Bottom quarks - Open Access .click

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Heavy quark symmetry behind b → c semileptonic sum rule

Journal 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

Search for dark matter produced in association with a pair of bottom quarks in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV

Journal of High Energy Physics
A search for dark matter (DM) particles produced in association with bottom quarks is presented. The analysis uses proton-proton collision data at a center-of-mass energy of s $$ \sqrt{s} $$ = 13 TeV, corresponding to an integrated luminosity of 138 fb ...
The CMS collaboration +2394 more
doaj +1 more source

Precise Charm and Bottom quark masses

, 2007
4 pages, 2 figures, talk given by Johann H.
Kühn, J. H., Steinhauser, M., Sturm, Ch. +2 more
openaire +2 more sources

Total decay rates of B mesons at NNLO-QCD

Journal of High Energy Physics
We update the Standard Model (SM) predictions for the lifetimes of the B +, B d and B s mesons within the heavy quark expansion (HQE), including the recently determined NNLO-QCD corrections to non-leptonic decays of the free b-quark.
Manuel Egner +6 more
doaj +1 more source

Challenging B ¯ s → D s ∗ $$ {\overline{B}}_{(s)}\to {D}_{(s)}^{\left(\ast \right)} $$ form factors with the heavy quark expansion

Journal of High Energy Physics
Recent publications by three lattice QCD collaborations have provided an unprecedented wealth of theoretical predictions for the B ¯ q → D q ∗ $$ {\overline{B}}_q\to {D}_q^{\left(\ast \right)} $$ form factors, for spectator flavours q = u/d and q = s. We
Marzia Bordone +3 more
doaj +1 more source

Nonperturbative parameters of inclusive Λ b decays from Small Velocity Sum Rules

Journal of High Energy Physics
We investigate the nonperturbative parameters entering the heavy quark expansion for the inclusive decay rates of the Λ b baryon, focusing on the kinetic term μ ̂ π 2 $$ {\hat{\mu}}_{\pi}^2 $$ and the Darwin term ρ ̂ D 3 $$ {\hat{\rho}}_D^3 $$ .
Blaženka Melić, Ivan Nišandžić
doaj +1 more source

Analyzing the semileptonic and nonleptonic B c → J/ψ, η c decays

Journal of High Energy Physics
This study focuses on the decay of the B c meson to S-wave charmonia. Starting with lattice inputs on B c → J/ψ form factors, we have obtained the B c → η c form factors using heavy quark spin symmetry (HQSS) relations between the associated form factors
Aritra Biswas, Soumitra Nandi, Shantanu Sahoo +2 more
doaj +1 more source

Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in proton-proton collisions at s = 13 Te . [PDF]

Eur Phys J C Part Fields, 2019
Sirunyan AM +2297 more
europepmc +1 more source

Light Quark Mass Effects in Bottom Quark Mass Determinations

, 2001
Invited talk presented at RADCOR-2000, Carmel, CA, Sep. 2000; 15 pages, latex, 3 postscript figures; eliminated typo in Eq.(3)
openaire +2 more sources

Towards a global analysis of the b → c u ¯ q $$ b\to c\overline{u}q $$ puzzle

Journal of High Energy Physics
We study the nonleptonic decays B ¯ s 0 → D s ∗ + π − $$ {\overline{B}}_s^0\to {D}_s^{\left(\ast \right)+}{\pi}^{-} $$ and B ¯ 0 → D ∗ + K − $$ {\overline{B}}^0\to {D}^{\left(\ast \right)+}{K}^{-} $$ within the Weak Effective Theory (WET) up to mass ...
Stefan Meiser, Danny van Dyk, Javier Virto +2 more
doaj +1 more source

semi-leptonic decays
rare decays
cp violation

flavour symmetries