4.8 Article

Search for Down-Type Fourth Generation Quarks with the ATLAS Detector in Events with One Lepton and Hadronically Decaying W Bosons

Journal

PHYSICAL REVIEW LETTERS
Volume 109, Issue 3, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.032001

Keywords

-

Funding

  1. ANPCyT, Argentina
  2. YerPhI, Armenia
  3. ARC, Australia
  4. BMWF, Austria
  5. ANAS, Azerbaijan
  6. SSTC, Belarus
  7. CNPq, Brazil
  8. FAPESP, Brazil
  9. NSERC, Canada
  10. NRC, Canada
  11. CFI, Canada
  12. CERN
  13. CONICYT, Chile
  14. CAS, China
  15. MOST, China
  16. NSFC, China
  17. COLCIENCIAS, Colombia
  18. MSMT CR, Czech Republic
  19. MPO CR, Czech Republic
  20. VSC CR, Czech Republic
  21. DNRF, Denmark
  22. DNSRC, Denmark
  23. Lundbeck Foundation, Denmark
  24. EPLANET
  25. ERC, European Union
  26. IN2P3-CNRS, France
  27. CEA-DSM/IRFU, France
  28. GNAS, Georgia
  29. BMBF, Germany
  30. DFG, Germany
  31. HGF, Germany
  32. MPG, Germany
  33. AvH Foundation, Germany
  34. GSRT, Greece
  35. ISF, Israel
  36. MINERVA, Israel
  37. GIF, Israel
  38. DIP, Israel
  39. Benoziyo Center, Israel
  40. INFN, Italy
  41. MEXT, Japan
  42. JSPS, Japan
  43. CNRST, Morocco
  44. FOM, Netherlands
  45. NWO, Netherlands
  46. RCN, Norway
  47. MNiSW, Poland
  48. GRICES, Portugal
  49. FCT, Portugal
  50. MERYS (MECTS), Romania
  51. MES of Russia
  52. ROSATOM, Russian Federation
  53. JINR
  54. MSTD, Serbia
  55. MSSR, Slovakia
  56. ARRS, Slovenia
  57. MVZT, Slovenia
  58. DST/NRF, South Africa
  59. MICINN, Spain
  60. SRC, Sweden
  61. Wallenberg Foundation, Sweden
  62. SER, Switzerland
  63. SNSF, Switzerland
  64. Cantons of Bern and Geneva, Switzerland
  65. NSC, Taiwan
  66. TAEK, Turkey
  67. STFC, United Kingdom
  68. Royal Society, United Kingdom
  69. Leverhulme Trust, United Kingdom
  70. DOE, United States of America
  71. NSF, United States of America
  72. ICREA Funding Source: Custom
  73. STFC [ST/L001195/1, ST/H001093/1, PP/E000355/1, ST/J004928/1, ST/G502320/1, ST/I006080/1, ST/H001026/1, ST/I003142/1, ST/M000753/1, ST/K000705/1, ST/F007337/1, ST/J004944/1, PP/E003699/2, ST/J005576/1, ST/H001069/2, ST/K001361/1, ST/I003525/1, ST/I005803/1, PP/E003087/1, ST/I000186/1, ST/J002798/1, ST/K001329/1, ST/M001431/1, ST/H001093/2, ST/K001248/1, ST/K00073X/1, ST/M001512/1, PP/E003699/1, ST/H001026/2, ST/K001337/1, PP/E000347/1, ST/H00100X/2, ST/I003517/1, ST/L001144/1, ST/H00100X/1] Funding Source: UKRI
  74. Science and Technology Facilities Council [ST/K001310/1 LHCb Upgrades, ST/J005576/1, ST/K000705/1, PP/E003699/1, ST/G502320/1, ST/H001093/2, ST/J004944/1, ST/K001418/1, ATLAS, ST/K001310/1 LHCb, ST/J004928/1 ATLAS Upgrade, ST/K001361/1 LHCb, ST/H00100X/1, ST/J002798/1, ST/K001248/1 ATLAS, PP/E000355/1, ST/K001361/1 ATLAS Upgrades, ST/F007337/1, ST/K001310/1 ATLAS Upgrades, ST/K00073X/1, GRIDPP, PP/E003699/2, ST/K001310/1, ST/L001144/1, ST/H00100X/2, ST/I003517/1, PP/E003087/1, ST/J004928/1, ST/I006080/1, ST/K001337/1 ATLAS, ST/I000186/1, PP/E000347/1, ST/K001361/1 LHCb Upgrades, ST/H001093/1, ST/K001361/1, ST/M001431/1, ST/M001512/1, ST/H001026/1, ST/H001069/2, ST/K001361/1 MINOS/MINOS+, ST/K001310/1 ATLAS, ST/H001026/2, ST/I005803/1, ST/M001474/1, ST/I003142/1, ST/K001329/1 ATLAS, ST/I003525/1, ST/L001195/1, ST/K001361/1 ATLAS, ST/K001248/1, ST/I005803/1 GRIDPP, ST/K001264/1 ATLAS, ST/K001337/1] Funding Source: researchfish

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This Letter presents a search for pair production of heavy down-type quarks decaying via b' -> Wt in the lepton + jets channel, as b'(b) over bar' -> W(-)tW(+)(t) over bar -> b (b) over barW(+)W(-)W(+)W- -> l(+/-) nu b (b) over barq (q) over barq (q) over barq ($) over barq. In addition to requiring exactly one lepton, large missing transverse momentum, and at least six jets, the invariant mass of nearby jet pairs is used to identify high transverse momentum W bosons. In data corresponding to an integrated luminosity of 1.04 fb(-1) from pp collisions at root s = 7 TeV recorded with the ATLAS detector, a heavy down-type quark with mass less than 480 GeV can be excluded at the 95% confidence level.

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