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http://acervodigital.unesp.br/handle/11449/23601- Title:
- Measurement of the top quark mass in the lepton plus jets channel using the ideogram method
- Abazov, V. M.
- Abbott, B.
- Abolins, M.
- Acharya, B. S.
- Adams, M.
- Adams, T.
- Aguilo, E.
- Ahn, S. H.
- Ahsan, M.
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- Konrath, J.-P.
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- Krop, D.
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- Kumar, A.
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- Lam, D.
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- Landsberg, G.
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- Lee, W. M.
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- Lehner, F.
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- Leveque, J.
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- Li, L.
- Li, Q. Z.
- Lietti, S. M.
- Lima, J. G. R.
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- Lobo, L.
- Lobodenko, A.
- Lokajicek, M.
- Lounis, A.
- Love, P.
- Lubatti, H. J.
- Lynker, M.
- Lyon, A. L.
- Maciel, A. K. A.
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- Maettig, P.
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- Makovec, N.
- Mal, P. K.
- Malbouisson, H. B.
- Malik, S.
- Malyshev, V. L.
- Mao, H. S.
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- Martin, B.
- McCarthy, R.
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- Mercadante, P. G.
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- Meyer, J.
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- 1550-7998
- A measurement of the top quark mass using events with one charged lepton, missing transverse energy, and jets in the final state, collected by the D0 detector from p (p) over bar collisions at root s=1.96 TeV at the Fermilab Tevatron collider, is presented. A constrained fit is used to fully reconstruct the kinematics of the events. For every event a top quark mass likelihood is calculated taking into account all possible jet assignments and the probability that an event is signal or background. Lifetime-based identification of b jets is employed to enhance the separation between t (t) over bar signal and background from other physics processes and to improve the assignment of the observed jets to the quarks in the t (1) over bar hypothesis. We extract a multiplicative jet energy scale (JES) factor in situ, greatly reducing the systematic effect related to the jet energy measurement. In a data sample with an integrated luminosity of 425 pb(-1), we observe 230 candidate events, with an estimated background of 123 events, and measure m(t)=173.7 +/- 4.4(stat+JES)(-2.0)(+2.1)(syst) GeV. This result represents the first application of the ideogram technique to the measurement of the top quark mass in lepton+jets events.
- 1-May-2007
- Physical Review D. College Pk: American Physical Soc, v. 75, n. 9, 21 p., 2007.
- 21
- American Physical Soc
- http://dx.doi.org/10.1103/PhysRevD.75.092001
- http://hdl.handle.net/11449/23601
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/23601
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