Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Melic, Blazenka"'
We overview the current status and future perspectives of the QCD-based method of light-cone sum rules. The two main versions of these sum rules, using light-meson and $B$-meson distribution amplitudes are introduced and the most important applicatio
Externí odkaz:
http://arxiv.org/abs/2311.08700
We present updated predictions for lifetimes of doubly charmed baryons, within the heavy quark expansion, including available NLO $\alpha_s$ contributions and newly-computed terms in the $1/m_c$ series. Our improved results confirm the expected hiera
Externí odkaz:
http://arxiv.org/abs/2305.02243
We provide updated predictions of the lifetimes of singly charmed baryons and mesons within the heavy quark expansion, with all known corrections included. A special attention is devoted to the choice of the charm mass and wavefunctions of heavy bary
Externí odkaz:
http://arxiv.org/abs/2304.08404
Publikováno v:
JHEP 08 (2023) 063
We fit the available data on exclusive semileptonic $b\to u\ell^-\bar\nu$ decays within the Standard Model and in the Weak Effective Theory. Assuming Standard Model dynamics, we find $|V_{ub}| = 3.59^{+0.13}_{-0.12} \times 10^{-3}$. Lifting this assu
Externí odkaz:
http://arxiv.org/abs/2302.05268
Autor:
Gratrex, James, Lenz, Alexander, Melić, Blaženka, Nišandžić, Ivan, Piscopo, Maria Laura, Rusov, Aleksey V.
In the 1990s, very low experimental values for the lifetime ratio $\tau (\Lambda_b)/\tau(B_d)$ triggered a considerable amount of doubt in the applicability of the heavy quark expansion (HQE), which is based on the assumption of quark-hadron duality
Externí odkaz:
http://arxiv.org/abs/2301.07698
Publikováno v:
JHEP 07 (2022) 058
We provide an extensive study of the lifetimes of singly charmed baryons and mesons, within the heavy quark expansion with all known corrections included. A special attention is devoted to the choice of the charm mass and wavefunctions of heavy baryo
Externí odkaz:
http://arxiv.org/abs/2204.11935
We revisit light-cone sum rules with pion distribution amplitudes to determine the full set of local $B \to \pi$ form factors. To this end, we determine all duality threshold parameters from a Bayesian fit for the first time. Our results, obtained at
Externí odkaz:
http://arxiv.org/abs/2102.07233
We revisit the calculation of the strong couplings $D^*D\pi$ and $B^*B\pi$ from the QCD light-cone sum rules using the pion light-cone distribution amplitudes. The accuracy of the correlation function, calculated from the operator product expansion n
Externí odkaz:
http://arxiv.org/abs/2011.11275
Publikováno v:
Eur. Phys. J. C79 (2019) no.11, 948
We elaborate on the dichotomy between the description of the semileptonic decays of heavy hadrons on the one hand and the semileptonic decays of light hadrons such as neutron $\beta$ decays on the other hand. For example, almost without exception the
Externí odkaz:
http://arxiv.org/abs/1910.00283
Autor:
Leljak, Domagoj, Melic, Blazenka
In light of prospects for measurements of $B_c \rightarrow D^{(\ast)} l \nu$ decays in the upcoming Upgrade II of the LHC, we show that by using calculated $B_c \rightarrow D^{(\ast)}$ form factors competitive extraction of the $|V_{ub}|$ CKM matrix
Externí odkaz:
http://arxiv.org/abs/1909.01213