Angular distributions in t(t)over-barH(H → b(b)over-bar) reconstructed events at the LHC

被引：21

作者：

Amor dos Santos, S. P. ^{[1
]}

Araque, J. P. ^{[2
]}

Cantrill, R. ^{[3
]}

Castro, N. F. ^{[2
,9
]}

Fiolhais, M. C. N. ^{[1
,4
]}

Frederix, R. ^{[5
]}

Goncalo, R. ^{[3
]}

Martins, R. ^{[2
]}

Santos, R. ^{[7
,8
]}

Silva, J. ^{[6
]}

Onofre, A. ^{[2
]}

Peixoto, H. ^{[6
]}

Reigoto, A. ^{[2
]}

机构：

[1] Univ Coimbra, Dept Fis, LIP, P-3004516 Coimbra, Portugal

[2] Univ Minho, Dept Fis, LIP, P-4710057 Braga, Portugal

[3] LIP, P-1000149 Lisbon, Portugal

[4] CUNY City Coll, Dept Phys, New York, NY 10031 USA

[5] CERN, TH Unit, PH Dept, CH-1211 Geneva 23, Switzerland

[6] Univ Minho, Ctr Fis, P-4710057 Braga, Portugal

[7] ISEL, P-1959007 Lisbon, Portugal

[8] Univ Lisbon, Fac Ciencias, Ctr Fis Teor & Computac, P-1749016 Lisbon, Portugal

[9] Univ Porto, Fac Ciencias, Dept Fis & Astron, P-4169007 Oporto, Portugal

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 03期

关键词：

HIGGS-BOSON PRODUCTION; TOP-QUARK; BROKEN SYMMETRIES; ASSOCIATION; NLO; COUPLINGS; SEARCH; MASS; PAIR;

D O I：

10.1103/PhysRevD.92.034021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The associated production of a Higgs boson and a top-quark pair, t (t) over barH, in proton-proton collisions is addressed in this paper for a center of mass energy of 13 TeV at the LHC. Dileptonic final states of t (t) over barH events with two oppositely charged leptons and four jets from the decays t -> bW(+) -> bl(+)v(l), (t) over bar -> (b) over barW(-) -> (b) over barl(-)(v) over bar (l) and h -> b (b) over bar are used. Signal events, generated with MadGraph5_aMC@NLO, are fully reconstructed by applying a kinematic fit. New angular distributions of the decay products as well as angular asymmetries are explored in order to improve discrimination of t (t) over barH signal events over the dominant irreducible background contribution, t (t) over barb (b) over bar. Even after the full kinematic fit reconstruction of the events, the proposed angular distributions and asymmetries are still quite different in the t (t) over barH signal and the dominant background (t (t) over barb (b) over bar).

引用

页数：10

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