Results 51 to 60 of about 2,021,845 (193)

High-pT LHC constraints on SMEFT operators affecting rare kaon and hyperon decays

open access: yesJournal of High Energy Physics
We consider the constraints on new physics affecting rare kaon and hyperon decay as parametrized by a low energy effective theory that can be obtained from high-pT observables at LHC. To this end, we match the relevant low energy Wilson coefficients onto
Arnab Roy, German Valencia
doaj   +1 more source

Investigating non-local contributions in B s → ϕ ℓ ¯ ℓ $$ {B}_s\to \phi \overline{\ell}\ell $$ including higher-twist effects

open access: yesJournal of High Energy Physics
We analyze the impact of higher-twist three-particle B s -meson light-cone distribution amplitudes (LCDAs) on the non-local form factors for the B s → ϕ ℓ ¯ ℓ $$ {B}_s\to \phi \overline{\ell}\ell $$ transition focusing on the ‘charm-loop’ contribution ...
M. S. A. Alam Khan   +3 more
doaj   +1 more source

Flavor physics in the quark sector [PDF]

open access: yes, 2008
In the past decade, one of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor. In this time frame, measurements and the theoretical interpretation of their results have advanced tremendously. A
Smith, Christopher   +999 more
core   +1 more source

Inclusive B ¯ → X s ℓ + ℓ − $$ \overline{B}\to {X}_s{\ell}^{+}{\ell}^{-} $$ at the LHC: theory predictions and new-physics reach

open access: yesJournal of High Energy Physics
We present theoretical predictions for observables in inclusive B ¯ → X s ℓ + ℓ − $$ \overline{B}\to {X}_s{\ell}^{+}{\ell}^{-} $$ suitable for measurements at hadron colliders through a sum-over-exclusive approach.
Tobias Huber   +5 more
doaj   +1 more source

Form factors for semi-leptonic B decays [PDF]

open access: yesProceedings of The 30th International Symposium on Lattice Field Theory — PoS(Lattice 2012), 2012
We report on form factors for the B->K l^+ l^- semi-leptonic decay process. We use several lattice spacings from a=0.12 fm down to 0.06 fm and a variety of dynamical quark masses with 2+1 flavors of asqtad quarks provided by the MILC Collaboration. These ensembles allow good control of the chiral and continuum extrapolations.
Zhou, Ran   +9 more
openaire   +2 more sources

Nonlocal form factor of chromomagnetic penguin in B → Kℓ + ℓ − from QCD light-cone sum rules

open access: yesJournal of High Energy Physics
The branching fraction of the B → Kℓ + ℓ − decay has been measured recently by the LHC experiments, showing a deviation from theory predictions based on the Standard Model (SM).
T. Hurth   +5 more
doaj   +1 more source

Search for top quark decays t → qH with H → γγ using the ATLAS detector [PDF]

open access: yes, 2014
A search is performed for flavour-changing neutral currents in the decay of a top quark to an up-type (c, u) quark and a Higgs boson, where the Higgs boson decays to two photons.
G. Khoriauli   +999 more
core   +4 more sources

Heavy quark symmetry behind b → c semileptonic sum rule

open access: yesJournal of High Energy Physics
Lepton flavor universality violations in semileptonic b → c transitions have garnered attention over a decade. For $${R}_{{H}_{c}}={\text{BR}}\left({H}_{b}\to {H}_{c}\tau {\overline{\nu }}_{\tau }\right)/{\text{BR}}\left({H}_{b}\to {H}_{c}{\ell ...
Motoi Endo   +3 more
doaj   +1 more source

CP-violation in cascade decays at the LHC [PDF]

open access: yes, 2010
We study the potential to observe CP-violating effects in various supersymmetric cascade decay chains at the LHC. Asymmetries composed by triple products of momenta of the final state particles are sensitive to CP-violating effects.
TATTERSALL, JAMIE
core  

Dispersive analysis of B → K (*) and B s → ϕ form factors

open access: yesJournal of High Energy Physics, 2023
We propose a stronger formulation of the dispersive (or unitarity) bounds à la Boyd-Grinstein-Lebed (BGL), which are commonly applied in analyses of the hadronic form factors for B decays.
Nico Gubernari   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy