Measurement of the cross section ratio sigma(t(t)over-barb(b)over-bar)/sigma(t(t)over-barjj) in pp collisions at root s=8 TeV

Khachatryan, V.; Adžić, Petar; Ekmedzic, M.; Milošević, Jovan; Rekovic, V.; Đorđević, Miloš; Milenović, Predrag

doi:10.1016/j.physletb.2015.04.060

2015

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Authors

Khachatryan, V.
Adžić, Petar
Ekmedzic, M.

Milošević, Jovan

Rekovic, V.
Đorđević, Miloš

Milenović, Predrag

(ukupan broj autora: 2146)

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Abstract

The first measurement of the cross section ratio sigma(t (t) over barb (b) over bar)/sigma(t (t) over bar jj) is presented using a data sample corresponding to an integrated luminosity of 19.6 fb(-1) collected in pp collisions at root s = 8 TeV with the CMS detector at the LHC. Events with two leptons (e or mu) 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) GT 20GeV/c. The absolute cross sections sigma(t (t) over barb (b) over bar) and sigma(t (t) over bar jj) are also measured. The measured ratio for p(T) GT 40 GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order. (C) 2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V.

Keywords:

CMS / Physics / Top physics

Source:
Physics Letters B, 2015, 746, 132-153

Projects:

BMWFW (Austria), FWF (Austria), FNRS (Belgium), FWO (Belgium), CNPq (Brazil), CAPES (Brazil), FAPERJ (Brazil), FAPESP (Brazil), MES (Bulgaria), CERN, CAS (China), MOST (China), NSFC (China), COLCIENCIAS (Colombia), MSES (Croatia), CSF (Croatia), RPF (Cyprus), MoER (Estonia), ERC IUT (Estonia), ERDF (Estonia), Academy of Finland, MEC (Finland), HIP (Finland), CEA (France), CNRS/IN2P3 (France), BMBF, Germany, DFG (Germany), HGF (Germany), GSRT (Greece), OTKA (Hungary), NIH (Hungary), DAE (India), DST (India), IPM (Iran), SFI (Ireland), INFN (Italy), MSIP (Republic of Korea), NRF (Republic of Korea), LAS (Lithuania), MOE (Malaysia), UM (Malaysia), CINVESTAV (Mexico), CONACYT (Mexico), SEP (Mexico), UASLP-FAI (Mexico), MBIE (New Zealand), PAEC (Pakistan), MSHE (Poland), NSC (Poland), FCT (Portugal), JINR (Dubna), MON (Russia), RosAtom (Russia), RAS (Russia), RFBR (Russia), MESTD (Serbia), SEIDI (Spain), CPAN (Spain), Swiss Funding Agencies (Switzerland), MST (Taipei), ThEPCenter (Thailand), IPST (Thailand), STAR (Thailand), NSTDA (Thailand), TUBITAK (Turkey), TAEK (Turkey), NASU (Ukraine), SFFR (Ukraine), STFC (United Kingdom), DOE (USA), NSF (USA), Marie-Curie programme, European Research Council, EPLANET (European Union), Leventis Foundation, A.P. Sloan Foundation, Alexander von Humboldt Foundation, Belgian Federal Science Policy Office, Fonds pour la Formation a la Recherche dans lIndustrie et dans lAgriculture (FRIA-Belgium), Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium), Ministry of Education, Youth and Sports (MEYS) of the Czech Republic, Council of Science and Industrial Research, India, HOMING PLUS programme of Foundation For Polish Science, European Union, Regional Development Fund, Compagnia di San Paolo (Torino), Consorzio per la Fisica (Trieste), MIUR (Italy) [20108T4XTM], Thalis programme, Aristeia programme, EU-ESF, Greek NSRF, National Priorities Research Program by Qatar National Research Fund

DOI: 10.1016/j.physletb.2015.04.060

ISSN: 0370-2693; 1873-2445

WoS: 000355378200022

Scopus: 2-s2.0-85041770789

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TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ekmedzic, M.
AU  - Milošević, Jovan
AU  - Rekovic, V.
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/574
AB  - The first measurement of the cross section ratio sigma(t (t) over barb (b) over bar)/sigma(t (t) over bar jj) is presented using a data sample corresponding to an integrated luminosity of 19.6 fb(-1) collected in pp collisions at root s = 8 TeV with the CMS detector at the LHC. Events with two leptons (e or mu) 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) GT 20GeV/c. The absolute cross sections sigma(t (t) over barb (b) over bar) and sigma(t (t) over bar jj) are also measured. The measured ratio for p(T) GT 40 GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order. (C) 2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Measurement of the cross section ratio sigma(t(t)over-barb(b)over-bar)/sigma(t(t)over-barjj) in pp collisions at root s=8 TeV
VL  - 746
SP  - 132
EP  - 153
DO  - 10.1016/j.physletb.2015.04.060
ER  -

@article{
author = "Khachatryan, V. and Adžić, Petar and Ekmedzic, M. and Milošević, Jovan and Rekovic, V. and Đorđević, Miloš and Milenović, Predrag",
year = "2015",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/574",
abstract = "The first measurement of the cross section ratio sigma(t (t) over barb (b) over bar)/sigma(t (t) over bar jj) is presented using a data sample corresponding to an integrated luminosity of 19.6 fb(-1) collected in pp collisions at root s = 8 TeV with the CMS detector at the LHC. Events with two leptons (e or mu) 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) GT 20GeV/c. The absolute cross sections sigma(t (t) over barb (b) over bar) and sigma(t (t) over bar jj) are also measured. The measured ratio for p(T) GT 40 GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order. (C) 2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Measurement of the cross section ratio sigma(t(t)over-barb(b)over-bar)/sigma(t(t)over-barjj) in pp collisions at root s=8 TeV",
volume = "746",
pages = "132-153",
doi = "10.1016/j.physletb.2015.04.060"
}

Khachatryan V, Adžić P, Ekmedzic M, Milošević J, Rekovic V, Đorđević M, Milenović P. Measurement of the cross section ratio sigma(t(t)over-barb(b)over-bar)/sigma(t(t)over-barjj) in pp collisions at root s=8 TeV. Physics Letters B. 2015;746:132-153

Khachatryan, V., Adžić, P., Ekmedzic, M., Milošević, J., Rekovic, V., Đorđević, M.,& Milenović, P. (2015). Measurement of the cross section ratio sigma(t(t)over-barb(b)over-bar)/sigma(t(t)over-barjj) in pp collisions at root s=8 TeV.
Physics Letters B, 746, 132-153.
https://doi.org/10.1016/j.physletb.2015.04.060

Khachatryan V., Adžić Petar, Ekmedzic M., Milošević Jovan, Rekovic V., Đorđević Miloš, Milenović Predrag, "Measurement of the cross section ratio sigma(t(t)over-barb(b)over-bar)/sigma(t(t)over-barjj) in pp collisions at root s=8 TeV" 746 (2015):132-153,
https://doi.org/10.1016/j.physletb.2015.04.060 .