4.7 Article

First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at √s=13 TeV

期刊

PHYSICS LETTERS B
卷 820, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.physletb.2021.136565

关键词

CMS; Top quark; Dilepton; Charm quark; Charm-tagging; Heavy-flavour

资金

  1. BMBWF (Austria)
  2. FWF (Austria)
  3. FWO (Belgium)
  4. CNPq (Brazil)
  5. CAPES (Brazil)
  6. FAPERJ (Brazil)
  7. FAPERGS (Brazil)
  8. FAPESP (Brazil)
  9. MES (Bulgaria)
  10. CERN
  11. CAS (China)
  12. MOST (China)
  13. NSFC (China)
  14. COLCIENCIAS (Colombia)
  15. MSES (Croatia)
  16. CSF (Croatia)
  17. RIF (Cyprus)
  18. SENESCYT (Ecuador)
  19. MoER (Estonia)
  20. ERC PUT (Estonia)
  21. ERDF (Estonia)
  22. Academy of Finland (Finland)
  23. MEC (Finland)
  24. HIP (Finland)
  25. CEA (France)
  26. CNRS/IN2P3 (France)
  27. BMBF (Germany)
  28. DFG (Germany)
  29. HGF (Germany)
  30. GSRT (Greece)
  31. NKFIA (Hungary)
  32. DAE (India)
  33. DST (India)
  34. IPM (Iran)
  35. SFI (Ireland)
  36. INFN (Italy)
  37. MSIP (Republic of Korea)
  38. NRF (Republic of Korea)
  39. MES (Latvia)
  40. LAS (Lithuania)
  41. MOE (Malaysia)
  42. UM (Malaysia)
  43. BUAP (Mexico)
  44. CINVESTAV (Mexico)
  45. CONACYT (Mexico)
  46. LNS (Mexico)
  47. SEP (Mexico)
  48. UASLP-FAI (Mexico)
  49. MOS (Montenegro)
  50. MBIE (New Zealand)
  51. PAEC (Pakistan)
  52. MSHE (Poland)
  53. NSC (Poland)
  54. FCT (Portugal)
  55. JINR (Dubna)
  56. MON (Russia)
  57. ROSATOM (Russia)
  58. RAS (Russia)
  59. RFBR (Russia)
  60. NRC KI (Russia)
  61. MESTD (Serbia)
  62. SEIDI (Spain)
  63. CPAN (Spain)
  64. PCTI (Spain)
  65. FEDER (Spain)
  66. MoSTR (Sri Lanka)
  67. Swiss Funding Agencies (Switzerland)
  68. MST (Taipei)
  69. ThEPCenter (Thailand)
  70. IPST (Thailand)
  71. STAR (Thailand)
  72. NSTDA (Thailand)
  73. TUBITAK (Turkey)
  74. TAEK (Turkey)
  75. NASU (Ukraine)
  76. STFC (United Kingdom)
  77. DOE (USA)
  78. NSF (USA)
  79. Marie-Curie pro-gramme
  80. European Research Council and Horizon 2020 Grant [675440, 724704, 752730, 765710]
  81. Leventis Foundation
  82. A.P. Sloan Foundation
  83. Alexander von Humboldt Foundation
  84. Belgian Federal Science Policy Office
  85. Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)
  86. Agentschap voor Innovatie door Wetenschap en Technolo-gie (IWT-Belgium)
  87. F.R.S.-FNRS (Belgium)
  88. FWO (Belgium) under the Excellence of Science - EOS - be.h project [30820817]
  89. Beijing Municipal Science & Technology Commission [Z191100007219010]
  90. Ministry of Education, Youth and Sports (MEYS) of the Czech Republic
  91. Deutsche Forschungsgemein-schaft (DFG) under Germany's Excellence Strategy - EXC 2121 Quantum Universe [390833306]
  92. Lendulet (Momentum) Programme (Hungary)
  93. Janos Bolyai Research Scholarship of the Hun-garian Academy of Sciences (Hungary)
  94. New National Excellence Program uNKP (Hungary)
  95. NKFIA (Hungary) [123842, 123959, 124845, 124850, 125105, 128713, 128786, 129058]
  96. Council of Science and Industrial Research, India
  97. HOMING PLUS pro-gramme of the Foundation for Polish Science (Poland)
  98. European Union (Poland)
  99. Regional Development Fund (Poland)
  100. Mobility Plus pro-gramme of the Ministry of Science and Higher Education (Poland)
  101. National Science Center (Poland) [2014/14/M/ST2/00428, Opus 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, 2015/19/B/ST2/02861, Sonata-bis 2012/07/E/ST2/01406]
  102. National Priorities Research Program by Qatar National Research Fund
  103. Ministry of Science and Higher Education (Russia) [0723-2020-0041]
  104. Tomsk Polytechnic University Com-petitiveness Enhancement Program
  105. Programa Estatal de Fo-mento de la Investigacion Cientifica y Tecnica de Excelencia Maria de Maeztu [MDM-2015-0509]
  106. Programa Severo Ochoa del Principado de Asturias
  107. Thalis programme
  108. Aristeia programme
  109. EU-ESF
  110. Greek NSRF
  111. Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University (Thailand)
  112. Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand)
  113. Kavli Foundation
  114. Nvidia Corporation
  115. SuperMicro Corporation
  116. Welch Foundation [C-1845]
  117. Weston Havens Foundation (USA)

向作者/读者索取更多资源

The paper presents the first measurement of the inclusive cross section for top quark pairs produced in association with two additional charm jets at a center-of-mass energy of 13 TeV. The analysis utilized data from proton-proton collisions recorded by the CMS experiment at the LHC, using a new charm jet identification algorithm and neural network. The results show that the measured cross sections are consistent with predictions from matrix element generators with next-to-leading-order accuracy in quantum chromodynamics.
The first measurement of the inclusive cross section for top quark pairs (tt) produced in association with two additional charm jets is presented. The analysis uses the dileptonic final states of tt events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data correspond to an integrated luminosity of 41.5 fb-1, recorded by the CMS experiment at the LHC. A new charm jet identification algorithm provides input to a neural network that is trained to distinguish among tt events with two additional charm (ttcc), bottom (ttbb), and light-flavour or gluon (ttLL) jets. By means of a template fitting procedure, the inclusive ttcc, ttbb, and ttLL cross sections are simultaneously measured, together with their ratios to the inclusive tt + two jets cross section. This provides measurements of the ttcc and ttbb cross sections of 10.1 +/- 1.2 (stat) +/- 1.4 (syst) pb and 4.54 +/- 0.35 (stat) +/- 0.56 (syst) pb, respectively, in the full phase space. The results are compared and found to be consistent with predictions from two different matrix element generators with next-to-leading order accuracy in quantum chromodynamics, interfaced with a parton shower simulation. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.

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