Article open access publication

Search for a heavy Higgs boson decaying into a Z boson and another heavy Higgs boson in the ℓℓbb final state in pp collisions at s = 13 TeV with the ATLAS detector

Physics Letters B, Elsevier, ISSN 1873-2445

Volume 783, 2018

DOI:10.1016/j.physletb.2018.07.006, Dimensions: pub.1105449550,

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  1. (1) Mohamed I University, grid.410890.4
  2. (2) Center for Particle Physics of Marseilles, grid.470046.1
  3. (3) University of Oklahoma, grid.266900.b
  4. (4) Institute of Physics, grid.435347.2
  5. (5) Laboratoire de l'Accélérateur Linéaire, grid.462450.1
  6. (6) University of Toronto, grid.17063.33
  7. (7) University of California, Santa Cruz, grid.205975.c
  8. (8) University of Sussex, grid.12082.39
  9. (9) Tel Aviv University, grid.12136.37
  10. (10) Technion – Israel Institute of Technology, grid.6451.6
  11. (11) Argonne National Laboratory, grid.187073.a
  12. (12) International Centre for Theoretical Physics, grid.419330.c
  13. (13) INFN Sezione di Trieste, grid.470223.0
  14. (14) University of Tokyo, grid.26999.3d
  15. (15) AGH University of Science and Technology, grid.9922.0
  16. (16) Northern Illinois University, grid.261128.e
  17. (17) Ludwig Maximilian University of Munich, grid.5252.0
  18. (18) Rutherford Appleton Laboratory, grid.76978.37
  19. (19) Alexandru Ioan Cuza University, grid.8168.7
  20. (20) Departamento de Fisica Teorica y del Cosmos, Universidad de Granada, Granada (Spain), Portugal
  21. (21) Laboratory of Instrumentation and Experimental Particles Physics, grid.420929.4
  22. (22) Joint Institute for Nuclear Research, grid.33762.33
  23. (23) INFN Sezione di Roma II, grid.470219.9
  24. (24) University of Rome Tor Vergata, grid.6530.0
  25. (25) Kyoto University, grid.258799.8
  26. (26) Lund University, grid.4514.4
  27. (27) University of Geneva, grid.8591.5
  28. (28) P.N. Lebedev Physical Institute of the Russian Academy of Sciences, grid.425806.d
  29. (29) INFN Sezione di Bologna, grid.470193.8
  30. (30) University of Bologna, grid.6292.f
  31. (31) University of Victoria, grid.143640.4
  32. (32) National Laboratory of Frascati, grid.463190.9
  33. (33) Instituto de Física La Plata, grid.450288.3
  34. (34) Radboud University Nijmegen, grid.5590.9
  35. (35) European Organization for Nuclear Research, grid.9132.9
  36. (36) Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, grid.443874.8
  37. (37) National Technical University of Athens, grid.4241.3
  38. (38) Czech Technical University in Prague, grid.6652.7
  39. (39) INFN Sezione di Lecce, grid.470680.d
  40. (40) University of Salento, grid.9906.6
  41. (41) INFN Sezione di Milano, grid.470206.7
  42. (42) Enrico Fermi Institute, University of Chicago, Chicago IL, United States of America
  43. (43) Department of Physics, University of Washington, Seattle WA, United States of America
  44. (44) University of Oregon, grid.170202.6
  45. (45) University of Birmingham, grid.6572.6
  46. (46) INFN Sezione di Napoli, grid.470211.1
  47. (47) University of Naples Federico II, grid.4691.a
  48. (48) University of Copenhagen, grid.5254.6, KU
  49. (49) University of Glasgow, grid.8756.c
  50. (50) Institute for Corpuscular Physics, grid.470047.0
  51. (51) Lawrence Berkeley National Laboratory, grid.184769.5
  52. (52) Federal University of Rio de Janeiro, grid.8536.8
  53. (53) University of Oxford, grid.4991.5
  54. (54) Brandeis University, grid.253264.4
  55. (55) University of Michigan, grid.214458.e
  56. (56) University of Coimbra, grid.8051.c
  57. (57) University of Sheffield, grid.11835.3e
  58. (58) The University of Texas at Austin, grid.89336.37
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  61. (61) University of Milan, grid.4708.b
  62. (62) University of Clermont Auvergne, grid.494717.8
  63. (63) National Institute for Subatomic Physics, grid.420012.5
  64. (64) Columbia University, grid.21729.3f
  65. (65) Budker Institute of Nuclear Physics, grid.418495.5
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  67. (67) INFN Sezione di Pisa, grid.470216.6
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  85. (85) University of Cape Town, grid.7836.a
  86. (86) Department of Physics, University of Illinois, Urbana IL, United States of America
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  88. (88) University of Science and Technology of China, grid.59053.3a
  89. (89) Institute of High Energy Physics, grid.418741.f
  90. (90) Institut de Recherches sur les Lois Fondamentales de l'Univers, DSM/IRFU, CEA Saclay, Gif-sur-Yvette, France
  91. (91) Sapienza University of Rome, grid.7841.a
  92. (92) Institute of Nuclear Physics Polish Academy of Sciences, grid.418860.3
  93. (93) Simon Fraser University, grid.61971.38
  94. (94) Yale University, grid.47100.32
  95. (95) Louisiana Tech University, grid.259237.8
  96. (96) Weizmann Institute of Science, grid.13992.30
  97. (97) Department of Physics, University of Pennsylvania, Philadelphia PA, United States of America
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  99. (99) University of Wuppertal, grid.7787.f
  100. (100) University of Melbourne, grid.1008.9
  101. (101) INFN Sezione di Genova, grid.470205.4
  102. (102) University of Genoa, grid.5606.5
  103. (103) Max Planck Institute for Physics, grid.435824.c
  104. (104) SLAC National Accelerator Laboratory, grid.445003.6
  105. (105) School of Physics and Astronomy, Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education, Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, China
  106. (106) INFN Sezione di Roma III, grid.470220.3
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  110. (110) Mohammed V University, grid.31143.34
  111. (111) The Ohio State University, grid.261331.4
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  117. (117) Gaziantep University, grid.411549.c
  118. (118) Bahçeşehir University, grid.10359.3e
  119. (119) Stony Brook University, grid.36425.36
  120. (120) University College London, grid.83440.3b
  121. (121) Department of Physics, Carleton University, Ottawa ON, Canada
  122. (122) Moscow Engineering Physics Institute, grid.183446.c
  123. (123) University of Hassan II Casablanca, grid.412148.a
  124. (124) LAPP, Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, Annecy, France
  125. (125) Laboratory of Subatomic Physics and Cosmology, grid.472561.3
  126. (126) Department of Physics, University of Massachusetts, Amherst MA, United States of America
  127. (127) Stockholm University, grid.10548.38
  128. (128) University of Manchester, grid.5379.8
  129. (129) University of Pittsburgh, grid.21925.3d
  130. (130) Humboldt University of Berlin, grid.7468.d
  131. (131) University of Pisa, grid.5395.a
  132. (132) TU Dresden, grid.4488.0
  133. (133) Boston University, grid.189504.1
  134. (134) Pontifical Catholic University of Chile, grid.7870.8
  135. (135) Lomonosov Moscow State University, grid.14476.30
  136. (136) Institute for High Energy Physics, grid.424823.b
  137. (137) Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Barcelona, Spain
  138. (138) University of Buenos Aires, grid.7345.5
  139. (139) The University of Texas at Arlington, grid.267315.4
  140. (140) Tokyo Metropolitan University, grid.265074.2
  141. (141) University of Edinburgh, grid.4305.2
  142. (142) Federico Santa María Technical University, grid.12148.3e
  143. (143) Institute of Experimental Physics, grid.435184.f
  144. (144) University of Bergen, grid.7914.b
  145. (145) University of Oslo, grid.5510.1
  146. (146) University of Liverpool, grid.10025.36
  147. (147) TU Dortmund University, grid.5675.1
  148. (148) Institute of Physics, Academia Sinica, grid.482252.b
  149. (149) University at Albany, State University of New York, grid.265850.c
  150. (150) Ankara University, grid.7256.6
  151. (151) Department of Physics, Indiana University, Bloomington IN, United States of America
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  153. (153) Oklahoma State University, grid.65519.3e
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  155. (155) University of Johannesburg, grid.412988.e
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  157. (157) Istanbul Bilgi University, grid.24956.3c
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  159. (159) Universidade Federal de Juiz de Fora, grid.411198.4
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  170. (170) Aristotle University of Thessaloniki, grid.4793.9
  171. (171) Institute of Physics, grid.424881.3
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  180. (180) Tbilisi State University, grid.26193.3f
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  183. (183) University of Giessen, grid.8664.c
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  206. (206) INFN-TIFPA, Italy
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  214. (214) University of Belgrade, grid.7149.b
  215. (215) Istanbul Aydın University, grid.449300.a
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Description

A search for a heavy neutral Higgs boson, A, decaying into a Z boson and another heavy Higgs boson, H, is performed using a data sample corresponding to an integrated luminosity of 36.1 fb−1 from proton–proton collisions at s = 13 TeV recorded in 2015 and 2016 by the ATLAS detector at the Large Hadron Collider. The search considers the Z boson decaying to electrons or muons and the H boson into a pair of b-quarks. No evidence for the production of an A boson is found. Considering each production process separately, the 95% confidence-level upper limits on the p p → A → Z H production cross-section times the branching ratio H → b b are in the range of 14–830 fb for the gluon–gluon fusion process and 26–570 fb for the b-associated process for the mass ranges 130–700 GeV of the H boson and 230–800 GeV of the A boson. The results are interpreted in the context of two-Higgs-doublet models.

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