Results 1 to 10 of about 2,164 (186)

Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method. [PDF]

open access: greenEur Phys J C Part Fields, 2015
Khachatryan V   +2175 more
europepmc   +3 more sources

Evidence for intrinsic charm quarks in the proton [PDF]

open access: yesNature, 2022
, Juan Cruz-Martinez, Felix Hekhorn
exaly   +2 more sources

Effects of isospin violation in the e + e − → B (*) B ¯ $$ \overline{B} $$ (*) cross sections

open access: yesJournal of High Energy Physics, 2022
Model estimates are obtained for the influence of Coulomb effects on the ratio of the cross sections for the production of charged and neutral B B ¯ $$ \overline{B} $$ and B * B ¯ $$ \overline{B} $$ * pairs in e + e − annihilation.
A. E. Bondar   +3 more
doaj   +1 more source

Soft logarithms in processes with heavy quarks

open access: yesJournal of High Energy Physics, 2022
Observables involving heavy quarks can be computed in perturbative QCD in two different approximation schemes: either the quark mass dependence is fully retained, or it is retained only where needed to regulate the collinear singularity.
Daniele Gaggero   +3 more
doaj   +1 more source

Light-cone sum rules for S-wave B → Kπ form factors

open access: yesJournal of High Energy Physics, 2023
We derive a set of light-cone sum rules relating the S-wave B → Kπ hadronic form factors to the B-meson light-cone distribution amplitudes (LCDAs), taking into account the complete set of LCDAs up to and including twist four. These results complement the
Sébastien Descotes-Genon   +3 more
doaj   +1 more source

Signals with six bottom quarks for charged and neutral Higgs bosons

open access: yesJournal of High Energy Physics, 2020
In extensions of two Higgs doublet models with vectorlike quarks, the decays of vectorlike quarks may easily be dominated by cascade decays through charged or neutral Higgs bosons leading to signatures with 6 top or bottom quarks.
Radovan Dermisek   +3 more
doaj   +1 more source

Insights on the current semi-leptonic B-decay discrepancies — and how B s → μ + μ − γ can help

open access: yesJournal of High Energy Physics, 2023
B s → μ + μ − γ, measured at high q 2 as a partially reconstructed decay, can probe the origin of the existing discrepancies in semi-leptonic b → s and b → c decays. We perform a complete study of this possibility.
Diego Guadagnoli   +3 more
doaj   +1 more source

Dispersive analysis of Λ b → Λ(1520) local form factors

open access: yesJournal of High Energy Physics, 2023
We perform an analysis of Λ b → Λ(1520) local form factors. We use dispersive techniques to provide a model-independent parametrisation of the form factors that can be used in the whole kinematic region.
Yasmine Amhis   +2 more
doaj   +1 more source

From D s → γ in lattice QCD to B s → μμγ at high q 2

open access: yesJournal of High Energy Physics, 2023
We use a recent lattice determination of the vector and axial D s → γ form factors at high squared momentum transfer q 2 to infer their B s → γ counterparts. To this end, we introduce a phenomenological approach summarized as follows.
Diego Guadagnoli   +3 more
doaj   +1 more source

Zooming into CP violation in B (s) → hh decays

open access: yesJournal of High Energy Physics, 2023
The LHCb collaboration has recently reported the first observation of CP violation in the penguin-dominated B s 0 $$ {B}_s^0 $$ → K − K + decay and further new measurements, indicating differences between the direct CP asymmetries of both the B s 0 $$ {B}
Robert Fleischer   +2 more
doaj   +1 more source

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