Measurement of the cross section ratio σtt¯bb¯/σtt¯jj in pp collisions at s=8 TeV

CMS Collaboration

doi:10.1016/j.physletb.2015.04.060

Measurement of the cross section ratio σ_tt¯bb¯/σ_tt¯jj in pp collisions at s=8 TeV

CMS Collaboration

School of Natural Sciences

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The first measurement of the cross section ratio σ_tt¯bb¯/σ_tt¯jj is presented using a data sample corresponding to an integrated luminosity of 19.6 fb⁻¹ collected in pp collisions at s=8 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and four reconstructed jets, including two identified as b quark jets, in the final state are selected. The ratio is determined for a minimum jet transverse momentum p_T of both 20 and 40 GeV/c. The measured ratio is 0.022±0.003(stat)±0.005(syst) for p_T>20 GeV/c. The absolute cross sections σ_tt¯bb¯ and σ_tt¯jj are also measured. The measured ratio for p_T>40 GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order.

Original language	English
Pages (from-to)	132-153
Number of pages	22
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	746
DOIs	https://doi.org/10.1016/j.physletb.2015.04.060
State	Published - 30 Jun 2015

Keywords

CMS
Physics
Top physics

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10.1016/j.physletb.2015.04.060

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@article{93bb7155b2d8425496bc7d386fd4f8f1,

title = "Measurement of the cross section ratio σtt¯bb¯/σtt¯jj in pp collisions at s=8 TeV",

abstract = "The first measurement of the cross section ratio σtt¯bb¯/σtt¯jj is presented using a data sample corresponding to an integrated luminosity of 19.6 fb−1 collected in pp collisions at s=8 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and four reconstructed jets, including two identified as b quark jets, in the final state are selected. The ratio is determined for a minimum jet transverse momentum pT of both 20 and 40 GeV/c. The measured ratio is 0.022±0.003(stat)±0.005(syst) for pT>20 GeV/c. The absolute cross sections σtt¯bb¯ and σtt¯jj are also measured. The measured ratio for pT>40 GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order.",

keywords = "CMS, Physics, Top physics",

author = "\{CMS Collaboration\} and V. Khachatryan and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and T. Bergauer and M. Dragicevic and J. Er{\"o} and C. Fabjan and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{V. M.\} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and W. Kiesenhofer and V. Kn{\"u}nz and M. Krammer and I. Kr{\"a}tschmer and D. Liko and I. Mikulec and D. Rabady and B. Rahbaran and H. Rohringer and R. Sch{\"o}fbeck and J. Strauss and A. Taurok and W. Treberer-Treberspurg and W. Waltenberger and Wulz, \{C. E.\} and V. Mossolov and N. Shumeiko and \{Suarez Gonzalez\}, J. and S. Alderweireldt and M. Bansal and S. Bansal and T. Cornelis and \{De Wolf\}, \{E. A.\} and X. Janssen and A. Knutsson and S. Luyckx and S. Ochesanu and B. Roland and R. Rougny and \{Van De Klundert\}, M. and \{Van Haevermaet\}, H. and \{Van Mechelen\}, P. and \{Van Remortel\}, N. and \{Van Spilbeeck\}, A. and M. Park",

note = "Publisher Copyright: {\textcopyright} 2015 CERN for the benefit of the CMS Collaboration",

year = "2015",

month = jun,

day = "30",

doi = "10.1016/j.physletb.2015.04.060",

language = "English",

volume = "746",

pages = "132--153",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

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TY - JOUR

T1 - Measurement of the cross section ratio σtt¯bb¯/σtt¯jj in pp collisions at s=8 TeV

AU - CMS Collaboration

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Fabjan, C.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Kiesenhofer, W.

AU - Knünz, V.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Taurok, A.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Alderweireldt, S.

AU - Bansal, M.

AU - Bansal, S.

AU - Cornelis, T.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Knutsson, A.

AU - Luyckx, S.

AU - Ochesanu, S.

AU - Roland, B.

AU - Rougny, R.

AU - Van De Klundert, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

AU - Van Spilbeeck, A.

AU - Park, M.

PY - 2015/6/30

Y1 - 2015/6/30

N2 - The first measurement of the cross section ratio σtt¯bb¯/σtt¯jj is presented using a data sample corresponding to an integrated luminosity of 19.6 fb−1 collected in pp collisions at s=8 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and four reconstructed jets, including two identified as b quark jets, in the final state are selected. The ratio is determined for a minimum jet transverse momentum pT of both 20 and 40 GeV/c. The measured ratio is 0.022±0.003(stat)±0.005(syst) for pT>20 GeV/c. The absolute cross sections σtt¯bb¯ and σtt¯jj are also measured. The measured ratio for pT>40 GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order.

AB - The first measurement of the cross section ratio σtt¯bb¯/σtt¯jj is presented using a data sample corresponding to an integrated luminosity of 19.6 fb−1 collected in pp collisions at s=8 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and four reconstructed jets, including two identified as b quark jets, in the final state are selected. The ratio is determined for a minimum jet transverse momentum pT of both 20 and 40 GeV/c. The measured ratio is 0.022±0.003(stat)±0.005(syst) for pT>20 GeV/c. The absolute cross sections σtt¯bb¯ and σtt¯jj are also measured. The measured ratio for pT>40 GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order.

KW - CMS

KW - Physics

KW - Top physics

UR - https://www.scopus.com/pages/publications/85041770789

U2 - 10.1016/j.physletb.2015.04.060

DO - 10.1016/j.physletb.2015.04.060

M3 - Article

AN - SCOPUS:85041770789

SN - 0370-2693

VL - 746

SP - 132

EP - 153

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Measurement of the cross section ratio σ_tt¯bb¯/σ_tt¯jj in pp collisions at s=8 TeV

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