Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Khodjamirian, Alexander"'
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
Publikováno v:
JHEP 12 (2023) 015
We present the first application of QCD light-cone sum rules (LCSRs) with $B_{(s)}$-meson distribution amplitudes to the $B_{(s)}\!\to\! D_{(s)0}^*$ form factors, where $D_{(s)0}^*$ is a charmed scalar meson. We consider two scenarios for the $D_0^*$
Externí odkaz:
http://arxiv.org/abs/2309.10165
We derive a set of light-cone sum rules relating the $S$-wave $B\to K \pi$ 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
Externí odkaz:
http://arxiv.org/abs/2304.02973
We derive new sum rules for the form factors of the $B_c\to J/\psi\, \ell \bar{\nu}_\ell$ semileptonic transitions, employing the vacuum-to-$B_c$ correlation function of the $J/\psi$-interpolating and $b\to c$ weak currents. In the heavy quark limit
Externí odkaz:
http://arxiv.org/abs/2209.08851
Autor:
Khodjamirian, Alexander, Wald, Marcel
The recently developed $B$-Mesogenesis scenario predicts decays of $B$ mesons into a baryon and hypothetical dark antibaryon $\Psi$. We suggest a method to calculate the amplitude of the simplest exclusive decay mode $B^+\to p \Psi$. Considering two
Externí odkaz:
http://arxiv.org/abs/2206.11601
Publikováno v:
JHEP 05 (2022) 029
We perform the first calculation of form factors in the semileptonic decays $B\!\to\! D_1(2420)\ell\nu_\ell$ and $B \to D_1^\prime (2430)\ell \nu_\ell$ using QCD light-cone sum rules (LCSRs) with $B$-meson distribution amplitudes. In this calculation
Externí odkaz:
http://arxiv.org/abs/2203.08493
Autor:
Khodjamirian, Alexander
I discuss the calculation of the direct CP-asymmetry in $D\to \pi^+\pi^-$ and $D\to K^+K^- $ decays with the method of QCD light-cone sum rules. The main result is the upper limit for the difference of the two asymmetries $\left|\Delta a_{CP}^{dir}\r
Externí odkaz:
http://arxiv.org/abs/2110.11752
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:
JHEP 10 (2020) 043
We derive a QCD sum rule for the inverse moment of the $B_s$-meson light-cone distribution amplitude in HQET. Within this method, the $SU(3)_{fl}$ symmetry violation is traced to the strange quark mass and to the difference between strange and nonstr
Externí odkaz:
http://arxiv.org/abs/2008.03935