scholarly journals Search for Pair Production of Supersymmetric Top Quarks in Dilepton Events frompp¯Collisions ats=1.96  TeV

2010 ◽  
Vol 104 (25) ◽  
Author(s):  
T. Aaltonen ◽  
J. Adelman ◽  
T. Akimoto ◽  
B. Álvarez González ◽  
S. Amerio ◽  
...  
Keyword(s):  
Pair Production ◽  
Top Quarks ◽  
Dilepton Events

scholarly journals Search for pair production of excited top quarks in the lepton + jets final state

2018 ◽  
Vol 778 ◽  
pp. 349-370 ◽  
Author(s):  
A.M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
E. Asilar ◽  
...  
Keyword(s):  
Pair Production ◽  
Top Quarks ◽  
Final State ◽  
Lepton Jets

scholarly journals Search for Pair Production of Light Scalar Top Quarks inpp¯Collisions ats=1.8  TeV

2004 ◽  
Vol 93 (1) ◽  
Author(s):  
V. M. Abazov ◽  
B. Abbott ◽  
A. Abdesselam ◽  
M. Abolins ◽  
V. Abramov ◽  
...  
Keyword(s):  
Pair Production ◽  
Top Quarks ◽  
Light Scalar ◽  
Scalar Top ◽  
Scalar Top Quarks

scholarly journals Photon radiation effects in kinematic reconstruction of top quarks

2021 ◽  
Vol 16 (12) ◽  
pp. P12001
Author(s):  
D. Dobur ◽  
J. Knolle ◽  
G. Mestdach ◽  
K. Skovpen
Keyword(s):  
Pair Production ◽  
Top Quark ◽  
Radiation Effects ◽  
Top Quarks ◽  
Photon Radiation ◽  
Systematic Effects ◽  
Background Events

Abstract Kinematic reconstruction of top quarks allows to define a set of kinematic observables relevant to various physics processes that involve top quarks and provides an additional handle for the suppression of background events. Radiation of photons in association with the top quarks alters the kinematics and the topology of the event, leading to visible systematic effects in measurable observables. The present study introduces an improved reconstruction of the top quark kinematics in the presence of photon radiation. The results are presented for processes with top quark pair production, as well as for singly-produced top quarks.

scholarly journals Search for Pair Production of Scalar Top Quarks inR-Parity Violating Decay Modes inpp¯Collisions ats=1.8  TeV

2004 ◽  
Vol 92 (5) ◽  
Author(s):  
D. Acosta ◽  
T. Affolder ◽  
H. Akimoto ◽  
M. G. Albrow ◽  
D. Ambrose ◽  
...  
Keyword(s):  
Pair Production ◽  
Top Quarks ◽  
Decay Modes ◽  
Scalar Top ◽  
Scalar Top Quarks

scholarly journals Search for Pair Production of Scalar Top Quarks Decaying to aτLepton and abQuark inpp¯Collisions ats=1.96  TeV

2008 ◽  
Vol 101 (7) ◽  
Author(s):  
T. Aaltonen ◽  
J. Adelman ◽  
T. Akimoto ◽  
M. G. Albrow ◽  
B. Álvarez González ◽  
...  
Keyword(s):  
Pair Production ◽  
Top Quarks ◽  
Scalar Top ◽  
Scalar Top Quarks

scholarly journals Analysis of Top Quark Pair Production Signal from Neutral 2HDM Higgs Bosons at LHC

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Majid Hashemi ◽  
Mahbobeh Jafarpour
Keyword(s):  
Higgs Boson ◽  
Pair Production ◽  
Top Quark ◽  
Top Quarks ◽  
Higgs Doublet ◽  
Higgs Bosons ◽  
Type I ◽  
Final State ◽  
Doublet Model ◽  
Two Higgs Doublet Model

In this paper, the top quark pair production events are analyzed as a source of neutral Higgs bosons of the two Higgs doublet model type I at LHC. The production mechanism is pp→H/A→tt¯ assuming a fully hadronic final state through t→Wb→jjb. In order to distinguish the signal from the main background which is the standard model tt¯, we benefit from the fact that the top quarks in signal events acquire large Lorentz boost due to the heavy neutral Higgs boson. This feature leads to three collinear jets (a fat jet) which is a discriminating tool for identification of the top quarks from the Higgs boson resonances. Events with two identified top jets are selected and the invariant mass of the top pair is calculated for both signal and background. It is shown that the low tan β region has still some parts which can be covered by this analysis and has not yet been excluded by flavor physics data.

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