Measurement of the mass difference between top quark and antiquark in pp collisions at root s=8 TeV

Chatrchyan, S.; Adžić, Petar; Đorđević, Miloš; Ekmedžić, Marko; Milošević, Jovan; Milenović, Predrag; Reković, Vladimir

doi:10.1016/j.physletb.2017.04.028

2017

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Chatrchyan, S.
Adžić, Petar
Đorđević, Miloš

CMS Collaboration (ukupan broj autora: 2204)

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Abstract

The invariance of the standard model (SM) under the CPT transformation predicts equality of particle and antiparticle masses. This prediction is tested by measuring the mass difference between the top quark and antiquark (Delta m(t) = m(t) - m((t) over bar)) that are produced in pp collisions at a center-of-mass energy of 8 TeV, using events with a muon or an electron and at least four jets in the final state. The analysis is based on data corresponding to an integrated luminosity of 19.6 fb(-1) collected by the CMS experiment at the LHC, and yields a value of Delta m(t) = 0.15 0.19 (stat) +/- 0.09(syst) GeV, which is consistent with the SM expectation. This result is significantly more precise than previously reported measurements. (C) 2017 The Author(s). Published by Elsevier B.V.

Keywords:

CMS / Top quark physics

Source:
Physics Letters B, 2017, 770, 50-71

Funding / 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), SENESCYT (Ecuador), 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), BUAP (Mexico), CINVESTAV (Mexico), CONACYT (Mexico), LNS (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 (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 the Foundation for Polish Science, European Union, Regional Development Fund, Mobility Plus programme of the Ministry of Science and Higher Education, National Science Center (Poland) [Harmonia 2014/14/M/ST2/00428, Opus 2013/11/B/ST2/04202, 2014/13/B/ST2/02543, 2014/15/B/ST2/ 03998, Sonata-bis 2012/07/E/ST2/01406], Thalis programme - EU-ESF, Aristeia programme - EU-ESF, Greek NSRF, National Priorities Research Program by Qatar National Research Fund, Programa Clarin-COFUND del Principado de Asturias, Rachadapisek Sompot Fund for Postdoctoral Fellowship (Thailand), Chulalongkorn University (Thailand), Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand), Welch Foundation [C-1845], EPLANET (European Union)

DOI: 10.1016/j.physletb.2017.04.028

ISSN: 0370-2693; 1873-2445

WoS: 000404196500007

Scopus: 2-s2.0-85018793858

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	9

TY  - JOUR
AU  - Chatrchyan, S.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Ekmedžić, Marko
AU  - Milošević, Jovan
AU  - Milenović, Predrag
AU  - Reković, Vladimir
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1617
AB  - The invariance of the standard model (SM) under the CPT transformation predicts equality of particle and antiparticle masses. This prediction is tested by measuring the mass difference between the top quark and antiquark (Delta m(t) = m(t) - m((t) over bar)) that are produced in pp collisions at a center-of-mass energy of 8 TeV, using events with a muon or an electron and at least four jets in the final state. The analysis is based on data corresponding to an integrated luminosity of 19.6 fb(-1) collected by the CMS experiment at the LHC, and yields a value of Delta m(t) = 0.15 0.19 (stat) +/- 0.09(syst) GeV, which is consistent with the SM expectation. This result is significantly more precise than previously reported measurements. (C) 2017 The Author(s). Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Measurement of the mass difference between top quark and antiquark in pp collisions at root s=8 TeV
VL  - 770
SP  - 50
EP  - 71
DO  - 10.1016/j.physletb.2017.04.028
ER  -

@article{
author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Ekmedžić, Marko and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir",
year = "2017",
abstract = "The invariance of the standard model (SM) under the CPT transformation predicts equality of particle and antiparticle masses. This prediction is tested by measuring the mass difference between the top quark and antiquark (Delta m(t) = m(t) - m((t) over bar)) that are produced in pp collisions at a center-of-mass energy of 8 TeV, using events with a muon or an electron and at least four jets in the final state. The analysis is based on data corresponding to an integrated luminosity of 19.6 fb(-1) collected by the CMS experiment at the LHC, and yields a value of Delta m(t) = 0.15 0.19 (stat) +/- 0.09(syst) GeV, which is consistent with the SM expectation. This result is significantly more precise than previously reported measurements. (C) 2017 The Author(s). Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Measurement of the mass difference between top quark and antiquark in pp collisions at root s=8 TeV",
volume = "770",
pages = "50-71",
doi = "10.1016/j.physletb.2017.04.028"
}

Chatrchyan, S., Adžić, P., Đorđević, M., Ekmedžić, M., Milošević, J., Milenović, P.,& Reković, V.. (2017). Measurement of the mass difference between top quark and antiquark in pp collisions at root s=8 TeV. in Physics Letters B, 770, 50-71.
https://doi.org/10.1016/j.physletb.2017.04.028

Chatrchyan S, Adžić P, Đorđević M, Ekmedžić M, Milošević J, Milenović P, Reković V. Measurement of the mass difference between top quark and antiquark in pp collisions at root s=8 TeV. in Physics Letters B. 2017;770:50-71.
doi:10.1016/j.physletb.2017.04.028 .

Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Ekmedžić, Marko, Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Measurement of the mass difference between top quark and antiquark in pp collisions at root s=8 TeV" in Physics Letters B, 770 (2017):50-71,
https://doi.org/10.1016/j.physletb.2017.04.028 . .