Results 1 to 10 of about 82,873 (124)

Intrinsic bottom and its impact on heavy new physics at the LHC

open access: yesEPJ Web of Conferences, 2016
Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most analyses rely on the assumption that the charm and bottom PDFs are generated perturbatively by gluon splitting and do not ...
Lyonnet Florian
doaj   +3 more sources

Z boson production in bottom-quark fusion: a study of b-mass effects beyond leading order [PDF]

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
We compute the total cross-section for Z boson production in bottom-quark fusion, applying to this case the method we previously used for Higgs production in bottom fusion.
Stefano Forte   +2 more
doaj   +2 more sources

Differential decay rates of CP-even and CP-odd Higgs bosons to top and bottom quarks at NNLO QCD

open access: yesJournal of High Energy Physics, 2018
We consider the decay of a neutral Higgs boson of arbitrary CP nature to a massive quark antiquark pair at next-to-next-to-leading order in perturbative QCD. Our analysis is made at the differential level using the antenna subtraction framework. We apply
Werner Bernreuther   +2 more
doaj   +3 more sources

Bottom (70,1-) baryon multiplet [PDF]

open access: yesE3S Web of Conferences, 2020
The aim of this paper is to derive systems of equations for the amplitudes for the case of negative parity (70,1-) bottom nonstrange baryons and to calculate the masses of these particles. In order to calculate masses of (70,1-) bottom baryons we use the
Matskevich Elena
doaj   +1 more source

Search for W′ bosons decaying to a top and a bottom quark at s=13TeV in the hadronic final state

open access: yesPhysics Letters B, 2021
A search is performed for W′ bosons decaying to a top and a bottom quark in the all-hadronic final state, in proton-proton collisions at a center-of-mass energy of 13TeV.
A.M. Sirunyan   +2332 more
doaj   +1 more source

Improved indirect limits on charm and bottom quark EDMs

open access: yesJournal of High Energy Physics, 2022
We derive indirect limits on the charm and bottom quark electric dipole moments (EDMs) from paramagnetic AMO and neutron EDM experiments. The charm and bottom quark EDMs generate CP-odd photon-gluon operators and light quark EDMs at the c- and b-quark ...
Yohei Ema, Ting Gao, Maxim Pospelov
doaj   +1 more source

Viscous QCD medium effects on the bottom quark transport coefficients

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
The bottom quark transport coefficients, i.e., drag and diffusion coefficients, have been studied for the collisional and soft gluon radiative processes within the viscous QCD medium.
Adiba Shaikh   +2 more
doaj   +1 more source

Search for a light charged Higgs boson in t → H ± b decays, with H ± → cb, in the lepton+jets final state in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

open access: yesJournal of High Energy Physics, 2023
A search for a charged Higgs boson, H ± , produced in top-quark decays, t → H ± b, is presented. The search targets H ± decays into a bottom and a charm quark, H ± → cb. The analysis focuses on a selection enriched in top-quark pair production, where one
The ATLAS collaboration   +2901 more
doaj   +1 more source

Bottom quark mass with calibrated uncertainty

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
We determine the bottom quark mass $${\hat{m}}_b$$ m ^ b from QCD sum rules of moments of the vector current correlator calculated in perturbative QCD to $${{\mathcal {O}}} ({\hat{\alpha }}_s^3)$$ O ( α ^ s 3 ) .
Jens Erler   +2 more
doaj   +1 more source

Top-Quark Mass and Bottom-Quark Decay [PDF]

open access: yes, 1983
The possibility of a long B-meson lifetime is explored, in which case the weak mixing angles θ_2 and θ_3 are quite small. This allows the derivation of a lower bound on the top-quark mass as a function of the B-meson lifetime, by comparison of the short ...
Ginsparg, Paul H.   +2 more
core   +2 more sources

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