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dc.date.accessioned | 2018-11-28T17:42:17Z | |
dc.date.available | 2018-11-28T17:42:17Z | |
dc.date.created | 2018-11-28T17:42:17Z | |
dc.date.issued | 2017-08-22 | |
dc.identifier | Physical Review D. College Pk: Amer Physical Soc, v. 96, n. 3, 31 p., 2017. | |
dc.identifier | 2470-0010 | |
dc.identifier | http://hdl.handle.net/11449/165709 | |
dc.identifier | 10.1103/PhysRevD.96.032002 | |
dc.identifier | WOS:000408116900001 | |
dc.identifier | WOS000408116900001.pdf | |
dc.description.abstract | A measurement of the top quark mass (M-t) in the dileptonic t (t) over bar decay channel is performed using data from proton-proton collisions at a center-of-mass energy of 8 TeV. The data was recorded by the CMS experiment at the LHC and corresponds to an integrated luminosity of 19.7 +/- 0.5 fb(-1). Events are selected with two oppositely charged leptons (l = e, mu) and two jets identified as originating from b quarks. The analysis is based on three kinematic observables whose distributions are sensitive to the value of Mt. An invariant mass observable, M-bl, and a stransverse mass observable, M-T2, are employed in a simultaneous fit to determine the value of M-t and an overall jet energy scale factor (JSF). A complementary approach is used to construct an invariant mass observable, M-blv, that is combined with M-T2 to measure M-t. The shapes of the observables, along with their evolutions in M-t and JSF, are modeled by a nonparametric Gaussian process regression technique. The sensitivity of the observables to the value of M-t is investigated using a Fisher information density method. The top quark mass is measured to be 172.22 +/- 0.18(stat)(-0.93)(+0.89) (syst) GeV. | |
dc.language | eng | |
dc.publisher | Amer Physical Soc | |
dc.relation | Physical Review D | |
dc.relation | 1,801 | |
dc.rights | Acesso aberto | |
dc.source | Web of Science | |
dc.title | Measurement of the top quark mass in the dileptonic t(t)over-bar decay channel using the mass observables M-bl, M-T2, and M-blv in pp collisions at root=8 TeV | |
dc.type | Artículos de revistas | |