Results 21 to 30 of about 64,447 (308)

Probing the spin correlations of $$t{\bar{t}} $$ t t ¯ production at NLO QCD+EW

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
In this work we investigate the NLO QCD+EW corrections to the top quark pair production and their effects on the spin correlation coefficients and asymmetries at fixed-order top quark pair production and LO decay in the dilepton channel, within the ...
Rikkert Frederix   +2 more
doaj   +1 more source

Modeling theoretical uncertainties in phenomenological analyses for particle physics [PDF]

open access: yesThe European Physical Journal C, 2017
The determination of the fundamental parameters of the Standard Model (and its extensions) is often limited by the presence of statistical and theoretical uncertainties. We present several models for the latter uncertainties (random, nuisance, external) in the frequentist framework, and we derive the corresponding $p$-values.
Charles, Jérôme   +3 more
openaire   +5 more sources

Two-loop amplitudes for processes gg → Hg, qg → Hq and qq¯→Hg $$ \mathrm{q}\overline{\mathrm{q}}\to \mathrm{H}\mathrm{g} $$ at large Higgs transverse momentum

open access: yesJournal of High Energy Physics, 2018
We compute the two-loop QCD corrections to amplitudes for processes gg → Hg, qg → Hq and qq¯→Hg $$ q\overline{q}\to Hg $$ in the limit when the Higgs transverse momentum is larger than the top quark mass, p ⊥ ≫ m t .
Kirill Kudashkin   +2 more
doaj   +1 more source

Welcome to theoretical particle physics [PDF]

open access: yesNature, 1982
Gauge Theories in Particle Physics: A Practical Introduction. By Ian J.R. Aitchison and Anthony J.G. Hey. Pp.341. Pbk ISBN 0-85274-534-6. (Adam Hilger/Heyden: 1982.) £14.50, $36.
openaire   +1 more source

Theoretical Studies in Elementary Particle Physics [PDF]

open access: yes, 2013
This final report summarizes work at Penn State University from June 1, 1990 to April 30, 2012. The work was in theoretical elementary particle physics. Many new results in perturbative QCD, in string theory, and in related areas were obtained, with a substantial impact on the experimental program.
Collins, John C., Roiban, Radu S
openaire   +2 more sources

Studies In Theoretical High Energy Particle Physics [PDF]

open access: yes, 2017
This report discusses String models and field theories in High Energy Physics. Symmetry principles are discussed as well as elementary particle interactions. (LSP)
Aratyn, H.   +3 more
openaire   +6 more sources

Impact of string interactions on the space–time evolution of hadronic vertices

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We investigate the space–time picture of string evolution and hadron production in a fully string-based model for high energy collisions involving heavy-ions.
Smita Chakraborty, Leif Lönnblad
doaj   +1 more source

Theoretical particle physics [PDF]

open access: yes, 1990
My research in lattice gauge theory during the past year is described. Several projects were completed dealing with QCD simulations including dynamical fermions. Under the DOE Grand Challenge program, a large scale calculation of the QCD spectrum with two light flavors of dynamical staggered quarks was carried out.
openaire   +2 more sources

Electroweak baryogenesis above the electroweak scale

open access: yesJournal of High Energy Physics, 2019
Conventional scenarios of electroweak (EW) baryogenesis are strongly constrained by experimental searches for CP violation beyond the SM. We propose an alternative scenario where the EW phase transition and baryogenesis occur at temperatures of the order
Alfredo Glioti   +2 more
doaj   +1 more source

Subleading EW corrections and spin-correlation effects in $$t\bar{t}W$$ tt¯W multi-lepton signatures

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
Recently a slight tension between data and predictions has been reported in $$t\bar{t}W$$ tt¯W production by both the CMS and ATLAS collaborations. We revisit the theoretical predictions for this process, focussing on the following two effects.
Rikkert Frederix, Ioannis Tsinikos
doaj   +1 more source

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