4.7 Article

Differential cross-section measurements for the electroweak production of dijets in association with a Z boson in proton-proton collisions at ATLAS

Journal

EUROPEAN PHYSICAL JOURNAL C
Volume 81, Issue 2, Pages -

Publisher

SPRINGER
DOI: 10.1140/epjc/s10052-020-08734-w

Keywords

-

Funding

  1. ANPCyT, Argentina
  2. YerPhI, Armenia
  3. ARC, Australia
  4. BMWFW, Austria
  5. FWF, Austria
  6. ANAS, Azerbaijan
  7. SSTC, Belarus
  8. CNPq, Brazil
  9. FAPESP, Brazil
  10. NSERC, Canada
  11. NRC, Canada
  12. CFI, Canada
  13. CERN
  14. CONICYT, Chile
  15. CAS, China
  16. MOST, China
  17. NSFC, China
  18. COLCIENCIAS, Colombia
  19. MSMT CR, Czech Republic
  20. MPO CR, Czech Republic
  21. VSC CR, Czech Republic
  22. DNRF, Denmark
  23. DNSRC, Denmark
  24. IN2P3-CNRS, France
  25. CEA-DRF/IRFU, France
  26. SRNSFG, Georgia
  27. BMBF, Germany
  28. HGF, Germany
  29. MPG, Germany
  30. GSRT, Greece
  31. RGC, China
  32. Hong Kong SAR, China
  33. ISF, Israel
  34. Benoziyo Center, Israel
  35. INFN, Italy
  36. MEXT, Japan
  37. JSPS, Japan
  38. CNRST, Morocco
  39. NWO, Netherlands
  40. RCN, Norway
  41. MNiSW, Poland
  42. NCN, Poland
  43. FCT, Portugal
  44. MNE/IFA, Romania
  45. MES of Russia, Russia Federation
  46. NRC KI, Russia Federation
  47. JINR
  48. MESTD, Serbia
  49. MSSR, Slovakia
  50. ARRS, Slovenia
  51. MIZS, Slovenia
  52. DST/NRF, South Africa
  53. MINECO, Spain
  54. SRC, Sweden
  55. Wallenberg Foundation, Sweden
  56. SERI, Switzerland
  57. SNSF, Switzerland
  58. Canton of Bern, Switzerland
  59. Canton of Geneva, Switzerland
  60. MOST, Taiwan
  61. TAEK, Turkey
  62. STFC, United Kingdom
  63. DOE, United States of America
  64. NSF, United States of America
  65. BCKDF, Canada
  66. CANARIE, Canada
  67. Compute Canada, Canada
  68. CRC, Canada
  69. ERC, European Union
  70. ERDF, European Union
  71. Horizon 2020, European Union
  72. Marie Sklodowska-Curie Actions, European Union
  73. COST, European Union
  74. Investissements d'Avenir Labex, France
  75. Investissements d'Avenir Idex, France
  76. ANR, France
  77. DFG, Germany
  78. AvHFoundation, Germany
  79. Herakleitos programme - EU-ESF
  80. Thales programme - EU-ESF
  81. Aristeia programme - EU-ESF
  82. Greek NSRF, Greece
  83. BSF-NSF, Israel
  84. GIF, Israel
  85. CERCA Programme Generalitat de Catalunya, Spain
  86. PROMETEO Programme Generalitat Valenciana, Spain
  87. Goran Gustafssons Stiftelse, Sweden
  88. The Royal Society, United Kingdom
  89. Leverhulme Trust, United Kingdom
  90. Science and Technology Facilities Council [ST/S000879/1] Funding Source: researchfish
  91. STFC [ST/N000277/1, ST/S000860/1, ST/T007257/1, ST/P002439/1, ST/S00095X/1, ST/N000307/1, ST/J005533/1, ST/J004804/1, ST/S000798/1, ST/L006162/1, ST/S000747/1] Funding Source: UKRI

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Differential cross-section measurements for the electroweak production of two jets in association with a Z boson were presented in this study. The measurements provide a fundamental test of the gauge structure of the Standard Model and are sensitive to the vector-boson fusion production mechanism. Data collected by ATLAS at root s = 13 TeV was used to measure the differential cross-sections in the Z -> l(+)l(-) decay channel as a function of four observables, with results precise enough to distinguish between different theoretical predictions.
Differential cross-sectionmeasurements are presented for the electroweak production of two jets in association with a Z boson. These measurements are sensitive to the vector-boson fusion production mechanism and provide a fundamental test of the gauge structure of the Standard Model. The analysis is performed using proton-proton collision data collected by ATLAS at root s = 13 TeV and with an integrated luminosity of 139 fb(-1). The differential cross-sections are measured in the Z -> l(+)l(-) decay channel (l = e, mu) as a function of four observables: the dijet invariant mass, the rapidity interval spanned by the two jets, the signed azimuthal angle between the two jets, and the transverse momentum of the dilepton pair. The data are corrected for the effects of detector inefficiency and resolution and are sufficiently precise to distinguish between different state-of-the-art theoretical predictions calculated using Powheg+Pythia8, Herwig7+Vbfnlo and Sherpa 2.2. The differential cross-sections are used to search for anomalous weak-boson self-interactions using a dimension-six effective field theory. Themeasurement of the signed azimuthal angle between the two jets is found to be particularly sensitive to the interference between the Standard-Model and dimension-six scattering amplitudes and provides a direct test of charge-conjugation and parity invariance in the weak-boson self-interactions.

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