scholarly journals Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisions

2016 ◽  
Vol 93 (11) ◽  
Author(s):  
T. Aaltonen ◽  
S. Amerio ◽  
D. Amidei ◽  
A. Anastassov ◽  
A. Annovi ◽  
...  
Keyword(s):  
Bottom Quark ◽  
Proton Antiproton ◽  
Quark Pairs ◽  
Low Mass

Low mass Dimuon production at the CERN proton-antiproton collider

1988 ◽  
Vol 209 (2-3) ◽  
pp. 397-406 ◽  
Author(s):  
C. Albajar ◽  
M.G. Albrow ◽  
O.C. Allkofer ◽  
A. Astbury ◽  
B. Aubert ◽  
...  
Keyword(s):  
Proton Antiproton ◽  
Dimuon Production ◽  
Low Mass

scholarly journals Search for low-mass resonances decaying into bottom quark-antiquark pairs in proton-proton collisions at s=13  TeV

2019 ◽  
Vol 99 (1) ◽  
Author(s):  
A. M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
E. Asilar ◽  
...  
Keyword(s):  
Bottom Quark ◽  
Proton Proton ◽  
Proton Collisions ◽  
Low Mass ◽  
Proton Proton Collisions

scholarly journals Measurement of the bottom quark production cross section in proton-antiproton collisions at √s = 0.63 TeV

1988 ◽  
Vol 213 (3) ◽  
pp. 405-412 ◽  
Author(s):  
C. Albajar ◽  
M.G. Albrow ◽  
O.C. Allkofer ◽  
A. Astbury ◽  
B. Aubert ◽  
...  
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Bottom Quark ◽  
Proton Antiproton ◽  
Quark Production

scholarly journals MSSM Higgs boson decays to bottom quark pairs reexamined

2003 ◽  
Vol 68 (11) ◽  
Author(s):  
Jaume Guasch ◽  
Petra Häfliger ◽  
Michael Spira
Keyword(s):  
Higgs Boson ◽  
Bottom Quark ◽  
Quark Pairs

scholarly journals Measurement of the multiplicity of gluons splitting to bottom quark pairs in hadronic Z0 decays

1997 ◽  
Vol 405 (1-2) ◽  
pp. 202-214 ◽  
Author(s):  
P. Abreu ◽  
W. Adam ◽  
T. Adye ◽  
I. Ajinenko ◽  
G.D. Alekseev ◽  
...  
Keyword(s):  
Bottom Quark ◽  
Quark Pairs

scholarly journals Light Higgs searches in $$ t\overline{t}\phi $$ production at the LHC

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Duarte Azevedo ◽  
Rodrigo Capucha ◽  
Emanuel Gouveia ◽  
António Onofre ◽  
Rui Santos
Keyword(s):  
Top Quark ◽  
Mass Range ◽  
Higgs Doublet ◽  
Mass Region ◽  
Reconstruction Method ◽  
Arbitrary Mass ◽  
Quark Pairs ◽  
Yukawa Couplings ◽  
Low Mass ◽  
Mass Reconstruction

Abstract In this paper we propose a new reconstruction method to explore the low mass region in the associated production of top-quark pairs ($$ t\overline{t} $$ t t ¯ ) with a generic scalar boson (ϕ) at the LHC. The new method of mass reconstruction shows an improved resolution of at least a factor of two in the low mass region when compared to previous methods, without the loss of sensitivity of previous analyses. It turns out that it also leads to an improvement of the mass reconstruction of the 125 GeV Higgs for the same production process. We use an effective Lagrangian to describe a scalar with a generic Yukawa coupling to the top quarks. A full phenomenological analysis was performed, using Standard Model background and signal events generated with MadGraph5_aMC@NLO and reconstructed using a kinematic fit. The use of CP-sensitive variables allows then to maximize the distinction between CP-even and CP-odd components of the Yukawa couplings. Confidence Levels (CLs) for the exclusion of ϕ bosons with mixed CP (both CP-even and CP-odd components) were determined as a function of the top Yukawa couplings to the ϕ boson. The mass range analysed starts slightly above the ϒΥ mass up to 40 GeV, although the analysis can be used for an arbitrary mass. If no new light scalar is found, exclusion limits at 95% CL for the absolute value of the CP-even and CP-odd Yukawa are derived. Finally, we analyse how these limits constrain the parameter space of the complex two-Higgs doublet model (C2HDM).

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