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| 22. |
- Aad, G., et al.
(author)
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- 2015
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In: The European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6052. ; 75:7
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Journal article (peer-reviewed)
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| 23. |
- Aad, G., et al.
(author)
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- 2015
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In: The European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6052. ; 75:7
-
Journal article (peer-reviewed)
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| 24. |
- Aad, G., et al.
(author)
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- 2015
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Journal article (peer-reviewed)
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| 25. |
- Aad, G., et al.
(author)
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- 2015
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In: Physical Review C (Nuclear Physics). - 0556-2813 .- 1089-490X. ; 92:3
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Journal article (peer-reviewed)
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| 26. |
- Aad, G., et al.
(author)
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- 2015
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Journal article (peer-reviewed)
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| 27. |
- Aad, G., et al.
(author)
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- 2015
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Journal article (peer-reviewed)
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| 28. |
- Aad, G., et al.
(author)
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- 2015
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In: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 115:9
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Journal article (peer-reviewed)
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| 29. |
- Aad, G., et al.
(author)
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- 2015
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In: Journal of High Energy Physics. - : Springer-Verlag New York. - 1029-8479 .- 1126-6708. ; :9
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Journal article (peer-reviewed)
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| 30. |
- Aad, G., et al.
(author)
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- 2015
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Journal article (peer-reviewed)
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| 31. |
- Aad, G., et al.
(author)
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- 2015
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In: Physical Review D. Particles and fields. - : American Physical Society. - 0556-2821 .- 1089-4918. ; 92:9
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Journal article (peer-reviewed)
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| 32. |
- Aad, G., et al.
(author)
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- 2015
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In: Physical Review D. Particles and fields. - : American Physics Society. - 0556-2821 .- 1089-4918. ; 92:11
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Journal article (peer-reviewed)
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| 33. |
- Aad, G., et al.
(author)
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- 2015
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In: Physical Review D (Particles, Fields, Gravitation and Cosmology). - 1550-2368 .- 1550-7998. ; 92:1
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Journal article (peer-reviewed)
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| 34. |
- Aad, G., et al.
(author)
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- 2015
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In: Journal of High Energy Physics. - : Springer. - 1029-8479 .- 1126-6708. ; :12
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Journal article (peer-reviewed)
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| 35. |
- Aad, G., et al.
(author)
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- 2015
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Journal article (peer-reviewed)
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| 36. |
- Aad, G., et al.
(author)
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- 2015
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In: Journal of High Energy Physics. - : Societa Italiana di Fisica. - 1029-8479 .- 1126-6708. ; :8
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Journal article (peer-reviewed)
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| 37. |
- Aad, G., et al.
(author)
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- 2015
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In: Journal of High Energy Physics. - : Societa Italiana di Fisica. - 1029-8479 .- 1126-6708. ; :9
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Journal article (peer-reviewed)
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| 38. |
- Aad, G., et al.
(author)
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- 2015
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In: Physical Review Letters. - : American Physical Society. - 1079-7114 .- 0031-9007. ; 114:23
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Journal article (peer-reviewed)
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| 39. |
- Aad, G., et al.
(author)
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- 2015
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In: Journal of High Energy Physics. - 1029-8479 .- 1126-6708. ; :8
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Journal article (peer-reviewed)
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| 40. |
- Aad, G., et al.
(author)
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- 2015
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In: Physical Review D (Particles, Fields, Gravitation and Cosmology). - 1550-2368 .- 1550-7998. ; 92:9
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Journal article (peer-reviewed)
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| 41. |
- Aad, G., et al.
(author)
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- 2015
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In: Journal of High Energy Physics. - : Springer. - 1029-8479 .- 1126-6708. ; :11
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Journal article (peer-reviewed)
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| 42. |
- Aad, G., et al.
(author)
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- 2015
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In: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 115:13
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Journal article (peer-reviewed)
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| 43. |
- Aad, G., et al.
(author)
-
- 2015
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In: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 115:3
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Journal article (peer-reviewed)
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| 44. |
- Aad, G., et al.
(author)
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- 2015
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Journal article (peer-reviewed)
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| 45. |
- Aad, G., et al.
(author)
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- 2015
-
Journal article (peer-reviewed)
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| 46. |
- Aad, G., et al.
(author)
-
- 2015
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In: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 115:3
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Journal article (peer-reviewed)
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| 47. |
- Aad, G., et al.
(author)
-
Measurement of exclusive gamma gamma -> l(+)l(-) production in proton-proton collisions at root s=7 TeV with the ATLAS detector
- 2015
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In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 749, s. 242-261
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Journal article (peer-reviewed)abstract
- This Letter reports a measurement of the exclusive gamma gamma -> l(+)l(-) (l = e, mu) cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb(-1). For the electron or muon pairs satisfying exclusive selection criteria, a fit to the dilepton acoplanarity distribution is used to extract the fiducial cross-sections. The cross-section in the electron channel is determined to be sigma(excl)(gamma gamma -> e+e-) = 0.428 +/- 0.035 (stat.) +/- 0.018 (syst.) pbfor a phase-space region with invariant mass of the electron pairs greater than 24GeV, in which both electrons have transverse momentum p(T) > 12 GeV and pseudorapidity vertical bar eta vertical bar < 2.4. For muon pairs with invariant mass greater than 20GeV, muon transverse momentum pT> 10 GeV and pseudorapidity vertical bar eta vertical bar < 2.4, the cross-section is determined to be sigma(excl)(gamma gamma -> mu+mu-) = 0.628 +/- 0.032(stat.) +/- 0.021 (syst.) pb. When proton absorptive effects due to the finite size of the proton are taken into account in the theory calculation, the measured cross-sections are found to be consistent with the theory prediction. (C) 2015 CERN for the benefit of the ATLAS Collaboration. Published by Elsevier B.V.
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| 48. |
- Abulaiti, Yiming, et al.
(author)
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Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at root s=8 TeV with the ATLAS detector
- 2015
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In: Journal of High Energy Physics (JHEP). - : Springer. - 1126-6708 .- 1029-8479. ; :10
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Journal article (peer-reviewed)abstract
- An analysis is presented of events containing jets including at least one b-tagged jet, sizeable missing transverse momentum, and at least two leptons including a pair of the same electric charge, with the scalar sum of the jet and lepton transverse momenta being large. A data sample with an integrated luminosity of 20.3 fb(-1) of pp collisions at root s = 8 TeV recorded by the ATLAS detector at the Large Hadron Collider is used. Standard Model processes rarely produce these final states, but there are several models of physics beyond the Standard Model that predict an enhanced rate of production of such events; the ones considered here are production of vector-like quarks, enhanced fourtop-quark production, pair production of chiral b '-quarks, and production of two positively charged top quarks. Eleven signal regions are defined; subsets of these regions are combined when searching for each class of models. In the three signal regions primarily sensitive to positively charged top quark pair production, the data yield is consistent with the background expectation. There are more data events than expected from background in the set of eight signal regions defined for searching for vector-like quarks and chiral b ' quarks, but the significance of the discrepancy is less than two standard deviations. The discrepancy reaches 2.5 standard deviations in the set of five signal regions defined for searching for four-top-quark production. The results are used to set 95% CL limits on various models.
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| 49. |
- Abulaiti, Yiming, et al.
(author)
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Determination of spin and parity of the Higgs boson in the WW* -> ev mu v decay channel with the ATLAS detector
- 2015
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In: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 75:5
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Journal article (peer-reviewed)abstract
- Studies of the spin and parity quantum numbers of the Higgs boson in the WW* -> ev mu v final state are presented, based on proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 20.3 fb(-1) at a centre-of-mass energy of root s = 8 TeV. The Standard Model spin-parity J(CP) = 0(++) hypothesis is compared with alternative hypotheses for both spin andCP. The case where the observed resonance is a mixture of the Standard-Model-like Higgs boson and CP-even (J(CP) = 0(++)) or CP-odd (J(CP) = 0(+-)) Higgs boson in scenarios beyond the Standard Model is also studied. The data are found to be consistent with the Standard Model prediction and limits are placed on alternative spin and CP hypotheses, including CP mixing in different scenarios.
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| 50. |
- Abulaiti, Yiming, et al.
(author)
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Measurement of the top quark mass in the t(t)over-bar -> lepton plus jets and t(t)over-bar -> dilepton channels using root s=7 TeV ATLAS data
- 2015
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In: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 75:7
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Journal article (peer-reviewed)abstract
- The top quark mass was measured in the channels t (t) over bar -> lepton+jets and t (t) over bar -> dilepton (lepton = e, mu) based on ATLAS data recorded in 2011. The data were taken at the LHC with a proton-proton centre-of-mass energy of root s = 7 TeV and correspond to an integrated luminosity of 4.6 fb(-1). The t (t) over bar -> lepton+jets analysis uses a three-dimensional template technique which determines the top quark mass together with a global jet energy scale factor (JSF), and a relative b-to-light-jet energy scale factor (bJSF), where the terms b-jets and light-jets refer to jets originating from b-quarks and u,d,c, s-quarks or gluons, respectively. The analysis of the t (t) over bar -> dilepton channel exploits a one-dimensional template method using the m(lb) observable, defined as the average invariant mass of the two lepton+b-jet pairs in each event. The top quark mass is measured to be 172.33 +/- 0.75(stat + JSF + bJSF) +/- 1.02(syst) GeV, and 173.79 +/- 0.54(stat) +/- 1.30(syst) GeV in the t (t) over bar -> lepton+jets and t (t) over bar -> dilepton channels, respectively. The combination of the two results yields m(top) = 172.99 +/- 0.48(stat) +/- 0.78(syst) GeV, with a total uncertainty of 0.91 GeV.
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