS data for the 8 TeV run. We further analyse the kinematics and scale uncertainties of the two processes for a single set of parton distribution functions, with the goal of assessing possible correlations that might help to reduce the theoretical error of the ratio and thus enhance the predictive power of this observable. We argue that the different jet kinematics makes the t(t)over bar>b(b)over bar> and t(t)over bar>jj processes uncorrelated in several observables, and show that the scale uncertainty is not significantly reduced when taking the ratio of the cross sections.

引用

页数：23

共 59 条

[1] Search for the Standard Model Higgs boson produced in association with a vector boson and decaying to a b-quark pair with the ATLAS detector [J].

Aad, G. ;

Abbott, B. ;

Abdallah, J. ;

Khalek, S. Abdel ;

Abdelalim, A. A. ;

Abdinov, O. ;

Abi, B. ;

Abolins, M. ;

AbouZeid, O. S. ;

Abramowicz, H. ;

Abreu, H. ;

Acerbi, E. ;

Acharya, B. S. ;

Adamczyk, L. ;

Adams, D. L. ;

Addy, T. N. ;

Adelman, J. ;

Adomeit, S. ;

Adragna, P. ;

Adye, T. ;

Aefsky, S. ;

Aguilar-Saavedra, J. A. ;

Agustoni, M. ;

Aharrouche, M. ;

Ahlen, S. P. ;

Ahles, F. ;

Ahmad, A. ;

Ahsan, M. ;

Aielli, G. ;

Akdogan, T. ;

Akesson, T. P. A. ;

Akimoto, G. ;

Akimov, A. V. ;

Alam, M. S. ;

Alam, M. A. ;

Albert, J. ;

Albrand, S. ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alessandria, F. ;

Alexa, C. ;

Alexander, G. ;

Alexandre, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Aliev, M. ;

Alimonti, G. ;

Alison, T. J. ;

Allbrooke, B. M. M. ;

Allport, P. P. .

PHYSICS LETTERS B, 2012, 718 (02) :369-390

[2] Hadronic top-quark pair-production with one jet and parton showering [J].

Alioli, Simone ;

Moch, Sven-Olaf ;

Uwer, Peter .

JOURNAL OF HIGH ENERGY PHYSICS, 2012, (01)

[3] A standard format for Les Houches Event Files [J].

Alwall, J. ;

Ballestrero, A. ;

Bartalini, P. ;

Belov, S. ;

Boos, E. ;

Buckley, A. ;

Butterworth, J. M. ;

Dudko, L. ;

Frixione, S. ;

Garren, L. ;

Gieseke, S. ;

Gusev, A. ;

Hinchliffe, I. ;

Huston, J. ;

Kersevan, B. ;

Krauss, F. ;

Lavesson, N. ;

Lonnblad, L. ;

Maina, E. ;

Maltoni, F. ;

Mangano, M. L. ;

Moortgat, F. ;

Mrenna, S. ;

Papadopoulos, C. G. ;

Pittau, R. ;

Richardson, P. ;

Seymour, M. H. ;

Sherstnev, A. ;

Sjostrand, T. ;

Skands, P. ;

Slabospitsky, S. R. ;

Was, Z. ;

Webber, B. R. ;

Worek, M. ;

Zeppenfeld, D. .

COMPUTER PHYSICS COMMUNICATIONS, 2007, 176 (04) :300-304

[4]

[Anonymous], ARXIV10034953

[5]

[Anonymous], CMSPASHIG140202

[6]

[Anonymous], HEPPH0605240 RC GROU

[7]

[Anonymous], ATLASCONF2012135

[8]

[Anonymous], CMSPASHIG13019

[9]

[Anonymous], ARXIV13095912

[10]

[Anonymous], MEAS TOP QUARK UNPUB

← 1 2 3 4 5 6 →