First observation of top quark production in the forward region.
نویسندگان
- R Aaij
- B Adeva
- M Adinolfi
- A Affolder
- Z Ajaltouni
- S Akar
- J Albrecht
- F Alessio
- M Alexander
- S Ali
- G Alkhazov
- P Alvarez Cartelle
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- S Amato
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- Y Amhis
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- J Anderson
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- O Aquines Gutierrez
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- A Artamonov
- M Artuso
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- J J Back
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- C Barschel
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- J Beddow
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- I Belyaev
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- J Benton
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- A Bertolin
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چکیده
Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with W→μν is reconstructed using muons with a transverse momentum, p_{T}, larger than 25 GeV in the pseudorapidity range 2.0<η<4.5. The b jets are required to have 5020 GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0 fb^{-1} collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are σ(top)[7 TeV]=239±53(stat)±33(syst)±24(theory) fb,σ(top)[8 TeV]=289±43(stat)±40(syst)±29(theory) fb.These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.
منابع مشابه
First Observation of Top Quark Production in the Forward Region
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عنوان ژورنال:
- Physical review letters
دوره 115 11 شماره
صفحات -
تاریخ انتشار 2015