scholarly journals Measurement of the partial width of the decay of the Z0 into charm quark pairs

1990 ◽  
Vol 252 (1) ◽  
pp. 140-148 ◽  
Author(s):  
P. Abreu ◽  
W. Adam ◽  
F. Adami ◽  
T. Adye ◽  
G.D. Alekseev ◽  
...  
Keyword(s):  
Charm Quark ◽  
Partial Width ◽  
Quark Pairs

scholarly journals Measurement of the multiplicity of charm quark pairs from gluons in hadronic Z0 Decays

1995 ◽  
Vol 353 (4) ◽  
pp. 595-605 ◽  
Author(s):  
R. Akers ◽  
G. Alexander ◽  
J. Allison ◽  
N. Altekamp ◽  
K. Ametewee ◽  
...  
Keyword(s):  
Charm Quark ◽  
Quark Pairs

scholarly journals Class imbalance techniques for high energy physics

2019 ◽  
Vol 7 (6) ◽  
Author(s):  
Christopher W. Murphy
Keyword(s):  
High Energy Physics ◽  
Charm Quark ◽  
Class Imbalance ◽  
High Energy ◽  
Longitudinal Polarization ◽  
Class Versus ◽  
Quark Pairs ◽  
Physics Experiment ◽  
Polarization Fraction ◽  
Energy Physics

A common problem in a high energy physics experiment is extracting a signal from a much larger background. Posed as a classification task, there is said to be an imbalance in the number of samples belonging to the signal class versus the number of samples from the background class. In this work we provide a brief overview of class imbalance techniques in a high energy physics setting. Two case studies are presented: (1) the measurement of the longitudinal polarization fraction in same-sign WW scattering, and (2) the decay of the Higgs boson to charm-quark pairs.

scholarly journals Invariant-mass distribution of top-quark pairs and top-quark mass determination

2020 ◽  
Vol 44 (9) ◽  
pp. 091001
Author(s):  
Wan-Li Ju ◽  
Guoxing Wang ◽  
Xing Wang ◽  
Xiaofeng Xu ◽  
Yongqi Xu ◽  
...  
Keyword(s):  
Invariant Mass ◽  
Mass Distribution ◽  
Top Quark ◽  
Quark Mass ◽  
Invariant Mass Distribution ◽  
Mass Determination ◽  
Top Quark Mass ◽  
Quark Pairs ◽  
Top Quark Pairs

scholarly journals Electric dipole moment constraints on CP-violating heavy-quark Yukawas at next-to-leading order

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Joachim Brod ◽  
Emmanuel Stamou
Keyword(s):  
Electric Dipole ◽  
Anomalous Dimension ◽  
Phenomenological Study ◽  
Dipole Moments ◽  
Charm Quark ◽  
Leading Order ◽  
Logarithmic Order ◽  
Electric Dipole Moments ◽  
Yukawa Couplings ◽  
Experimental Bound

Abstract Electric dipole moments are sensitive probes of new phases in the Higgs Yukawa couplings. We calculate the complete two-loop QCD anomalous dimension matrix for the mixing of CP-odd scalar and tensor operators and apply our results for a phenomenological study of CP violation in the bottom and charm Yukawa couplings. We find large shifts of the induced Wilson coefficients at next-to-leading-logarithmic order. Using the experimental bound on the electric dipole moments of the neutron and mercury, we update the constraints on CP-violating phases in the bottom and charm quark Yukawas.

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