Results 81 to 90 of about 82,911 (161)

Decoupling of heavy quarks at four loops and effective Higgs-fermion coupling

open access: yesPhysics Letters B, 2015
We compute the decoupling constant ζm relating light quark masses of effective nl-flavour QCD to (nl+1)-flavour QCD to four-loop order. Immediate applications are the evaluation of the MS¯ charm quark mass with five active flavours and the bottom quark ...
Tao Liu, Matthias Steinhauser
doaj   +1 more source

NLO QCD corrections to top anti-top bottom anti-bottom production at the LHC: 1. quark-antiquark annihilation

open access: yes, 2008
The process pp -> top anti-top bottom anti-bottom + X represents a very important background reaction to searches at the LHC, in particular to top anti-top H production where the Higgs boson decays into a bottom anti-bottom pair. A successful analysis of
Bredenstein, Axel   +3 more
core   +1 more source

Spatially Explicit Model to Disentangle Effects of Environment on Annual Fish Reproduction

open access: yesEnvironmetrics, Volume 36, Issue 2, March 2025.
ABSTRACT Population growth models are essential tools for natural resources management and conservation since they provide understanding on factors affecting renewal of natural animal populations. However, we still do not properly understand how the processes underlying reproduction of natural animal populations are affected by the environment at the ...
Ilaria Pia   +3 more
wiley   +1 more source

The bottom-quark mass from non-relativistic sum rules at NNNLO

open access: yesNuclear Physics B, 2015
We determine the mass of the bottom quark from high moments of the bb¯ production cross section in e+e− annihilation, which are dominated by the threshold region.
M. Beneke, A. Maier, J. Piclum, T. Rauh
doaj   +1 more source

Visible GeV ALP from TeV Vector‐Like Leptons

open access: yesFortschritte der Physik, Volume 73, Issue 3, March 2025.
Abstract A model is presented where a GeV axion‐like‐particle (ALP) is predicted in a large portion of the parameter space due to the presence of explicit Peccei–Quinn (PQ) symmetry‐breaking terms in an exotic leptonic sector. The latter provides a solution to the muon g−2$g-2$ anomaly, within the framework of the Linear Seesaw neutrino mechanism.
Arturo de Giorgi   +2 more
wiley   +1 more source

Non-perturbative bottom PDF and its possible impact on new physics searches

open access: yes, 2015
Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most PDF analyses rely on the assumption that the charm and bottom PDFs are generated perturbatively by gluon splitting and do ...
Kusina, A.
core   +4 more sources

Energy loss of heavy quarks in the isotropic collisional hot QCD medium

open access: yesEuropean Physical Journal C: Particles and Fields, 2019
The collisional energy loss of heavy partons (charm and bottom quarks) has been determined within the framework of semi-classical transport theory implying the Bhatnagar–Gross–Krook (BGK) collisional kernel.
M. Yousuf Jamal, Vinod Chandra
doaj   +1 more source

Quark production in the bottom-up thermalization

open access: yesPhysics Letters B
We investigate the impact of quark production on bottom-up thermalization in heavy-ion collisions. First, we extend the parametric estimates of bottom-up thermalization in pure gluon systems by incorporating quark production in the weak-coupling (high ...
Sergio Barrera Cabodevila   +3 more
doaj   +1 more source

Analytic decay width of the Higgs boson to massive bottom quarks at order α s 3 $$ {\alpha}_s^3 $$

open access: yesJournal of High Energy Physics
The Higgs boson decay into bottom quarks is the dominant decay channel contributing to its total decay width, which can be used to measure the bottom quark Yukawa coupling and mass.
Jian Wang, Xing Wang, Yefan Wang
doaj   +1 more source

Search for heavy resonances decaying to a top quark and a bottom quark in the lepton+jets final state in proton–proton collisions at 13 TeV

open access: yesPhysics Letters B, 2018
A search is presented for narrow heavy resonances decaying to a top quark and a bottom quark using data collected by the CMS experiment at s=13TeV in 2016. The data set analyzed corresponds to an integrated luminosity of 35.9fb−1 .
A.M. Sirunyan   +2233 more
doaj   +1 more source

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