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Measurement of top quark polarisation in t-channel single top quark production

Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Eroe, J.; Flechl, M.; Friedl, M.; Fruehwirth, R.; Ghete, V. M.; Hartl, C.; Hoermann, N.; Hrubec, J.; Jeitler, M.; Knuenz, V.; Koenig, A.; Koenig, A.


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    "creators": [
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        "affiliation": "Yerevan Phys Inst, Yerevan 375036, Armenia", 
        "name": "Khachatryan, V."
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      {
        "affiliation": "Yerevan Phys Inst, Yerevan 375036, Armenia", 
        "name": "Sirunyan, A. M."
      }, 
      {
        "affiliation": "Yerevan Phys Inst, Yerevan 375036, Armenia", 
        "name": "Tumasyan, A."
      }, 
      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Adam, W."
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      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Asilar, E."
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        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Bergauer, T."
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      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Brandstetter, J."
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        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Brondolin, E."
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        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Dragicevic, M."
      }, 
      {
        "name": "Eroe, J."
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      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Flechl, M."
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      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Friedl, M."
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      {
        "name": "Fruehwirth, R."
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        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Ghete, V. M."
      }, 
      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Hartl, C."
      }, 
      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Hoermann, N."
      }, 
      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Hrubec, J."
      }, 
      {
        "name": "Jeitler, M."
      }, 
      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Knuenz, V."
      }, 
      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Koenig, A."
      }, 
      {
        "affiliation": "OeAW, Inst Hochenergiephys, Vienna, Austria", 
        "name": "Koenig, A."
      }
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    "description": "A first measurement of the top quark spin asymmetry, sensitive to the top quark polarisation, in t-channel single top quark production is presented. It is based on a sample of pp collisions at a centre-of-mass energy of 8TeV corresponding to an integrated luminosity of 19.7 fb(-1). A high-purity sample of t-channel single top quark events with an isolated muon is selected. Signal and background components are estimated using a fit to data. A differential cross section measurement, corrected for detector effects, of an angular observable sensitive to the top quark polarisation is performed. The differential distribution is used to extract a top quark spin asymmetry of 0.26 +/- 0.03(stat) +/- 0.10(syst), which is compatible with a p-value of 4.6% with the standard model prediction of 0.44.", 
    "doi": "10.1007/JHEP04(2016)073", 
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    "journal": {
      "issue": "4", 
      "title": "JOURNAL OF HIGH ENERGY PHYSICS"
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    "publication_date": "2016-01-01", 
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